workbench/libs/z/configure

   1 #!/bin/sh
   2 # configure script for zlib.
   3 #
   4 # Normally configure builds both a static and a shared library.
   5 # If you want to build just a static library, use: ./configure --static
   6 #
   7 # To impose specific compiler or flags or install directory, use for example:
   8 #    prefix=$HOME CC=cc CFLAGS="-O4" ./configure
   9 # or for csh/tcsh users:
  10 #    (setenv prefix $HOME; setenv CC cc; setenv CFLAGS "-O4"; ./configure)
  11
  12 # Incorrect settings of CC or CFLAGS may prevent creating a shared library.
  13 # If you have problems, try without defining CC and CFLAGS before reporting
  14 # an error.
  15
  16 # start off configure.log
  17 echo -------------------- >> configure.log
  18 echo $0 $* >> configure.log
  19 date >> configure.log
  20
  21 # set command prefix for cross-compilation
  22 if [ -n "${CHOST}" ]; then
  23     uname="`echo "${CHOST}" | sed -e 's/^[^-]*-\([^-]*\)$/\1/' -e 's/^[^-]*-[^-]*-\([^-]*\)$/\1/' -e 's/^[^-]*-[^-]*-\([^-]*\)-.*$/\1/'`"
  24     CROSS_PREFIX="${CHOST}-"
  25 fi
  26
  27 # destination name for static library
  28 STATICLIB=libz.a
  29
  30 # extract zlib version numbers from zlib.h
  31 VER=`sed -n -e '/VERSION "/s/.*"\(.*\)".*/\1/p' < zlib.h`
  32 VER3=`sed -n -e '/VERSION "/s/.*"\([0-9]*\\.[0-9]*\\.[0-9]*\).*/\1/p' < zlib.h`
  33 VER2=`sed -n -e '/VERSION "/s/.*"\([0-9]*\\.[0-9]*\)\\..*/\1/p' < zlib.h`
  34 VER1=`sed -n -e '/VERSION "/s/.*"\([0-9]*\)\\..*/\1/p' < zlib.h`
  35
  36 # establish commands for library building
  37 if "${CROSS_PREFIX}ar" --version >/dev/null 2>/dev/null || test $? -lt 126; then
  38     AR=${AR-"${CROSS_PREFIX}ar"}
  39     test -n "${CROSS_PREFIX}" && echo Using ${AR} | tee -a configure.log
  40 else
  41     AR=${AR-"ar"}
  42     test -n "${CROSS_PREFIX}" && echo Using ${AR} | tee -a configure.log
  43 fi
  44 ARFLAGS=${ARFLAGS-"rc"}
  45 if "${CROSS_PREFIX}ranlib" --version >/dev/null 2>/dev/null || test $? -lt 126; then
  46     RANLIB=${RANLIB-"${CROSS_PREFIX}ranlib"}
  47     test -n "${CROSS_PREFIX}" && echo Using ${RANLIB} | tee -a configure.log
  48 else
  49     RANLIB=${RANLIB-"ranlib"}
  50 fi
  51 if "${CROSS_PREFIX}nm" --version >/dev/null 2>/dev/null || test $? -lt 126; then
  52     NM=${NM-"${CROSS_PREFIX}nm"}
  53     test -n "${CROSS_PREFIX}" && echo Using ${NM} | tee -a configure.log
  54 else
  55     NM=${NM-"nm"}
  56 fi
  57
  58 # set defaults before processing command line options
  59 LDCONFIG=${LDCONFIG-"ldconfig"}
  60 LDSHAREDLIBC="${LDSHAREDLIBC--lc}"
  61 ARCHS=
  62 prefix=${prefix-/usr/local}
  63 exec_prefix=${exec_prefix-'${prefix}'}
  64 libdir=${libdir-'${exec_prefix}/lib'}
  65 sharedlibdir=${sharedlibdir-'${libdir}'}
  66 includedir=${includedir-'${prefix}/include'}
  67 mandir=${mandir-'${prefix}/share/man'}
  68 shared_ext='.so'
  69 shared=1
  70 solo=0
  71 cover=0
  72 zprefix=0
  73 build64=0
  74 gcc=0
  75 old_cc="$CC"
  76 old_cflags="$CFLAGS"
  77 OBJC='$(OBJZ) $(OBJG)'
  78 PIC_OBJC='$(PIC_OBJZ) $(PIC_OBJG)'
  79
  80 # process command line options
  81 while test $# -ge 1
  82 do
  83 case "$1" in
  84     -h* | --help)
  85       echo 'usage:' | tee -a configure.log
  86       echo '  configure [--zprefix] [--prefix=PREFIX]  [--eprefix=EXPREFIX]' | tee -a configure.log
  87       echo '    [--static] [--64] [--libdir=LIBDIR] [--sharedlibdir=LIBDIR]' | tee -a configure.log
  88       echo '    [--includedir=INCLUDEDIR] [--archs="-arch i386 -arch x86_64"]' | tee -a configure.log
  89         exit 0 ;;
  90     -p*=* | --prefix=*) prefix=`echo $1 | sed 's/.*=//'`; shift ;;
  91     -e*=* | --eprefix=*) exec_prefix=`echo $1 | sed 's/.*=//'`; shift ;;
  92     -l*=* | --libdir=*) libdir=`echo $1 | sed 's/.*=//'`; shift ;;
  93     --sharedlibdir=*) sharedlibdir=`echo $1 | sed 's/.*=//'`; shift ;;
  94     -i*=* | --includedir=*) includedir=`echo $1 | sed 's/.*=//'`;shift ;;
  95     -u*=* | --uname=*) uname=`echo $1 | sed 's/.*=//'`;shift ;;
  96     -p* | --prefix) prefix="$2"; shift; shift ;;
  97     -e* | --eprefix) exec_prefix="$2"; shift; shift ;;
  98     -l* | --libdir) libdir="$2"; shift; shift ;;
  99     -i* | --includedir) includedir="$2"; shift; shift ;;
 100     -s* | --shared | --enable-shared) shared=1; shift ;;
 101     -t | --static) shared=0; shift ;;
 102     --solo) solo=1; shift ;;
 103     --cover) cover=1; shift ;;
 104     -z* | --zprefix) zprefix=1; shift ;;
 105     -6* | --64) build64=1; shift ;;
 106     -a*=* | --archs=*) ARCHS=`echo $1 | sed 's/.*=//'`; shift ;;
 107     --sysconfdir=*) echo "ignored option: --sysconfdir" | tee -a configure.log; shift ;;
 108     --localstatedir=*) echo "ignored option: --localstatedir" | tee -a configure.log; shift ;;
 109     *) echo "unknown option: $1"; echo "$0 --help for help" | tee -a configure.log; exit 1 ;;
 110     esac
 111 done
 112
 113 # define functions for testing compiler and library characteristics and logging the results
 114 test=ztest$$
 115
 116 show()
 117 {
 118   case "$*" in
 119     *$test.c*)
 120       echo === $test.c === >> configure.log
 121       cat $test.c >> configure.log
 122       echo === >> configure.log;;
 123   esac
 124   echo $* >> configure.log
 125 }
 126
 127 cat > $test.c <<EOF
 128 #error error
 129 EOF
 130 if ($CC -c $CFLAGS $test.c) 2>/dev/null; then
 131   try()
 132   {
 133     show $*
 134     test "`( $* ) 2>&1 | tee -a configure.log`" = ""
 135   }
 136   echo - using any output from compiler to indicate an error >> configure.log
 137 else
 138   try()
 139   {
 140     show $*
 141     ( $* ) >> configure.log 2>&1
 142     ret=$?
 143     if test $ret -ne 0; then
 144       echo "(exit code "$ret")" >> configure.log
 145     fi
 146     return $ret
 147   }
 148 fi
 149
 150 tryboth()
 151 {
 152   show $*
 153   got=`( $* ) 2>&1`
 154   ret=$?
 155   printf %s "$got" >> configure.log
 156   if test $ret -ne 0; then
 157     return $ret
 158   fi
 159   test "$got" = ""
 160 }
 161
 162 echo >> configure.log
 163
 164 # check for gcc vs. cc and set compile and link flags based on the system identified by uname
 165 cat > $test.c <<EOF
 166 extern int getchar();
 167 int hello() {return getchar();}
 168 EOF
 169
 170 test -z "$CC" && echo Checking for ${CROSS_PREFIX}gcc... | tee -a configure.log
 171 cc=${CC-${CROSS_PREFIX}gcc}
 172 cflags=${CFLAGS-"-O3"}
 173 # to force the asm version use: CFLAGS="-O3 -DASMV" ./configure
 174 case "$cc" in
 175   *gcc*) gcc=1 ;;
 176   *clang*) gcc=1 ;;
 177 esac
 178 case `$cc -v 2>&1` in
 179   *gcc*) gcc=1 ;;
 180 esac
 181
 182 show $cc -c $cflags $test.c
 183 if test "$gcc" -eq 1 && ($cc -c $cflags $test.c) >> configure.log 2>&1; then
 184   echo ... using gcc >> configure.log
 185   CC="$cc"
 186   CFLAGS="${CFLAGS--O3} ${ARCHS}"
 187   SFLAGS="${CFLAGS--O3} -fPIC"
 188   LDFLAGS="${LDFLAGS} ${ARCHS}"
 189   if test $build64 -eq 1; then
 190     CFLAGS="${CFLAGS} -m64"
 191     SFLAGS="${SFLAGS} -m64"
 192   fi
 193   if test "${ZLIBGCCWARN}" = "YES"; then
 194     CFLAGS="${CFLAGS} -Wall -Wextra -pedantic"
 195   fi
 196   if test -z "$uname"; then
 197     uname=`(uname -s || echo unknown) 2>/dev/null`
 198   fi
 199   case "$uname" in
 200   Linux* | linux* | GNU | GNU/* | solaris*)
 201         LDSHARED=${LDSHARED-"$cc -shared -Wl,-soname,libz.so.1,--version-script,zlib.map"} ;;
 202   *BSD | *bsd* | DragonFly)
 203         LDSHARED=${LDSHARED-"$cc -shared -Wl,-soname,libz.so.1,--version-script,zlib.map"}
 204         LDCONFIG="ldconfig -m" ;;
 205   CYGWIN* | Cygwin* | cygwin* | OS/2*)
 206         EXE='.exe' ;;
 207   MINGW* | mingw*)
 208 # temporary bypass
 209         rm -f $test.[co] $test $test$shared_ext
 210         echo "Please use win32/Makefile.gcc instead." | tee -a configure.log
 211         exit 1
 212         LDSHARED=${LDSHARED-"$cc -shared"}
 213         LDSHAREDLIBC=""
 214         EXE='.exe' ;;
 215   QNX*)  # This is for QNX6. I suppose that the QNX rule below is for QNX2,QNX4
 216          # (alain.bonnefoy@icbt.com)
 217                  LDSHARED=${LDSHARED-"$cc -shared -Wl,-hlibz.so.1"} ;;
 218   HP-UX*)
 219          LDSHARED=${LDSHARED-"$cc -shared $SFLAGS"}
 220          case `(uname -m || echo unknown) 2>/dev/null` in
 221          ia64)
 222                  shared_ext='.so'
 223                  SHAREDLIB='libz.so' ;;
 224          *)
 225                  shared_ext='.sl'
 226                  SHAREDLIB='libz.sl' ;;
 227          esac ;;
 228   Darwin* | darwin*)
 229              shared_ext='.dylib'
 230              SHAREDLIB=libz$shared_ext
 231              SHAREDLIBV=libz.$VER$shared_ext
 232              SHAREDLIBM=libz.$VER1$shared_ext
 233              LDSHARED=${LDSHARED-"$cc -dynamiclib -install_name $libdir/$SHAREDLIBM -compatibility_version $VER1 -current_version $VER3"}
 234              AR="/usr/bin/libtool"
 235              ARFLAGS="-o" ;;
 236   *)             LDSHARED=${LDSHARED-"$cc -shared"} ;;
 237   esac
 238 else
 239   # find system name and corresponding cc options
 240   CC=${CC-cc}
 241   gcc=0
 242   echo ... using $CC >> configure.log
 243   if test -z "$uname"; then
 244     uname=`(uname -sr || echo unknown) 2>/dev/null`
 245   fi
 246   case "$uname" in
 247   HP-UX*)    SFLAGS=${CFLAGS-"-O +z"}
 248              CFLAGS=${CFLAGS-"-O"}
 249 #            LDSHARED=${LDSHARED-"ld -b +vnocompatwarnings"}
 250              LDSHARED=${LDSHARED-"ld -b"}
 251          case `(uname -m || echo unknown) 2>/dev/null` in
 252          ia64)
 253              shared_ext='.so'
 254              SHAREDLIB='libz.so' ;;
 255          *)
 256              shared_ext='.sl'
 257              SHAREDLIB='libz.sl' ;;
 258          esac ;;
 259   IRIX*)     SFLAGS=${CFLAGS-"-ansi -O2 -rpath ."}
 260              CFLAGS=${CFLAGS-"-ansi -O2"}
 261              LDSHARED=${LDSHARED-"cc -shared -Wl,-soname,libz.so.1"} ;;
 262   OSF1\ V4*) SFLAGS=${CFLAGS-"-O -std1"}
 263              CFLAGS=${CFLAGS-"-O -std1"}
 264              LDFLAGS="${LDFLAGS} -Wl,-rpath,."
 265              LDSHARED=${LDSHARED-"cc -shared  -Wl,-soname,libz.so -Wl,-msym -Wl,-rpath,$(libdir) -Wl,-set_version,${VER}:1.0"} ;;
 266   OSF1*)     SFLAGS=${CFLAGS-"-O -std1"}
 267              CFLAGS=${CFLAGS-"-O -std1"}
 268              LDSHARED=${LDSHARED-"cc -shared -Wl,-soname,libz.so.1"} ;;
 269   QNX*)      SFLAGS=${CFLAGS-"-4 -O"}
 270              CFLAGS=${CFLAGS-"-4 -O"}
 271              LDSHARED=${LDSHARED-"cc"}
 272              RANLIB=${RANLIB-"true"}
 273              AR="cc"
 274              ARFLAGS="-A" ;;
 275   SCO_SV\ 3.2*) SFLAGS=${CFLAGS-"-O3 -dy -KPIC "}
 276              CFLAGS=${CFLAGS-"-O3"}
 277              LDSHARED=${LDSHARED-"cc -dy -KPIC -G"} ;;
 278   SunOS\ 5* | solaris*)
 279          LDSHARED=${LDSHARED-"cc -G -h libz$shared_ext.$VER1"}
 280          SFLAGS=${CFLAGS-"-fast -KPIC"}
 281          CFLAGS=${CFLAGS-"-fast"}
 282          if test $build64 -eq 1; then
 283              # old versions of SunPRO/Workshop/Studio don't support -m64,
 284              # but newer ones do.  Check for it.
 285              flag64=`$CC -flags | egrep -- '^-m64'`
 286              if test x"$flag64" != x"" ; then
 287                  CFLAGS="${CFLAGS} -m64"
 288                  SFLAGS="${SFLAGS} -m64"
 289              else
 290                  case `(uname -m || echo unknown) 2>/dev/null` in
 291                    i86*)
 292                      SFLAGS="$SFLAGS -xarch=amd64"
 293                      CFLAGS="$CFLAGS -xarch=amd64" ;;
 294                    *)
 295                      SFLAGS="$SFLAGS -xarch=v9"
 296                      CFLAGS="$CFLAGS -xarch=v9" ;;
 297                  esac
 298              fi
 299          fi
 300          ;;
 301   SunOS\ 4*) SFLAGS=${CFLAGS-"-O2 -PIC"}
 302              CFLAGS=${CFLAGS-"-O2"}
 303              LDSHARED=${LDSHARED-"ld"} ;;
 304   SunStudio\ 9*) SFLAGS=${CFLAGS-"-fast -xcode=pic32 -xtarget=ultra3 -xarch=v9b"}
 305              CFLAGS=${CFLAGS-"-fast -xtarget=ultra3 -xarch=v9b"}
 306              LDSHARED=${LDSHARED-"cc -xarch=v9b"} ;;
 307   UNIX_System_V\ 4.2.0)
 308              SFLAGS=${CFLAGS-"-KPIC -O"}
 309              CFLAGS=${CFLAGS-"-O"}
 310              LDSHARED=${LDSHARED-"cc -G"} ;;
 311   UNIX_SV\ 4.2MP)
 312              SFLAGS=${CFLAGS-"-Kconform_pic -O"}
 313              CFLAGS=${CFLAGS-"-O"}
 314              LDSHARED=${LDSHARED-"cc -G"} ;;
 315   OpenUNIX\ 5)
 316              SFLAGS=${CFLAGS-"-KPIC -O"}
 317              CFLAGS=${CFLAGS-"-O"}
 318              LDSHARED=${LDSHARED-"cc -G"} ;;
 319   AIX*)  # Courtesy of dbakker@arrayasolutions.com
 320              SFLAGS=${CFLAGS-"-O -qmaxmem=8192"}
 321              CFLAGS=${CFLAGS-"-O -qmaxmem=8192"}
 322              LDSHARED=${LDSHARED-"xlc -G"} ;;
 323   # send working options for other systems to zlib@gzip.org
 324   *)         SFLAGS=${CFLAGS-"-O"}
 325              CFLAGS=${CFLAGS-"-O"}
 326              LDSHARED=${LDSHARED-"cc -shared"} ;;
 327   esac
 328 fi
 329
 330 # destination names for shared library if not defined above
 331 SHAREDLIB=${SHAREDLIB-"libz$shared_ext"}
 332 SHAREDLIBV=${SHAREDLIBV-"libz$shared_ext.$VER"}
 333 SHAREDLIBM=${SHAREDLIBM-"libz$shared_ext.$VER1"}
 334
 335 echo >> configure.log
 336
 337 # see if shared library build supported
 338 if test $shared -eq 1; then
 339   echo Checking for shared library support... | tee -a configure.log
 340   # we must test in two steps (cc then ld), required at least on SunOS 4.x
 341   if try $CC -w -c $SFLAGS $test.c &&
 342      try $LDSHARED $SFLAGS -o $test$shared_ext $test.o; then
 343     echo Building shared library $SHAREDLIBV with $CC. | tee -a configure.log
 344   elif test -z "$old_cc" -a -z "$old_cflags"; then
 345     echo No shared library support. | tee -a configure.log
 346     shared=0;
 347   else
 348     echo 'No shared library support; try without defining CC and CFLAGS' | tee -a configure.log
 349     shared=0;
 350   fi
 351 fi
 352 if test $shared -eq 0; then
 353   LDSHARED="$CC"
 354   ALL="static"
 355   TEST="all teststatic"
 356   SHAREDLIB=""
 357   SHAREDLIBV=""
 358   SHAREDLIBM=""
 359   echo Building static library $STATICLIB version $VER with $CC. | tee -a configure.log
 360 else
 361   ALL="static shared"
 362   TEST="all teststatic testshared"
 363 fi
 364
 365 echo >> configure.log
 366
 367 # check for underscores in external names for use by assembler code
 368 CPP=${CPP-"$CC -E"}
 369 case $CFLAGS in
 370   *ASMV*)
 371     echo >> configure.log
 372     show "$NM $test.o | grep _hello"
 373     if test "`$NM $test.o | grep _hello | tee -a configure.log`" = ""; then
 374       CPP="$CPP -DNO_UNDERLINE"
 375       echo Checking for underline in external names... No. | tee -a configure.log
 376     else
 377       echo Checking for underline in external names... Yes. | tee -a configure.log
 378     fi ;;
 379 esac
 380
 381 echo >> configure.log
 382
 383 # check for large file support, and if none, check for fseeko()
 384 cat > $test.c <<EOF
 385 #include <sys/types.h>
 386 off64_t dummy = 0;
 387 EOF
 388 if try $CC -c $CFLAGS -D_LARGEFILE64_SOURCE=1 $test.c; then
 389   CFLAGS="${CFLAGS} -D_LARGEFILE64_SOURCE=1"
 390   SFLAGS="${SFLAGS} -D_LARGEFILE64_SOURCE=1"
 391   ALL="${ALL} all64"
 392   TEST="${TEST} test64"
 393   echo "Checking for off64_t... Yes." | tee -a configure.log
 394   echo "Checking for fseeko... Yes." | tee -a configure.log
 395 else
 396   echo "Checking for off64_t... No." | tee -a configure.log
 397   echo >> configure.log
 398   cat > $test.c <<EOF
 399 #include <stdio.h>
 400 int main(void) {
 401   fseeko(NULL, 0, 0);
 402   return 0;
 403 }
 404 EOF
 405   if try $CC $CFLAGS -o $test $test.c; then
 406     echo "Checking for fseeko... Yes." | tee -a configure.log
 407   else
 408     CFLAGS="${CFLAGS} -DNO_FSEEKO"
 409     SFLAGS="${SFLAGS} -DNO_FSEEKO"
 410     echo "Checking for fseeko... No." | tee -a configure.log
 411   fi
 412 fi
 413
 414 echo >> configure.log
 415
 416 # check for strerror() for use by gz* functions
 417 cat > $test.c <<EOF
 418 #include <string.h>
 419 #include <errno.h>
 420 int main() { return strlen(strerror(errno)); }
 421 EOF
 422 if try $CC $CFLAGS -o $test $test.c; then
 423   echo "Checking for strerror... Yes." | tee -a configure.log
 424 else
 425   CFLAGS="${CFLAGS} -DNO_STRERROR"
 426   SFLAGS="${SFLAGS} -DNO_STRERROR"
 427   echo "Checking for strerror... No." | tee -a configure.log
 428 fi
 429
 430 # copy clean zconf.h for subsequent edits
 431 cp -p zconf.h.in zconf.h
 432
 433 echo >> configure.log
 434
 435 # check for unistd.h and save result in zconf.h
 436 cat > $test.c <<EOF
 437 #include <unistd.h>
 438 int main() { return 0; }
 439 EOF
 440 if try $CC -c $CFLAGS $test.c; then
 441   sed < zconf.h "/^#ifdef HAVE_UNISTD_H.* may be/s/def HAVE_UNISTD_H\(.*\) may be/ 1\1 was/" > zconf.temp.h
 442   mv zconf.temp.h zconf.h
 443   echo "Checking for unistd.h... Yes." | tee -a configure.log
 444 else
 445   echo "Checking for unistd.h... No." | tee -a configure.log
 446 fi
 447
 448 echo >> configure.log
 449
 450 # check for stdarg.h and save result in zconf.h
 451 cat > $test.c <<EOF
 452 #include <stdarg.h>
 453 int main() { return 0; }
 454 EOF
 455 if try $CC -c $CFLAGS $test.c; then
 456   sed < zconf.h "/^#ifdef HAVE_STDARG_H.* may be/s/def HAVE_STDARG_H\(.*\) may be/ 1\1 was/" > zconf.temp.h
 457   mv zconf.temp.h zconf.h
 458   echo "Checking for stdarg.h... Yes." | tee -a configure.log
 459 else
 460   echo "Checking for stdarg.h... No." | tee -a configure.log
 461 fi
 462
 463 # if the z_ prefix was requested, save that in zconf.h
 464 if test $zprefix -eq 1; then
 465   sed < zconf.h "/#ifdef Z_PREFIX.* may be/s/def Z_PREFIX\(.*\) may be/ 1\1 was/" > zconf.temp.h
 466   mv zconf.temp.h zconf.h
 467   echo >> configure.log
 468   echo "Using z_ prefix on all symbols." | tee -a configure.log
 469 fi
 470
 471 # if --solo compilation was requested, save that in zconf.h and remove gz stuff from object lists
 472 if test $solo -eq 1; then
 473   sed '/#define ZCONF_H/a\
 474 #define Z_SOLO
 475
 476 ' < zconf.h > zconf.temp.h
 477   mv zconf.temp.h zconf.h
 478 OBJC='$(OBJZ)'
 479 PIC_OBJC='$(PIC_OBJZ)'
 480 fi
 481
 482 # if code coverage testing was requested, use older gcc if defined, e.g. "gcc-4.2" on Mac OS X
 483 if test $cover -eq 1; then
 484   CFLAGS="${CFLAGS} -fprofile-arcs -ftest-coverage"
 485   if test -n "$GCC_CLASSIC"; then
 486     CC=$GCC_CLASSIC
 487   fi
 488 fi
 489
 490 echo >> configure.log
 491
 492 # conduct a series of tests to resolve eight possible cases of using "vs" or "s" printf functions
 493 # (using stdarg or not), with or without "n" (proving size of buffer), and with or without a
 494 # return value.  The most secure result is vsnprintf() with a return value.  snprintf() with a
 495 # return value is secure as well, but then gzprintf() will be limited to 20 arguments.
 496 cat > $test.c <<EOF
 497 #include <stdio.h>
 498 #include <stdarg.h>
 499 #include "zconf.h"
 500 int main()
 501 {
 502 #ifndef STDC
 503   choke me
 504 #endif
 505   return 0;
 506 }
 507 EOF
 508 if try $CC -c $CFLAGS $test.c; then
 509   echo "Checking whether to use vs[n]printf() or s[n]printf()... using vs[n]printf()." | tee -a configure.log
 510
 511   echo >> configure.log
 512   cat > $test.c <<EOF
 513 #include <stdio.h>
 514 #include <stdarg.h>
 515 int mytest(const char *fmt, ...)
 516 {
 517   char buf[20];
 518   va_list ap;
 519   va_start(ap, fmt);
 520   vsnprintf(buf, sizeof(buf), fmt, ap);
 521   va_end(ap);
 522   return 0;
 523 }
 524 int main()
 525 {
 526   return (mytest("Hello%d\n", 1));
 527 }
 528 EOF
 529   if try $CC $CFLAGS -o $test $test.c; then
 530     echo "Checking for vsnprintf() in stdio.h... Yes." | tee -a configure.log
 531
 532     echo >> configure.log
 533     cat >$test.c <<EOF
 534 #include <stdio.h>
 535 #include <stdarg.h>
 536 int mytest(const char *fmt, ...)
 537 {
 538   int n;
 539   char buf[20];
 540   va_list ap;
 541   va_start(ap, fmt);
 542   n = vsnprintf(buf, sizeof(buf), fmt, ap);
 543   va_end(ap);
 544   return n;
 545 }
 546 int main()
 547 {
 548   return (mytest("Hello%d\n", 1));
 549 }
 550 EOF
 551
 552     if try $CC -c $CFLAGS $test.c; then
 553       echo "Checking for return value of vsnprintf()... Yes." | tee -a configure.log
 554     else
 555       CFLAGS="$CFLAGS -DHAS_vsnprintf_void"
 556       SFLAGS="$SFLAGS -DHAS_vsnprintf_void"
 557       echo "Checking for return value of vsnprintf()... No." | tee -a configure.log
 558       echo "  WARNING: apparently vsnprintf() does not return a value. zlib" | tee -a configure.log
 559       echo "  can build but will be open to possible string-format security" | tee -a configure.log
 560       echo "  vulnerabilities." | tee -a configure.log
 561     fi
 562   else
 563     CFLAGS="$CFLAGS -DNO_vsnprintf"
 564     SFLAGS="$SFLAGS -DNO_vsnprintf"
 565     echo "Checking for vsnprintf() in stdio.h... No." | tee -a configure.log
 566     echo "  WARNING: vsnprintf() not found, falling back to vsprintf(). zlib" | tee -a configure.log
 567     echo "  can build but will be open to possible buffer-overflow security" | tee -a configure.log
 568     echo "  vulnerabilities." | tee -a configure.log
 569
 570     echo >> configure.log
 571     cat >$test.c <<EOF
 572 #include <stdio.h>
 573 #include <stdarg.h>
 574 int mytest(const char *fmt, ...)
 575 {
 576   int n;
 577   char buf[20];
 578   va_list ap;
 579   va_start(ap, fmt);
 580   n = vsprintf(buf, fmt, ap);
 581   va_end(ap);
 582   return n;
 583 }
 584 int main()
 585 {
 586   return (mytest("Hello%d\n", 1));
 587 }
 588 EOF
 589
 590     if try $CC -c $CFLAGS $test.c; then
 591       echo "Checking for return value of vsprintf()... Yes." | tee -a configure.log
 592     else
 593       CFLAGS="$CFLAGS -DHAS_vsprintf_void"
 594       SFLAGS="$SFLAGS -DHAS_vsprintf_void"
 595       echo "Checking for return value of vsprintf()... No." | tee -a configure.log
 596       echo "  WARNING: apparently vsprintf() does not return a value. zlib" | tee -a configure.log
 597       echo "  can build but will be open to possible string-format security" | tee -a configure.log
 598       echo "  vulnerabilities." | tee -a configure.log
 599     fi
 600   fi
 601 else
 602   echo "Checking whether to use vs[n]printf() or s[n]printf()... using s[n]printf()." | tee -a configure.log
 603
 604   echo >> configure.log
 605   cat >$test.c <<EOF
 606 #include <stdio.h>
 607 int mytest()
 608 {
 609   char buf[20];
 610   snprintf(buf, sizeof(buf), "%s", "foo");
 611   return 0;
 612 }
 613 int main()
 614 {
 615   return (mytest());
 616 }
 617 EOF
 618
 619   if try $CC $CFLAGS -o $test $test.c; then
 620     echo "Checking for snprintf() in stdio.h... Yes." | tee -a configure.log
 621
 622     echo >> configure.log
 623     cat >$test.c <<EOF
 624 #include <stdio.h>
 625 int mytest()
 626 {
 627   char buf[20];
 628   return snprintf(buf, sizeof(buf), "%s", "foo");
 629 }
 630 int main()
 631 {
 632   return (mytest());
 633 }
 634 EOF
 635
 636     if try $CC -c $CFLAGS $test.c; then
 637       echo "Checking for return value of snprintf()... Yes." | tee -a configure.log
 638     else
 639       CFLAGS="$CFLAGS -DHAS_snprintf_void"
 640       SFLAGS="$SFLAGS -DHAS_snprintf_void"
 641       echo "Checking for return value of snprintf()... No." | tee -a configure.log
 642       echo "  WARNING: apparently snprintf() does not return a value. zlib" | tee -a configure.log
 643       echo "  can build but will be open to possible string-format security" | tee -a configure.log
 644       echo "  vulnerabilities." | tee -a configure.log
 645     fi
 646   else
 647     CFLAGS="$CFLAGS -DNO_snprintf"
 648     SFLAGS="$SFLAGS -DNO_snprintf"
 649     echo "Checking for snprintf() in stdio.h... No." | tee -a configure.log
 650     echo "  WARNING: snprintf() not found, falling back to sprintf(). zlib" | tee -a configure.log
 651     echo "  can build but will be open to possible buffer-overflow security" | tee -a configure.log
 652     echo "  vulnerabilities." | tee -a configure.log
 653
 654     echo >> configure.log
 655     cat >$test.c <<EOF
 656 #include <stdio.h>
 657 int mytest()
 658 {
 659   char buf[20];
 660   return sprintf(buf, "%s", "foo");
 661 }
 662 int main()
 663 {
 664   return (mytest());
 665 }
 666 EOF
 667
 668     if try $CC -c $CFLAGS $test.c; then
 669       echo "Checking for return value of sprintf()... Yes." | tee -a configure.log
 670     else
 671       CFLAGS="$CFLAGS -DHAS_sprintf_void"
 672       SFLAGS="$SFLAGS -DHAS_sprintf_void"
 673       echo "Checking for return value of sprintf()... No." | tee -a configure.log
 674       echo "  WARNING: apparently sprintf() does not return a value. zlib" | tee -a configure.log
 675       echo "  can build but will be open to possible string-format security" | tee -a configure.log
 676       echo "  vulnerabilities." | tee -a configure.log
 677     fi
 678   fi
 679 fi
 680
 681 # see if we can hide zlib internal symbols that are linked between separate source files
 682 if test "$gcc" -eq 1; then
 683   echo >> configure.log
 684   cat > $test.c <<EOF
 685 #define ZLIB_INTERNAL __attribute__((visibility ("hidden")))
 686 int ZLIB_INTERNAL foo;
 687 int main()
 688 {
 689   return 0;
 690 }
 691 EOF
 692   if tryboth $CC -c $CFLAGS $test.c; then
 693     CFLAGS="$CFLAGS -DHAVE_HIDDEN"
 694     SFLAGS="$SFLAGS -DHAVE_HIDDEN"
 695     echo "Checking for attribute(visibility) support... Yes." | tee -a configure.log
 696   else
 697     echo "Checking for attribute(visibility) support... No." | tee -a configure.log
 698   fi
 699 fi
 700
 701 echo >> configure.log
 702
 703 # find a four-byte unsiged integer type for crc calculations
 704 cat > $test.c <<EOF
 705 #include <stdio.h>
 706 #define is32(n,t) for(n=1,k=0;n;n<<=1,k++);if(k==32){puts(t);return 0;}
 707 int main() {
 708     int k;
 709     unsigned i;
 710     unsigned long l;
 711     unsigned short s;
 712     is32(i, "unsigned")
 713     is32(l, "unsigned long")
 714     is32(s, "unsigned short")
 715     return 1;
 716 }
 717 EOF
 718 Z_U4=""
 719 if try $CC $CFLAGS $test.c -o $test && Z_U4=`./$test` && test -n "$Z_U4"; then
 720   sed < zconf.h "/#define Z_U4/s/\/\* \.\/configure may/#define Z_U4 $Z_U4   \/* .\/configure put the/" > zconf.temp.h
 721   mv zconf.temp.h zconf.h
 722   echo "Looking for a four-byte integer type... Found." | tee -a configure.log
 723 else
 724   echo "Looking for a four-byte integer type... Not found." | tee -a configure.log
 725 fi
 726
 727 # clean up files produced by running the compiler and linker
 728 rm -f $test.[co] $test $test$shared_ext $test.gcno
 729
 730 # show the results in the log
 731 echo >> configure.log
 732 echo ALL = $ALL >> configure.log
 733 echo AR = $AR >> configure.log
 734 echo ARFLAGS = $ARFLAGS >> configure.log
 735 echo CC = $CC >> configure.log
 736 echo CFLAGS = $CFLAGS >> configure.log
 737 echo CPP = $CPP >> configure.log
 738 echo EXE = $EXE >> configure.log
 739 echo LDCONFIG = $LDCONFIG >> configure.log
 740 echo LDFLAGS = $LDFLAGS >> configure.log
 741 echo LDSHARED = $LDSHARED >> configure.log
 742 echo LDSHAREDLIBC = $LDSHAREDLIBC >> configure.log
 743 echo OBJC = $OBJC >> configure.log
 744 echo PIC_OBJC = $PIC_OBJC >> configure.log
 745 echo RANLIB = $RANLIB >> configure.log
 746 echo SFLAGS = $SFLAGS >> configure.log
 747 echo SHAREDLIB = $SHAREDLIB >> configure.log
 748 echo SHAREDLIBM = $SHAREDLIBM >> configure.log
 749 echo SHAREDLIBV = $SHAREDLIBV >> configure.log
 750 echo STATICLIB = $STATICLIB >> configure.log
 751 echo TEST = $TEST >> configure.log
 752 echo VER = $VER >> configure.log
 753 echo Z_U4 = $Z_U4 >> configure.log
 754 echo exec_prefix = $exec_prefix >> configure.log
 755 echo includedir = $includedir >> configure.log
 756 echo libdir = $libdir >> configure.log
 757 echo mandir = $mandir >> configure.log
 758 echo prefix = $prefix >> configure.log
 759 echo sharedlibdir = $sharedlibdir >> configure.log
 760 echo uname = $uname >> configure.log
 761 echo -------------------- >> configure.log
 762 echo >> configure.log
 763 echo >> configure.log
 764
 765 # udpate Makefile with the configure results
 766 sed < Makefile.in "
 767 /^CC *=/s#=.*#=$CC#
 768 /^CFLAGS *=/s#=.*#=$CFLAGS#
 769 /^SFLAGS *=/s#=.*#=$SFLAGS#
 770 /^LDFLAGS *=/s#=.*#=$LDFLAGS#
 771 /^LDSHARED *=/s#=.*#=$LDSHARED#
 772 /^CPP *=/s#=.*#=$CPP#
 773 /^STATICLIB *=/s#=.*#=$STATICLIB#
 774 /^SHAREDLIB *=/s#=.*#=$SHAREDLIB#
 775 /^SHAREDLIBV *=/s#=.*#=$SHAREDLIBV#
 776 /^SHAREDLIBM *=/s#=.*#=$SHAREDLIBM#
 777 /^AR *=/s#=.*#=$AR#
 778 /^ARFLAGS *=/s#=.*#=$ARFLAGS#
 779 /^RANLIB *=/s#=.*#=$RANLIB#
 780 /^LDCONFIG *=/s#=.*#=$LDCONFIG#
 781 /^LDSHAREDLIBC *=/s#=.*#=$LDSHAREDLIBC#
 782 /^EXE *=/s#=.*#=$EXE#
 783 /^prefix *=/s#=.*#=$prefix#
 784 /^exec_prefix *=/s#=.*#=$exec_prefix#
 785 /^libdir *=/s#=.*#=$libdir#
 786 /^sharedlibdir *=/s#=.*#=$sharedlibdir#
 787 /^includedir *=/s#=.*#=$includedir#
 788 /^mandir *=/s#=.*#=$mandir#
 789 /^OBJC *=/s#=.*#= $OBJC#
 790 /^PIC_OBJC *=/s#=.*#= $PIC_OBJC#
 791 /^all: */s#:.*#: $ALL#
 792 /^test: */s#:.*#: $TEST#
 793 " > Makefile
 794
 795 # create zlib.pc with the configure results
 796 sed < zlib.pc.in "
 797 /^CC *=/s#=.*#=$CC#
 798 /^CFLAGS *=/s#=.*#=$CFLAGS#
 799 /^CPP *=/s#=.*#=$CPP#
 800 /^LDSHARED *=/s#=.*#=$LDSHARED#
 801 /^STATICLIB *=/s#=.*#=$STATICLIB#
 802 /^SHAREDLIB *=/s#=.*#=$SHAREDLIB#
 803 /^SHAREDLIBV *=/s#=.*#=$SHAREDLIBV#
 804 /^SHAREDLIBM *=/s#=.*#=$SHAREDLIBM#
 805 /^AR *=/s#=.*#=$AR#
 806 /^ARFLAGS *=/s#=.*#=$ARFLAGS#
 807 /^RANLIB *=/s#=.*#=$RANLIB#
 808 /^EXE *=/s#=.*#=$EXE#
 809 /^prefix *=/s#=.*#=$prefix#
 810 /^exec_prefix *=/s#=.*#=$exec_prefix#
 811 /^libdir *=/s#=.*#=$libdir#
 812 /^sharedlibdir *=/s#=.*#=$sharedlibdir#
 813 /^includedir *=/s#=.*#=$includedir#
 814 /^mandir *=/s#=.*#=$mandir#
 815 /^LDFLAGS *=/s#=.*#=$LDFLAGS#
 816 " | sed -e "
 817 s/\@VERSION\@/$VER/g;
 818 " > zlib.pc