mk-conf.sh

   1 #!/bin/sh -
   2 #@ Please see INSTALL and make.rc instead.
   3
   4 LC_ALL=C
   5 export LC_ALL
   6
   7 # The feature set, to be kept in sync with make.rc
   8 # If no documentation given, the option is used as such; if doc is a hyphen,
   9 # entry is suppressed when configuration overview is printed, and also in the
  10 # *features* string: most likely for obsolete features etc.
  11 XOPTIONS="\
  12    ICONV='Character set conversion using iconv(3)' \
  13    SOCKETS='Network support' \
  14       SSL='SSL/TLS (OpenSSL / LibreSSL)' \
  15          SSL_ALL_ALGORITHMS='Support of all digest and cipher algorithms' \
  16       SMTP='Simple Mail Transfer Protocol client' \
  17       POP3='Post Office Protocol Version 3 client' \
  18       GSSAPI='Generic Security Service authentication' \
  19       NETRC='.netrc file support' \
  20       AGENT='-' \
  21       MD5='MD5 message digest (APOP, CRAM-MD5)' \
  22    IDNA='Internationalized Domain Names for Applications (encode only)' \
  23    IMAP_SEARCH='IMAP-style search expressions' \
  24    REGEX='Regular expressions' \
  25    MLE='Mailx Line Editor' \
  26       HISTORY='Line editor history management' \
  27       KEY_BINDINGS='Configurable key bindings' \
  28    TERMCAP='Terminal capability queries (termcap(5))' \
  29       TERMCAP_VIA_TERMINFO='Terminal capability queries use terminfo(5)' \
  30    ERRORS='Error log message ring' \
  31    SPAM_SPAMC='Spam management via spamc(1) of spamassassin(1)' \
  32    SPAM_SPAMD='-' \
  33    SPAM_FILTER='Freely configurable *spam-filter-..*s' \
  34    DOCSTRINGS='Command documentation help strings' \
  35    QUOTE_FOLD='Extended *quote-fold*ing' \
  36    FILTER_HTML_TAGSOUP='Simple builtin HTML-to-text display filter' \
  37    COLOUR='Coloured message display' \
  38    DOTLOCK='Dotlock files and privilege-separated dotlock program' \
  39 "
  40
  41 # Options which are automatically deduced from host environment, i.e., these
  42 # need special treatment all around here to warp from/to OPT_ stuff
  43 # setlocale, C90AMEND1, NL_LANGINFO, wcwidth
  44 XOPTIONS_DETECT="\
  45    LOCALES='Locale support - printable characters etc. depend on environment' \
  46    MULTIBYTE_CHARSETS='Multibyte character sets' \
  47    TERMINAL_CHARSET='Automatic detection of terminal character set' \
  48    WIDE_GLYPHS='Wide glyph support' \
  49 "
  50
  51 # Rather special options, for custom building, or which always exist.
  52 # Mostly for generating the visual overview and the *features* string
  53 XOPTIONS_XTRA="\
  54    MIME='Multipurpose Internet Mail Extensions' \
  55    SMIME='S/MIME message signing, verification, en- and decryption' \
  56    CROSS_BUILD='Cross-compilation: trust any detected environment' \
  57    DEBUG='Debug enabled binary, not for end-users: THANKS!' \
  58    DEVEL='Computers do not blunder' \
  59 "
  60
  61 # The problem is that we don't have any tools we can use right now, so
  62 # encapsulate stuff in functions which get called in right order later on
  63
  64 option_reset() {
  65    set -- ${OPTIONS}
  66    for i
  67    do
  68       eval OPT_${i}=0
  69    done
  70 }
  71
  72 option_maximal() {
  73    set -- ${OPTIONS}
  74    for i
  75    do
  76       eval OPT_${i}=1
  77    done
  78    OPT_ICONV=require
  79    OPT_REGEX=require
  80    OPT_DOTLOCK=require
  81 }
  82
  83 option_setup() {
  84    option_parse OPTIONS_DETECT "${XOPTIONS_DETECT}"
  85    option_parse OPTIONS "${XOPTIONS}"
  86    option_parse OPTIONS_XTRA "${XOPTIONS_XTRA}"
  87    OPT_MIME=1
  88
  89    # Predefined CONFIG= urations take precedence over anything else
  90    if [ -n "${CONFIG}" ]; then
  91       case "${CONFIG}" in
  92       [nN][uU][lL][lL])
  93          option_reset
  94          ;;
  95       [nN][uU][lL][lL][iI])
  96          option_reset
  97          OPT_ICONV=require
  98          ;;
  99       [mM][iI][nN][iI][mM][aA][lL])
 100          option_reset
 101          OPT_ICONV=1
 102          OPT_REGEX=1
 103          OPT_DOTLOCK=require
 104          ;;
 105       [mM][eE][dD][iI][uU][mM])
 106          option_reset
 107          OPT_ICONV=require
 108          OPT_IDNA=1
 109          OPT_REGEX=1
 110          OPT_MLE=1
 111             OPT_HISTORY=1 OPT_KEY_BINDINGS=1
 112          OPT_ERRORS=1
 113          OPT_SPAM_FILTER=1
 114          OPT_DOCSTRINGS=1
 115          OPT_COLOUR=1
 116          OPT_DOTLOCK=require
 117          ;;
 118       [nN][eE][tT][sS][eE][nN][dD])
 119          option_reset
 120          OPT_ICONV=require
 121          OPT_SOCKETS=1
 122             OPT_SSL=require
 123             OPT_SMTP=require
 124             OPT_GSSAPI=1 OPT_NETRC=1 OPT_AGENT=1
 125          OPT_IDNA=1
 126          OPT_REGEX=1
 127          OPT_MLE=1
 128             OPT_HISTORY=1 OPT_KEY_BINDINGS=1
 129          OPT_DOCSTRINGS=1
 130          OPT_COLOUR=1
 131          OPT_DOTLOCK=require
 132          ;;
 133       [mM][aA][xX][iI][mM][aA][lL])
 134          option_reset
 135          option_maximal
 136          ;;
 137       [dD][eE][vV][eE][lL])
 138          OPT_DEVEL=1 OPT_DEBUG=1 OPT_NYD2=1
 139          option_maximal
 140          ;;
 141       [oO][dD][eE][vV][eE][lL])
 142          OPT_DEVEL=1
 143          option_maximal
 144          ;;
 145       *)
 146          echo >&2 "Unknown CONFIG= setting: ${CONFIG}"
 147          echo >&2 '   NULL, NULLI, MINIMAL, MEDIUM, NETSEND, MAXIMAL'
 148          exit 1
 149          ;;
 150       esac
 151    fi
 152 }
 153
 154 # Inter-relationships
 155 option_update() {
 156    if feat_no SMTP && feat_no POP3; then
 157       OPT_SOCKETS=0
 158    fi
 159    if feat_no SOCKETS; then
 160       if feat_require SMTP; then
 161          msg 'ERROR: need SOCKETS for required feature SMTP'
 162          config_exit 13
 163       fi
 164       if feat_require POP3; then
 165          msg 'ERROR: need SOCKETS for required feature POP3'
 166          config_exit 13
 167       fi
 168       OPT_SSL=0 OPT_SSL_ALL_ALGORITHMS=0
 169       OPT_SMTP=0 OPT_POP3=0
 170       OPT_GSSAPI=0 OPT_NETRC=0 OPT_AGENT=0
 171    fi
 172    if feat_no SMTP; then
 173       OPT_GSSAPI=0
 174    fi
 175
 176    if feat_no MLE; then
 177       OPT_HISTORY=0 OPT_KEY_BINDINGS=0
 178    fi
 179
 180    # If we don't need MD5 leave it alone
 181    if feat_no SOCKETS; then
 182       OPT_MD5=0
 183    fi
 184
 185    if feat_yes DEVEL; then
 186       OPT_DEBUG=1
 187    fi
 188 }
 189
 190 rc=./make.rc
 191 lst=./config.lst
 192 ev=./config.ev
 193 h=./config.h h_name=config.h
 194 mk=./mk.mk
 195
 196 newlst=./config.lst-new
 197 newmk=./config.mk-new
 198 newev=./config.ev-new
 199 newh=./config.h-new
 200 tmp0=___tmp
 201 tmp=./${tmp0}1$$
 202 tmp2=./${tmp0}2$$
 203
 204 ##  --  >8  - << OPTIONS | OS/CC >> -  8<  --  ##
 205
 206 # Note that potential duplicates in PATH, C_INCLUDE_PATH etc. will be cleaned
 207 # via path_check() later on once possible
 208
 209 # TODO cc_maxopt is brute simple, we should compile test program and dig real
 210 # compiler versions for known compilers, then be more specific
 211 cc_maxopt=100
 212 _CFLAGS= _LDFLAGS=
 213
 214 os_early_setup() {
 215    # We don't "have any utility": only path adjustments and such in here!
 216    i="${OS:-`uname -s`}"
 217
 218    if [ ${i} = SunOS ]; then
 219       msg 'SunOS / Solaris?  Applying some "early setup" rules ...'
 220       _os_early_setup_sunos
 221    fi
 222 }
 223
 224 _os_early_setup_sunos() {
 225    # According to standards(5), this is what we need to do
 226    if [ -d /usr/xpg4 ]; then :; else
 227       msg 'ERROR: On SunOS / Solaris we need /usr/xpg4 environment!  Sorry.'
 228       config_exit 1
 229    fi
 230    PATH="/usr/xpg4/bin:/usr/ccs/bin:/usr/bin:${PATH}"
 231    [ -d /usr/xpg6 ] && PATH="/usr/xpg6/bin:${PATH}"
 232    export PATH
 233 }
 234
 235 os_setup() {
 236    # OSFULLSPEC is used to recognize changes (i.e., machine type, updates etc.)
 237    OSFULLSPEC="${OS:-`uname -a | ${tr} '[A-Z]' '[a-z]'`}"
 238    OS="${OS:-`uname -s | ${tr} '[A-Z]' '[a-z]'`}"
 239    msg 'Operating system is %s' ${OS}
 240
 241    if [ ${OS} = sunos ]; then
 242       msg ' . have special SunOS / Solaris "setup" rules ...'
 243       _os_setup_sunos
 244    elif [ ${OS} = unixware ]; then
 245       msg ' . have special UnixWare environmental rules ...'
 246       if feat_yes AUTOCC && command -v cc >/dev/null 2>&1; then
 247          CC=cc
 248          feat_yes DEBUG && _CFLAGS='-v -Xa -g' || _CFLAGS='-Xa -O'
 249
 250          CFLAGS="${_CFLAGS} ${EXTRA_CFLAGS}"
 251          LDFLAGS="${_LDFLAGS} ${EXTRA_LDFLAGS}"
 252          export CC CFLAGS LDFLAGS
 253          OPT_AUTOCC=0 had_want_autocc=1 need_R_ldflags=-R
 254       fi
 255    elif [ -n "${VERBOSE}" ]; then
 256       msg ' . no special treatment for this system necessary or known'
 257    fi
 258
 259    # Sledgehammer: better set _GNU_SOURCE
 260    # And in general: oh, boy!
 261    OS_DEFINES="${OS_DEFINES}#define _GNU_SOURCE\n"
 262    #OS_DEFINES="${OS_DEFINES}#define _POSIX_C_SOURCE 200809L\n"
 263    #OS_DEFINES="${OS_DEFINES}#define _XOPEN_SOURCE 700\n"
 264    #[ ${OS} = darwin ] && OS_DEFINES="${OS_DEFINES}#define _DARWIN_C_SOURCE\n"
 265
 266    # On pkgsrc(7) systems automatically add /usr/pkg/*
 267    if [ -d /usr/pkg ]; then
 268       C_INCLUDE_PATH="${C_INCLUDE_PATH}:/usr/pkg/include"
 269       LD_LIBRARY_PATH="${LD_LIBRARY_PATH}:/usr/pkg/lib"
 270    fi
 271 }
 272
 273 _os_setup_sunos() {
 274    C_INCLUDE_PATH="/usr/xpg4/include:${C_INCLUDE_PATH}"
 275    LD_LIBRARY_PATH="/usr/xpg4/lib:${LD_LIBRARY_PATH}"
 276
 277    # Include packages
 278    if [ -d /opt/csw ]; then
 279       C_INCLUDE_PATH="${C_INCLUDE_PATH}:/opt/csw/include"
 280       LD_LIBRARY_PATH="${LD_LIBRARY_PATH}:/opt/csw/lib"
 281    fi
 282
 283    OS_DEFINES="${OS_DEFINES}#define __EXTENSIONS__\n"
 284    #OS_DEFINES="${OS_DEFINES}#define _POSIX_C_SOURCE 200112L\n"
 285
 286    [ -n "${cksum}" ] || cksum=/opt/csw/gnu/cksum
 287    if [ -x "${cksum}" ]; then :; else
 288       msg 'ERROR: Not an executable program: %s' "${cksum}"
 289       msg 'ERROR:   We need a CRC-32 cksum(1), as specified in POSIX.'
 290       msg 'ERROR:   However, we do so only for tests.'
 291       msg 'ERROR:   If that is ok, set "cksum=/usr/bin/true", then rerun'
 292       config_exit 1
 293    fi
 294
 295    if feat_yes AUTOCC; then
 296       if command -v cc >/dev/null 2>&1; then
 297          CC=cc
 298          feat_yes DEBUG && _CFLAGS="-v -Xa -g" || _CFLAGS="-Xa -O"
 299
 300          CFLAGS="${_CFLAGS} ${EXTRA_CFLAGS}"
 301          LDFLAGS="${_LDFLAGS} ${EXTRA_LDFLAGS}"
 302          export CC CFLAGS LDFLAGS
 303          OPT_AUTOCC=0 had_want_autocc=1 need_R_ldflags=-R
 304       else
 305          # Assume gcc(1), which supports -R for compat
 306          cc_maxopt=2 force_no_stackprot=1 need_R_ldflags=-Wl,-R
 307       fi
 308    fi
 309 }
 310
 311 # Check out compiler ($CC) and -flags ($CFLAGS)
 312 cc_setup() {
 313    # Even though it belongs into cc_flags we will try to compile and link
 314    # something, so ensure we have a clean state regarding CFLAGS/LDFLAGS or
 315    # EXTRA_CFLAGS/EXTRA_LDFLAGS
 316    if feat_no AUTOCC; then
 317       _cc_default
 318       # Ensure those don't do any harm
 319       EXTRA_CFLAGS= EXTRA_LDFLAGS=
 320       export EXTRA_CFLAGS EXTRA_LDFLAGS
 321       return
 322    else
 323       CFLAGS= LDFLAGS=
 324       export CFLAGS LDFLAGS
 325    fi
 326
 327    [ -n "${CC}" ] && [ "${CC}" != cc ] && { _cc_default; return; }
 328
 329    msg_nonl 'Searching for a usable C compiler .. $CC='
 330    if { i="`command -v clang`"; }; then
 331       CC=${i}
 332    elif { i="`command -v gcc`"; }; then
 333       CC=${i}
 334    elif { i="`command -v c99`"; }; then
 335       CC=${i}
 336    elif { i="`command -v tcc`"; }; then
 337       CC=${i}
 338    elif { i="`command -v pcc`"; }; then
 339       CC=${i}
 340    else
 341       if [ "${CC}" = cc ]; then
 342          :
 343       elif { i="`command -v c89`"; }; then
 344          CC=${i}
 345       else
 346          msg 'boing booom tschak'
 347          msg 'ERROR: I cannot find a compiler!'
 348          msg ' Neither of clang(1), gcc(1), tcc(1), pcc(1), c89(1) and c99(1).'
 349          msg ' Please set ${CC} environment variable, maybe ${CFLAGS}, rerun.'
 350          config_exit 1
 351       fi
 352    fi
 353    msg '%s' "${CC}"
 354    export CC
 355 }
 356
 357 _cc_default() {
 358    if [ -z "${CC}" ]; then
 359       msg 'To go on like you have chosen, please set $CC, rerun.'
 360       config_exit 1
 361    fi
 362
 363    if [ -z "${VERBOSE}" ] && [ -f ${lst} ] && feat_no DEBUG; then
 364       :
 365    else
 366       msg 'Using C compiler ${CC}=%s' "${CC}"
 367    fi
 368 }
 369
 370 cc_flags() {
 371    if feat_yes AUTOCC; then
 372       if [ -f ${lst} ] && feat_no DEBUG && [ -z "${VERBOSE}" ]; then
 373          cc_check_silent=1
 374          msg 'Detecting ${CFLAGS}/${LDFLAGS} for ${CC}=%s, just a second..' \
 375             "${CC}"
 376       else
 377          cc_check_silent=
 378          msg 'Testing usable ${CFLAGS}/${LDFLAGS} for ${CC}=%s' "${CC}"
 379       fi
 380
 381       i=`echo "${CC}" | ${awk} 'BEGIN{FS="/"}{print $NF}'`
 382       if { echo "${i}" | ${grep} tcc; } >/dev/null 2>&1; then
 383          msg ' . have special tcc(1) environmental rules ...'
 384          _cc_flags_tcc
 385       else
 386          # As of pcc CVS 2016-04-02, stack protection support is announced but
 387          # will break if used on Linux
 388          if { echo "${i}" | ${grep} pcc; } >/dev/null 2>&1; then
 389             force_no_stackprot=1
 390          fi
 391          _cc_flags_generic
 392       fi
 393
 394       feat_no DEBUG && _CFLAGS="-DNDEBUG ${_CFLAGS}"
 395       CFLAGS="${_CFLAGS} ${EXTRA_CFLAGS}"
 396       LDFLAGS="${_LDFLAGS} ${EXTRA_LDFLAGS}"
 397    else
 398       if feat_no DEBUG; then
 399          CFLAGS="-DNDEBUG ${CFLAGS}"
 400       fi
 401    fi
 402    msg ''
 403    export CFLAGS LDFLAGS
 404 }
 405
 406 _cc_flags_tcc() {
 407    __cflags=${_CFLAGS} __ldflags=${_LDFLAGS}
 408    _CFLAGS= _LDFLAGS=
 409
 410    cc_check -Wall
 411    cc_check -Wextra
 412    cc_check -pedantic
 413
 414    if feat_yes DEBUG; then
 415       # May have problems to find libtcc cc_check -b
 416       cc_check -g
 417    fi
 418
 419    if ld_check -Wl,-rpath =./ no; then
 420       need_R_ldflags=-Wl,-rpath=
 421       ld_runtime_flags # update!
 422    fi
 423
 424    _CFLAGS="${_CFLAGS} ${__cflags}" _LDFLAGS="${_LDFLAGS} ${__ldflags}"
 425    unset __cflags __ldflags
 426 }
 427
 428 _cc_flags_generic() {
 429    __cflags=${_CFLAGS} __ldflags=${_LDFLAGS}
 430    _CFLAGS= _LDFLAGS=
 431    feat_yes DEVEL && cc_check -std=c89 || cc_check -std=c99
 432
 433    # Check -g first since some others may rely upon -g / optim. level
 434    if feat_yes DEBUG; then
 435       cc_check -O
 436       cc_check -g
 437    elif [ ${cc_maxopt} -gt 2 ] && cc_check -O3; then
 438       :
 439    elif [ ${cc_maxopt} -gt 1 ] && cc_check -O2; then
 440       :
 441    elif [ ${cc_maxopt} -gt 0 ] && cc_check -O1; then
 442       :
 443    else
 444       cc_check -O
 445    fi
 446
 447    if feat_yes DEVEL && cc_check -Weverything; then
 448       :
 449    else
 450       cc_check -Wall
 451       cc_check -Wextra
 452       cc_check -Wbad-function-cast
 453       cc_check -Wcast-align
 454       cc_check -Wcast-qual
 455       cc_check -Winit-self
 456       cc_check -Wmissing-prototypes
 457       cc_check -Wshadow
 458       cc_check -Wunused
 459       cc_check -Wwrite-strings
 460       cc_check -Wno-long-long
 461    fi
 462    cc_check -pedantic
 463
 464    if feat_yes AMALGAMATION && feat_no DEVEL; then
 465       cc_check -Wno-unused-function
 466    fi
 467    feat_no DEVEL && cc_check -Wno-unused-result # XXX do right way (pragma too)
 468
 469    cc_check -fno-unwind-tables
 470    cc_check -fno-asynchronous-unwind-tables
 471    cc_check -fstrict-aliasing
 472    if cc_check -fstrict-overflow && feat_yes DEVEL; then
 473       cc_check -Wstrict-overflow=5
 474    fi
 475
 476    if feat_yes DEBUG || feat_yes FORCED_STACKPROT; then
 477       if [ -z "${force_no_stackprot}" ]; then
 478          if cc_check -fstack-protector-strong ||
 479                cc_check -fstack-protector-all; then
 480             cc_check -D_FORTIFY_SOURCE=2
 481          fi
 482       else
 483          msg 'Not checking for -fstack-protector compiler option,'
 484          msg 'since that caused errors in a "similar" configuration.'
 485          msg 'You may turn off OPT_AUTOCC and use your own settings, rerun'
 486       fi
 487    fi
 488
 489    if feat_yes AMALGAMATION; then
 490       cc_check -pipe
 491    fi
 492
 493    # LD (+ dependend CC)
 494
 495    if feat_yes DEVEL; then
 496       _ccfg=${_CFLAGS}
 497       # -fsanitize=address
 498       #if cc_check -fsanitize=memory &&
 499       #      ld_check -fsanitize=memory &&
 500       #      cc_check -fsanitize-memory-track-origins=2 &&
 501       #      ld_check -fsanitize-memory-track-origins=2; then
 502       #   :
 503       #else
 504       #   _CFLAGS=${_ccfg}
 505       #fi
 506    fi
 507
 508    ld_check -Wl,-z,relro
 509    ld_check -Wl,-z,now
 510    ld_check -Wl,-z,noexecstack
 511    if ld_check -Wl,-rpath =./ no; then
 512       need_R_ldflags=-Wl,-rpath=
 513       ld_runtime_flags # update!
 514    elif ld_check -Wl,-R ./ no; then
 515       need_R_ldflags=-Wl,-R
 516       ld_runtime_flags # update!
 517    fi
 518
 519    # Address randomization
 520    _ccfg=${_CFLAGS}
 521    if cc_check -fPIE || cc_check -fpie; then
 522       ld_check -pie || _CFLAGS=${_ccfg}
 523    fi
 524    unset _ccfg
 525
 526    _CFLAGS="${_CFLAGS} ${__cflags}" _LDFLAGS="${_LDFLAGS} ${__ldflags}"
 527    unset __cflags __ldflags
 528 }
 529
 530 ##  --  >8  - <<OS/CC | SUPPORT FUNS>> -  8<  --  ##
 531
 532 ## Notes:
 533 ## - Heirloom sh(1) (and same origin) have _sometimes_ problems with ': >'
 534 ##   redirection, so use "printf '' >" instead
 535
 536 ## Very first: we undergo several states regarding I/O redirection etc.,
 537 ## but need to deal with option updates from within all.  Since all the
 538 ## option stuff should be above the scissor line, define utility functions
 539 ## and redefine them as necessary.
 540 ## And, since we have those functions, simply use them for whatever
 541
 542 config_exit() {
 543    exit ${1}
 544 }
 545
 546 msg() {
 547    fmt=${1}
 548    shift
 549    printf >&2 -- "${fmt}\\n" "${@}"
 550 }
 551
 552 msg_nonl() {
 553    fmt=${1}
 554    shift
 555    printf >&2 -- "${fmt}" "${@}"
 556 }
 557
 558 t1=ten10one1ten10one1
 559 if ( [ ${t1##*ten10} = one1 ] && [ ${t1#*ten10} = one1ten10one1 ] &&
 560       [ ${t1%%one1*} = ten10 ] && [ ${t1%one1*} = ten10one1ten10 ]
 561       ) > /dev/null 2>&1; then
 562    good_shell=1
 563 else
 564    unset good_shell
 565 fi
 566 unset t1
 567
 568 # We need some standard utilities
 569 unset -f command
 570 check_tool() {
 571    n=${1} i=${2} opt=${3:-0}
 572    # Evaluate, just in case user comes in with shell snippets (..well..)
 573    eval i="${i}"
 574    if type "${i}" >/dev/null 2>&1; then # XXX why have i type not command -v?
 575       [ -n "${VERBOSE}" ] && msg ' . ${%s} ... %s' "${n}" "${i}"
 576       eval ${n}=${i}
 577       return 0
 578    fi
 579    if [ ${opt} -eq 0 ]; then
 580       msg 'ERROR: no trace of utility %s' "${n}"
 581       config_exit 1
 582    fi
 583    return 1
 584 }
 585
 586 # Our feature check environment
 587 feat_val_no() {
 588    [ "x${1}" = x0 ] || [ "x${1}" = xn ] ||
 589    [ "x${1}" = xfalse ] || [ "x${1}" = xno ] || [ "x${1}" = xoff ]
 590 }
 591
 592 feat_val_yes() {
 593    [ "x${1}" = x1 ] || [ "x${1}" = xy ] ||
 594    [ "x${1}" = xtrue ] || [ "x${1}" = xyes ] || [ "x${1}" = xon ] ||
 595          [ "x${1}" = xrequire ]
 596 }
 597
 598 feat_val_require() {
 599    [ "x${1}" = xrequire ]
 600 }
 601
 602 _feat_check() {
 603    eval i=\$OPT_${1}
 604    i="`echo ${i} | ${tr} '[A-Z]' '[a-z]'`"
 605    if feat_val_no "${i}"; then
 606       return 1
 607    elif feat_val_yes "${i}"; then
 608       return 0
 609    else
 610       msg "ERROR: %s: 0/n/false/no/off or 1/y/true/yes/on/require, got: %s" \
 611          "${1}" "${i}"
 612       config_exit 11
 613    fi
 614 }
 615
 616 feat_yes() {
 617    _feat_check ${1}
 618 }
 619
 620 feat_no() {
 621    _feat_check ${1} && return 1
 622    return 0
 623 }
 624
 625 feat_require() {
 626    eval i=\$OPT_${1}
 627    i="`echo ${i} | ${tr} '[A-Z]' '[a-z]'`"
 628    [ "x${i}" = xrequire ] || [ "x${i}" = xrequired ]
 629 }
 630
 631 feat_bail_required() {
 632    if feat_require ${1}; then
 633       msg 'ERROR: feature OPT_%s is required but not available' "${1}"
 634       config_exit 13
 635    fi
 636    eval OPT_${1}=0
 637    option_update # XXX this is rather useless here (dependency chain..)
 638 }
 639
 640 option_parse() {
 641    # Parse one of our XOPTIONS* in $2 and assign the sh(1) compatible list of
 642    # options, without documentation, to $1
 643    j=\'
 644    i="`${awk} -v input=\"${2}\" '
 645       BEGIN{
 646          for(i = 0;;){
 647             voff = match(input, /[[:alnum:]_]+(='${j}'[^'${j}']+)?/)
 648             if(voff == 0)
 649                break
 650             v = substr(input, voff, RLENGTH)
 651             input = substr(input, voff + RLENGTH)
 652             doff = index(v, "=")
 653             if(doff > 0){
 654                d = substr(v, doff + 2, length(v) - doff - 1)
 655                v = substr(v, 1, doff - 1)
 656             }
 657             print v
 658          }
 659       }
 660       '`"
 661    eval ${1}=\"${i}\"
 662 }
 663
 664 option_doc_of() {
 665    # Return the "documentation string" for option $1, itself if none such
 666    j=\'
 667    ${awk} -v want="${1}" \
 668       -v input="${XOPTIONS_DETECT}${XOPTIONS}${XOPTIONS_XTRA}" '
 669    BEGIN{
 670       for(;;){
 671          voff = match(input, /[[:alnum:]_]+(='${j}'[^'${j}']+)?/)
 672          if(voff == 0)
 673             break
 674          v = substr(input, voff, RLENGTH)
 675          input = substr(input, voff + RLENGTH)
 676          doff = index(v, "=")
 677          if(doff > 0){
 678             d = substr(v, doff + 2, length(v) - doff - 1)
 679             v = substr(v, 1, doff - 1)
 680          }else
 681             d = v
 682          if(v == want){
 683             if(d != "-")
 684                print d
 685             exit
 686          }
 687       }
 688    }
 689    '
 690 }
 691
 692 option_join_rc() {
 693    # Join the values from make.rc into what currently is defined, not
 694    # overwriting yet existing settings
 695    ${rm} -f ${tmp}
 696    # We want read(1) to perform backslash escaping in order to be able to use
 697    # multiline values in make.rc; the resulting sh(1)/sed(1) code was very slow
 698    # in VMs (see [fa2e248]), Aharon Robbins suggested the following
 699    < ${rc} ${awk} 'BEGIN{line = ""}{
 700       gsub(/^[[:space:]]+/, "", $0)
 701       gsub(/[[:space:]]+$/, "", $0)
 702       if(gsub(/\\$/, "", $0)){
 703          line = line $0
 704          next
 705       }else
 706          line = line $0
 707       if(index(line, "#") == 1){
 708          line = ""
 709       }else if(length(line)){
 710          print line
 711          line = ""
 712       }
 713    }' |
 714    while read line; do
 715       if [ -n "${good_shell}" ]; then
 716          i=${line%%=*}
 717       else
 718          i=`${awk} -v LINE="${line}" 'BEGIN{
 719             gsub(/=.*$/, "", LINE)
 720             print LINE
 721          }'`
 722       fi
 723       if [ "${i}" = "${line}" ]; then
 724          msg 'ERROR: invalid syntax in: %s' "${line}"
 725          continue
 726       fi
 727
 728       eval j="\$${i}" jx="\${${i}+x}"
 729       if [ -n "${j}" ] || [ "${jx}" = x ]; then
 730          : # Yet present
 731       else
 732          j=`${awk} -v LINE="${line}" 'BEGIN{
 733             gsub(/^[^=]*=/, "", LINE)
 734             gsub(/^\"*/, "", LINE)
 735             gsub(/\"*$/, "", LINE)
 736             print LINE
 737          }'`
 738       fi
 739       [ "${i}" = "DESTDIR" ] && continue
 740       echo "${i}=\"${j}\""
 741    done > ${tmp}
 742    # Reread the mixed version right now
 743    . ./${tmp}
 744 }
 745
 746 option_evaluate() {
 747    # Expand the option values, which may contain shell snippets
 748    ${rm} -f ${newlst} ${newmk} ${newh}
 749    exec 5<&0 6>&1 <${tmp} >${newlst}
 750    while read line; do
 751       z=
 752       if [ -n "${good_shell}" ]; then
 753          i=${line%%=*}
 754          [ "${i}" != "${i#OPT_}" ] && z=1
 755       else
 756          i=`${awk} -v LINE="${line}" 'BEGIN{
 757             gsub(/=.*$/, "", LINE);\
 758             print LINE
 759          }'`
 760          if echo "${i}" | ${grep} '^OPT_' >/dev/null 2>&1; then
 761             z=1
 762          fi
 763       fi
 764
 765       eval j=\$${i}
 766       if [ -n "${z}" ]; then
 767          j="`echo ${j} | ${tr} '[A-Z]' '[a-z]'`"
 768          if [ -z "${j}" ] || feat_val_no "${j}"; then
 769             j=0
 770             printf "   /* #undef ${i} */\n" >> ${newh}
 771          elif feat_val_yes "${j}"; then
 772             if feat_val_require "${j}"; then
 773                j=require
 774             else
 775                j=1
 776             fi
 777             printf "   /* #define ${i} */\n" >> ${newh}
 778          else
 779             msg 'ERROR: cannot parse <%s>' "${line}"
 780             config_exit 1
 781          fi
 782       else
 783          printf "#define ${i} \"${j}\"\n" >> ${newh}
 784       fi
 785       printf "${i} = ${j}\n" >> ${newmk}
 786       printf "${i}=${j}\n"
 787       eval "${i}=\"${j}\""
 788    done
 789    exec 0<&5 1>&6 5<&- 6<&-
 790 }
 791
 792 path_check() {
 793    # "path_check VARNAME" or "path_check VARNAME FLAG VARNAME"
 794    varname=${1} addflag=${2} flagvarname=${3}
 795    j=${IFS}
 796    IFS=:
 797    eval "set -- \$${1}"
 798    IFS=${j}
 799    j= k= y= z=
 800    for i
 801    do
 802       [ -z "${i}" ] && continue
 803       [ -d "${i}" ] || continue
 804       # Skip any fakeroot packager environment
 805       case "${i}" in *fakeroot*) continue;; esac
 806       if [ -n "${j}" ]; then
 807          if { z=${y}; echo "${z}"; } | ${grep} ":${i}:" >/dev/null 2>&1; then
 808             :
 809          else
 810             y="${y} :${i}:"
 811             j="${j}:${i}"
 812             [ -n "${addflag}" ] && k="${k} ${addflag}${i}"
 813          fi
 814       else
 815          y=" :${i}:"
 816          j="${i}"
 817          [ -n "${addflag}" ] && k="${addflag}${i}"
 818       fi
 819    done
 820    eval "${varname}=\"${j}\""
 821    [ -n "${addflag}" ] && eval "${flagvarname}=\"${k}\""
 822    unset varname
 823 }
 824
 825 ld_runtime_flags() {
 826    if [ -n "${need_R_ldflags}" ]; then
 827       i=${IFS}
 828       IFS=:
 829       set -- ${LD_LIBRARY_PATH}
 830       IFS=${i}
 831       for i
 832       do
 833          LDFLAGS="${LDFLAGS} ${need_R_ldflags}${i}"
 834          _LDFLAGS="${_LDFLAGS} ${need_R_ldflags}${i}"
 835       done
 836       export LDFLAGS
 837    fi
 838    # Disable it for a possible second run.
 839    need_R_ldflags=
 840 }
 841
 842 cc_check() {
 843    [ -n "${cc_check_silent}" ] || msg_nonl ' . CC %s .. ' "${1}"
 844    if "${CC}" ${INCS} \
 845          ${_CFLAGS} ${1} ${EXTRA_CFLAGS} ${_LDFLAGS} ${EXTRA_LDFLAGS} \
 846          -o ${tmp2} ${tmp}.c ${LIBS} >/dev/null 2>&1; then
 847       _CFLAGS="${_CFLAGS} ${1}"
 848       [ -n "${cc_check_silent}" ] || msg 'yes'
 849       return 0
 850    fi
 851    [ -n "${cc_check_silent}" ] || msg 'no'
 852    return 1
 853 }
 854
 855 ld_check() {
 856    # $1=option [$2=option argument] [$3=if set, shall NOT be added to _LDFLAGS]
 857    [ -n "${cc_check_silent}" ] || msg_nonl ' . LD %s .. ' "${1}"
 858    if "${CC}" ${INCS} ${_CFLAGS} ${_LDFLAGS} ${1}${2} ${EXTRA_LDFLAGS} \
 859          -o ${tmp2} ${tmp}.c ${LIBS} >/dev/null 2>&1; then
 860       [ -n "${3}" ] || _LDFLAGS="${_LDFLAGS} ${1}"
 861       [ -n "${cc_check_silent}" ] || msg 'yes'
 862       return 0
 863    fi
 864    [ -n "${cc_check_silent}" ] || msg 'no'
 865    return 1
 866 }
 867
 868 _check_preface() {
 869    variable=$1 topic=$2 define=$3
 870
 871    echo '**********'
 872    msg_nonl ' . %s ... ' "${topic}"
 873    echo "/* checked ${topic} */" >> ${h}
 874    ${rm} -f ${tmp} ${tmp}.o
 875    echo '*** test program is'
 876    { echo '#include <'"${h_name}"'>'; cat; } | ${tee} ${tmp}.c
 877    #echo '*** the preprocessor generates'
 878    #${make} -f ${makefile} ${tmp}.x
 879    #${cat} ${tmp}.x
 880    echo '*** results are'
 881 }
 882
 883 without_check() {
 884    yesno=$1 variable=$2 topic=$3 define=$4 libs=$5 incs=$6
 885
 886    echo '**********'
 887    msg_nonl ' . %s ... ' "${topic}"
 888
 889    echo '*** enforced unchecked results are'
 890    if feat_val_yes ${yesno}; then
 891       if [ -n "${incs}" ] || [ -n "${libs}" ]; then
 892          echo "*** adding INCS<${incs}> LIBS<${libs}>"
 893          LIBS="${LIBS} ${libs}"
 894          echo "${libs}" >> ${lib}
 895          INCS="${INCS} ${incs}"
 896          echo "${incs}" >> ${inc}
 897       fi
 898       msg 'yes (deduced)'
 899       echo "${define}" >> ${h}
 900       eval have_${variable}=yes
 901       return 0
 902    else
 903       echo "/* ${define} */" >> ${h}
 904       msg 'no (deduced)'
 905       eval unset have_${variable}
 906       return 1
 907    fi
 908 }
 909
 910 compile_check() {
 911    variable=$1 topic=$2 define=$3
 912
 913    _check_preface "${variable}" "${topic}" "${define}"
 914
 915    if ${make} -f ${makefile} XINCS="${INCS}" \
 916             CFLAGS="${CFLAGS}" LDFLAGS="${LDFLAGS}" \
 917             ./${tmp}.o &&
 918          [ -f ./${tmp}.o ]; then
 919       msg 'yes'
 920       echo "${define}" >> ${h}
 921       eval have_${variable}=yes
 922       return 0
 923    else
 924       echo "/* ${define} */" >> ${h}
 925       msg 'no'
 926       eval unset have_${variable}
 927       return 1
 928    fi
 929 }
 930
 931 _link_mayrun() {
 932    run=$1 variable=$2 topic=$3 define=$4 libs=$5 incs=$6
 933
 934    _check_preface "${variable}" "${topic}" "${define}"
 935
 936    if feat_yes CROSS_BUILD; then
 937       if [ ${run} = 1 ]; then
 938          run=0
 939       fi
 940    fi
 941
 942    if ${make} -f ${makefile} XINCS="${INCS} ${incs}" \
 943             CFLAGS="${CFLAGS}" LDFLAGS="${LDFLAGS}" \
 944             XLIBS="${LIBS} ${libs}" \
 945             ./${tmp} &&
 946          [ -f ./${tmp} ] &&
 947          { [ ${run} -eq 0 ] || ./${tmp}; }; then
 948       echo "*** adding INCS<${incs}> LIBS<${libs}>; executed: ${run}"
 949       msg 'yes'
 950       echo "${define}" >> ${h}
 951       LIBS="${LIBS} ${libs}"
 952       echo "${libs}" >> ${lib}
 953       INCS="${INCS} ${incs}"
 954       echo "${incs}" >> ${inc}
 955       eval have_${variable}=yes
 956       return 0
 957    else
 958       msg 'no'
 959       echo "/* ${define} */" >> ${h}
 960       eval unset have_${variable}
 961       return 1
 962    fi
 963 }
 964
 965 link_check() {
 966    _link_mayrun 0 "${1}" "${2}" "${3}" "${4}" "${5}"
 967 }
 968
 969 run_check() {
 970    _link_mayrun 1 "${1}" "${2}" "${3}" "${4}" "${5}"
 971 }
 972
 973 xrun_check() {
 974    _link_mayrun 2 "${1}" "${2}" "${3}" "${4}" "${5}"
 975 }
 976
 977 feat_def() {
 978    if feat_yes ${1}; then
 979       echo '#define HAVE_'${1}'' >> ${h}
 980    else
 981       echo '/* OPT_'${1}'=0 */' >> ${h}
 982    fi
 983 }
 984
 985 squeeze_em() {
 986    < "${1}" > "${2}" ${awk} \
 987    'BEGIN {ORS = " "} /^[^#]/ {print} {next} END {ORS = ""; print "\n"}'
 988 }
 989
 990 ##  --  >8  - <<SUPPORT FUNS | RUNNING>> -  8<  --  ##
 991
 992 # First of all, create new configuration and check whether it changed
 993
 994 # Very easy checks for the operating system in order to be able to adjust paths
 995 # or similar very basic things which we need to be able to go at all
 996 os_early_setup
 997
 998 # Check those tools right now that we need before including $rc
 999 msg 'Checking for basic utility set'
1000 check_tool awk "${awk:-`command -v awk`}"
1001 check_tool rm "${rm:-`command -v rm`}"
1002 check_tool tr "${tr:-`command -v tr`}"
1003
1004 # Initialize the option set
1005 msg_nonl 'Setting up configuration options ... '
1006 option_setup
1007 msg 'done'
1008
1009 # Include $rc, but only take from it what wasn't overwritten by the user from
1010 # within the command line or from a chosen fixed CONFIG=
1011 # Note we leave alone the values
1012 trap "exit 1" HUP INT TERM
1013 trap "${rm} -f ${tmp}" EXIT
1014
1015 msg_nonl 'Joining in %s ... ' ${rc}
1016 option_join_rc
1017 msg 'done'
1018
1019 # We need to know about that now, in order to provide utility overwrites etc.
1020 os_setup
1021
1022 msg 'Checking for remaining set of utilities'
1023 check_tool grep "${grep:-`command -v grep`}"
1024
1025 # Before we step ahead with the other utilities perform a path cleanup first.
1026 path_check PATH
1027
1028 # awk(1) above
1029 check_tool cat "${cat:-`command -v cat`}"
1030 check_tool chmod "${chmod:-`command -v chmod`}"
1031 check_tool cp "${cp:-`command -v cp`}"
1032 check_tool cmp "${cmp:-`command -v cmp`}"
1033 # grep(1) above
1034 check_tool mkdir "${mkdir:-`command -v mkdir`}"
1035 check_tool mv "${mv:-`command -v mv`}"
1036 # rm(1) above
1037 check_tool sed "${sed:-`command -v sed`}"
1038 check_tool sort "${sort:-`command -v sort`}"
1039 check_tool tee "${tee:-`command -v tee`}"
1040
1041 check_tool chown "${chown:-`command -v chown`}" 1 ||
1042    check_tool chown "/sbin/chown" 1 ||
1043    check_tool chown "/usr/sbin/chown"
1044
1045 check_tool make "${MAKE:-`command -v make`}"
1046 MAKE=${make}
1047 check_tool strip "${STRIP:-`command -v strip`}" 1 &&
1048    HAVE_STRIP=1 || HAVE_STRIP=0
1049
1050 # For ./cc-test.sh only
1051 check_tool cksum "${cksum:-`command -v cksum`}"
1052
1053 # Update OPT_ options now, in order to get possible inter-dependencies right
1054 option_update
1055
1056 # (No functions since some shells loose non-exported variables in traps)
1057 trap "trap \"\" HUP INT TERM; exit 1" HUP INT TERM
1058 trap "trap \"\" HUP INT TERM EXIT;\
1059    ${rm} -rf ${newlst} ${tmp0}.* ${tmp0}* ${newmk} ${newev} ${newh}" EXIT
1060
1061 # Our configuration options may at this point still contain shell snippets,
1062 # we need to evaluate them in order to get them expanded, and we need those
1063 # evaluated values not only in our new configuration file, but also at hand..
1064 msg_nonl 'Evaluating all configuration items ... '
1065 option_evaluate
1066 msg 'done'
1067
1068 # Add the known utility and some other variables
1069 printf "#define VAL_UAGENT \"${VAL_SID}${VAL_NAIL}\"\n" >> ${newh}
1070 printf "VAL_UAGENT = ${VAL_SID}${VAL_NAIL}\n" >> ${newmk}
1071
1072 printf "#define VAL_PRIVSEP \"${VAL_SID}${VAL_NAIL}-privsep\"\n" >> ${newh}
1073 printf "VAL_PRIVSEP = \$(VAL_UAGENT)-privsep\n" >> ${newmk}
1074 if feat_yes DOTLOCK; then
1075    printf "OPTIONAL_PRIVSEP = \$(VAL_PRIVSEP)\n" >> ${newmk}
1076 else
1077    printf "OPTIONAL_PRIVSEP =\n" >> ${newmk}
1078 fi
1079
1080 for i in \
1081       awk cat chmod chown cp cmp grep mkdir mv rm sed sort tee tr \
1082       MAKE MAKEFLAGS make SHELL strip \
1083       cksum; do
1084    eval j=\$${i}
1085    printf "${i} = ${j}\n" >> ${newmk}
1086    printf "${i}=${j}\n" >> ${newlst}
1087    printf "${i}=\"${j}\";export ${i}; " >> ${newev}
1088 done
1089 printf "\n" >> ${newev}
1090
1091 # Build a basic set of INCS and LIBS according to user environment.
1092 path_check C_INCLUDE_PATH -I _INCS
1093 INCS="${INCS} ${_INCS}"
1094 path_check LD_LIBRARY_PATH -L _LIBS
1095 LIBS="${LIBS} ${_LIBS}"
1096 unset _INCS _LIBS
1097 export C_INCLUDE_PATH LD_LIBRARY_PATH
1098
1099 # Some environments need runtime path flags to be able to go at all
1100 ld_runtime_flags
1101
1102 ## Detect CC, whether we can use it, and possibly which CFLAGS we can use
1103
1104 cc_setup
1105
1106 ${cat} > ${tmp}.c << \!
1107 #include <stdio.h>
1108 #include <string.h>
1109 static void doit(char const *s);
1110 int
1111 main(int argc, char **argv){
1112    (void)argc;
1113    (void)argv;
1114    doit("Hello world");
1115    return 0;
1116 }
1117 static void
1118 doit(char const *s){
1119    char buf[12];
1120    memcpy(buf, s, strlen(s) +1);
1121    puts(s);
1122 }
1123 !
1124
1125 if "${CC}" ${INCS} ${CFLAGS} ${EXTRA_CFLAGS} ${LDFLAGS} ${EXTRA_LDFLAGS} \
1126       -o ${tmp2} ${tmp}.c ${LIBS}; then
1127    :
1128 else
1129    msg 'ERROR: i cannot compile a "Hello world" via'
1130    msg '   %s' \
1131    "${CC} ${INCS} ${CFLAGS} ${EXTRA_CFLAGS} ${LDFLAGS} ${EXTRA_LDFLAGS} ${LIBS}"
1132    msg 'ERROR:   Please read INSTALL, rerun'
1133    config_exit 1
1134 fi
1135
1136 # This may also update ld_runtime_flags() (again)
1137 cc_flags
1138
1139 for i in \
1140       INCS LIBS \
1141       ; do
1142    eval j=\$${i}
1143    printf -- "${i}=${j}\n" >> ${newlst}
1144 done
1145 for i in \
1146       CC \
1147       CFLAGS \
1148       LDFLAGS \
1149       PATH C_INCLUDE_PATH LD_LIBRARY_PATH \
1150       OSFULLSPEC \
1151       ; do
1152    eval j=\$${i}
1153    printf -- "${i} = ${j}\n" >> ${newmk}
1154    printf -- "${i}=${j}\n" >> ${newlst}
1155 done
1156
1157 # Now finally check whether we already have a configuration and if so, whether
1158 # all those parameters are still the same.. or something has actually changed
1159 if [ -f ${lst} ] && ${cmp} ${newlst} ${lst} >/dev/null 2>&1; then
1160    echo 'Configuration is up-to-date'
1161    exit 0
1162 elif [ -f ${lst} ]; then
1163    echo 'Configuration has been updated..'
1164    ( eval "${MAKE} -f ./mk.mk clean" )
1165    echo
1166 else
1167    echo 'Shiny configuration..'
1168 fi
1169
1170 # Time to redefine helper 1
1171 config_exit() {
1172    ${rm} -f ${lst} ${h} ${mk}
1173    exit ${1}
1174 }
1175
1176 ${mv} -f ${newlst} ${lst}
1177 ${mv} -f ${newev} ${ev}
1178 ${mv} -f ${newh} ${h}
1179 ${mv} -f ${newmk} ${mk}
1180
1181 if [ -z "${VERBOSE}" ]; then
1182    printf -- "ECHO_CC = @echo '  'CC \$(@);\n" >> ${mk}
1183    printf -- "ECHO_LINK = @echo '  'LINK \$(@);\n" >> ${mk}
1184    printf -- "ECHO_GEN = @echo '  'GEN \$(@);\n" >> ${mk}
1185    printf -- "ECHO_TEST = @\n" >> ${mk}
1186    printf -- "ECHO_CMD = @echo '  CMD';\n" >> ${mk}
1187    printf -- "ECHO_BLOCK_BEGIN = @( \n" >> ${mk}
1188    printf -- "ECHO_BLOCK_END = ) >/dev/null\n" >> ${mk}
1189 fi
1190
1191 ## Compile and link checking
1192
1193 tmp3=./${tmp0}3$$
1194 log=./config.log
1195 lib=./config.lib
1196 inc=./config.inc
1197 makefile=./config.mk
1198
1199 # (No function since some shells loose non-exported variables in traps)
1200 trap "trap \"\" HUP INT TERM;\
1201    ${rm} -f ${lst} ${h} ${mk} ${lib} ${inc}; exit 1" HUP INT TERM
1202 trap "trap \"\" HUP INT TERM EXIT;\
1203    ${rm} -rf ${tmp0}.* ${tmp0}* ${makefile}" EXIT
1204
1205 # Time to redefine helper 2
1206 msg() {
1207    fmt=${1}
1208    shift
1209    printf "*** ${fmt}\\n" "${@}"
1210    printf -- "${fmt}\\n" "${@}" >&5
1211 }
1212 msg_nonl() {
1213    fmt=${1}
1214    shift
1215    printf "*** ${fmt}\\n" "${@}"
1216    printf -- "${fmt}" "${@}" >&5
1217 }
1218
1219 # !!
1220 exec 5>&2 > ${log} 2>&1
1221
1222 echo "${LIBS}" > ${lib}
1223 echo "${INCS}" > ${inc}
1224 ${cat} > ${makefile} << \!
1225 .SUFFIXES: .o .c .x .y
1226 .c.o:
1227         $(CC) -I./ $(XINCS) $(CFLAGS) -c $(<)
1228 .c.x:
1229         $(CC) -I./ $(XINCS) -E $(<) > $(@)
1230 .c:
1231         $(CC) -I./ $(XINCS) $(CFLAGS) $(LDFLAGS) -o $(@) $(<) $(XLIBS)
1232 !
1233
1234 ## Generics
1235
1236 # May be multiline..
1237 [ -n "${OS_DEFINES}" ] && printf -- "${OS_DEFINES}" >> ${h}
1238
1239 feat_def ALWAYS_UNICODE_LOCALE
1240 feat_def AMALGAMATION
1241 feat_def CROSS_BUILD
1242 feat_def DEBUG
1243 feat_def DEVEL
1244 feat_def DOCSTRINGS
1245 feat_def ERRORS
1246 feat_def NYD2
1247 feat_def NOMEMDBG
1248
1249 if xrun_check inline 'inline functions' \
1250    '#define HAVE_INLINE
1251    #define n_INLINE static inline' << \!
1252 static inline int ilf(int i){return ++i;}
1253 int main(void){return ilf(-1);}
1254 !
1255 then
1256    :
1257 elif xrun_check inline 'inline functions (via __inline)' \
1258    '#define HAVE_INLINE
1259    #define n_INLINE static __inline' << \!
1260 static __inline int ilf(int i){return ++i;}
1261 int main(void){return ilf(-1);}
1262 !
1263 then
1264    :
1265 fi
1266
1267 ## Test for "basic" system-calls / functionality that is used by all parts
1268 ## of our program.  Once this is done fork away BASE_LIBS and other BASE_*
1269 ## macros to be used by only the subprograms (potentially).
1270
1271 if run_check clock_gettime 'clock_gettime(2)' \
1272    '#define HAVE_CLOCK_GETTIME' << \!
1273 #include <time.h>
1274 # include <errno.h>
1275 int main(void){
1276    struct timespec ts;
1277
1278    if(!clock_gettime(CLOCK_REALTIME, &ts) || errno != ENOSYS)
1279       return 0;
1280    return 1;
1281 }
1282 !
1283 then
1284    :
1285 elif run_check clock_gettime 'clock_gettime(2) (via -lrt)' \
1286    '#define HAVE_CLOCK_GETTIME' '-lrt' << \!
1287 #include <time.h>
1288 # include <errno.h>
1289 int main(void){
1290    struct timespec ts;
1291
1292    if(!clock_gettime(CLOCK_REALTIME, &ts) || errno != ENOSYS)
1293       return 0;
1294    return 1;
1295 }
1296 !
1297 then
1298    :
1299 elif run_check gettimeofday 'gettimeofday(2)' \
1300    '#define HAVE_GETTIMEOFDAY' << \!
1301 #include <stdio.h> /* For C89 NULL */
1302 #include <sys/time.h>
1303 # include <errno.h>
1304 int main(void){
1305    struct timeval tv;
1306
1307    if(!gettimeofday(&tv, NULL) || errno != ENOSYS)
1308       return 0;
1309    return 1;
1310 }
1311 !
1312 then
1313    :
1314 else
1315    have_no_subsecond_time=1
1316 fi
1317
1318 if run_check nanosleep 'nanosleep(2)' \
1319    '#define HAVE_NANOSLEEP' << \!
1320 #include <time.h>
1321 # include <errno.h>
1322 int main(void){
1323    struct timespec ts;
1324
1325    ts.tv_sec = 1;
1326    ts.tv_nsec = 100000;
1327    if(!nanosleep(&ts, NULL) || errno != ENOSYS)
1328       return 0;
1329    return 1;
1330 }
1331 !
1332 then
1333    :
1334 elif run_check nanosleep 'nanosleep(2) (via -lrt)' \
1335    '#define HAVE_NANOSLEEP' '-lrt' << \!
1336 #include <time.h>
1337 # include <errno.h>
1338 int main(void){
1339    struct timespec ts;
1340
1341    ts.tv_sec = 1;
1342    ts.tv_nsec = 100000;
1343    if(!nanosleep(&ts, NULL) || errno != ENOSYS)
1344       return 0;
1345    return 1;
1346 }
1347 !
1348 then
1349    :
1350 # link_check is enough for this, that function is so old, trust the proto
1351 elif link_check sleep 'sleep(3)' \
1352    '#define HAVE_SLEEP' << \!
1353 #include <unistd.h>
1354 # include <errno.h>
1355 int main(void){
1356    if(!sleep(1) || errno != ENOSYS)
1357       return 0;
1358    return 1;
1359 }
1360 !
1361 then
1362    :
1363 else
1364    msg 'ERROR: we require one of nanosleep(2) and sleep(3).'
1365    config_exit 1
1366 fi
1367
1368 if run_check userdb 'gete?[gu]id(2), getpwuid(3), getpwnam(3)' << \!
1369 #include <pwd.h>
1370 #include <unistd.h>
1371 # include <errno.h>
1372 int main(void){
1373    struct passwd *pw;
1374    gid_t gid;
1375    uid_t uid;
1376
1377    if((gid = getgid()) != 0)
1378       gid = getegid();
1379    if((uid = getuid()) != 0)
1380       uid = geteuid();
1381    if((pw = getpwuid(uid)) == NULL && errno == ENOSYS)
1382       return 1;
1383    if((pw = getpwnam("root")) == NULL && errno == ENOSYS)
1384       return 1;
1385    return 0;
1386 }
1387 !
1388 then
1389    :
1390 else
1391    msg 'ERROR: we require user and group info / database searches.'
1392    msg 'That much Unix we indulge ourselfs.'
1393    config_exit 1
1394 fi
1395
1396 if link_check ftruncate 'ftruncate(2)' \
1397    '#define HAVE_FTRUNCATE' << \!
1398 #include <unistd.h>
1399 #include <sys/types.h>
1400 int main(void){
1401    return (ftruncate(0, 0) != 0);
1402 }
1403 !
1404 then
1405    :
1406 else
1407    msg 'ERROR: we require the ftruncate(2) system call.'
1408    config_exit 1
1409 fi
1410
1411 if run_check sa_restart 'SA_RESTART (for sigaction(2))' << \!
1412 #include <signal.h>
1413 # include <errno.h>
1414 int main(void){
1415    struct sigaction nact, oact;
1416
1417    nact.sa_handler = SIG_DFL;
1418    sigemptyset(&nact.sa_mask);
1419    nact.sa_flags = SA_RESTART;
1420    return !(!sigaction(SIGCHLD, &nact, &oact) || errno != ENOSYS);
1421 }
1422 !
1423 then
1424    :
1425 else
1426    msg 'ERROR: we (yet) require the SA_RESTART flag for sigaction(2).'
1427    config_exit 1
1428 fi
1429
1430 if link_check snprintf 'snprintf(3)' << \!
1431 #include <stdio.h>
1432 int main(void){
1433    char b[20];
1434
1435    snprintf(b, sizeof b, "%s", "string");
1436    return 0;
1437 }
1438 !
1439 then
1440    :
1441 else
1442    msg 'ERROR: we require the snprintf(3) function.'
1443    config_exit 1
1444 fi
1445
1446 if link_check environ 'environ(3)' << \!
1447 #include <stdio.h> /* For C89 NULL */
1448 int main(void){
1449    extern char **environ;
1450
1451    return environ[0] == NULL;
1452 }
1453 !
1454 then
1455    :
1456 else
1457    msg 'ERROR: we require the environ(3) array for subprocess control.'
1458    config_exit 1
1459 fi
1460
1461 if link_check setenv '(un)?setenv(3)' '#define HAVE_SETENV' << \!
1462 #include <stdlib.h>
1463 int main(void){
1464    setenv("s-mailx", "i want to see it cute!", 1);
1465    unsetenv("s-mailx");
1466    return 0;
1467 }
1468 !
1469 then
1470    :
1471 elif link_check setenv 'putenv(3)' '#define HAVE_PUTENV' << \!
1472 #include <stdlib.h>
1473 int main(void){
1474    putenv("s-mailx=i want to see it cute!");
1475    return 0;
1476 }
1477 !
1478 then
1479    :
1480 else
1481    msg 'ERROR: we require either the setenv(3) or putenv(3) functions.'
1482    config_exit 1
1483 fi
1484
1485 if link_check termios 'termios.h and tc*(3) family' << \!
1486 #include <termios.h>
1487 int main(void){
1488    struct termios tios;
1489
1490    tcgetattr(0, &tios);
1491    tcsetattr(0, TCSANOW | TCSADRAIN | TCSAFLUSH, &tios);
1492    return 0;
1493 }
1494 !
1495 then
1496    :
1497 else
1498    msg 'ERROR: we require termios.h and the tc*() family of functions.'
1499    msg 'That much Unix we indulge ourselfs.'
1500    config_exit 1
1501 fi
1502
1503 ## optional stuff
1504
1505 if link_check vsnprintf 'vsnprintf(3)' << \!
1506 #include <stdarg.h>
1507 #include <stdio.h>
1508 static void dome(char *buf, size_t blen, ...){
1509    va_list ap;
1510
1511    va_start(ap, blen);
1512    vsnprintf(buf, blen, "%s", ap);
1513    va_end(ap);
1514 }
1515 int main(void){
1516    char b[20];
1517
1518    dome(b, sizeof b, "string");
1519    return 0;
1520 }
1521 !
1522 then
1523    :
1524 else
1525    feat_bail_required ERRORS
1526 fi
1527
1528 if [ "${have_vsnprintf}" = yes ]; then
1529    __va_copy() {
1530       link_check va_copy "va_copy(3) (as ${2})" \
1531          "#define HAVE_N_VA_COPY
1532 #define n_va_copy ${2}" <<_EOT
1533 #include <stdarg.h>
1534 #include <stdio.h>
1535 #if ${1}
1536 # if defined __va_copy && !defined va_copy
1537 #  define va_copy __va_copy
1538 # endif
1539 #endif
1540 static void dome2(char *buf, size_t blen, va_list src){
1541    va_list ap;
1542
1543    va_copy(ap, src);
1544    vsnprintf(buf, blen, "%s", ap);
1545    va_end(ap);
1546 }
1547 static void dome(char *buf, size_t blen, ...){
1548    va_list ap;
1549
1550    va_start(ap, blen);
1551    dome2(buf, blen, ap);
1552    va_end(ap);
1553 }
1554 int main(void){
1555    char b[20];
1556
1557    dome(b, sizeof b, "string");
1558    return 0;
1559 }
1560 _EOT
1561    }
1562    __va_copy 0 va_copy || __va_copy 1 __va_copy
1563 fi
1564
1565 run_check pathconf 'f?pathconf(2)' '#define HAVE_PATHCONF' << \!
1566 #include <unistd.h>
1567 #include <errno.h>
1568 int main(void){
1569    int rv = 0;
1570
1571    errno = 0;
1572    rv |= !(pathconf(".", _PC_NAME_MAX) >= 0 || errno == 0 || errno != ENOSYS);
1573    errno = 0;
1574    rv |= !(pathconf(".", _PC_PATH_MAX) >= 0 || errno == 0 || errno != ENOSYS);
1575
1576    /* Only link check */
1577    fpathconf(0, _PC_NAME_MAX);
1578
1579    return rv;
1580 }
1581 !
1582
1583 run_check pipe2 'pipe2(2)' '#define HAVE_PIPE2' << \!
1584 #include <fcntl.h>
1585 #include <unistd.h>
1586 # include <errno.h>
1587 int main(void){
1588    int fds[2];
1589
1590    if(!pipe2(fds, O_CLOEXEC) || errno != ENOSYS)
1591       return 0;
1592    return 1;
1593 }
1594 !
1595
1596 # We use this only then for now (need NOW+1)
1597 run_check utimensat 'utimensat(2)' '#define HAVE_UTIMENSAT' << \!
1598 #include <fcntl.h> /* For AT_* */
1599 #include <sys/stat.h>
1600 # include <errno.h>
1601 int main(void){
1602    struct timespec ts[2];
1603
1604    ts[0].tv_nsec = UTIME_NOW;
1605    ts[1].tv_nsec = UTIME_OMIT;
1606    if(!utimensat(AT_FDCWD, "", ts, 0) || errno != ENOSYS)
1607       return 0;
1608    return 1;
1609 }
1610 !
1611
1612 ##
1613
1614 # XXX Add POSIX check once standardized
1615 if link_check posix_random 'arc4random(3)' '#define HAVE_POSIX_RANDOM 0' << \!
1616 #include <stdlib.h>
1617 int main(void){
1618    arc4random();
1619    return 0;
1620 }
1621 !
1622 then
1623    :
1624 elif link_check getrandom 'getrandom(2) (in sys/random.h)' \
1625       '#define HAVE_GETRANDOM(B,S) getrandom(B, S, 0)
1626       #define HAVE_GETRANDOM_HEADER <sys/random.h>' <<\!
1627 #include <sys/random.h>
1628 int main(void){
1629    char buf[256];
1630    getrandom(buf, sizeof buf, 0);
1631    return 0;
1632 }
1633 !
1634 then
1635    :
1636 elif link_check getrandom 'getrandom(2) (via syscall(2))' \
1637       '#define HAVE_GETRANDOM(B,S) syscall(SYS_getrandom, B, S, 0)
1638       #define HAVE_GETRANDOM_HEADER <sys/syscall.h>' <<\!
1639 #include <sys/syscall.h>
1640 int main(void){
1641    char buf[256];
1642    syscall(SYS_getrandom, buf, sizeof buf, 0);
1643    return 0;
1644 }
1645 !
1646 then
1647    :
1648 elif [ -n "${have_no_subsecond_time}" ]; then
1649    msg 'ERROR: %s %s' 'without a native random' \
1650       'one of clock_gettime(2) and gettimeofday(2) is required.'
1651    config_exit 1
1652 fi
1653
1654
1655 link_check putc_unlocked 'putc_unlocked(3)' '#define HAVE_PUTC_UNLOCKED' <<\!
1656 #include <stdio.h>
1657 int main(void){
1658    putc_unlocked('@', stdout);
1659    return 0;
1660 }
1661 !
1662
1663 link_check fchdir 'fchdir(3)' '#define HAVE_FCHDIR' << \!
1664 #include <unistd.h>
1665 int main(void){
1666    fchdir(0);
1667    return 0;
1668 }
1669 !
1670
1671 if run_check realpath 'realpath(3)' '#define HAVE_REALPATH' << \!
1672 #include <stdlib.h>
1673 int main(void){
1674    char x_buf[4096], *x = realpath(".", x_buf);
1675
1676    return (x != NULL) ? 0 : 1;
1677 }
1678 !
1679 then
1680    if run_check realpath_malloc 'realpath(3) takes NULL' \
1681          '#define HAVE_REALPATH_NULL' << \!
1682 #include <stdlib.h>
1683 int main(void){
1684    char *x = realpath(".", NULL);
1685
1686    if(x != NULL)
1687       free(x);
1688    return (x != NULL) ? 0 : 1;
1689 }
1690 !
1691    then
1692       :
1693    fi
1694 fi
1695
1696 ## optional and selectable
1697
1698 if feat_yes DOTLOCK; then
1699    if run_check readlink 'readlink(2)' << \!
1700 #include <unistd.h>
1701 # include <errno.h>
1702 int main(void){
1703    char buf[128];
1704
1705    if(!readlink("here", buf, sizeof buf) || errno != ENOSYS)
1706       return 0;
1707    return 1;
1708 }
1709 !
1710    then
1711       :
1712    else
1713       feat_bail_required DOTLOCK
1714    fi
1715 fi
1716
1717 if feat_yes DOTLOCK; then
1718    if run_check fchown 'fchown(2)' << \!
1719 #include <unistd.h>
1720 # include <errno.h>
1721 int main(void){
1722    if(!fchown(0, 0, 0) || errno != ENOSYS)
1723       return 0;
1724    return 1;
1725 }
1726 !
1727    then
1728       :
1729    else
1730       feat_bail_required DOTLOCK
1731    fi
1732 fi
1733
1734 ## Now it is the time to fork away the BASE_ series
1735
1736 ${rm} -f ${tmp}
1737 squeeze_em ${inc} ${tmp}
1738 ${mv} ${tmp} ${inc}
1739 squeeze_em ${lib} ${tmp}
1740 ${mv} ${tmp} ${lib}
1741
1742 echo "BASE_LIBS = `${cat} ${lib}`" >> ${mk}
1743 echo "BASE_INCS = `${cat} ${inc}`" >> ${mk}
1744
1745 ## The remains are expected to be used only by the main MUA binary!
1746
1747 OPT_LOCALES=0
1748 link_check setlocale 'setlocale(3)' '#define HAVE_SETLOCALE' << \!
1749 #include <locale.h>
1750 int main(void){
1751    setlocale(LC_ALL, "");
1752    return 0;
1753 }
1754 !
1755 [ -n "${have_setlocale}" ] && OPT_LOCALES=1
1756
1757 OPT_MULTIBYTE_CHARSETS=0
1758 OPT_WIDE_GLYPHS=0
1759 OPT_TERMINAL_CHARSET=0
1760 if [ -n "${have_setlocale}" ]; then
1761    link_check c90amend1 'ISO/IEC 9899:1990/Amendment 1:1995' \
1762       '#define HAVE_C90AMEND1' << \!
1763 #include <limits.h>
1764 #include <stdlib.h>
1765 #include <wchar.h>
1766 #include <wctype.h>
1767 int main(void){
1768    char mbb[MB_LEN_MAX + 1];
1769    wchar_t wc;
1770
1771    iswprint(L'c');
1772    towupper(L'c');
1773    mbtowc(&wc, "x", 1);
1774    mbrtowc(&wc, "x", 1, NULL);
1775    wctomb(mbb, wc);
1776    return (mblen("\0", 1) == 0);
1777 }
1778 !
1779    [ -n "${have_c90amend1}" ] && OPT_MULTIBYTE_CHARSETS=1
1780
1781    if [ -n "${have_c90amend1}" ]; then
1782       link_check wcwidth 'wcwidth(3)' '#define HAVE_WCWIDTH' << \!
1783 #include <wchar.h>
1784 int main(void){
1785    wcwidth(L'c');
1786    return 0;
1787 }
1788 !
1789       [ -n "${have_wcwidth}" ] && OPT_WIDE_GLYPHS=1
1790    fi
1791
1792    link_check nl_langinfo 'nl_langinfo(3)' '#define HAVE_NL_LANGINFO' << \!
1793 #include <langinfo.h>
1794 #include <stdlib.h>
1795 int main(void){
1796    nl_langinfo(DAY_1);
1797    return (nl_langinfo(CODESET) == NULL);
1798 }
1799 !
1800    [ -n "${have_nl_langinfo}" ] && OPT_TERMINAL_CHARSET=1
1801 fi # have_setlocale
1802
1803 link_check fnmatch 'fnmatch(3)' '#define HAVE_FNMATCH' << \!
1804 #include <fnmatch.h>
1805 int main(void){
1806    return (fnmatch("*", ".", FNM_PATHNAME | FNM_PERIOD) == FNM_NOMATCH);
1807 }
1808 !
1809
1810 link_check dirent_d_type 'struct dirent.d_type' '#define HAVE_DIRENT_TYPE' << \!
1811 #include <dirent.h>
1812 int main(void){
1813    struct dirent de;
1814    return !(de.d_type == DT_UNKNOWN ||
1815       de.d_type == DT_DIR || de.d_type == DT_LNK);
1816 }
1817 !
1818
1819 ## optional and selectable
1820
1821 if feat_yes ICONV; then
1822    ${cat} > ${tmp2}.c << \!
1823 #include <stdio.h> /* For C89 NULL */
1824 #include <iconv.h>
1825 int main(void){
1826    iconv_t id;
1827
1828    id = iconv_open("foo", "bar");
1829    iconv(id, NULL, NULL, NULL, NULL);
1830    iconv_close(id);
1831    return 0;
1832 }
1833 !
1834    < ${tmp2}.c link_check iconv 'iconv(3) functionality' \
1835          '#define HAVE_ICONV' ||
1836       < ${tmp2}.c link_check iconv 'iconv(3) functionality (via -liconv)' \
1837          '#define HAVE_ICONV' '-liconv' ||
1838       feat_bail_required ICONV
1839 else
1840    echo '/* OPT_ICONV=0 */' >> ${h}
1841 fi # feat_yes ICONV
1842
1843 if feat_yes SOCKETS || feat_yes SPAM_SPAMD; then
1844    ${cat} > ${tmp2}.c << \!
1845 #include <sys/types.h>
1846 #include <sys/socket.h>
1847 #include <sys/un.h>
1848 # include <errno.h>
1849 int main(void){
1850    struct sockaddr_un soun;
1851
1852    if(socket(AF_UNIX, SOCK_STREAM, 0) == -1 && errno == ENOSYS)
1853       return 1;
1854    if(connect(0, (struct sockaddr*)&soun, 0) == -1 && errno == ENOSYS)
1855       return 1;
1856    if(shutdown(0, SHUT_RD | SHUT_WR | SHUT_RDWR) == -1 && errno == ENOSYS)
1857       return 1;
1858    return 0;
1859 }
1860 !
1861
1862    < ${tmp2}.c run_check af_unix 'AF_UNIX sockets' \
1863          '#define HAVE_UNIX_SOCKETS' ||
1864       < ${tmp2}.c run_check af_unix 'AF_UNIX sockets (via -lnsl)' \
1865          '#define HAVE_UNIX_SOCKETS' '-lnsl' ||
1866       < ${tmp2}.c run_check af_unix 'AF_UNIX sockets (via -lsocket -lnsl)' \
1867          '#define HAVE_UNIX_SOCKETS' '-lsocket -lnsl'
1868 fi
1869
1870 if feat_yes SOCKETS; then
1871    ${cat} > ${tmp2}.c << \!
1872 #include "config.h"
1873 #include <sys/types.h>
1874 #include <sys/socket.h>
1875 #include <netinet/in.h>
1876 # include <errno.h>
1877 int main(void){
1878    struct sockaddr s;
1879
1880    if(socket(AF_INET, SOCK_STREAM, 0) == -1 && errno == ENOSYS)
1881       return 1;
1882    if(connect(0, &s, 0) == -1 && errno == ENOSYS)
1883       return 1;
1884    return 0;
1885 }
1886 !
1887
1888    < ${tmp2}.c run_check sockets 'sockets' \
1889          '#define HAVE_SOCKETS' ||
1890       < ${tmp2}.c run_check sockets 'sockets (via -lnsl)' \
1891          '#define HAVE_SOCKETS' '-lnsl' ||
1892       < ${tmp2}.c run_check sockets 'sockets (via -lsocket -lnsl)' \
1893          '#define HAVE_SOCKETS' '-lsocket -lnsl' ||
1894       feat_bail_required SOCKETS
1895 else
1896    echo '/* OPT_SOCKETS=0 */' >> ${h}
1897 fi # feat_yes SOCKETS
1898
1899 if feat_yes SOCKETS; then
1900    link_check getaddrinfo 'getaddrinfo(3)' \
1901       '#define HAVE_GETADDRINFO' << \!
1902 #include "config.h"
1903 #include <sys/types.h>
1904 #include <sys/socket.h>
1905 #include <stdio.h>
1906 #include <netdb.h>
1907 int main(void){
1908    struct addrinfo a, *ap;
1909    int lrv;
1910
1911    switch((lrv = getaddrinfo("foo", "0", &a, &ap))){
1912    case EAI_NONAME:
1913    case EAI_SERVICE:
1914    default:
1915       fprintf(stderr, "%s\n", gai_strerror(lrv));
1916    case 0:
1917       break;
1918    }
1919    return 0;
1920 }
1921 !
1922 fi
1923
1924 if feat_yes SOCKETS && [ -z "${have_getaddrinfo}" ]; then
1925    compile_check arpa_inet_h '<arpa/inet.h>' \
1926       '#define HAVE_ARPA_INET_H' << \!
1927 #include "config.h"
1928 #include <sys/types.h>
1929 #include <sys/socket.h>
1930 #include <netdb.h>
1931 #include <netinet/in.h>
1932 #include <arpa/inet.h>
1933 !
1934
1935    ${cat} > ${tmp2}.c << \!
1936 #include "config.h"
1937 #include <sys/types.h>
1938 #include <sys/socket.h>
1939 #include <stdio.h>
1940 #include <string.h>
1941 #include <netdb.h>
1942 #include <netinet/in.h>
1943 #ifdef HAVE_ARPA_INET_H
1944 #include <arpa/inet.h>
1945 #endif
1946 int main(void){
1947    struct sockaddr_in servaddr;
1948    unsigned short portno;
1949    struct servent *ep;
1950    struct hostent *hp;
1951    struct in_addr **pptr;
1952
1953    portno = 0;
1954    if((ep = getservbyname("POPPY-PORT", "tcp")) != NULL)
1955       portno = (unsigned short)ep->s_port;
1956
1957    if((hp = gethostbyname("POPPY-HOST")) != NULL){
1958       pptr = (struct in_addr**)hp->h_addr_list;
1959       if(hp->h_addrtype != AF_INET)
1960          fprintf(stderr, "au\n");
1961    }else{
1962       switch(h_errno){
1963       case HOST_NOT_FOUND:
1964       case TRY_AGAIN:
1965       case NO_RECOVERY:
1966       case NO_DATA:
1967          break;
1968       default:
1969          fprintf(stderr, "au\n");
1970          break;
1971       }
1972    }
1973
1974    memset(&servaddr, 0, sizeof servaddr);
1975    servaddr.sin_family = AF_INET;
1976    servaddr.sin_port = htons(portno);
1977    memcpy(&servaddr.sin_addr, *pptr, sizeof(struct in_addr));
1978    fprintf(stderr, "Would connect to %s:%d ...\n",
1979       inet_ntoa(**pptr), (int)portno);
1980    return 0;
1981 }
1982 !
1983
1984    < ${tmp2}.c link_check gethostbyname 'get(serv|host)byname(3)' ||
1985       < ${tmp2}.c link_check gethostbyname \
1986          'get(serv|host)byname(3) (via -nsl)' '' '-lnsl' ||
1987       < ${tmp2}.c link_check gethostbyname \
1988          'get(serv|host)byname(3) (via -lsocket -nsl)' \
1989          '' '-lsocket -lnsl' ||
1990       feat_bail_required SOCKETS
1991 fi
1992
1993 feat_yes SOCKETS &&
1994 run_check setsockopt 'setsockopt(2)' '#define HAVE_SETSOCKOPT' << \!
1995 #include <sys/socket.h>
1996 #include <stdlib.h>
1997 # include <errno.h>
1998 int main(void){
1999    int sockfd = 3;
2000
2001    if(setsockopt(sockfd, SOL_SOCKET, SO_KEEPALIVE, NULL, 0) == -1 &&
2002          errno == ENOSYS)
2003       return 1;
2004    return 0;
2005 }
2006 !
2007
2008 feat_yes SOCKETS && [ -n "${have_setsockopt}" ] &&
2009 link_check so_sndtimeo 'SO_SNDTIMEO' '#define HAVE_SO_SNDTIMEO' << \!
2010 #include <sys/socket.h>
2011 #include <stdlib.h>
2012 int main(void){
2013    struct timeval tv;
2014    int sockfd = 3;
2015
2016    tv.tv_sec = 42;
2017    tv.tv_usec = 21;
2018    setsockopt(sockfd, SOL_SOCKET, SO_SNDTIMEO, &tv, sizeof tv);
2019    setsockopt(sockfd, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof tv);
2020    return 0;
2021 }
2022 !
2023
2024 feat_yes SOCKETS && [ -n "${have_setsockopt}" ] &&
2025 link_check so_linger 'SO_LINGER' '#define HAVE_SO_LINGER' << \!
2026 #include <sys/socket.h>
2027 #include <stdlib.h>
2028 int main(void){
2029    struct linger li;
2030    int sockfd = 3;
2031
2032    li.l_onoff = 1;
2033    li.l_linger = 42;
2034    setsockopt(sockfd, SOL_SOCKET, SO_LINGER, &li, sizeof li);
2035    return 0;
2036 }
2037 !
2038
2039 if feat_yes SSL; then # {{{
2040    # {{{ LibreSSL decided to define OPENSSL_VERSION_NUMBER with a useless value
2041    # instead of keeping it at the one that corresponds to the OpenSSL at fork
2042    # time: we need to test it first in order to get things right
2043    if compile_check _xssl 'TLS/SSL (LibreSSL)' \
2044       '#define HAVE_SSL
2045       #define HAVE_XSSL
2046       #define HAVE_XSSL_RESSL
2047       #define HAVE_XSSL_OPENSSL 0' << \!
2048 #include <openssl/opensslv.h>
2049 #ifdef LIBRESSL_VERSION_NUMBER
2050 #else
2051 # error nope
2052 #endif
2053 !
2054    then
2055       ossl_v1_1=
2056    # TODO OPENSSL_IS_BORINGSSL, but never tried that one!
2057    elif compile_check _xssl 'TLS/SSL (OpenSSL >= v1.1.0)' \
2058       '#define HAVE_SSL
2059       #define HAVE_XSSL
2060       #define HAVE_XSSL_OPENSSL 0x10100' << \!
2061 #include <openssl/opensslv.h>
2062 #if OPENSSL_VERSION_NUMBER + 0 >= 0x10100000L
2063 #else
2064 # error nope
2065 #endif
2066 !
2067    then
2068       ossl_v1_1=1
2069    elif compile_check _xssl 'TLS/SSL (OpenSSL)' \
2070       '#define HAVE_SSL
2071       #define HAVE_XSSL
2072       #define HAVE_XSSL_OPENSSL 0x10000' << \!
2073 #include <openssl/opensslv.h>
2074 #ifdef OPENSSL_VERSION_NUMBER
2075 #else
2076 # error nope
2077 #endif
2078 !
2079    then
2080       ossl_v1_1=
2081    else
2082       feat_bail_required SSL
2083    fi # }}}
2084
2085    if feat_yes SSL; then # {{{
2086       if [ -n "${ossl_v1_1}" ]; then
2087          without_check yes xssl 'TLS/SSL (new style *_client_method(3ssl))' \
2088             '#define n_XSSL_CLIENT_METHOD TLS_client_method' \
2089             '-lssl -lcrypto'
2090       elif link_check xssl 'TLS/SSL (new style *_client_method(3ssl))' \
2091             '#define n_XSSL_CLIENT_METHOD TLS_client_method' \
2092             '-lssl -lcrypto' << \!
2093 #include <openssl/ssl.h>
2094 #include <openssl/err.h>
2095 #include <openssl/x509v3.h>
2096 #include <openssl/x509.h>
2097 #include <openssl/rand.h>
2098 #ifdef OPENSSL_NO_TLS1 /* TODO only deduced from OPENSSL_NO_SSL[23]! */
2099 # error We need TLSv1.
2100 #endif
2101 int main(void){
2102    SSL_CTX *ctx = SSL_CTX_new(TLS_client_method());
2103
2104    SSL_CTX_free(ctx);
2105    PEM_read_PrivateKey(0, 0, 0, 0);
2106    return 0;
2107 }
2108 !
2109       then
2110          :
2111       elif link_check xssl 'TLS/SSL (old style *_client_method(3ssl))' \
2112             '#define n_XSSL_CLIENT_METHOD SSLv23_client_method' \
2113             '-lssl -lcrypto' << \!
2114 #include <openssl/ssl.h>
2115 #include <openssl/err.h>
2116 #include <openssl/x509v3.h>
2117 #include <openssl/x509.h>
2118 #include <openssl/rand.h>
2119 #if defined OPENSSL_NO_SSL3 &&\
2120       defined OPENSSL_NO_TLS1 /* TODO only deduced from OPENSSL_NO_SSL[23]! */
2121 # error We need one of SSLv3 and TLSv1.
2122 #endif
2123 int main(void){
2124    SSL_CTX *ctx = SSL_CTX_new(SSLv23_client_method());
2125
2126    SSL_CTX_free(ctx);
2127    PEM_read_PrivateKey(0, 0, 0, 0);
2128    return 0;
2129 }
2130 !
2131       then
2132          :
2133       else
2134          feat_bail_required SSL
2135       fi
2136    fi # }}}
2137
2138    if feat_yes SSL; then # {{{
2139       if [ -n "${ossl_v1_1}" ]; then
2140          without_check yes xssl_stack_of 'TLS/SSL STACK_OF()' \
2141             '#define HAVE_XSSL_STACK_OF'
2142       elif compile_check xssl_stack_of 'TLS/SSL STACK_OF()' \
2143             '#define HAVE_XSSL_STACK_OF' << \!
2144 #include <stdio.h> /* For C89 NULL */
2145 #include <openssl/ssl.h>
2146 #include <openssl/err.h>
2147 #include <openssl/x509v3.h>
2148 #include <openssl/x509.h>
2149 #include <openssl/rand.h>
2150 int main(void){
2151    STACK_OF(GENERAL_NAME) *gens = NULL;
2152
2153    printf("%p", gens); /* to use it */
2154    return 0;
2155 }
2156 !
2157       then
2158          :
2159       fi
2160
2161       if [ -n "${ossl_v1_1}" ]; then
2162          without_check yes xssl_conf 'TLS/SSL OpenSSL_modules_load_file()' \
2163             '#define HAVE_XSSL_CONFIG'
2164       elif link_check xssl_conf 'TLS/SSL OpenSSL_modules_load_file() support' \
2165             '#define HAVE_XSSL_CONFIG' << \!
2166 #include <stdio.h> /* For C89 NULL */
2167 #include <openssl/conf.h>
2168 int main(void){
2169    CONF_modules_load_file(NULL, NULL, CONF_MFLAGS_IGNORE_MISSING_FILE);
2170    CONF_modules_free();
2171    return 0;
2172 }
2173 !
2174       then
2175          :
2176       fi
2177
2178       if [ -n "${ossl_v1_1}" ]; then
2179          without_check yes xssl_conf_ctx 'TLS/SSL SSL_CONF_CTX support' \
2180             '#define HAVE_XSSL_CONF_CTX'
2181       elif link_check xssl_conf_ctx 'TLS/SSL SSL_CONF_CTX support' \
2182          '#define HAVE_XSSL_CONF_CTX' << \!
2183 #include "config.h"
2184 #include <openssl/ssl.h>
2185 #include <openssl/err.h>
2186 int main(void){
2187    SSL_CTX *ctx = SSL_CTX_new(n_XSSL_CLIENT_METHOD());
2188    SSL_CONF_CTX *cctx = SSL_CONF_CTX_new();
2189
2190    SSL_CONF_CTX_set_flags(cctx,
2191       SSL_CONF_FLAG_FILE | SSL_CONF_FLAG_CLIENT |
2192       SSL_CONF_FLAG_CERTIFICATE | SSL_CONF_FLAG_SHOW_ERRORS);
2193    SSL_CONF_CTX_set_ssl_ctx(cctx, ctx);
2194    SSL_CONF_cmd(cctx, "Protocol", "ALL");
2195    SSL_CONF_CTX_finish(cctx);
2196    SSL_CONF_CTX_free(cctx);
2197    SSL_CTX_free(ctx);
2198    return 0;
2199 }
2200 !
2201       then
2202          :
2203       fi
2204
2205       if [ -n "${ossl_v1_1}" ]; then
2206          without_check no xssl_rand_egd 'TLS/SSL RAND_egd(3ssl)' \
2207             '#define HAVE_XSSL_RAND_EGD'
2208       elif link_check xssl_rand_egd 'TLS/SSL RAND_egd(3ssl)' \
2209             '#define HAVE_XSSL_RAND_EGD' << \!
2210 #include <openssl/rand.h>
2211 int main(void){
2212    return RAND_egd("some.where") > 0;
2213 }
2214 !
2215       then
2216          :
2217       fi
2218
2219       if feat_yes SSL_ALL_ALGORITHMS; then
2220          if [ -n "${ossl_v1_1}" ]; then
2221             without_check yes ssl_all_algo 'TLS/SSL all-algorithms support' \
2222                '#define HAVE_SSL_ALL_ALGORITHMS'
2223          elif link_check ssl_all_algo 'TLS/SSL all-algorithms support' \
2224             '#define HAVE_SSL_ALL_ALGORITHMS' << \!
2225 #include <openssl/evp.h>
2226 int main(void){
2227    OpenSSL_add_all_algorithms();
2228    EVP_get_cipherbyname("two cents i never exist");
2229    EVP_cleanup();
2230    return 0;
2231 }
2232 !
2233          then
2234             :
2235          else
2236             feat_bail_required SSL_ALL_ALGORITHMS
2237          fi
2238       fi
2239    fi # feat_yes SSL }}}
2240
2241    if feat_yes SSL && feat_yes MD5 && feat_no NOEXTMD5; then # {{{
2242       run_check ssl_md5 'MD5 digest in the used crypto library' \
2243             '#define HAVE_XSSL_MD5' << \!
2244 #include <stdlib.h>
2245 #include <string.h>
2246 #include <openssl/md5.h>
2247 int main(void){
2248    char const dat[] = "abrakadabrafidibus";
2249    char dig[16], hex[16 * 2];
2250    MD5_CTX ctx;
2251    size_t i, j;
2252
2253    memset(dig, 0, sizeof(dig));
2254    memset(hex, 0, sizeof(hex));
2255    MD5_Init(&ctx);
2256    MD5_Update(&ctx, dat, sizeof(dat) - 1);
2257    MD5_Final(dig, &ctx);
2258
2259 #define hexchar(n) ((n) > 9 ? (n) - 10 + 'a' : (n) + '0')
2260    for(i = 0; i < sizeof(hex) / 2; i++){
2261       j = i << 1;
2262       hex[j] = hexchar((dig[i] & 0xf0) >> 4);
2263       hex[++j] = hexchar(dig[i] & 0x0f);
2264    }
2265    return !!memcmp("6d7d0a3d949da2e96f2aa010f65d8326", hex, sizeof(hex));
2266 }
2267 !
2268    fi # }}}
2269 else
2270    echo '/* OPT_SSL=0 */' >> ${h}
2271 fi # }}} feat_yes SSL
2272
2273 if [ "${have_xssl}" = yes ]; then
2274    OPT_SMIME=1
2275 else
2276    OPT_SMIME=0
2277 fi
2278
2279 if feat_yes SMTP; then
2280    echo '#define HAVE_SMTP' >> ${h}
2281 else
2282    echo '/* OPT_SMTP=0 */' >> ${h}
2283 fi
2284
2285 if feat_yes POP3; then
2286    echo '#define HAVE_POP3' >> ${h}
2287 else
2288    echo '/* OPT_POP3=0 */' >> ${h}
2289 fi
2290
2291 if feat_yes GSSAPI; then
2292    ${cat} > ${tmp2}.c << \!
2293 #include <gssapi/gssapi.h>
2294 int main(void){
2295    gss_import_name(0, 0, GSS_C_NT_HOSTBASED_SERVICE, 0);
2296    gss_init_sec_context(0,0,0,0,0,0,0,0,0,0,0,0,0);
2297    return 0;
2298 }
2299 !
2300    ${sed} -e '1s/gssapi\///' < ${tmp2}.c > ${tmp3}.c
2301
2302    if command -v krb5-config >/dev/null 2>&1; then
2303       i=`command -v krb5-config`
2304       GSS_LIBS="`CFLAGS= ${i} --libs gssapi`"
2305       GSS_INCS="`CFLAGS= ${i} --cflags`"
2306       i='GSS-API via krb5-config(1)'
2307    else
2308       GSS_LIBS='-lgssapi'
2309       GSS_INCS=
2310       i='GSS-API in gssapi/gssapi.h, libgssapi'
2311    fi
2312    if < ${tmp2}.c link_check gss \
2313          "${i}" '#define HAVE_GSSAPI' "${GSS_LIBS}" "${GSS_INCS}" ||\
2314       < ${tmp3}.c link_check gss \
2315          'GSS-API in gssapi.h, libgssapi' \
2316          '#define HAVE_GSSAPI
2317          #define GSSAPI_REG_INCLUDE' \
2318          '-lgssapi' ||\
2319       < ${tmp2}.c link_check gss 'GSS-API in libgssapi_krb5' \
2320          '#define HAVE_GSSAPI' \
2321          '-lgssapi_krb5' ||\
2322       < ${tmp3}.c link_check gss \
2323          'GSS-API in libgssapi, OpenBSD-style (pre 5.3)' \
2324          '#define HAVE_GSSAPI
2325          #define GSS_REG_INCLUDE' \
2326          '-lgssapi -lkrb5 -lcrypto' \
2327          '-I/usr/include/kerberosV' ||\
2328       < ${tmp2}.c link_check gss 'GSS-API in libgss' \
2329          '#define HAVE_GSSAPI' \
2330          '-lgss' ||\
2331       link_check gss 'GSS-API in libgssapi_krb5, old-style' \
2332          '#define HAVE_GSSAPI
2333          #define GSSAPI_OLD_STYLE' \
2334          '-lgssapi_krb5' << \!
2335 #include <gssapi/gssapi.h>
2336 #include <gssapi/gssapi_generic.h>
2337 int main(void){
2338    gss_import_name(0, 0, gss_nt_service_name, 0);
2339    gss_init_sec_context(0,0,0,0,0,0,0,0,0,0,0,0,0);
2340    return 0;
2341 }
2342 !
2343    then
2344       :
2345    else
2346       feat_bail_required GSSAPI
2347    fi
2348 else
2349    echo '/* OPT_GSSAPI=0 */' >> ${h}
2350 fi # feat_yes GSSAPI
2351
2352 if feat_yes NETRC; then
2353    echo '#define HAVE_NETRC' >> ${h}
2354 else
2355    echo '/* OPT_NETRC=0 */' >> ${h}
2356 fi
2357
2358 if feat_yes AGENT; then
2359    echo '#define HAVE_AGENT' >> ${h}
2360 else
2361    echo '/* OPT_AGENT=0 */' >> ${h}
2362 fi
2363
2364 if feat_yes IDNA; then
2365    if link_check idna 'GNU Libidn' '#define HAVE_IDNA HAVE_IDNA_LIBIDNA' \
2366          '-lidn' << \!
2367 #include <idna.h>
2368 #include <idn-free.h>
2369 #include <stringprep.h>
2370 int main(void){
2371    char *utf8, *idna_ascii, *idna_utf8;
2372
2373    utf8 = stringprep_locale_to_utf8("does.this.work");
2374    if (idna_to_ascii_8z(utf8, &idna_ascii, IDNA_USE_STD3_ASCII_RULES)
2375          != IDNA_SUCCESS)
2376       return 1;
2377    idn_free(idna_ascii);
2378    /* (Rather link check only here) */
2379    idna_utf8 = stringprep_convert(idna_ascii, "UTF-8", "de_DE");
2380    return 0;
2381 }
2382 !
2383    then
2384       :
2385    elif link_check idna 'idnkit' '#define HAVE_IDNA HAVE_IDNA_IDNKIT' \
2386          '-lidnkit' << \!
2387 #include <stdio.h>
2388 #include <idn/api.h>
2389 #include <idn/result.h>
2390 int main(void){
2391    idn_result_t r;
2392    char ace_name[256];
2393    char local_name[256];
2394
2395    r = idn_encodename(IDN_ENCODE_APP, "does.this.work", ace_name,
2396          sizeof(ace_name));
2397    if (r != idn_success) {
2398       fprintf(stderr, "idn_encodename failed: %s\n", idn_result_tostring(r));
2399       return 1;
2400    }
2401    r = idn_decodename(IDN_DECODE_APP, ace_name, local_name, sizeof(local_name));
2402    if (r != idn_success) {
2403       fprintf(stderr, "idn_decodename failed: %s\n", idn_result_tostring(r));
2404       return 1;
2405    }
2406    return 0;
2407 }
2408 !
2409    then
2410       :
2411    else
2412       feat_bail_required IDNA
2413    fi
2414
2415    if [ -n "${have_idna}" ]; then
2416       echo '#define HAVE_IDNA_LIBIDNA 0' >> ${h}
2417       echo '#define HAVE_IDNA_IDNKIT 1' >> ${h}
2418    fi
2419 else
2420    echo '/* OPT_IDNA=0 */' >> ${h}
2421 fi
2422
2423 if feat_yes IMAP_SEARCH; then
2424    echo '#define HAVE_IMAP_SEARCH' >> ${h}
2425 else
2426    echo '/* OPT_IMAP_SEARCH=0 */' >> ${h}
2427 fi
2428
2429 if feat_yes REGEX; then
2430    if link_check regex 'regular expressions' '#define HAVE_REGEX' << \!
2431 #include <regex.h>
2432 #include <stdlib.h>
2433 int main(void){
2434    size_t xret;
2435    int status;
2436    regex_t re;
2437
2438    status = regcomp(&re, ".*bsd", REG_EXTENDED | REG_ICASE | REG_NOSUB);
2439    xret = regerror(status, &re, NULL, 0);
2440    status = regexec(&re, "plan9", 0,NULL, 0);
2441    regfree(&re);
2442    return !(status == REG_NOMATCH);
2443 }
2444 !
2445    then
2446       :
2447    else
2448       feat_bail_required REGEX
2449    fi
2450 else
2451    echo '/* OPT_REGEX=0 */' >> ${h}
2452 fi
2453
2454 if feat_yes MLE && [ -n "${have_c90amend1}" ]; then
2455    have_mle=1
2456    echo '#define HAVE_MLE' >> ${h}
2457 else
2458    feat_bail_required MLE
2459    echo '/* OPT_MLE=0 */' >> ${h}
2460 fi
2461
2462 # Generic have-a-line-editor switch for those who need it below
2463 if [ -n "${have_mle}" ]; then
2464    have_cle=1
2465 fi
2466
2467 if [ -n "${have_cle}" ] && feat_yes HISTORY; then
2468    echo '#define HAVE_HISTORY' >> ${h}
2469 else
2470    echo '/* OPT_HISTORY=0 */' >> ${h}
2471 fi
2472
2473 if [ -n "${have_mle}" ] && feat_yes KEY_BINDINGS; then
2474    echo '#define HAVE_KEY_BINDINGS' >> ${h}
2475 else
2476    echo '/* OPT_KEY_BINDINGS=0 */' >> ${h}
2477 fi
2478
2479 if feat_yes TERMCAP; then
2480    __termcaplib() {
2481       link_check termcap "termcap(5) (via ${4})" \
2482          "#define HAVE_TERMCAP${3}" "${1}" << _EOT
2483 #include <stdio.h>
2484 #include <stdlib.h>
2485 ${2}
2486 #include <term.h>
2487 #define UNCONST(P) ((void*)(unsigned long)(void const*)(P))
2488 static int my_putc(int c){return putchar(c);}
2489 int main(void){
2490    char buf[1024+512], cmdbuf[2048], *cpb, *r1;
2491    int r2 = OK, r3 = ERR;
2492
2493    tgetent(buf, getenv("TERM"));
2494    cpb = cmdbuf;
2495    r1 = tgetstr(UNCONST("cm"), &cpb);
2496    tgoto(r1, 1, 1);
2497    r2 = tgetnum(UNCONST("Co"));
2498    r3 = tgetflag(UNCONST("ut"));
2499    tputs("cr", 1, &my_putc);
2500    return (r1 == NULL || r2 == -1 || r3 == 0);
2501 }
2502 _EOT
2503    }
2504
2505    __terminfolib() {
2506       link_check terminfo "terminfo(5) (via ${2})" \
2507          '#define HAVE_TERMCAP
2508          #define HAVE_TERMCAP_CURSES
2509          #define HAVE_TERMINFO' "${1}" << _EOT
2510 #include <stdio.h>
2511 #include <curses.h>
2512 #include <term.h>
2513 #define UNCONST(P) ((void*)(unsigned long)(void const*)(P))
2514 static int my_putc(int c){return putchar(c);}
2515 int main(void){
2516    int er, r0, r1, r2;
2517    char *r3, *tp;
2518
2519    er = OK;
2520    r0 = setupterm(NULL, 1, &er);
2521    r1 = tigetflag(UNCONST("bce"));
2522    r2 = tigetnum(UNCONST("colors"));
2523    r3 = tigetstr(UNCONST("cr"));
2524    tp = tparm(r3, NULL, NULL, 0,0,0,0,0,0,0);
2525    tputs(tp, 1, &my_putc);
2526    return (r0 == ERR || r1 == -1 || r2 == -2 || r2 == -1 ||
2527       r3 == (char*)-1 || r3 == NULL);
2528 }
2529 _EOT
2530    }
2531
2532    if feat_yes TERMCAP_VIA_TERMINFO; then
2533       __terminfolib -ltinfo -ltinfo ||
2534          __terminfolib -lcurses -lcurses ||
2535          __terminfolib -lcursesw -lcursesw ||
2536          feat_bail_required TERMCAP_VIA_TERMINFO
2537    fi
2538
2539    if [ -z "${have_terminfo}" ]; then
2540       __termcaplib -ltermcap '' '' '-ltermcap' ||
2541          __termcaplib -ltermcap '#include <curses.h>' '
2542             #define HAVE_TERMCAP_CURSES' \
2543             'curses.h / -ltermcap' ||
2544          __termcaplib -lcurses '#include <curses.h>' '
2545             #define HAVE_TERMCAP_CURSES' \
2546             'curses.h / -lcurses' ||
2547          __termcaplib -lcursesw '#include <curses.h>' '
2548             #define HAVE_TERMCAP_CURSES' \
2549             'curses.h / -lcursesw' ||
2550          feat_bail_required TERMCAP
2551
2552       if [ -n "${have_termcap}" ]; then
2553          run_check tgetent_null \
2554             "tgetent(3) of termcap(5) takes NULL buffer" \
2555             "#define HAVE_TGETENT_NULL_BUF" << _EOT
2556 #include <stdio.h> /* For C89 NULL */
2557 #include <stdlib.h>
2558 #ifdef HAVE_TERMCAP_CURSES
2559 # include <curses.h>
2560 #endif
2561 #include <term.h>
2562 int main(void){
2563    tgetent(NULL, getenv("TERM"));
2564    return 0;
2565 }
2566 _EOT
2567       fi
2568    fi
2569 else
2570    echo '/* OPT_TERMCAP=0 */' >> ${h}
2571    echo '/* OPT_TERMCAP_VIA_TERMINFO=0 */' >> ${h}
2572 fi
2573
2574 if feat_yes SPAM_SPAMC; then
2575    echo '#define HAVE_SPAM_SPAMC' >> ${h}
2576    if command -v spamc >/dev/null 2>&1; then
2577       echo "#define SPAM_SPAMC_PATH \"`command -v spamc`\"" >> ${h}
2578    fi
2579 else
2580    echo '/* OPT_SPAM_SPAMC=0 */' >> ${h}
2581 fi
2582
2583 if feat_yes SPAM_SPAMD && [ -n "${have_af_unix}" ]; then
2584    echo '#define HAVE_SPAM_SPAMD' >> ${h}
2585 else
2586    feat_bail_required SPAM_SPAMD
2587    echo '/* OPT_SPAM_SPAMD=0 */' >> ${h}
2588 fi
2589
2590 feat_def SPAM_FILTER
2591
2592 if feat_yes SPAM_SPAMC || feat_yes SPAM_SPAMD || feat_yes SPAM_FILTER; then
2593    echo '#define HAVE_SPAM' >> ${h}
2594 else
2595    echo '/* HAVE_SPAM */' >> ${h}
2596 fi
2597
2598 if feat_yes QUOTE_FOLD &&\
2599       [ -n "${have_c90amend1}" ] && [ -n "${have_wcwidth}" ]; then
2600    echo '#define HAVE_QUOTE_FOLD' >> ${h}
2601 else
2602    feat_bail_required QUOTE_FOLD
2603    echo '/* OPT_QUOTE_FOLD=0 */' >> ${h}
2604 fi
2605
2606 feat_def FILTER_HTML_TAGSOUP
2607 feat_def COLOUR
2608 feat_def DOTLOCK
2609 feat_def MD5
2610 feat_def NOMEMDBG
2611
2612 ## Summarizing
2613
2614 ${rm} -f ${tmp}
2615 squeeze_em ${inc} ${tmp}
2616 ${mv} ${tmp} ${inc}
2617 squeeze_em ${lib} ${tmp}
2618 ${mv} ${tmp} ${lib}
2619
2620 # config.h
2621 ${mv} ${h} ${tmp}
2622 printf '#ifndef n_CONFIG_H\n# define n_CONFIG_H 1\n' > ${h}
2623 ${cat} ${tmp} >> ${h}
2624 ${rm} -f ${tmp}
2625 printf '\n' >> ${h}
2626
2627 # Create the real mk.mk
2628 # Note we cannout use explicit ./ filename prefix for source and object
2629 # pathnames because of a bug in bmake(1)
2630 ${rm} -rf ${tmp0}.* ${tmp0}*
2631 printf 'OBJ_SRC = ' >> ${mk}
2632 if feat_no AMALGAMATION; then
2633    for i in `printf '%s\n' *.c | ${sort}`; do
2634       if [ "${i}" = privsep.c ]; then
2635          continue
2636       fi
2637       printf "${i} " >> ${mk}
2638    done
2639    printf '\nAMALGAM_TARGET =\nAMALGAM_DEP =\n' >> ${mk}
2640 else
2641    printf 'main.c\nAMALGAM_TARGET = main.o\nAMALGAM_DEP = ' >> ${mk}
2642
2643    printf '\n/* HAVE_AMALGAMATION: include sources */\n' >> ${h}
2644    printf '#elif _CONFIG_H + 0 == 1\n' >> ${h}
2645    printf '# undef _CONFIG_H\n' >> ${h}
2646    printf '# define _CONFIG_H 2\n' >> ${h}
2647    for i in `printf '%s\n' *.c | ${sort}`; do
2648       if [ "${i}" = "${j}" ] || [ "${i}" = main.c ] || \
2649             [ "${i}" = privsep.c ]; then
2650          continue
2651       fi
2652       printf "${i} " >> ${mk}
2653       printf "# include \"${i}\"\n" >> ${h}
2654    done
2655    echo >> ${mk}
2656    # tcc(1) fails on 2015-11-13 unless this #else clause existed
2657    echo '#else' >> ${h}
2658 fi
2659
2660 # Finally, create the string that is used by *features* and `version'.
2661 # Take this nice opportunity and generate a visual listing of included and
2662 # non-included features for the person who runs the configuration
2663 msg '\nThe following features are included (+) or not (-):'
2664 set -- ${OPTIONS_DETECT} ${OPTIONS} ${OPTIONS_XTRA}
2665 printf '/* The "feature string" */\n' >> ${h}
2666 # Because + is expanded by *folder* if first in "echo $features", put something
2667 printf '#define VAL_FEATURES_CNT '${#}'\n#define VAL_FEATURES "#' >> ${h}
2668 sep=
2669 for opt
2670 do
2671    sdoc=`option_doc_of ${opt}`
2672    [ -z "${sdoc}" ] && continue
2673    sopt="`echo ${opt} | ${tr} '[A-Z]_' '[a-z]-'`"
2674    feat_yes ${opt} && sign=+ || sign=-
2675    printf -- "${sep}${sign}${sopt}" >> ${h}
2676    sep=','
2677    msg " %s %s: %s" ${sign} ${sopt} "${sdoc}"
2678 done
2679 # TODO instead of using sh+tr+awk+printf, use awk, drop option_doc_of, inc here
2680 #exec 5>&1 >>${h}
2681 #${awk} -v opts="${OPTIONS_DETECT} ${OPTIONS} ${OPTIONS_XTRA}" \
2682 #   -v xopts="${XOPTIONS_DETECT} ${XOPTIONS} ${XOPTIONS_XTRA}" \
2683 #
2684 printf '"\n#endif /* n_CONFIG_H */\n' >> ${h}
2685
2686 echo "LIBS = `${cat} ${lib}`" >> ${mk}
2687 echo "INCS = `${cat} ${inc}`" >> ${mk}
2688 echo >> ${mk}
2689 ${cat} ./mk-mk.in >> ${mk}
2690
2691 ## Finished!
2692
2693 msg '\nSetup:'
2694 msg ' . System-wide resource file: %s/%s' "${VAL_SYSCONFDIR}" "${VAL_SYSCONFRC}"
2695 msg ' . bindir: %s' "${VAL_BINDIR}"
2696 if feat_yes DOTLOCK; then
2697    msg ' . libexecdir: %s' "${VAL_LIBEXECDIR}"
2698 fi
2699 msg ' . mandir: %s' "${VAL_MANDIR}"
2700 msg ' . M(ail)T(ransfer)A(gent): %s (argv0 %s)' "${VAL_MTA}" "${VAL_MTA_ARGV0}"
2701 msg ' . $MAIL spool directory: %s' "${VAL_MAIL}"
2702 msg ''
2703
2704 if [ -n "${have_fnmatch}" ] && [ -n "${have_fchdir}" ]; then
2705    exit 0
2706 fi
2707 msg 'Remarks:'
2708 if [ -z "${have_fnmatch}" ]; then
2709    msg ' . The function fnmatch(3) could not be found.'
2710    msg '   Filename patterns like wildcard are not supported on your system'
2711 fi
2712 if [ -z "${have_fchdir}" ]; then
2713    msg ' . The function fchdir(2) could not be found.'
2714    msg '   We will use chdir(2) instead.'
2715    msg '   This is a problem only if the current working directory is changed'
2716    msg '   while this program is inside of it'
2717 fi
2718 msg ''
2719
2720 # s-it-mode