make-config.sh

   1 #!/bin/sh -
   2 #@ Please see INSTALL and make.rc instead.
   3
   4 LC_ALL=C
   5 export LC_ALL
   6
   7 : ${SHELL:=/bin/sh}
   8
   9 # The feature set, to be kept in sync with make.rc
  10 # If no documentation given, the option is used as such; if doc is a hyphen,
  11 # entry is suppressed when configuration overview is printed, and also in the
  12 # *features* string: most likely for obsolete features etc.
  13 XOPTIONS="\
  14    ICONV='Character set conversion using iconv(3)' \
  15    SOCKETS='Network support' \
  16       SSL='SSL/TLS (OpenSSL / LibreSSL)' \
  17          SSL_ALL_ALGORITHMS='Support of all digest and cipher algorithms' \
  18       SMTP='Simple Mail Transfer Protocol client' \
  19       POP3='Post Office Protocol Version 3 client' \
  20       IMAP='IMAP v4r1 client' \
  21       GSSAPI='Generic Security Service authentication' \
  22       NETRC='.netrc file support' \
  23       AGENT='-' \
  24       MD5='MD5 message digest (APOP, CRAM-MD5)' \
  25    IDNA='Internationalized Domain Names for Applications (encode only)' \
  26    IMAP_SEARCH='IMAP-style search expressions' \
  27    REGEX='Regular expressions' \
  28    MLE='Mailx Line Editor' \
  29       HISTORY='Line editor history management' \
  30       KEY_BINDINGS='Configurable key bindings' \
  31    TERMCAP='Terminal capability queries (termcap(5))' \
  32       TERMCAP_VIA_TERMINFO='Terminal capability queries use terminfo(5)' \
  33    ERRORS='Error log message ring' \
  34    SPAM_SPAMC='Spam management via spamc(1) of spamassassin(1)' \
  35    SPAM_SPAMD='-' \
  36    SPAM_FILTER='Freely configurable *spam-filter-..*s' \
  37    DOCSTRINGS='Command documentation help strings' \
  38    QUOTE_FOLD='Extended *quote-fold*ing' \
  39    FILTER_HTML_TAGSOUP='Simple built-in HTML-to-text display filter' \
  40    COLOUR='Coloured message display' \
  41    DOTLOCK='Dotlock files and privilege-separated dotlock program' \
  42 "
  43
  44 # Options which are automatically deduced from host environment, i.e., these
  45 # need special treatment all around here to warp from/to OPT_ stuff
  46 # setlocale, C90AMEND1, NL_LANGINFO, wcwidth
  47 XOPTIONS_DETECT="\
  48    LOCALES='Locale support - printable characters etc. depend on environment' \
  49    MULTIBYTE_CHARSETS='Multibyte character sets' \
  50    TERMINAL_CHARSET='Automatic detection of terminal character set' \
  51    WIDE_GLYPHS='Wide glyph support' \
  52 "
  53
  54 # Rather special options, for custom building, or which always exist.
  55 # Mostly for generating the visual overview and the *features* string
  56 XOPTIONS_XTRA="\
  57    MIME='Multipurpose Internet Mail Extensions' \
  58    SMIME='S/MIME message signing, verification, en- and decryption' \
  59    CROSS_BUILD='Cross-compilation: trust any detected environment' \
  60    DEBUG='Debug enabled binary, not for end-users: THANKS!' \
  61    DEVEL='Computers do not blunder' \
  62 "
  63
  64 # The problem is that we don't have any tools we can use right now, so
  65 # encapsulate stuff in functions which get called in right order later on
  66
  67 option_reset() {
  68    set -- ${OPTIONS}
  69    for i
  70    do
  71       eval OPT_${i}=0
  72    done
  73 }
  74
  75 option_maximal() {
  76    set -- ${OPTIONS}
  77    for i
  78    do
  79       eval OPT_${i}=1
  80    done
  81    OPT_DOTLOCK=require OPT_ICONV=require OPT_REGEX=require
  82 }
  83
  84 option_setup() {
  85    option_parse OPTIONS_DETECT "${XOPTIONS_DETECT}"
  86    option_parse OPTIONS "${XOPTIONS}"
  87    option_parse OPTIONS_XTRA "${XOPTIONS_XTRA}"
  88    OPT_MIME=1
  89
  90    # Predefined CONFIG= urations take precedence over anything else
  91    if [ -n "${CONFIG}" ]; then
  92       option_reset
  93       case "${CONFIG}" in
  94       [nN][uU][lL][lL])
  95          ;;
  96       [nN][uU][lL][lL][iI])
  97          OPT_ICONV=require
  98          ;;
  99       [mM][iI][nN][iI][mM][aA][lL])
 100          OPT_DOTLOCK=require OPT_ICONV=require OPT_REGEX=require
 101          OPT_COLOUR=1
 102          OPT_DOCSTRINGS=1
 103          OPT_ERRORS=1
 104          OPT_IDNA=1
 105          OPT_MLE=1
 106             OPT_HISTORY=1 OPT_KEY_BINDINGS=1
 107          OPT_SPAM_FILTER=1
 108          ;;
 109       [nN][eE][tT][sS][eE][nN][dD])
 110          OPT_DOTLOCK=require OPT_ICONV=require OPT_REGEX=require
 111          OPT_SOCKETS=require
 112             OPT_SSL=require
 113             OPT_SMTP=require
 114             OPT_GSSAPI=1 OPT_NETRC=1
 115                OPT_AGENT=1
 116          OPT_COLOUR=1
 117          OPT_DOCSTRINGS=1
 118          OPT_ERRORS=1
 119          OPT_IDNA=1
 120          OPT_MLE=1
 121             OPT_HISTORY=1 OPT_KEY_BINDINGS=1
 122          OPT_SPAM_FILTER=1
 123          ;;
 124       [mM][aA][xX][iI][mM][aA][lL])
 125          option_maximal
 126          ;;
 127       [dD][eE][vV][eE][lL])
 128          option_maximal
 129          OPT_DEVEL=1 OPT_DEBUG=1 OPT_NYD2=1
 130          ;;
 131       [oO][dD][eE][vV][eE][lL])
 132          option_maximal
 133          OPT_DEVEL=1
 134          ;;
 135       *)
 136          echo >&2 "Unknown CONFIG= setting: ${CONFIG}"
 137          echo >&2 '   NULL, NULLI, MINIMAL, NETSEND, MAXIMAL'
 138          exit 1
 139          ;;
 140       esac
 141       msg_nonl "CONFIG=${CONFIG} ... "
 142    fi
 143 }
 144
 145 # Inter-relationships
 146 option_update() {
 147    if feat_no SMTP && feat_no POP3 && feat_no IMAP; then
 148       OPT_SOCKETS=0
 149    fi
 150    if feat_no SOCKETS; then
 151       if feat_require SMTP; then
 152          msg 'ERROR: need SOCKETS for required feature SMTP'
 153          config_exit 13
 154       fi
 155       if feat_require POP3; then
 156          msg 'ERROR: need SOCKETS for required feature POP3'
 157          config_exit 13
 158       fi
 159       if feat_require IMAP; then
 160          msg 'ERROR: need SOCKETS for required feature IMAP'
 161          config_exit 13
 162       fi
 163       OPT_SSL=0 OPT_SSL_ALL_ALGORITHMS=0
 164       OPT_SMTP=0 OPT_POP3=0 OPT_IMAP=0
 165       OPT_GSSAPI=0 OPT_NETRC=0 OPT_AGENT=0
 166    fi
 167    if feat_no SMTP && feat_no IMAP; then
 168       OPT_GSSAPI=0
 169    fi
 170
 171    if feat_no ICONV; then
 172       if feat_yes IMAP; then
 173          if feat_require IMAP; then
 174             msg 'ERROR: need ICONV for required feature IMAP'
 175             config_exit 13
 176          fi
 177          msg 'ERROR: disabling IMAP due to missing ICONV'
 178          OPT_IMAP=0
 179       fi
 180
 181       if feat_yes IDNA; then
 182          if feat_require IDNA; then
 183             msg 'ERROR: need ICONV for required feature IDNA'
 184             config_exit 13
 185          fi
 186          msg 'ERROR: disabling IDNA due to missing ICONV'
 187          OPT_IDNA=0
 188       fi
 189    fi
 190
 191    if feat_no MLE; then
 192       OPT_HISTORY=0 OPT_KEY_BINDINGS=0
 193    fi
 194
 195    # If we don't need MD5 leave it alone
 196    if feat_no SOCKETS; then
 197       OPT_MD5=0
 198    fi
 199
 200    if feat_no TERMCAP; then
 201       OPT_TERMCAP_VIA_TERMINFO=0
 202    fi
 203
 204    if feat_yes DEVEL; then
 205       OPT_DEBUG=1
 206    fi
 207 }
 208
 209 rc=./make.rc
 210 lst=./mk-config.lst
 211 ev=./mk-config.ev
 212 h=./mk-config.h h_name=mk-config.h
 213 mk=./mk-config.mk
 214
 215 newlst=./mk-nconfig.lst
 216 newmk=./mk-nconfig.mk
 217 newev=./mk-nconfig.ev
 218 newh=./mk-nconfig.h
 219 tmp0=___tmp
 220 tmp=./${tmp0}1$$
 221 tmp2=./${tmp0}2$$
 222
 223 ##  --  >8  - << OPTIONS | OS/CC >> -  8<  --  ##
 224
 225 # Note that potential duplicates in PATH, C_INCLUDE_PATH etc. will be cleaned
 226 # via path_check() later on once possible
 227
 228 # TODO cc_maxopt is brute simple, we should compile test program and dig real
 229 # compiler versions for known compilers, then be more specific
 230 cc_maxopt=100
 231 _CFLAGS= _LDFLAGS=
 232
 233 os_early_setup() {
 234    # We don't "have any utility": only path adjustments and such in here!
 235    i="${OS:-`uname -s`}"
 236
 237    if [ ${i} = SunOS ]; then
 238       msg 'SunOS / Solaris?  Applying some "early setup" rules ...'
 239       _os_early_setup_sunos
 240    fi
 241 }
 242
 243 _os_early_setup_sunos() {
 244    # According to standards(5), this is what we need to do
 245    if [ -d /usr/xpg4 ]; then :; else
 246       msg 'ERROR: On SunOS / Solaris we need /usr/xpg4 environment!  Sorry.'
 247       config_exit 1
 248    fi
 249    PATH="/usr/xpg4/bin:/usr/ccs/bin:/usr/bin:${PATH}"
 250    [ -d /usr/xpg6 ] && PATH="/usr/xpg6/bin:${PATH}"
 251    export PATH
 252 }
 253
 254 os_setup() {
 255    # OSENV ends up in *build-osenv*
 256    # OSFULLSPEC is used to recognize changes (i.e., machine type, updates etc.)
 257    : ${OS:=`uname -s | ${tr} '[A-Z]' '[a-z]'`}
 258    : ${OSENV:=`uname -srm`}
 259    : ${OSFULLSPEC:=`uname -a`}
 260    msg 'Operating system is %s' ${OS}
 261
 262    if [ ${OS} = darwin ]; then
 263       msg ' . have special Darwin environmental addons...'
 264       LD_LIBRARY_PATH=${LD_LIBRARY_PATH}:${DYLD_LIBRARY_PATH}
 265    elif [ ${OS} = sunos ]; then
 266       msg ' . have special SunOS / Solaris "setup" rules ...'
 267       _os_setup_sunos
 268    elif [ ${OS} = unixware ]; then
 269       if feat_yes AUTOCC && command -v cc >/dev/null 2>&1; then
 270          msg ' . have special UnixWare environmental rules ...'
 271          CC=cc
 272          feat_yes DEBUG && _CFLAGS='-v -Xa -g' || _CFLAGS='-Xa -O'
 273
 274          CFLAGS="${_CFLAGS} ${EXTRA_CFLAGS}"
 275          LDFLAGS="${_LDFLAGS} ${EXTRA_LDFLAGS}"
 276          export CC CFLAGS LDFLAGS
 277          OPT_AUTOCC=0 had_want_autocc=1 need_R_ldflags=-R
 278       fi
 279    elif [ -n "${VERBOSE}" ]; then
 280       msg ' . no special treatment for this system necessary or known'
 281    fi
 282
 283    # Sledgehammer: better set _GNU_SOURCE
 284    # And in general: oh, boy!
 285    OS_DEFINES="${OS_DEFINES}#define _GNU_SOURCE\n"
 286    #OS_DEFINES="${OS_DEFINES}#define _POSIX_C_SOURCE 200809L\n"
 287    #OS_DEFINES="${OS_DEFINES}#define _XOPEN_SOURCE 700\n"
 288    #[ ${OS} = darwin ] && OS_DEFINES="${OS_DEFINES}#define _DARWIN_C_SOURCE\n"
 289
 290    # On pkgsrc(7) systems automatically add /usr/pkg/*
 291    if [ -d /usr/pkg ]; then
 292       C_INCLUDE_PATH=/usr/pkg/include:${C_INCLUDE_PATH}
 293       LD_LIBRARY_PATH=/usr/pkg/lib:${LD_LIBRARY_PATH}
 294    fi
 295 }
 296
 297 _os_setup_sunos() {
 298    C_INCLUDE_PATH=/usr/xpg4/include:${C_INCLUDE_PATH}
 299    LD_LIBRARY_PATH=/usr/xpg4/lib:${LD_LIBRARY_PATH}
 300
 301    # Include packages
 302    if [ -d /opt/csw ]; then
 303       C_INCLUDE_PATH=/opt/csw/include:${C_INCLUDE_PATH}
 304       LD_LIBRARY_PATH=/opt/csw/lib:${LD_LIBRARY_PATH}
 305    fi
 306
 307    OS_DEFINES="${OS_DEFINES}#define __EXTENSIONS__\n"
 308    #OS_DEFINES="${OS_DEFINES}#define _POSIX_C_SOURCE 200112L\n"
 309
 310    [ -n "${cksum}" ] || cksum=/opt/csw/gnu/cksum
 311    if [ -x "${cksum}" ]; then :; else
 312       msg 'ERROR: Not an executable program: %s' "${cksum}"
 313       msg 'ERROR:   We need a CRC-32 cksum(1), as specified in POSIX.'
 314       msg 'ERROR:   However, we do so only for tests.'
 315       msg 'ERROR:   If that is ok, set "cksum=/usr/bin/true", then rerun'
 316       config_exit 1
 317    fi
 318
 319    if feat_yes AUTOCC; then
 320       if command -v cc >/dev/null 2>&1; then
 321          CC=cc
 322          feat_yes DEBUG && _CFLAGS="-v -Xa -g" || _CFLAGS="-Xa -O"
 323
 324          CFLAGS="${_CFLAGS} ${EXTRA_CFLAGS}"
 325          LDFLAGS="${_LDFLAGS} ${EXTRA_LDFLAGS}"
 326          export CC CFLAGS LDFLAGS
 327          OPT_AUTOCC=0 had_want_autocc=1 need_R_ldflags=-R
 328       else
 329          # Assume gcc(1), which supports -R for compat
 330          cc_maxopt=2 force_no_stackprot=1 need_R_ldflags=-Wl,-R
 331       fi
 332    fi
 333 }
 334
 335 # Check out compiler ($CC) and -flags ($CFLAGS)
 336 cc_setup() {
 337    # Even though it belongs into cc_flags we will try to compile and link
 338    # something, so ensure we have a clean state regarding CFLAGS/LDFLAGS or
 339    # EXTRA_CFLAGS/EXTRA_LDFLAGS
 340    if feat_no AUTOCC; then
 341       _cc_default
 342       # Ensure those don't do any harm
 343       EXTRA_CFLAGS= EXTRA_LDFLAGS=
 344       export EXTRA_CFLAGS EXTRA_LDFLAGS
 345       return
 346    else
 347       CFLAGS= LDFLAGS=
 348       export CFLAGS LDFLAGS
 349    fi
 350
 351    [ -n "${CC}" ] && [ "${CC}" != cc ] && { _cc_default; return; }
 352
 353    msg_nonl 'Searching for a usable C compiler .. $CC='
 354    if { i="`command -v clang`"; }; then
 355       CC=${i}
 356    elif { i="`command -v gcc`"; }; then
 357       CC=${i}
 358    elif { i="`command -v c99`"; }; then
 359       CC=${i}
 360    elif { i="`command -v tcc`"; }; then
 361       CC=${i}
 362    elif { i="`command -v pcc`"; }; then
 363       CC=${i}
 364    else
 365       if [ "${CC}" = cc ]; then
 366          :
 367       elif { i="`command -v c89`"; }; then
 368          CC=${i}
 369       else
 370          msg 'boing booom tschak'
 371          msg 'ERROR: I cannot find a compiler!'
 372          msg ' Neither of clang(1), gcc(1), tcc(1), pcc(1), c89(1) and c99(1).'
 373          msg ' Please set ${CC} environment variable, maybe ${CFLAGS}, rerun.'
 374          config_exit 1
 375       fi
 376    fi
 377    msg '%s' "${CC}"
 378    export CC
 379 }
 380
 381 _cc_default() {
 382    if [ -z "${CC}" ]; then
 383       msg 'To go on like you have chosen, please set $CC, rerun.'
 384       config_exit 1
 385    fi
 386
 387    if [ -z "${VERBOSE}" ] && [ -f ${lst} ] && feat_no DEBUG; then
 388       :
 389    else
 390       msg 'Using C compiler ${CC}=%s' "${CC}"
 391    fi
 392 }
 393
 394 cc_flags() {
 395    if feat_yes AUTOCC; then
 396       if [ -f ${lst} ] && feat_no DEBUG && [ -z "${VERBOSE}" ]; then
 397          cc_check_silent=1
 398          msg 'Detecting ${CFLAGS}/${LDFLAGS} for ${CC}=%s, just a second..' \
 399             "${CC}"
 400       else
 401          cc_check_silent=
 402          msg 'Testing usable ${CFLAGS}/${LDFLAGS} for ${CC}=%s' "${CC}"
 403       fi
 404
 405       i=`echo "${CC}" | ${awk} 'BEGIN{FS="/"}{print $NF}'`
 406       if { echo "${i}" | ${grep} tcc; } >/dev/null 2>&1; then
 407          msg ' . have special tcc(1) environmental rules ...'
 408          _cc_flags_tcc
 409       else
 410          # As of pcc CVS 2016-04-02, stack protection support is announced but
 411          # will break if used on Linux
 412          if { echo "${i}" | ${grep} pcc; } >/dev/null 2>&1; then
 413             force_no_stackprot=1
 414          fi
 415          _cc_flags_generic
 416       fi
 417
 418       feat_no DEBUG && _CFLAGS="-DNDEBUG ${_CFLAGS}"
 419       CFLAGS="${_CFLAGS} ${EXTRA_CFLAGS}"
 420       LDFLAGS="${_LDFLAGS} ${EXTRA_LDFLAGS}"
 421    else
 422       if feat_no DEBUG; then
 423          CFLAGS="-DNDEBUG ${CFLAGS}"
 424       fi
 425    fi
 426    msg ''
 427    export CFLAGS LDFLAGS
 428 }
 429
 430 _cc_flags_tcc() {
 431    __cflags=${_CFLAGS} __ldflags=${_LDFLAGS}
 432    _CFLAGS= _LDFLAGS=
 433
 434    cc_check -Wall
 435    cc_check -Wextra
 436    cc_check -pedantic
 437
 438    if feat_yes DEBUG; then
 439       # May have problems to find libtcc cc_check -b
 440       cc_check -g
 441    fi
 442
 443    if ld_check -Wl,-rpath =./ no; then
 444       need_R_ldflags=-Wl,-rpath=
 445       ld_check -Wl,--enable-new-dtags
 446       ld_runtime_flags # update!
 447    fi
 448
 449    _CFLAGS="${_CFLAGS} ${__cflags}" _LDFLAGS="${_LDFLAGS} ${__ldflags}"
 450    unset __cflags __ldflags
 451 }
 452
 453 _cc_flags_generic() {
 454    __cflags=${_CFLAGS} __ldflags=${_LDFLAGS}
 455    _CFLAGS= _LDFLAGS=
 456    feat_yes DEVEL && cc_check -std=c89 || cc_check -std=c99
 457
 458    if [ ${cc_maxopt} -gt 1 ] && feat_yes NOMEMDBG ||
 459          feat_yes ASAN_ADDRESS || feat_yes ASAN_MEMORY; then
 460       msg 'OP_NOMEMDBG or OPT_ASAN_{ADDRESS,MEMORY}, setting cc_maxopt=1 (-O1)'
 461       cc_maxopt=1
 462    fi
 463    # Check -g first since some others may rely upon -g / optim. level
 464    if feat_yes DEBUG; then
 465       cc_check -O
 466       cc_check -g
 467    elif [ ${cc_maxopt} -gt 2 ] && cc_check -O3; then
 468       :
 469    elif [ ${cc_maxopt} -gt 1 ] && cc_check -O2; then
 470       :
 471    elif [ ${cc_maxopt} -gt 0 ] && cc_check -O1; then
 472       :
 473    else
 474       cc_check -O
 475    fi
 476
 477    if feat_yes AMALGAMATION; then
 478       cc_check -pipe
 479    fi
 480
 481    #if feat_yes DEVEL && cc_check -Weverything; then
 482    #   :
 483    #else
 484       cc_check -Wall
 485       cc_check -Wextra
 486       cc_check -Wbad-function-cast
 487       cc_check -Wcast-align
 488       cc_check -Wcast-qual
 489       cc_check -Winit-self
 490       cc_check -Wmissing-prototypes
 491       cc_check -Wshadow
 492       cc_check -Wunused
 493       cc_check -Wwrite-strings
 494       cc_check -Wno-long-long
 495    #fi
 496    cc_check -pedantic
 497
 498    if feat_yes AMALGAMATION && feat_no DEVEL; then
 499       cc_check -Wno-unused-function
 500    fi
 501    feat_no DEVEL && cc_check -Wno-unused-result # XXX do right way (pragma too)
 502
 503    cc_check -fno-unwind-tables
 504    cc_check -fno-asynchronous-unwind-tables
 505    cc_check -fstrict-aliasing
 506    if cc_check -fstrict-overflow && feat_yes DEVEL; then
 507       cc_check -Wstrict-overflow=5
 508    fi
 509
 510    if feat_yes DEBUG || feat_yes FORCED_STACKPROT; then
 511       if [ -z "${force_no_stackprot}" ]; then
 512          if cc_check -fstack-protector-strong ||
 513                cc_check -fstack-protector-all; then
 514             cc_check -D_FORTIFY_SOURCE=2
 515          fi
 516       else
 517          msg 'Not checking for -fstack-protector compiler option,'
 518          msg 'since that caused errors in a "similar" configuration.'
 519          msg 'You may turn off OPT_AUTOCC and use your own settings, rerun'
 520       fi
 521    fi
 522
 523    # LD (+ dependend CC)
 524
 525    if feat_yes ASAN_ADDRESS; then
 526       _ccfg=${_CFLAGS}
 527       if cc_check -fsanitize=address &&
 528             ld_check -fsanitize=address; then
 529          :
 530       else
 531          feat_bail_required ASAN_ADDRESS
 532          _CFLAGS=${_ccfg}
 533       fi
 534    fi
 535
 536    if feat_yes ASAN_MEMORY; then
 537       _ccfg=${_CFLAGS}
 538       if cc_check -fsanitize=memory &&
 539             ld_check -fsanitize=memory &&
 540             cc_check -fsanitize-memory-track-origins=2 &&
 541             ld_check -fsanitize-memory-track-origins=2; then
 542          :
 543       else
 544          feat_bail_required ASAN_MEMORY
 545          _CFLAGS=${_ccfg}
 546       fi
 547    fi
 548
 549    ld_check -Wl,-z,relro
 550    ld_check -Wl,-z,now
 551    ld_check -Wl,-z,noexecstack
 552    if ld_check -Wl,-rpath =./ no; then
 553       need_R_ldflags=-Wl,-rpath=
 554       # Choose DT_RUNPATH (after $LD_LIBRARY_PATH) over DT_RPATH (before)
 555       ld_check -Wl,--enable-new-dtags
 556       ld_runtime_flags # update!
 557    elif ld_check -Wl,-R ./ no; then
 558       need_R_ldflags=-Wl,-R
 559       ld_check -Wl,--enable-new-dtags
 560       ld_runtime_flags # update!
 561    fi
 562
 563    # Address randomization
 564    _ccfg=${_CFLAGS}
 565    if cc_check -fPIE || cc_check -fpie; then
 566       ld_check -pie || _CFLAGS=${_ccfg}
 567    fi
 568    unset _ccfg
 569
 570    _CFLAGS="${_CFLAGS} ${__cflags}" _LDFLAGS="${_LDFLAGS} ${__ldflags}"
 571    unset __cflags __ldflags
 572 }
 573
 574 ##  --  >8  - <<OS/CC | SUPPORT FUNS>> -  8<  --  ##
 575
 576 ## Notes:
 577 ## - Heirloom sh(1) (and same origin) have _sometimes_ problems with ': >'
 578 ##   redirection, so use "printf '' >" instead
 579
 580 ## Very first: we undergo several states regarding I/O redirection etc.,
 581 ## but need to deal with option updates from within all.  Since all the
 582 ## option stuff should be above the scissor line, define utility functions
 583 ## and redefine them as necessary.
 584 ## And, since we have those functions, simply use them for whatever
 585
 586 config_exit() {
 587    exit ${1}
 588 }
 589
 590 msg() {
 591    fmt=${1}
 592    shift
 593    printf >&2 -- "${fmt}\\n" "${@}"
 594 }
 595
 596 msg_nonl() {
 597    fmt=${1}
 598    shift
 599    printf >&2 -- "${fmt}" "${@}"
 600 }
 601
 602 t1=ten10one1ten10one1
 603 if ( [ ${t1##*ten10} = one1 ] && [ ${t1#*ten10} = one1ten10one1 ] &&
 604       [ ${t1%%one1*} = ten10 ] && [ ${t1%one1*} = ten10one1ten10 ]
 605       ) > /dev/null 2>&1; then
 606    good_shell=1
 607 else
 608    unset good_shell
 609 fi
 610 unset t1
 611
 612 # We need some standard utilities
 613 unset -f command
 614 check_tool() {
 615    n=${1} i=${2} opt=${3:-0}
 616    # Evaluate, just in case user comes in with shell snippets (..well..)
 617    eval i="${i}"
 618    if type "${i}" >/dev/null 2>&1; then # XXX why have i type not command -v?
 619       [ -n "${VERBOSE}" ] && msg ' . ${%s} ... %s' "${n}" "${i}"
 620       eval ${n}=${i}
 621       return 0
 622    fi
 623    if [ ${opt} -eq 0 ]; then
 624       msg 'ERROR: no trace of utility %s' "${n}"
 625       config_exit 1
 626    fi
 627    return 1
 628 }
 629
 630 # Our feature check environment
 631 feat_val_no() {
 632    [ "x${1}" = x0 ] || [ "x${1}" = xn ] ||
 633    [ "x${1}" = xfalse ] || [ "x${1}" = xno ] || [ "x${1}" = xoff ]
 634 }
 635
 636 feat_val_yes() {
 637    [ "x${1}" = x1 ] || [ "x${1}" = xy ] ||
 638    [ "x${1}" = xtrue ] || [ "x${1}" = xyes ] || [ "x${1}" = xon ] ||
 639          [ "x${1}" = xrequire ]
 640 }
 641
 642 feat_val_require() {
 643    [ "x${1}" = xrequire ]
 644 }
 645
 646 _feat_check() {
 647    eval i=\$OPT_${1}
 648    i="`echo ${i} | ${tr} '[A-Z]' '[a-z]'`"
 649    if feat_val_no "${i}"; then
 650       return 1
 651    elif feat_val_yes "${i}"; then
 652       return 0
 653    else
 654       msg "ERROR: %s: 0/n/false/no/off or 1/y/true/yes/on/require, got: %s" \
 655          "${1}" "${i}"
 656       config_exit 11
 657    fi
 658 }
 659
 660 feat_yes() {
 661    _feat_check ${1}
 662 }
 663
 664 feat_no() {
 665    _feat_check ${1} && return 1
 666    return 0
 667 }
 668
 669 feat_require() {
 670    eval i=\$OPT_${1}
 671    i="`echo ${i} | ${tr} '[A-Z]' '[a-z]'`"
 672    [ "x${i}" = xrequire ] || [ "x${i}" = xrequired ]
 673 }
 674
 675 feat_bail_required() {
 676    if feat_require ${1}; then
 677       msg 'ERROR: feature OPT_%s is required but not available' "${1}"
 678       config_exit 13
 679    fi
 680    eval OPT_${1}=0
 681    option_update # XXX this is rather useless here (dependency chain..)
 682 }
 683
 684 option_parse() {
 685    # Parse one of our XOPTIONS* in $2 and assign the sh(1) compatible list of
 686    # options, without documentation, to $1
 687    j=\'
 688    i="`${awk} -v input=\"${2}\" '
 689       BEGIN{
 690          for(i = 0;;){
 691             voff = match(input, /[[:alnum:]_]+(='${j}'[^'${j}']+)?/)
 692             if(voff == 0)
 693                break
 694             v = substr(input, voff, RLENGTH)
 695             input = substr(input, voff + RLENGTH)
 696             doff = index(v, "=")
 697             if(doff > 0){
 698                d = substr(v, doff + 2, length(v) - doff - 1)
 699                v = substr(v, 1, doff - 1)
 700             }
 701             print v
 702          }
 703       }
 704       '`"
 705    eval ${1}=\"${i}\"
 706 }
 707
 708 option_doc_of() {
 709    # Return the "documentation string" for option $1, itself if none such
 710    j=\'
 711    ${awk} -v want="${1}" \
 712       -v input="${XOPTIONS_DETECT}${XOPTIONS}${XOPTIONS_XTRA}" '
 713    BEGIN{
 714       for(;;){
 715          voff = match(input, /[[:alnum:]_]+(='${j}'[^'${j}']+)?/)
 716          if(voff == 0)
 717             break
 718          v = substr(input, voff, RLENGTH)
 719          input = substr(input, voff + RLENGTH)
 720          doff = index(v, "=")
 721          if(doff > 0){
 722             d = substr(v, doff + 2, length(v) - doff - 1)
 723             v = substr(v, 1, doff - 1)
 724          }else
 725             d = v
 726          if(v == want){
 727             if(d != "-")
 728                print d
 729             exit
 730          }
 731       }
 732    }
 733    '
 734 }
 735
 736 option_join_rc() {
 737    # Join the values from make.rc into what currently is defined, not
 738    # overwriting yet existing settings
 739    ${rm} -f ${tmp}
 740    # We want read(1) to perform reverse solidus escaping in order to be able to
 741    # use multiline values in make.rc; the resulting sh(1)/sed(1) code was very
 742    # slow in VMs (see [fa2e248]), Aharon Robbins suggested the following
 743    < ${rc} ${awk} 'BEGIN{line = ""}{
 744       gsub(/^[[:space:]]+/, "", $0)
 745       gsub(/[[:space:]]+$/, "", $0)
 746       if(gsub(/\\$/, "", $0)){
 747          line = line $0
 748          next
 749       }else
 750          line = line $0
 751       if(index(line, "#") == 1){
 752          line = ""
 753       }else if(length(line)){
 754          print line
 755          line = ""
 756       }
 757    }' |
 758    while read line; do
 759       if [ -n "${good_shell}" ]; then
 760          i=${line%%=*}
 761       else
 762          i=`${awk} -v LINE="${line}" 'BEGIN{
 763             gsub(/=.*$/, "", LINE)
 764             print LINE
 765          }'`
 766       fi
 767       if [ "${i}" = "${line}" ]; then
 768          msg 'ERROR: invalid syntax in: %s' "${line}"
 769          continue
 770       fi
 771
 772       eval j="\$${i}" jx="\${${i}+x}"
 773       if [ -n "${j}" ] || [ "${jx}" = x ]; then
 774          : # Yet present
 775       else
 776          j=`${awk} -v LINE="${line}" 'BEGIN{
 777             gsub(/^[^=]*=/, "", LINE)
 778             gsub(/^\"*/, "", LINE)
 779             gsub(/\"*$/, "", LINE)
 780             print LINE
 781          }'`
 782       fi
 783       [ "${i}" = "DESTDIR" ] && continue
 784       echo "${i}=\"${j}\""
 785    done > ${tmp}
 786    # Reread the mixed version right now
 787    . ./${tmp}
 788 }
 789
 790 option_evaluate() {
 791    # Expand the option values, which may contain shell snippets
 792    ${rm} -f ${newlst} ${newmk} ${newh}
 793    exec 5<&0 6>&1 <${tmp} >${newlst}
 794    while read line; do
 795       z=
 796       if [ -n "${good_shell}" ]; then
 797          i=${line%%=*}
 798          [ "${i}" != "${i#OPT_}" ] && z=1
 799       else
 800          i=`${awk} -v LINE="${line}" 'BEGIN{
 801             gsub(/=.*$/, "", LINE);\
 802             print LINE
 803          }'`
 804          if echo "${i}" | ${grep} '^OPT_' >/dev/null 2>&1; then
 805             z=1
 806          fi
 807       fi
 808
 809       eval j=\$${i}
 810       if [ -n "${z}" ]; then
 811          j="`echo ${j} | ${tr} '[A-Z]' '[a-z]'`"
 812          if [ -z "${j}" ] || feat_val_no "${j}"; then
 813             j=0
 814             printf "   /* #undef ${i} */\n" >> ${newh}
 815          elif feat_val_yes "${j}"; then
 816             if feat_val_require "${j}"; then
 817                j=require
 818             else
 819                j=1
 820             fi
 821             printf "   /* #define ${i} */\n" >> ${newh}
 822          else
 823             msg 'ERROR: cannot parse <%s>' "${line}"
 824             config_exit 1
 825          fi
 826       else
 827          printf "#define ${i} \"${j}\"\n" >> ${newh}
 828       fi
 829       printf "${i} = ${j}\n" >> ${newmk}
 830       printf "${i}=${j}\n"
 831       eval "${i}=\"${j}\""
 832    done
 833    exec 0<&5 1>&6 5<&- 6<&-
 834 }
 835
 836 path_check() {
 837    # "path_check VARNAME" or "path_check VARNAME FLAG VARNAME"
 838    varname=${1} addflag=${2} flagvarname=${3}
 839    j=${IFS}
 840    IFS=:
 841    eval "set -- \$${1}"
 842    IFS=${j}
 843    j= k= y= z=
 844    for i
 845    do
 846       [ -z "${i}" ] && continue
 847       [ -d "${i}" ] || continue
 848       if [ -n "${j}" ]; then
 849          if { z=${y}; echo "${z}"; } | ${grep} ":${i}:" >/dev/null 2>&1; then
 850             :
 851          else
 852             y="${y} :${i}:"
 853             j="${j}:${i}"
 854             # But do not link any fakeroot path into our binaries!
 855             if [ -n "${addflag}" ]; then
 856                case "${i}" in *fakeroot*) continue;; esac
 857                k="${k} ${addflag}${i}"
 858             fi
 859          fi
 860       else
 861          y=" :${i}:"
 862          j="${i}"
 863          # But do not link any fakeroot path into our binaries!
 864          if [ -n "${addflag}" ]; then
 865             case "${i}" in *fakeroot*) continue;; esac
 866             k="${k} ${addflag}${i}"
 867          fi
 868       fi
 869    done
 870    eval "${varname}=\"${j}\""
 871    [ -n "${addflag}" ] && eval "${flagvarname}=\"${k}\""
 872    unset varname
 873 }
 874
 875 ld_runtime_flags() {
 876    if [ -n "${need_R_ldflags}" ]; then
 877       i=${IFS}
 878       IFS=:
 879       set -- ${LD_LIBRARY_PATH}
 880       IFS=${i}
 881       for i
 882       do
 883          # But do not link any fakeroot path into our binaries!
 884          case "${i}" in *fakeroot*) continue;; esac
 885          LDFLAGS="${LDFLAGS} ${need_R_ldflags}${i}"
 886          _LDFLAGS="${_LDFLAGS} ${need_R_ldflags}${i}"
 887       done
 888       export LDFLAGS
 889    fi
 890    # Disable it for a possible second run.
 891    need_R_ldflags=
 892 }
 893
 894 cc_check() {
 895    [ -n "${cc_check_silent}" ] || msg_nonl ' . CC %s .. ' "${1}"
 896    if "${CC}" ${INCS} \
 897          ${_CFLAGS} ${1} ${EXTRA_CFLAGS} ${_LDFLAGS} ${EXTRA_LDFLAGS} \
 898          -o ${tmp2} ${tmp}.c ${LIBS} >/dev/null 2>&1; then
 899       _CFLAGS="${_CFLAGS} ${1}"
 900       [ -n "${cc_check_silent}" ] || msg 'yes'
 901       return 0
 902    fi
 903    [ -n "${cc_check_silent}" ] || msg 'no'
 904    return 1
 905 }
 906
 907 ld_check() {
 908    # $1=option [$2=option argument] [$3=if set, shall NOT be added to _LDFLAGS]
 909    [ -n "${cc_check_silent}" ] || msg_nonl ' . LD %s .. ' "${1}"
 910    if "${CC}" ${INCS} ${_CFLAGS} ${_LDFLAGS} ${1}${2} ${EXTRA_LDFLAGS} \
 911          -o ${tmp2} ${tmp}.c ${LIBS} >/dev/null 2>&1; then
 912       [ -n "${3}" ] || _LDFLAGS="${_LDFLAGS} ${1}"
 913       [ -n "${cc_check_silent}" ] || msg 'yes'
 914       return 0
 915    fi
 916    [ -n "${cc_check_silent}" ] || msg 'no'
 917    return 1
 918 }
 919
 920 _check_preface() {
 921    variable=$1 topic=$2 define=$3
 922
 923    echo '**********'
 924    msg_nonl ' . %s ... ' "${topic}"
 925    echo "/* checked ${topic} */" >> ${h}
 926    ${rm} -f ${tmp} ${tmp}.o
 927    echo '*** test program is'
 928    { echo '#include <'"${h_name}"'>'; cat; } | ${tee} ${tmp}.c
 929    #echo '*** the preprocessor generates'
 930    #${make} -f ${makefile} ${tmp}.x
 931    #${cat} ${tmp}.x
 932    echo '*** results are'
 933 }
 934
 935 without_check() {
 936    yesno=$1 variable=$2 topic=$3 define=$4 libs=$5 incs=$6
 937
 938    echo '**********'
 939    msg_nonl ' . %s ... ' "${topic}"
 940
 941    echo '*** enforced unchecked results are'
 942    if feat_val_yes ${yesno}; then
 943       if [ -n "${incs}" ] || [ -n "${libs}" ]; then
 944          echo "*** adding INCS<${incs}> LIBS<${libs}>"
 945          LIBS="${LIBS} ${libs}"
 946          echo "${libs}" >> ${lib}
 947          INCS="${INCS} ${incs}"
 948          echo "${incs}" >> ${inc}
 949       fi
 950       msg 'yes (deduced)'
 951       echo "${define}" >> ${h}
 952       eval have_${variable}=yes
 953       return 0
 954    else
 955       echo "/* ${define} */" >> ${h}
 956       msg 'no (deduced)'
 957       eval unset have_${variable}
 958       return 1
 959    fi
 960 }
 961
 962 compile_check() {
 963    variable=$1 topic=$2 define=$3
 964
 965    _check_preface "${variable}" "${topic}" "${define}"
 966
 967    if ${make} -f ${makefile} XINCS="${INCS}" \
 968             CFLAGS="${CFLAGS}" LDFLAGS="${LDFLAGS}" \
 969             ./${tmp}.o &&
 970          [ -f ./${tmp}.o ]; then
 971       msg 'yes'
 972       echo "${define}" >> ${h}
 973       eval have_${variable}=yes
 974       return 0
 975    else
 976       echo "/* ${define} */" >> ${h}
 977       msg 'no'
 978       eval unset have_${variable}
 979       return 1
 980    fi
 981 }
 982
 983 _link_mayrun() {
 984    run=$1 variable=$2 topic=$3 define=$4 libs=$5 incs=$6
 985
 986    _check_preface "${variable}" "${topic}" "${define}"
 987
 988    if feat_yes CROSS_BUILD; then
 989       if [ ${run} = 1 ]; then
 990          run=0
 991       fi
 992    fi
 993
 994    if ${make} -f ${makefile} XINCS="${INCS} ${incs}" \
 995             CFLAGS="${CFLAGS}" LDFLAGS="${LDFLAGS}" \
 996             XLIBS="${LIBS} ${libs}" \
 997             ./${tmp} &&
 998          [ -f ./${tmp} ] &&
 999          { [ ${run} -eq 0 ] || ./${tmp}; }; then
1000       echo "*** adding INCS<${incs}> LIBS<${libs}>; executed: ${run}"
1001       msg 'yes'
1002       echo "${define}" >> ${h}
1003       LIBS="${LIBS} ${libs}"
1004       echo "${libs}" >> ${lib}
1005       INCS="${INCS} ${incs}"
1006       echo "${incs}" >> ${inc}
1007       eval have_${variable}=yes
1008       return 0
1009    else
1010       msg 'no'
1011       echo "/* ${define} */" >> ${h}
1012       eval unset have_${variable}
1013       return 1
1014    fi
1015 }
1016
1017 link_check() {
1018    _link_mayrun 0 "${1}" "${2}" "${3}" "${4}" "${5}"
1019 }
1020
1021 run_check() {
1022    _link_mayrun 1 "${1}" "${2}" "${3}" "${4}" "${5}"
1023 }
1024
1025 xrun_check() {
1026    _link_mayrun 2 "${1}" "${2}" "${3}" "${4}" "${5}"
1027 }
1028
1029 feat_def() {
1030    if feat_yes ${1}; then
1031       echo '#define HAVE_'${1}'' >> ${h}
1032       return 0
1033    else
1034       echo '/* OPT_'${1}'=0 */' >> ${h}
1035       return 1
1036    fi
1037 }
1038
1039 squeeze_em() {
1040    < "${1}" > "${2}" ${awk} \
1041    'BEGIN {ORS = " "} /^[^#]/ {print} {next} END {ORS = ""; print "\n"}'
1042 }
1043
1044 ##  --  >8  - <<SUPPORT FUNS | RUNNING>> -  8<  --  ##
1045
1046 # First of all, create new configuration and check whether it changed
1047
1048 # Very easy checks for the operating system in order to be able to adjust paths
1049 # or similar very basic things which we need to be able to go at all
1050 os_early_setup
1051
1052 # Check those tools right now that we need before including $rc
1053 msg 'Checking for basic utility set'
1054 check_tool awk "${awk:-`command -v awk`}"
1055 check_tool rm "${rm:-`command -v rm`}"
1056 check_tool tr "${tr:-`command -v tr`}"
1057
1058 # Initialize the option set
1059 msg_nonl 'Setting up configuration options ... '
1060 option_setup
1061 msg 'done'
1062
1063 # Include $rc, but only take from it what wasn't overwritten by the user from
1064 # within the command line or from a chosen fixed CONFIG=
1065 # Note we leave alone the values
1066 trap "exit 1" HUP INT TERM
1067 trap "${rm} -f ${tmp}" EXIT
1068
1069 msg_nonl 'Joining in %s ... ' ${rc}
1070 option_join_rc
1071 msg 'done'
1072
1073 # We need to know about that now, in order to provide utility overwrites etc.
1074 os_setup
1075
1076 msg 'Checking for remaining set of utilities'
1077 check_tool grep "${grep:-`command -v grep`}"
1078
1079 # Before we step ahead with the other utilities perform a path cleanup first.
1080 path_check PATH
1081
1082 # awk(1) above
1083 check_tool basename "${basename:-`command -v basename`}"
1084 check_tool cat "${cat:-`command -v cat`}"
1085 check_tool chmod "${chmod:-`command -v chmod`}"
1086 check_tool cp "${cp:-`command -v cp`}"
1087 check_tool cmp "${cmp:-`command -v cmp`}"
1088 # grep(1) above
1089 check_tool mkdir "${mkdir:-`command -v mkdir`}"
1090 check_tool mv "${mv:-`command -v mv`}"
1091 # rm(1) above
1092 check_tool sed "${sed:-`command -v sed`}"
1093 check_tool sort "${sort:-`command -v sort`}"
1094 check_tool tee "${tee:-`command -v tee`}"
1095
1096 check_tool chown "${chown:-`command -v chown`}" 1 ||
1097    check_tool chown "/sbin/chown" 1 ||
1098    check_tool chown "/usr/sbin/chown"
1099
1100 check_tool make "${MAKE:-`command -v make`}"
1101 MAKE=${make}
1102 check_tool strip "${STRIP:-`command -v strip`}" 1 &&
1103    HAVE_STRIP=1 || HAVE_STRIP=0
1104
1105 # For ./cc-test.sh only
1106 check_tool cksum "${cksum:-`command -v cksum`}"
1107
1108 # Update OPT_ options now, in order to get possible inter-dependencies right
1109 option_update
1110
1111 # (No functions since some shells loose non-exported variables in traps)
1112 trap "trap \"\" HUP INT TERM; exit 1" HUP INT TERM
1113 trap "trap \"\" HUP INT TERM EXIT;\
1114    ${rm} -rf ${newlst} ${tmp0}.* ${tmp0}* ${newmk} ${newev} ${newh}" EXIT
1115
1116 # Our configuration options may at this point still contain shell snippets,
1117 # we need to evaluate them in order to get them expanded, and we need those
1118 # evaluated values not only in our new configuration file, but also at hand..
1119 msg_nonl 'Evaluating all configuration items ... '
1120 option_evaluate
1121 msg 'done'
1122
1123 # Add the known utility and some other variables
1124 printf "#define VAL_UAGENT \"${VAL_SID}${VAL_MAILX}\"\n" >> ${newh}
1125 printf "VAL_UAGENT = ${VAL_SID}${VAL_MAILX}\n" >> ${newmk}
1126
1127 printf "#define VAL_PRIVSEP \"${VAL_SID}${VAL_MAILX}-privsep\"\n" >> ${newh}
1128 printf "VAL_PRIVSEP = \$(VAL_UAGENT)-privsep\n" >> ${newmk}
1129 if feat_yes DOTLOCK; then
1130    printf "OPTIONAL_PRIVSEP = \$(VAL_PRIVSEP)\n" >> ${newmk}
1131 else
1132    printf "OPTIONAL_PRIVSEP =\n" >> ${newmk}
1133 fi
1134
1135 for i in \
1136       SRCDIR \
1137       awk basename cat chmod chown cp cmp grep mkdir mv rm sed sort tee tr \
1138       MAKE MAKEFLAGS make SHELL strip \
1139       cksum; do
1140    eval j=\$${i}
1141    printf "${i} = ${j}\n" >> ${newmk}
1142    printf "${i}=${j}\n" >> ${newlst}
1143    printf "${i}=\"${j}\";export ${i}; " >> ${newev}
1144 done
1145 printf "\n" >> ${newev}
1146
1147 # Build a basic set of INCS and LIBS according to user environment.
1148 C_INCLUDE_PATH="./:${SRCDIR}:${C_INCLUDE_PATH}"
1149 path_check C_INCLUDE_PATH -I _INCS
1150 INCS="${INCS} ${_INCS}"
1151 path_check LD_LIBRARY_PATH -L _LIBS
1152 LIBS="${LIBS} ${_LIBS}"
1153 unset _INCS _LIBS
1154 export C_INCLUDE_PATH LD_LIBRARY_PATH
1155
1156 # Some environments need runtime path flags to be able to go at all
1157 ld_runtime_flags
1158
1159 ## Detect CC, whether we can use it, and possibly which CFLAGS we can use
1160
1161 cc_setup
1162
1163 ${cat} > ${tmp}.c << \!
1164 #include <stdio.h>
1165 #include <string.h>
1166 static void doit(char const *s);
1167 int
1168 main(int argc, char **argv){
1169    (void)argc;
1170    (void)argv;
1171    doit("Hello world");
1172    return 0;
1173 }
1174 static void
1175 doit(char const *s){
1176    char buf[12];
1177    memcpy(buf, s, strlen(s) +1);
1178    puts(s);
1179 }
1180 !
1181
1182 if "${CC}" ${INCS} ${CFLAGS} ${EXTRA_CFLAGS} ${LDFLAGS} ${EXTRA_LDFLAGS} \
1183       -o ${tmp2} ${tmp}.c ${LIBS}; then
1184    :
1185 else
1186    msg 'ERROR: i cannot compile a "Hello world" via'
1187    msg '   %s' \
1188    "${CC} ${INCS} ${CFLAGS} ${EXTRA_CFLAGS} ${LDFLAGS} ${EXTRA_LDFLAGS} ${LIBS}"
1189    msg 'ERROR:   Please read INSTALL, rerun'
1190    config_exit 1
1191 fi
1192
1193 # This may also update ld_runtime_flags() (again)
1194 cc_flags
1195
1196 for i in \
1197       INCS LIBS \
1198       ; do
1199    eval j=\$${i}
1200    printf -- "${i}=${j}\n" >> ${newlst}
1201 done
1202 for i in \
1203       CC \
1204       CFLAGS \
1205       LDFLAGS \
1206       PATH C_INCLUDE_PATH LD_LIBRARY_PATH \
1207       OSFULLSPEC \
1208       ; do
1209    eval j=\$${i}
1210    printf -- "${i} = ${j}\n" >> ${newmk}
1211    printf -- "${i}=${j}\n" >> ${newlst}
1212 done
1213
1214 # Now finally check whether we already have a configuration and if so, whether
1215 # all those parameters are still the same.. or something has actually changed
1216 if [ -f ${lst} ] && ${cmp} ${newlst} ${lst} >/dev/null 2>&1; then
1217    echo 'Configuration is up-to-date'
1218    exit 0
1219 elif [ -f ${lst} ]; then
1220    echo 'Configuration has been updated..'
1221    ( eval "${MAKE} -f ./mk-config.mk clean" )
1222    echo
1223 else
1224    echo 'Shiny configuration..'
1225 fi
1226
1227 # Time to redefine helper 1
1228 config_exit() {
1229    ${rm} -f ${lst} ${h} ${mk}
1230    exit ${1}
1231 }
1232
1233 ${mv} -f ${newlst} ${lst}
1234 ${mv} -f ${newev} ${ev}
1235 ${mv} -f ${newh} ${h}
1236 ${mv} -f ${newmk} ${mk}
1237
1238 if [ -z "${VERBOSE}" ]; then
1239    printf -- "ECHO_CC = @echo '  'CC \$(@);\n" >> ${mk}
1240    printf -- "ECHO_LINK = @echo '  'LINK \$(@);\n" >> ${mk}
1241    printf -- "ECHO_GEN = @echo '  'GEN \$(@);\n" >> ${mk}
1242    printf -- "ECHO_TEST = @\n" >> ${mk}
1243    printf -- "ECHO_CMD = @echo '  CMD';\n" >> ${mk}
1244    printf -- "ECHO_BLOCK_BEGIN = @( \n" >> ${mk}
1245    printf -- "ECHO_BLOCK_END = ) >/dev/null\n" >> ${mk}
1246 fi
1247
1248 ## Compile and link checking
1249
1250 tmp3=./${tmp0}3$$
1251 log=./mk-config.log
1252 lib=./mk-config.lib
1253 inc=./mk-config.inc
1254 makefile=./${tmp0}.mk
1255
1256 # (No function since some shells loose non-exported variables in traps)
1257 trap "trap \"\" HUP INT TERM;\
1258    ${rm} -f ${lst} ${h} ${mk} ${lib} ${inc}; exit 1" HUP INT TERM
1259 trap "trap \"\" HUP INT TERM EXIT;\
1260    ${rm} -rf ${tmp0}.* ${tmp0}*" EXIT
1261
1262 # Time to redefine helper 2
1263 msg() {
1264    fmt=${1}
1265    shift
1266    printf "*** ${fmt}\\n" "${@}"
1267    printf -- "${fmt}\\n" "${@}" >&5
1268 }
1269 msg_nonl() {
1270    fmt=${1}
1271    shift
1272    printf "*** ${fmt}\\n" "${@}"
1273    printf -- "${fmt}" "${@}" >&5
1274 }
1275
1276 # !!
1277 exec 5>&2 > ${log} 2>&1
1278
1279 echo "${LIBS}" > ${lib}
1280 echo "${INCS}" > ${inc}
1281 ${cat} > ${makefile} << \!
1282 .SUFFIXES: .o .c .x .y
1283 .c.o:
1284         $(CC) -I./ $(XINCS) $(CFLAGS) -c $(<)
1285 .c.x:
1286         $(CC) -I./ $(XINCS) -E $(<) > $(@)
1287 .c:
1288         $(CC) -I./ $(XINCS) $(CFLAGS) $(LDFLAGS) -o $(@) $(<) $(XLIBS)
1289 !
1290
1291 ## Generics
1292
1293 # May be multiline..
1294 echo >> ${h}
1295 [ -n "${OS_DEFINES}" ] && printf -- "${OS_DEFINES}" >> ${h}
1296 echo '#define VAL_BUILD_OS "'"${OS}"'"' >> ${h}
1297 echo '#define VAL_BUILD_OSENV "'"${OSENV}"'"' >> ${h}
1298
1299 # Generate n_err_number OS mappings
1300 (
1301    feat_yes DEVEL && NV= || NV=noverbose
1302    SRCDIR="${SRCDIR}" TARGET="${h}" awk="${awk}" \
1303       ${SHELL} "${SRCDIR}"make-errors.sh ${NV} config
1304 ) |
1305    xrun_check oserrno 'OS error mapping table generated' || config_exit 1
1306
1307 feat_def ALWAYS_UNICODE_LOCALE
1308 feat_def AMALGAMATION
1309 feat_def CROSS_BUILD
1310 feat_def DOCSTRINGS
1311 feat_def ERRORS
1312
1313 feat_def ASAN_ADDRESS
1314 feat_def ASAN_MEMORY
1315 feat_def DEBUG
1316 feat_def DEVEL
1317 feat_def NYD2
1318 feat_def NOMEMDBG
1319
1320 if xrun_check inline 'inline functions' \
1321    '#define HAVE_INLINE
1322    #define n_INLINE static inline' << \!
1323 static inline int ilf(int i){return ++i;}
1324 int main(void){return ilf(-1);}
1325 !
1326 then
1327    :
1328 elif xrun_check inline 'inline functions (via __inline)' \
1329    '#define HAVE_INLINE
1330    #define n_INLINE static __inline' << \!
1331 static __inline int ilf(int i){return ++i;}
1332 int main(void){return ilf(-1);}
1333 !
1334 then
1335    :
1336 fi
1337
1338 ## Test for "basic" system-calls / functionality that is used by all parts
1339 ## of our program.  Once this is done fork away BASE_LIBS and other BASE_*
1340 ## macros to be used by only the subprograms (potentially).
1341
1342 if run_check clock_gettime 'clock_gettime(2)' \
1343    '#define HAVE_CLOCK_GETTIME' << \!
1344 #include <time.h>
1345 # include <errno.h>
1346 int main(void){
1347    struct timespec ts;
1348
1349    if(!clock_gettime(CLOCK_REALTIME, &ts) || errno != ENOSYS)
1350       return 0;
1351    return 1;
1352 }
1353 !
1354 then
1355    :
1356 elif run_check clock_gettime 'clock_gettime(2) (via -lrt)' \
1357    '#define HAVE_CLOCK_GETTIME' '-lrt' << \!
1358 #include <time.h>
1359 # include <errno.h>
1360 int main(void){
1361    struct timespec ts;
1362
1363    if(!clock_gettime(CLOCK_REALTIME, &ts) || errno != ENOSYS)
1364       return 0;
1365    return 1;
1366 }
1367 !
1368 then
1369    :
1370 elif run_check gettimeofday 'gettimeofday(2)' \
1371    '#define HAVE_GETTIMEOFDAY' << \!
1372 #include <stdio.h> /* For C89 NULL */
1373 #include <sys/time.h>
1374 # include <errno.h>
1375 int main(void){
1376    struct timeval tv;
1377
1378    if(!gettimeofday(&tv, NULL) || errno != ENOSYS)
1379       return 0;
1380    return 1;
1381 }
1382 !
1383 then
1384    :
1385 else
1386    have_no_subsecond_time=1
1387 fi
1388
1389 if run_check nanosleep 'nanosleep(2)' \
1390    '#define HAVE_NANOSLEEP' << \!
1391 #include <time.h>
1392 # include <errno.h>
1393 int main(void){
1394    struct timespec ts;
1395
1396    ts.tv_sec = 1;
1397    ts.tv_nsec = 100000;
1398    if(!nanosleep(&ts, NULL) || errno != ENOSYS)
1399       return 0;
1400    return 1;
1401 }
1402 !
1403 then
1404    :
1405 elif run_check nanosleep 'nanosleep(2) (via -lrt)' \
1406    '#define HAVE_NANOSLEEP' '-lrt' << \!
1407 #include <time.h>
1408 # include <errno.h>
1409 int main(void){
1410    struct timespec ts;
1411
1412    ts.tv_sec = 1;
1413    ts.tv_nsec = 100000;
1414    if(!nanosleep(&ts, NULL) || errno != ENOSYS)
1415       return 0;
1416    return 1;
1417 }
1418 !
1419 then
1420    :
1421 # link_check is enough for this, that function is so old, trust the proto
1422 elif link_check sleep 'sleep(3)' \
1423    '#define HAVE_SLEEP' << \!
1424 #include <unistd.h>
1425 # include <errno.h>
1426 int main(void){
1427    if(!sleep(1) || errno != ENOSYS)
1428       return 0;
1429    return 1;
1430 }
1431 !
1432 then
1433    :
1434 else
1435    msg 'ERROR: we require one of nanosleep(2) and sleep(3).'
1436    config_exit 1
1437 fi
1438
1439 if run_check userdb 'gete?[gu]id(2), getpwuid(3), getpwnam(3)' << \!
1440 #include <pwd.h>
1441 #include <unistd.h>
1442 # include <errno.h>
1443 int main(void){
1444    struct passwd *pw;
1445    gid_t gid;
1446    uid_t uid;
1447
1448    if((gid = getgid()) != 0)
1449       gid = getegid();
1450    if((uid = getuid()) != 0)
1451       uid = geteuid();
1452    if((pw = getpwuid(uid)) == NULL && errno == ENOSYS)
1453       return 1;
1454    if((pw = getpwnam("root")) == NULL && errno == ENOSYS)
1455       return 1;
1456    return 0;
1457 }
1458 !
1459 then
1460    :
1461 else
1462    msg 'ERROR: we require user and group info / database searches.'
1463    msg 'That much Unix we indulge ourselfs.'
1464    config_exit 1
1465 fi
1466
1467 if link_check ftruncate 'ftruncate(2)' \
1468    '#define HAVE_FTRUNCATE' << \!
1469 #include <unistd.h>
1470 #include <sys/types.h>
1471 int main(void){
1472    return (ftruncate(0, 0) != 0);
1473 }
1474 !
1475 then
1476    :
1477 else
1478    msg 'ERROR: we require the ftruncate(2) system call.'
1479    config_exit 1
1480 fi
1481
1482 if run_check sa_restart 'SA_RESTART (for sigaction(2))' << \!
1483 #include <signal.h>
1484 # include <errno.h>
1485 int main(void){
1486    struct sigaction nact, oact;
1487
1488    nact.sa_handler = SIG_DFL;
1489    sigemptyset(&nact.sa_mask);
1490    nact.sa_flags = SA_RESTART;
1491    return !(!sigaction(SIGCHLD, &nact, &oact) || errno != ENOSYS);
1492 }
1493 !
1494 then
1495    :
1496 else
1497    msg 'ERROR: we (yet) require the SA_RESTART flag for sigaction(2).'
1498    config_exit 1
1499 fi
1500
1501 if link_check snprintf 'snprintf(3)' << \!
1502 #include <stdio.h>
1503 int main(void){
1504    char b[20];
1505
1506    snprintf(b, sizeof b, "%s", "string");
1507    return 0;
1508 }
1509 !
1510 then
1511    :
1512 else
1513    msg 'ERROR: we require the snprintf(3) function.'
1514    config_exit 1
1515 fi
1516
1517 if link_check environ 'environ(3)' << \!
1518 #include <stdio.h> /* For C89 NULL */
1519 int main(void){
1520    extern char **environ;
1521
1522    return environ[0] == NULL;
1523 }
1524 !
1525 then
1526    :
1527 else
1528    msg 'ERROR: we require the environ(3) array for subprocess control.'
1529    config_exit 1
1530 fi
1531
1532 if link_check setenv '(un)?setenv(3)' '#define HAVE_SETENV' << \!
1533 #include <stdlib.h>
1534 int main(void){
1535    setenv("s-mailx", "i want to see it cute!", 1);
1536    unsetenv("s-mailx");
1537    return 0;
1538 }
1539 !
1540 then
1541    :
1542 elif link_check setenv 'putenv(3)' '#define HAVE_PUTENV' << \!
1543 #include <stdlib.h>
1544 int main(void){
1545    putenv("s-mailx=i want to see it cute!");
1546    return 0;
1547 }
1548 !
1549 then
1550    :
1551 else
1552    msg 'ERROR: we require either the setenv(3) or putenv(3) functions.'
1553    config_exit 1
1554 fi
1555
1556 if link_check termios 'termios.h and tc*(3) family' << \!
1557 #include <termios.h>
1558 int main(void){
1559    struct termios tios;
1560
1561    tcgetattr(0, &tios);
1562    tcsetattr(0, TCSANOW | TCSADRAIN | TCSAFLUSH, &tios);
1563    return 0;
1564 }
1565 !
1566 then
1567    :
1568 else
1569    msg 'ERROR: we require termios.h and the tc*() family of functions.'
1570    msg 'That much Unix we indulge ourselfs.'
1571    config_exit 1
1572 fi
1573
1574 ## optional stuff
1575
1576 if link_check vsnprintf 'vsnprintf(3)' << \!
1577 #include <stdarg.h>
1578 #include <stdio.h>
1579 static void dome(char *buf, size_t blen, ...){
1580    va_list ap;
1581
1582    va_start(ap, blen);
1583    vsnprintf(buf, blen, "%s", ap);
1584    va_end(ap);
1585 }
1586 int main(void){
1587    char b[20];
1588
1589    dome(b, sizeof b, "string");
1590    return 0;
1591 }
1592 !
1593 then
1594    :
1595 else
1596    feat_bail_required ERRORS
1597 fi
1598
1599 if [ "${have_vsnprintf}" = yes ]; then
1600    __va_copy() {
1601       link_check va_copy "va_copy(3) (as ${2})" \
1602          "#define HAVE_N_VA_COPY
1603 #define n_va_copy ${2}" <<_EOT
1604 #include <stdarg.h>
1605 #include <stdio.h>
1606 #if ${1}
1607 # if defined __va_copy && !defined va_copy
1608 #  define va_copy __va_copy
1609 # endif
1610 #endif
1611 static void dome2(char *buf, size_t blen, va_list src){
1612    va_list ap;
1613
1614    va_copy(ap, src);
1615    vsnprintf(buf, blen, "%s", ap);
1616    va_end(ap);
1617 }
1618 static void dome(char *buf, size_t blen, ...){
1619    va_list ap;
1620
1621    va_start(ap, blen);
1622    dome2(buf, blen, ap);
1623    va_end(ap);
1624 }
1625 int main(void){
1626    char b[20];
1627
1628    dome(b, sizeof b, "string");
1629    return 0;
1630 }
1631 _EOT
1632    }
1633    __va_copy 0 va_copy || __va_copy 1 __va_copy
1634 fi
1635
1636 run_check pathconf 'f?pathconf(2)' '#define HAVE_PATHCONF' << \!
1637 #include <unistd.h>
1638 #include <errno.h>
1639 int main(void){
1640    int rv = 0;
1641
1642    errno = 0;
1643    rv |= !(pathconf(".", _PC_NAME_MAX) >= 0 || errno == 0 || errno != ENOSYS);
1644    errno = 0;
1645    rv |= !(pathconf(".", _PC_PATH_MAX) >= 0 || errno == 0 || errno != ENOSYS);
1646
1647    /* Only link check */
1648    fpathconf(0, _PC_NAME_MAX);
1649
1650    return rv;
1651 }
1652 !
1653
1654 run_check pipe2 'pipe2(2)' '#define HAVE_PIPE2' << \!
1655 #include <fcntl.h>
1656 #include <unistd.h>
1657 # include <errno.h>
1658 int main(void){
1659    int fds[2];
1660
1661    if(!pipe2(fds, O_CLOEXEC) || errno != ENOSYS)
1662       return 0;
1663    return 1;
1664 }
1665 !
1666
1667 # We use this only then for now (need NOW+1)
1668 run_check utimensat 'utimensat(2)' '#define HAVE_UTIMENSAT' << \!
1669 #include <fcntl.h> /* For AT_* */
1670 #include <sys/stat.h>
1671 # include <errno.h>
1672 int main(void){
1673    struct timespec ts[2];
1674
1675    ts[0].tv_nsec = UTIME_NOW;
1676    ts[1].tv_nsec = UTIME_OMIT;
1677    if(!utimensat(AT_FDCWD, "", ts, 0) || errno != ENOSYS)
1678       return 0;
1679    return 1;
1680 }
1681 !
1682
1683 ##
1684
1685 # XXX Add POSIX check once standardized
1686 if link_check posix_random 'arc4random(3)' '#define HAVE_POSIX_RANDOM 0' << \!
1687 #include <stdlib.h>
1688 int main(void){
1689    arc4random();
1690    return 0;
1691 }
1692 !
1693 then
1694    :
1695 elif link_check getrandom 'getrandom(2) (in sys/random.h)' \
1696       '#define HAVE_GETRANDOM(B,S) getrandom(B, S, 0)
1697       #define HAVE_GETRANDOM_HEADER <sys/random.h>' <<\!
1698 #include <sys/random.h>
1699 int main(void){
1700    char buf[256];
1701    getrandom(buf, sizeof buf, 0);
1702    return 0;
1703 }
1704 !
1705 then
1706    :
1707 elif link_check getrandom 'getrandom(2) (via syscall(2))' \
1708       '#define HAVE_GETRANDOM(B,S) syscall(SYS_getrandom, B, S, 0)
1709       #define HAVE_GETRANDOM_HEADER <sys/syscall.h>' <<\!
1710 #include <sys/syscall.h>
1711 int main(void){
1712    char buf[256];
1713    syscall(SYS_getrandom, buf, sizeof buf, 0);
1714    return 0;
1715 }
1716 !
1717 then
1718    :
1719 elif [ -n "${have_no_subsecond_time}" ]; then
1720    msg 'ERROR: %s %s' 'without a native random' \
1721       'one of clock_gettime(2) and gettimeofday(2) is required.'
1722    config_exit 1
1723 fi
1724
1725
1726 link_check putc_unlocked 'putc_unlocked(3)' '#define HAVE_PUTC_UNLOCKED' <<\!
1727 #include <stdio.h>
1728 int main(void){
1729    putc_unlocked('@', stdout);
1730    return 0;
1731 }
1732 !
1733
1734 link_check fchdir 'fchdir(3)' '#define HAVE_FCHDIR' << \!
1735 #include <unistd.h>
1736 int main(void){
1737    fchdir(0);
1738    return 0;
1739 }
1740 !
1741
1742 if run_check realpath 'realpath(3)' '#define HAVE_REALPATH' << \!
1743 #include <stdlib.h>
1744 int main(void){
1745    char x_buf[4096], *x = realpath(".", x_buf);
1746
1747    return (x != NULL) ? 0 : 1;
1748 }
1749 !
1750 then
1751    if run_check realpath_malloc 'realpath(3) takes NULL' \
1752          '#define HAVE_REALPATH_NULL' << \!
1753 #include <stdlib.h>
1754 int main(void){
1755    char *x = realpath(".", NULL);
1756
1757    if(x != NULL)
1758       free(x);
1759    return (x != NULL) ? 0 : 1;
1760 }
1761 !
1762    then
1763       :
1764    fi
1765 fi
1766
1767 ## optional and selectable
1768
1769 if feat_yes DOTLOCK; then
1770    if run_check readlink 'readlink(2)' << \!
1771 #include <unistd.h>
1772 # include <errno.h>
1773 int main(void){
1774    char buf[128];
1775
1776    if(!readlink("here", buf, sizeof buf) || errno != ENOSYS)
1777       return 0;
1778    return 1;
1779 }
1780 !
1781    then
1782       :
1783    else
1784       feat_bail_required DOTLOCK
1785    fi
1786 fi
1787
1788 if feat_yes DOTLOCK; then
1789    if run_check fchown 'fchown(2)' << \!
1790 #include <unistd.h>
1791 # include <errno.h>
1792 int main(void){
1793    if(!fchown(0, 0, 0) || errno != ENOSYS)
1794       return 0;
1795    return 1;
1796 }
1797 !
1798    then
1799       :
1800    else
1801       feat_bail_required DOTLOCK
1802    fi
1803 fi
1804
1805 ## Now it is the time to fork away the BASE_ series
1806
1807 ${rm} -f ${tmp}
1808 squeeze_em ${inc} ${tmp}
1809 ${mv} ${tmp} ${inc}
1810 squeeze_em ${lib} ${tmp}
1811 ${mv} ${tmp} ${lib}
1812
1813 echo "BASE_LIBS = `${cat} ${lib}`" >> ${mk}
1814 echo "BASE_INCS = `${cat} ${inc}`" >> ${mk}
1815
1816 ## The remains are expected to be used only by the main MUA binary!
1817
1818 OPT_LOCALES=0
1819 link_check setlocale 'setlocale(3)' '#define HAVE_SETLOCALE' << \!
1820 #include <locale.h>
1821 int main(void){
1822    setlocale(LC_ALL, "");
1823    return 0;
1824 }
1825 !
1826 [ -n "${have_setlocale}" ] && OPT_LOCALES=1
1827
1828 OPT_MULTIBYTE_CHARSETS=0
1829 OPT_WIDE_GLYPHS=0
1830 OPT_TERMINAL_CHARSET=0
1831 if [ -n "${have_setlocale}" ]; then
1832    link_check c90amend1 'ISO/IEC 9899:1990/Amendment 1:1995' \
1833       '#define HAVE_C90AMEND1' << \!
1834 #include <limits.h>
1835 #include <stdlib.h>
1836 #include <wchar.h>
1837 #include <wctype.h>
1838 int main(void){
1839    char mbb[MB_LEN_MAX + 1];
1840    wchar_t wc;
1841
1842    iswprint(L'c');
1843    towupper(L'c');
1844    mbtowc(&wc, "x", 1);
1845    mbrtowc(&wc, "x", 1, NULL);
1846    wctomb(mbb, wc);
1847    return (mblen("\0", 1) == 0);
1848 }
1849 !
1850    [ -n "${have_c90amend1}" ] && OPT_MULTIBYTE_CHARSETS=1
1851
1852    if [ -n "${have_c90amend1}" ]; then
1853       link_check wcwidth 'wcwidth(3)' '#define HAVE_WCWIDTH' << \!
1854 #include <wchar.h>
1855 int main(void){
1856    wcwidth(L'c');
1857    return 0;
1858 }
1859 !
1860       [ -n "${have_wcwidth}" ] && OPT_WIDE_GLYPHS=1
1861    fi
1862
1863    link_check nl_langinfo 'nl_langinfo(3)' '#define HAVE_NL_LANGINFO' << \!
1864 #include <langinfo.h>
1865 #include <stdlib.h>
1866 int main(void){
1867    nl_langinfo(DAY_1);
1868    return (nl_langinfo(CODESET) == NULL);
1869 }
1870 !
1871    [ -n "${have_nl_langinfo}" ] && OPT_TERMINAL_CHARSET=1
1872 fi # have_setlocale
1873
1874 link_check fnmatch 'fnmatch(3)' '#define HAVE_FNMATCH' << \!
1875 #include <fnmatch.h>
1876 int main(void){
1877    return (fnmatch("*", ".", FNM_PATHNAME | FNM_PERIOD) == FNM_NOMATCH);
1878 }
1879 !
1880
1881 link_check dirent_d_type 'struct dirent.d_type' '#define HAVE_DIRENT_TYPE' << \!
1882 #include <dirent.h>
1883 int main(void){
1884    struct dirent de;
1885    return !(de.d_type == DT_UNKNOWN ||
1886       de.d_type == DT_DIR || de.d_type == DT_LNK);
1887 }
1888 !
1889
1890 ## optional and selectable
1891
1892 if feat_yes ICONV; then
1893    ${cat} > ${tmp2}.c << \!
1894 #include <stdio.h> /* For C89 NULL */
1895 #include <iconv.h>
1896 int main(void){
1897    iconv_t id;
1898
1899    id = iconv_open("foo", "bar");
1900    iconv(id, NULL, NULL, NULL, NULL);
1901    iconv_close(id);
1902    return 0;
1903 }
1904 !
1905    < ${tmp2}.c link_check iconv 'iconv(3) functionality' \
1906          '#define HAVE_ICONV' ||
1907       < ${tmp2}.c link_check iconv 'iconv(3) functionality (via -liconv)' \
1908          '#define HAVE_ICONV' '-liconv' ||
1909       feat_bail_required ICONV
1910 else
1911    echo '/* OPT_ICONV=0 */' >> ${h}
1912 fi # feat_yes ICONV
1913
1914 if feat_yes SOCKETS || feat_yes SPAM_SPAMD; then
1915    ${cat} > ${tmp2}.c << \!
1916 #include <sys/types.h>
1917 #include <sys/socket.h>
1918 #include <sys/un.h>
1919 # include <errno.h>
1920 int main(void){
1921    struct sockaddr_un soun;
1922
1923    if(socket(AF_UNIX, SOCK_STREAM, 0) == -1 && errno == ENOSYS)
1924       return 1;
1925    if(connect(0, (struct sockaddr*)&soun, 0) == -1 && errno == ENOSYS)
1926       return 1;
1927    if(shutdown(0, SHUT_RD | SHUT_WR | SHUT_RDWR) == -1 && errno == ENOSYS)
1928       return 1;
1929    return 0;
1930 }
1931 !
1932
1933    < ${tmp2}.c run_check af_unix 'AF_UNIX sockets' \
1934          '#define HAVE_UNIX_SOCKETS' ||
1935       < ${tmp2}.c run_check af_unix 'AF_UNIX sockets (via -lnsl)' \
1936          '#define HAVE_UNIX_SOCKETS' '-lnsl' ||
1937       < ${tmp2}.c run_check af_unix 'AF_UNIX sockets (via -lsocket -lnsl)' \
1938          '#define HAVE_UNIX_SOCKETS' '-lsocket -lnsl'
1939 fi
1940
1941 if feat_yes SOCKETS; then
1942    ${cat} > ${tmp2}.c << \!
1943 #include <sys/types.h>
1944 #include <sys/socket.h>
1945 #include <netinet/in.h>
1946 # include <errno.h>
1947 int main(void){
1948    struct sockaddr s;
1949
1950    if(socket(AF_INET, SOCK_STREAM, 0) == -1 && errno == ENOSYS)
1951       return 1;
1952    if(connect(0, &s, 0) == -1 && errno == ENOSYS)
1953       return 1;
1954    return 0;
1955 }
1956 !
1957
1958    < ${tmp2}.c run_check sockets 'sockets' \
1959          '#define HAVE_SOCKETS' ||
1960       < ${tmp2}.c run_check sockets 'sockets (via -lnsl)' \
1961          '#define HAVE_SOCKETS' '-lnsl' ||
1962       < ${tmp2}.c run_check sockets 'sockets (via -lsocket -lnsl)' \
1963          '#define HAVE_SOCKETS' '-lsocket -lnsl' ||
1964       feat_bail_required SOCKETS
1965 else
1966    echo '/* OPT_SOCKETS=0 */' >> ${h}
1967 fi # feat_yes SOCKETS
1968
1969 if feat_yes SOCKETS; then
1970    link_check getaddrinfo 'getaddrinfo(3)' \
1971       '#define HAVE_GETADDRINFO' << \!
1972 #include <sys/types.h>
1973 #include <sys/socket.h>
1974 #include <stdio.h>
1975 #include <netdb.h>
1976 int main(void){
1977    struct addrinfo a, *ap;
1978    int lrv;
1979
1980    switch((lrv = getaddrinfo("foo", "0", &a, &ap))){
1981    case EAI_NONAME:
1982    case EAI_SERVICE:
1983    default:
1984       fprintf(stderr, "%s\n", gai_strerror(lrv));
1985    case 0:
1986       break;
1987    }
1988    return 0;
1989 }
1990 !
1991 fi
1992
1993 if feat_yes SOCKETS && [ -z "${have_getaddrinfo}" ]; then
1994    compile_check arpa_inet_h '<arpa/inet.h>' \
1995       '#define HAVE_ARPA_INET_H' << \!
1996 #include <sys/types.h>
1997 #include <sys/socket.h>
1998 #include <netdb.h>
1999 #include <netinet/in.h>
2000 #include <arpa/inet.h>
2001 !
2002
2003    ${cat} > ${tmp2}.c << \!
2004 #include <sys/types.h>
2005 #include <sys/socket.h>
2006 #include <stdio.h>
2007 #include <string.h>
2008 #include <netdb.h>
2009 #include <netinet/in.h>
2010 #ifdef HAVE_ARPA_INET_H
2011 #include <arpa/inet.h>
2012 #endif
2013 int main(void){
2014    struct sockaddr_in servaddr;
2015    unsigned short portno;
2016    struct servent *ep;
2017    struct hostent *hp;
2018    struct in_addr **pptr;
2019
2020    portno = 0;
2021    if((ep = getservbyname("POPPY-PORT", "tcp")) != NULL)
2022       portno = (unsigned short)ep->s_port;
2023
2024    if((hp = gethostbyname("POPPY-HOST")) != NULL){
2025       pptr = (struct in_addr**)hp->h_addr_list;
2026       if(hp->h_addrtype != AF_INET)
2027          fprintf(stderr, "au\n");
2028    }else{
2029       switch(h_errno){
2030       case HOST_NOT_FOUND:
2031       case TRY_AGAIN:
2032       case NO_RECOVERY:
2033       case NO_DATA:
2034          break;
2035       default:
2036          fprintf(stderr, "au\n");
2037          break;
2038       }
2039    }
2040
2041    memset(&servaddr, 0, sizeof servaddr);
2042    servaddr.sin_family = AF_INET;
2043    servaddr.sin_port = htons(portno);
2044    memcpy(&servaddr.sin_addr, *pptr, sizeof(struct in_addr));
2045    fprintf(stderr, "Would connect to %s:%d ...\n",
2046       inet_ntoa(**pptr), (int)portno);
2047    return 0;
2048 }
2049 !
2050
2051    < ${tmp2}.c link_check gethostbyname 'get(serv|host)byname(3)' ||
2052       < ${tmp2}.c link_check gethostbyname \
2053          'get(serv|host)byname(3) (via -nsl)' '' '-lnsl' ||
2054       < ${tmp2}.c link_check gethostbyname \
2055          'get(serv|host)byname(3) (via -lsocket -nsl)' \
2056          '' '-lsocket -lnsl' ||
2057       feat_bail_required SOCKETS
2058 fi
2059
2060 feat_yes SOCKETS &&
2061 run_check setsockopt 'setsockopt(2)' '#define HAVE_SETSOCKOPT' << \!
2062 #include <sys/socket.h>
2063 #include <stdlib.h>
2064 # include <errno.h>
2065 int main(void){
2066    int sockfd = 3;
2067
2068    if(setsockopt(sockfd, SOL_SOCKET, SO_KEEPALIVE, NULL, 0) == -1 &&
2069          errno == ENOSYS)
2070       return 1;
2071    return 0;
2072 }
2073 !
2074
2075 feat_yes SOCKETS && [ -n "${have_setsockopt}" ] &&
2076 link_check so_sndtimeo 'SO_SNDTIMEO' '#define HAVE_SO_SNDTIMEO' << \!
2077 #include <sys/socket.h>
2078 #include <stdlib.h>
2079 int main(void){
2080    struct timeval tv;
2081    int sockfd = 3;
2082
2083    tv.tv_sec = 42;
2084    tv.tv_usec = 21;
2085    setsockopt(sockfd, SOL_SOCKET, SO_SNDTIMEO, &tv, sizeof tv);
2086    setsockopt(sockfd, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof tv);
2087    return 0;
2088 }
2089 !
2090
2091 feat_yes SOCKETS && [ -n "${have_setsockopt}" ] &&
2092 link_check so_linger 'SO_LINGER' '#define HAVE_SO_LINGER' << \!
2093 #include <sys/socket.h>
2094 #include <stdlib.h>
2095 int main(void){
2096    struct linger li;
2097    int sockfd = 3;
2098
2099    li.l_onoff = 1;
2100    li.l_linger = 42;
2101    setsockopt(sockfd, SOL_SOCKET, SO_LINGER, &li, sizeof li);
2102    return 0;
2103 }
2104 !
2105
2106 if feat_yes SSL; then # {{{
2107    # {{{ LibreSSL decided to define OPENSSL_VERSION_NUMBER with a useless value
2108    # instead of keeping it at the one that corresponds to the OpenSSL at fork
2109    # time: we need to test it first in order to get things right
2110    if compile_check _xssl 'TLS/SSL (LibreSSL)' \
2111       '#define HAVE_SSL
2112       #define HAVE_XSSL
2113       #define HAVE_XSSL_RESSL
2114       #define HAVE_XSSL_OPENSSL 0' << \!
2115 #include <openssl/opensslv.h>
2116 #ifdef LIBRESSL_VERSION_NUMBER
2117 #else
2118 # error nope
2119 #endif
2120 !
2121    then
2122       ossl_v1_1=
2123    # TODO OPENSSL_IS_BORINGSSL, but never tried that one!
2124    elif compile_check _xssl 'TLS/SSL (OpenSSL >= v1.1.0)' \
2125       '#define HAVE_SSL
2126       #define HAVE_XSSL
2127       #define HAVE_XSSL_OPENSSL 0x10100' << \!
2128 #include <openssl/opensslv.h>
2129 #if OPENSSL_VERSION_NUMBER + 0 >= 0x10100000L
2130 #else
2131 # error nope
2132 #endif
2133 !
2134    then
2135       ossl_v1_1=1
2136    elif compile_check _xssl 'TLS/SSL (OpenSSL)' \
2137       '#define HAVE_SSL
2138       #define HAVE_XSSL
2139       #define HAVE_XSSL_OPENSSL 0x10000' << \!
2140 #include <openssl/opensslv.h>
2141 #ifdef OPENSSL_VERSION_NUMBER
2142 #else
2143 # error nope
2144 #endif
2145 !
2146    then
2147       ossl_v1_1=
2148    else
2149       feat_bail_required SSL
2150    fi # }}}
2151
2152    if feat_yes SSL; then # {{{
2153       if [ -n "${ossl_v1_1}" ]; then
2154          without_check yes xssl 'TLS/SSL (new style *_client_method(3ssl))' \
2155             '#define n_XSSL_CLIENT_METHOD TLS_client_method' \
2156             '-lssl -lcrypto'
2157       elif link_check xssl 'TLS/SSL (new style *_client_method(3ssl))' \
2158             '#define n_XSSL_CLIENT_METHOD TLS_client_method' \
2159             '-lssl -lcrypto' << \!
2160 #include <openssl/ssl.h>
2161 #include <openssl/err.h>
2162 #include <openssl/x509v3.h>
2163 #include <openssl/x509.h>
2164 #include <openssl/rand.h>
2165 #ifdef OPENSSL_NO_TLS1 /* TODO only deduced from OPENSSL_NO_SSL[23]! */
2166 # error We need TLSv1.
2167 #endif
2168 int main(void){
2169    SSL_CTX *ctx = SSL_CTX_new(TLS_client_method());
2170
2171    SSL_CTX_free(ctx);
2172    PEM_read_PrivateKey(0, 0, 0, 0);
2173    return 0;
2174 }
2175 !
2176       then
2177          :
2178       elif link_check xssl 'TLS/SSL (old style *_client_method(3ssl))' \
2179             '#define n_XSSL_CLIENT_METHOD SSLv23_client_method' \
2180             '-lssl -lcrypto' << \!
2181 #include <openssl/ssl.h>
2182 #include <openssl/err.h>
2183 #include <openssl/x509v3.h>
2184 #include <openssl/x509.h>
2185 #include <openssl/rand.h>
2186 #if defined OPENSSL_NO_SSL3 &&\
2187       defined OPENSSL_NO_TLS1 /* TODO only deduced from OPENSSL_NO_SSL[23]! */
2188 # error We need one of SSLv3 and TLSv1.
2189 #endif
2190 int main(void){
2191    SSL_CTX *ctx = SSL_CTX_new(SSLv23_client_method());
2192
2193    SSL_CTX_free(ctx);
2194    PEM_read_PrivateKey(0, 0, 0, 0);
2195    return 0;
2196 }
2197 !
2198       then
2199          :
2200       else
2201          feat_bail_required SSL
2202       fi
2203    fi # }}}
2204
2205    if feat_yes SSL; then # {{{
2206       if [ -n "${ossl_v1_1}" ]; then
2207          without_check yes xssl_stack_of 'TLS/SSL STACK_OF()' \
2208             '#define HAVE_XSSL_STACK_OF'
2209       elif compile_check xssl_stack_of 'TLS/SSL STACK_OF()' \
2210             '#define HAVE_XSSL_STACK_OF' << \!
2211 #include <stdio.h> /* For C89 NULL */
2212 #include <openssl/ssl.h>
2213 #include <openssl/err.h>
2214 #include <openssl/x509v3.h>
2215 #include <openssl/x509.h>
2216 #include <openssl/rand.h>
2217 int main(void){
2218    STACK_OF(GENERAL_NAME) *gens = NULL;
2219
2220    printf("%p", gens); /* to use it */
2221    return 0;
2222 }
2223 !
2224       then
2225          :
2226       fi
2227
2228       if [ -n "${ossl_v1_1}" ]; then
2229          without_check yes xssl_conf 'TLS/SSL OpenSSL_modules_load_file()' \
2230             '#define HAVE_XSSL_CONFIG'
2231       elif link_check xssl_conf 'TLS/SSL OpenSSL_modules_load_file() support' \
2232             '#define HAVE_XSSL_CONFIG' << \!
2233 #include <stdio.h> /* For C89 NULL */
2234 #include <openssl/conf.h>
2235 int main(void){
2236    CONF_modules_load_file(NULL, NULL, CONF_MFLAGS_IGNORE_MISSING_FILE);
2237    CONF_modules_free();
2238    return 0;
2239 }
2240 !
2241       then
2242          :
2243       fi
2244
2245       if [ -n "${ossl_v1_1}" ]; then
2246          without_check yes xssl_conf_ctx 'TLS/SSL SSL_CONF_CTX support' \
2247             '#define HAVE_XSSL_CONF_CTX'
2248       elif link_check xssl_conf_ctx 'TLS/SSL SSL_CONF_CTX support' \
2249          '#define HAVE_XSSL_CONF_CTX' << \!
2250 #include <openssl/ssl.h>
2251 #include <openssl/err.h>
2252 int main(void){
2253    SSL_CTX *ctx = SSL_CTX_new(n_XSSL_CLIENT_METHOD());
2254    SSL_CONF_CTX *cctx = SSL_CONF_CTX_new();
2255
2256    SSL_CONF_CTX_set_flags(cctx,
2257       SSL_CONF_FLAG_FILE | SSL_CONF_FLAG_CLIENT |
2258       SSL_CONF_FLAG_CERTIFICATE | SSL_CONF_FLAG_SHOW_ERRORS);
2259    SSL_CONF_CTX_set_ssl_ctx(cctx, ctx);
2260    SSL_CONF_cmd(cctx, "Protocol", "ALL");
2261    SSL_CONF_CTX_finish(cctx);
2262    SSL_CONF_CTX_free(cctx);
2263    SSL_CTX_free(ctx);
2264    return 0;
2265 }
2266 !
2267       then
2268          :
2269       fi
2270
2271       if [ -n "${ossl_v1_1}" ]; then
2272          without_check no xssl_rand_egd 'TLS/SSL RAND_egd(3ssl)' \
2273             '#define HAVE_XSSL_RAND_EGD'
2274       elif link_check xssl_rand_egd 'TLS/SSL RAND_egd(3ssl)' \
2275             '#define HAVE_XSSL_RAND_EGD' << \!
2276 #include <openssl/rand.h>
2277 int main(void){
2278    return RAND_egd("some.where") > 0;
2279 }
2280 !
2281       then
2282          :
2283       fi
2284
2285       if feat_yes SSL_ALL_ALGORITHMS; then
2286          if [ -n "${ossl_v1_1}" ]; then
2287             without_check yes ssl_all_algo 'TLS/SSL all-algorithms support' \
2288                '#define HAVE_SSL_ALL_ALGORITHMS'
2289          elif link_check ssl_all_algo 'TLS/SSL all-algorithms support' \
2290             '#define HAVE_SSL_ALL_ALGORITHMS' << \!
2291 #include <openssl/evp.h>
2292 int main(void){
2293    OpenSSL_add_all_algorithms();
2294    EVP_get_cipherbyname("two cents i never exist");
2295    EVP_cleanup();
2296    return 0;
2297 }
2298 !
2299          then
2300             :
2301          else
2302             feat_bail_required SSL_ALL_ALGORITHMS
2303          fi
2304       fi
2305    fi # feat_yes SSL }}}
2306
2307    if feat_yes SSL && feat_yes MD5 && feat_no NOEXTMD5; then # {{{
2308       run_check ssl_md5 'MD5 digest in the used crypto library' \
2309             '#define HAVE_XSSL_MD5' << \!
2310 #include <stdlib.h>
2311 #include <string.h>
2312 #include <openssl/md5.h>
2313 int main(void){
2314    char const dat[] = "abrakadabrafidibus";
2315    char dig[16], hex[16 * 2];
2316    MD5_CTX ctx;
2317    size_t i, j;
2318
2319    memset(dig, 0, sizeof(dig));
2320    memset(hex, 0, sizeof(hex));
2321    MD5_Init(&ctx);
2322    MD5_Update(&ctx, dat, sizeof(dat) - 1);
2323    MD5_Final(dig, &ctx);
2324
2325 #define hexchar(n) ((n) > 9 ? (n) - 10 + 'a' : (n) + '0')
2326    for(i = 0; i < sizeof(hex) / 2; i++){
2327       j = i << 1;
2328       hex[j] = hexchar((dig[i] & 0xf0) >> 4);
2329       hex[++j] = hexchar(dig[i] & 0x0f);
2330    }
2331    return !!memcmp("6d7d0a3d949da2e96f2aa010f65d8326", hex, sizeof(hex));
2332 }
2333 !
2334    fi # }}}
2335 else
2336    echo '/* OPT_SSL=0 */' >> ${h}
2337 fi # }}} feat_yes SSL
2338
2339 if [ "${have_xssl}" = yes ]; then
2340    OPT_SMIME=1
2341 else
2342    OPT_SMIME=0
2343 fi
2344 feat_def SMIME
2345
2346 feat_def SMTP
2347 feat_def POP3
2348 feat_def IMAP
2349
2350 if feat_yes GSSAPI; then
2351    ${cat} > ${tmp2}.c << \!
2352 #include <gssapi/gssapi.h>
2353 int main(void){
2354    gss_import_name(0, 0, GSS_C_NT_HOSTBASED_SERVICE, 0);
2355    gss_init_sec_context(0,0,0,0,0,0,0,0,0,0,0,0,0);
2356    return 0;
2357 }
2358 !
2359    ${sed} -e '1s/gssapi\///' < ${tmp2}.c > ${tmp3}.c
2360
2361    if command -v krb5-config >/dev/null 2>&1; then
2362       i=`command -v krb5-config`
2363       GSS_LIBS="`CFLAGS= ${i} --libs gssapi`"
2364       GSS_INCS="`CFLAGS= ${i} --cflags`"
2365       i='GSS-API via krb5-config(1)'
2366    else
2367       GSS_LIBS='-lgssapi'
2368       GSS_INCS=
2369       i='GSS-API in gssapi/gssapi.h, libgssapi'
2370    fi
2371    if < ${tmp2}.c link_check gss \
2372          "${i}" '#define HAVE_GSSAPI' "${GSS_LIBS}" "${GSS_INCS}" ||\
2373       < ${tmp3}.c link_check gss \
2374          'GSS-API in gssapi.h, libgssapi' \
2375          '#define HAVE_GSSAPI
2376          #define GSSAPI_REG_INCLUDE' \
2377          '-lgssapi' ||\
2378       < ${tmp2}.c link_check gss 'GSS-API in libgssapi_krb5' \
2379          '#define HAVE_GSSAPI' \
2380          '-lgssapi_krb5' ||\
2381       < ${tmp3}.c link_check gss \
2382          'GSS-API in libgssapi, OpenBSD-style (pre 5.3)' \
2383          '#define HAVE_GSSAPI
2384          #define GSS_REG_INCLUDE' \
2385          '-lgssapi -lkrb5 -lcrypto' \
2386          '-I/usr/include/kerberosV' ||\
2387       < ${tmp2}.c link_check gss 'GSS-API in libgss' \
2388          '#define HAVE_GSSAPI' \
2389          '-lgss' ||\
2390       link_check gss 'GSS-API in libgssapi_krb5, old-style' \
2391          '#define HAVE_GSSAPI
2392          #define GSSAPI_OLD_STYLE' \
2393          '-lgssapi_krb5' << \!
2394 #include <gssapi/gssapi.h>
2395 #include <gssapi/gssapi_generic.h>
2396 int main(void){
2397    gss_import_name(0, 0, gss_nt_service_name, 0);
2398    gss_init_sec_context(0,0,0,0,0,0,0,0,0,0,0,0,0);
2399    return 0;
2400 }
2401 !
2402    then
2403       :
2404    else
2405       feat_bail_required GSSAPI
2406    fi
2407 else
2408    echo '/* OPT_GSSAPI=0 */' >> ${h}
2409 fi # feat_yes GSSAPI
2410
2411 feat_def NETRC
2412 feat_def AGENT
2413
2414 if feat_yes IDNA; then
2415    if link_check idna 'GNU Libidn' '#define HAVE_IDNA HAVE_IDNA_LIBIDNA' \
2416          '-lidn' << \!
2417 #include <idna.h>
2418 #include <idn-free.h>
2419 #include <stringprep.h>
2420 int main(void){
2421    char *utf8, *idna_ascii, *idna_utf8;
2422
2423    utf8 = stringprep_locale_to_utf8("does.this.work");
2424    if (idna_to_ascii_8z(utf8, &idna_ascii, IDNA_USE_STD3_ASCII_RULES)
2425          != IDNA_SUCCESS)
2426       return 1;
2427    idn_free(idna_ascii);
2428    /* (Rather link check only here) */
2429    idna_utf8 = stringprep_convert(idna_ascii, "UTF-8", "de_DE");
2430    return 0;
2431 }
2432 !
2433    then
2434       :
2435    elif link_check idna 'idnkit' '#define HAVE_IDNA HAVE_IDNA_IDNKIT' \
2436          '-lidnkit' << \!
2437 #include <stdio.h>
2438 #include <idn/api.h>
2439 #include <idn/result.h>
2440 int main(void){
2441    idn_result_t r;
2442    char ace_name[256];
2443    char local_name[256];
2444
2445    r = idn_encodename(IDN_ENCODE_APP, "does.this.work", ace_name,
2446          sizeof(ace_name));
2447    if (r != idn_success) {
2448       fprintf(stderr, "idn_encodename failed: %s\n", idn_result_tostring(r));
2449       return 1;
2450    }
2451    r = idn_decodename(IDN_DECODE_APP, ace_name, local_name, sizeof(local_name));
2452    if (r != idn_success) {
2453       fprintf(stderr, "idn_decodename failed: %s\n", idn_result_tostring(r));
2454       return 1;
2455    }
2456    return 0;
2457 }
2458 !
2459    then
2460       :
2461    else
2462       feat_bail_required IDNA
2463    fi
2464
2465    if [ -n "${have_idna}" ]; then
2466       echo '#define HAVE_IDNA_LIBIDNA 0' >> ${h}
2467       echo '#define HAVE_IDNA_IDNKIT 1' >> ${h}
2468    fi
2469 else
2470    echo '/* OPT_IDNA=0 */' >> ${h}
2471 fi
2472
2473 feat_def IMAP_SEARCH
2474
2475 if feat_yes REGEX; then
2476    if link_check regex 'regular expressions' '#define HAVE_REGEX' << \!
2477 #include <regex.h>
2478 #include <stdlib.h>
2479 int main(void){
2480    size_t xret;
2481    int status;
2482    regex_t re;
2483
2484    status = regcomp(&re, ".*bsd", REG_EXTENDED | REG_ICASE | REG_NOSUB);
2485    xret = regerror(status, &re, NULL, 0);
2486    status = regexec(&re, "plan9", 0,NULL, 0);
2487    regfree(&re);
2488    return !(status == REG_NOMATCH);
2489 }
2490 !
2491    then
2492       :
2493    else
2494       feat_bail_required REGEX
2495    fi
2496 else
2497    echo '/* OPT_REGEX=0 */' >> ${h}
2498 fi
2499
2500 if feat_yes MLE && [ -n "${have_c90amend1}" ]; then
2501    have_mle=1
2502    echo '#define HAVE_MLE' >> ${h}
2503 else
2504    feat_bail_required MLE
2505    echo '/* OPT_MLE=0 */' >> ${h}
2506 fi
2507
2508 # Generic have-a-line-editor switch for those who need it below
2509 if [ -n "${have_mle}" ]; then
2510    have_cle=1
2511 fi
2512
2513 if [ -n "${have_cle}" ] && feat_yes HISTORY; then
2514    echo '#define HAVE_HISTORY' >> ${h}
2515 else
2516    echo '/* OPT_HISTORY=0 */' >> ${h}
2517 fi
2518
2519 if [ -n "${have_mle}" ] && feat_yes KEY_BINDINGS; then
2520    echo '#define HAVE_KEY_BINDINGS' >> ${h}
2521 else
2522    echo '/* OPT_KEY_BINDINGS=0 */' >> ${h}
2523 fi
2524
2525 if feat_yes TERMCAP; then
2526    __termcaplib() {
2527       link_check termcap "termcap(5) (via ${4})" \
2528          "#define HAVE_TERMCAP${3}" "${1}" << _EOT
2529 #include <stdio.h>
2530 #include <stdlib.h>
2531 ${2}
2532 #include <term.h>
2533 #define UNCONST(P) ((void*)(unsigned long)(void const*)(P))
2534 static int my_putc(int c){return putchar(c);}
2535 int main(void){
2536    char buf[1024+512], cmdbuf[2048], *cpb, *r1;
2537    int r2 = OK, r3 = ERR;
2538
2539    tgetent(buf, getenv("TERM"));
2540    cpb = cmdbuf;
2541    r1 = tgetstr(UNCONST("cm"), &cpb);
2542    tgoto(r1, 1, 1);
2543    r2 = tgetnum(UNCONST("Co"));
2544    r3 = tgetflag(UNCONST("ut"));
2545    tputs("cr", 1, &my_putc);
2546    return (r1 == NULL || r2 == -1 || r3 == 0);
2547 }
2548 _EOT
2549    }
2550
2551    __terminfolib() {
2552       link_check terminfo "terminfo(5) (via ${2})" \
2553          '#define HAVE_TERMCAP
2554          #define HAVE_TERMCAP_CURSES
2555          #define HAVE_TERMINFO' "${1}" << _EOT
2556 #include <stdio.h>
2557 #include <curses.h>
2558 #include <term.h>
2559 #define UNCONST(P) ((void*)(unsigned long)(void const*)(P))
2560 static int my_putc(int c){return putchar(c);}
2561 int main(void){
2562    int er, r0, r1, r2;
2563    char *r3, *tp;
2564
2565    er = OK;
2566    r0 = setupterm(NULL, 1, &er);
2567    r1 = tigetflag(UNCONST("bce"));
2568    r2 = tigetnum(UNCONST("colors"));
2569    r3 = tigetstr(UNCONST("cr"));
2570    tp = tparm(r3, NULL, NULL, 0,0,0,0,0,0,0);
2571    tputs(tp, 1, &my_putc);
2572    return (r0 == ERR || r1 == -1 || r2 == -2 || r2 == -1 ||
2573       r3 == (char*)-1 || r3 == NULL);
2574 }
2575 _EOT
2576    }
2577
2578    if feat_yes TERMCAP_VIA_TERMINFO; then
2579       __terminfolib -ltinfo -ltinfo ||
2580          __terminfolib -lcurses -lcurses ||
2581          __terminfolib -lcursesw -lcursesw ||
2582          feat_bail_required TERMCAP_VIA_TERMINFO
2583    fi
2584
2585    if [ -z "${have_terminfo}" ]; then
2586       __termcaplib -ltermcap '' '' '-ltermcap' ||
2587          __termcaplib -ltermcap '#include <curses.h>' '
2588             #define HAVE_TERMCAP_CURSES' \
2589             'curses.h / -ltermcap' ||
2590          __termcaplib -lcurses '#include <curses.h>' '
2591             #define HAVE_TERMCAP_CURSES' \
2592             'curses.h / -lcurses' ||
2593          __termcaplib -lcursesw '#include <curses.h>' '
2594             #define HAVE_TERMCAP_CURSES' \
2595             'curses.h / -lcursesw' ||
2596          feat_bail_required TERMCAP
2597
2598       if [ -n "${have_termcap}" ]; then
2599          run_check tgetent_null \
2600             "tgetent(3) of termcap(5) takes NULL buffer" \
2601             "#define HAVE_TGETENT_NULL_BUF" << _EOT
2602 #include <stdio.h> /* For C89 NULL */
2603 #include <stdlib.h>
2604 #ifdef HAVE_TERMCAP_CURSES
2605 # include <curses.h>
2606 #endif
2607 #include <term.h>
2608 int main(void){
2609    tgetent(NULL, getenv("TERM"));
2610    return 0;
2611 }
2612 _EOT
2613       fi
2614    fi
2615 else
2616    echo '/* OPT_TERMCAP=0 */' >> ${h}
2617    echo '/* OPT_TERMCAP_VIA_TERMINFO=0 */' >> ${h}
2618 fi
2619
2620 if feat_def SPAM_SPAMC; then
2621    if command -v spamc >/dev/null 2>&1; then
2622       echo "#define SPAM_SPAMC_PATH \"`command -v spamc`\"" >> ${h}
2623    fi
2624 fi
2625
2626 if feat_yes SPAM_SPAMD && [ -n "${have_af_unix}" ]; then
2627    echo '#define HAVE_SPAM_SPAMD' >> ${h}
2628 else
2629    feat_bail_required SPAM_SPAMD
2630    echo '/* OPT_SPAM_SPAMD=0 */' >> ${h}
2631 fi
2632
2633 feat_def SPAM_FILTER
2634
2635 if feat_yes SPAM_SPAMC || feat_yes SPAM_SPAMD || feat_yes SPAM_FILTER; then
2636    echo '#define HAVE_SPAM' >> ${h}
2637 else
2638    echo '/* HAVE_SPAM */' >> ${h}
2639 fi
2640
2641 if feat_yes QUOTE_FOLD &&\
2642       [ -n "${have_c90amend1}" ] && [ -n "${have_wcwidth}" ]; then
2643    echo '#define HAVE_QUOTE_FOLD' >> ${h}
2644 else
2645    feat_bail_required QUOTE_FOLD
2646    echo '/* OPT_QUOTE_FOLD=0 */' >> ${h}
2647 fi
2648
2649 feat_def FILTER_HTML_TAGSOUP
2650 feat_def COLOUR
2651 feat_def DOTLOCK
2652 feat_def MD5
2653 feat_def NOMEMDBG
2654
2655 ## Summarizing
2656
2657 ${rm} -f ${tmp}
2658 squeeze_em ${inc} ${tmp}
2659 ${mv} ${tmp} ${inc}
2660 squeeze_em ${lib} ${tmp}
2661 ${mv} ${tmp} ${lib}
2662
2663 # mk-config.h
2664 ${mv} ${h} ${tmp}
2665 printf '#ifndef n_MK_CONFIG_H\n# define n_MK_CONFIG_H 1\n' > ${h}
2666 ${cat} ${tmp} >> ${h}
2667 ${rm} -f ${tmp}
2668 printf '\n' >> ${h}
2669
2670 # Create the string that is used by *features* and `version'.
2671 # Take this nice opportunity and generate a visual listing of included and
2672 # non-included features for the person who runs the configuration
2673 msg '\nThe following features are included (+) or not (-):'
2674 set -- ${OPTIONS_DETECT} ${OPTIONS} ${OPTIONS_XTRA}
2675 printf '/* The "feature string" */\n' >> ${h}
2676 # Because + is expanded by *folder* if first in "echo $features", put something
2677 printf '#define VAL_FEATURES_CNT '${#}'\n#define VAL_FEATURES "#' >> ${h}
2678 sep=
2679 for opt
2680 do
2681    sdoc=`option_doc_of ${opt}`
2682    [ -z "${sdoc}" ] && continue
2683    sopt="`echo ${opt} | ${tr} '[A-Z]_' '[a-z]-'`"
2684    feat_yes ${opt} && sign=+ || sign=-
2685    printf -- "${sep}${sign}${sopt}" >> ${h}
2686    sep=','
2687    msg " %s %s: %s" ${sign} ${sopt} "${sdoc}"
2688 done
2689 # TODO instead of using sh+tr+awk+printf, use awk, drop option_doc_of, inc here
2690 #exec 5>&1 >>${h}
2691 #${awk} -v opts="${OPTIONS_DETECT} ${OPTIONS} ${OPTIONS_XTRA}" \
2692 #   -v xopts="${XOPTIONS_DETECT} ${XOPTIONS} ${XOPTIONS_XTRA}" \
2693 printf '"\n' >> ${h}
2694
2695 # Create the real mk-config.mk
2696 # Note we cannout use explicit ./ filename prefix for source and object
2697 # pathnames because of a bug in bmake(1)
2698 ${rm} -rf ${tmp0}.* ${tmp0}*
2699 srclist= objlist=
2700 if feat_no AMALGAMATION; then
2701    for i in `printf '%s\n' "${SRCDIR}"*.c | ${sort}`; do
2702       i=`basename "${i}" .c`
2703       if [ "${i}" = privsep ]; then
2704          continue
2705       fi
2706       objlist="${objlist} ${i}.o"
2707       srclist="${srclist} \$(SRCDIR)${i}.c"
2708       printf '%s: %s\n\t$(ECHO_CC)$(CC) $(CFLAGS) $(INCS) -c %s\n' \
2709          "${i}.o" "\$(SRCDIR)${i}.c" "\$(SRCDIR)${i}.c" >> ${mk}
2710    done
2711    printf '\nAMALGAM_TARGET =\nAMALGAM_DEP =\n' >> ${mk}
2712 else
2713    printf '%s:\n\t$(ECHO_CC)$(CC) $(CFLAGS) $(INCS) -c $(SRCDIR)%s\n' \
2714       "main.o" "main.c" >> ${mk}
2715    srclist=main.c objlist=main.o
2716    printf '\nAMALGAM_TARGET = main.o\nAMALGAM_DEP = ' >> ${mk}
2717
2718    printf '\n/* HAVE_AMALGAMATION: include sources */\n' >> ${h}
2719    printf '#elif n_MK_CONFIG_H + 0 == 1\n' >> ${h}
2720    printf '# undef n_MK_CONFIG_H\n' >> ${h}
2721    printf '# define n_MK_CONFIG_H 2\n' >> ${h}
2722    for i in `printf '%s\n' "${SRCDIR}"*.c | ${sort}`; do
2723       i=`basename "${i}"`
2724       if [ "${i}" = main.c ] ||
2725             [ "${i}" = privsep.c ]; then
2726          continue
2727       fi
2728       printf '$(SRCDIR)%s ' "${i}" >> ${mk}
2729       printf '# include "%s%s"\n' "${SRCDIR}" "${i}" >> ${h}
2730    done
2731    echo >> ${mk}
2732 fi
2733 printf 'OBJ_SRC = %s\nOBJ = %s\n' "${srclist}" "${objlist}" >> "${mk}"
2734
2735 printf '#endif /* n_MK_CONFIG_H */\n' >> ${h}
2736
2737 echo "LIBS = `${cat} ${lib}`" >> ${mk}
2738 echo "INCS = `${cat} ${inc}`" >> ${mk}
2739 echo >> ${mk}
2740 ${cat} "${SRCDIR}"make-config.in >> ${mk}
2741
2742 ## Finished!
2743
2744 msg '\nSetup:'
2745 msg ' . System-wide resource file: %s/%s' "${VAL_SYSCONFDIR}" "${VAL_SYSCONFRC}"
2746 msg ' . bindir: %s' "${VAL_BINDIR}"
2747 if feat_yes DOTLOCK; then
2748    msg ' . libexecdir: %s' "${VAL_LIBEXECDIR}"
2749 fi
2750 msg ' . mandir: %s' "${VAL_MANDIR}"
2751 msg ' . M(ail)T(ransfer)A(gent): %s (argv0 %s)' "${VAL_MTA}" "${VAL_MTA_ARGV0}"
2752 msg ' . $MAIL spool directory: %s' "${VAL_MAIL}"
2753 msg ''
2754
2755 if [ -n "${have_fnmatch}" ] && [ -n "${have_fchdir}" ]; then
2756    exit 0
2757 fi
2758 msg 'Remarks:'
2759 if [ -z "${have_fnmatch}" ]; then
2760    msg ' . The function fnmatch(3) could not be found.'
2761    msg '   Filename patterns like wildcard are not supported on your system'
2762 fi
2763 if [ -z "${have_fchdir}" ]; then
2764    msg ' . The function fchdir(2) could not be found.'
2765    msg '   We will use chdir(2) instead.'
2766    msg '   This is a problem only if the current working directory is changed'
2767    msg '   while this program is inside of it'
2768 fi
2769 msg ''
2770
2771 # s-it-mode