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      1 #!/bin/sh
      2 # configure script for zlib. This script is needed only if
      3 # you wish to build a shared library and your system supports them,
      4 # of if you need special compiler, flags or install directory.
      5 # Otherwise, you can just use directly "make test; make install"
      6 #
      7 # To create a shared library, use "configure --shared"; by default a static
      8 # library is created. If the primitive shared library support provided here
      9 # does not work, use ftp://prep.ai.mit.edu/pub/gnu/libtool-*.tar.gz
     10 #
     11 # To impose specific compiler or flags or install directory, use for example:
     12 #    prefix=$HOME CC=cc CFLAGS="-O4" ./configure
     13 # or for csh/tcsh users:
     14 #    (setenv prefix $HOME; setenv CC cc; setenv CFLAGS "-O4"; ./configure)
     15 # LDSHARED is the command to be used to create a shared library
     16 
     17 # Incorrect settings of CC or CFLAGS may prevent creating a shared library.
     18 # If you have problems, try without defining CC and CFLAGS before reporting
     19 # an error.
     20 
     21 LIBS=libz.a
     22 LDFLAGS="-L. ${LIBS}"
     23 VER=`sed -n -e '/VERSION "/s/.*"\(.*\)".*/\1/p' < zlib.h`
     24 VER2=`sed -n -e '/VERSION "/s/.*"\([0-9]*\\.[0-9]*\)\\..*/\1/p' < zlib.h`
     25 VER1=`sed -n -e '/VERSION "/s/.*"\([0-9]*\)\\..*/\1/p' < zlib.h`
     26 AR=${AR-"ar rc"}
     27 RANLIB=${RANLIB-"ranlib"}
     28 prefix=${prefix-/usr/local}
     29 exec_prefix=${exec_prefix-'${prefix}'}
     30 libdir=${libdir-'${exec_prefix}/lib'}
     31 includedir=${includedir-'${prefix}/include'}
     32 mandir=${mandir-'${prefix}/share/man'}
     33 shared_ext='.so'
     34 shared=0
     35 gcc=0
     36 old_cc="$CC"
     37 old_cflags="$CFLAGS"
     38 
     39 while test $# -ge 1
     40 do
     41 case "$1" in
     42     -h* | --h*)
     43       echo 'usage:'
     44       echo '  configure [--shared] [--prefix=PREFIX]  [--exec_prefix=EXPREFIX]'
     45       echo '     [--libdir=LIBDIR] [--includedir=INCLUDEDIR]'
     46         exit 0;;
     47     -p*=* | --p*=*) prefix=`echo $1 | sed 's/[-a-z_]*=//'`; shift;;
     48     -e*=* | --e*=*) exec_prefix=`echo $1 | sed 's/[-a-z_]*=//'`; shift;;
     49     -l*=* | --libdir=*) libdir=`echo $1 | sed 's/[-a-z_]*=//'`; shift;;
     50     -i*=* | --includedir=*) includedir=`echo $1 | sed 's/[-a-z_]*=//'`;shift;;
     51     -p* | --p*) prefix="$2"; shift; shift;;
     52     -e* | --e*) exec_prefix="$2"; shift; shift;;
     53     -l* | --l*) libdir="$2"; shift; shift;;
     54     -i* | --i*) includedir="$2"; shift; shift;;
     55     -s* | --s*) shared=1; shift;;
     56     *) echo "unknown option: $1"; echo "$0 --help for help"; exit 1;;
     57     esac
     58 done
     59 
     60 test=ztest$$
     61 cat > $test.c <<EOF
     62 extern int getchar();
     63 int hello() {return getchar();}
     64 EOF
     65 
     66 test -z "$CC" && echo Checking for gcc...
     67 cc=${CC-gcc}
     68 cflags=${CFLAGS-"-O3"}
     69 # to force the asm version use: CFLAGS="-O3 -DASMV" ./configure
     70 case "$cc" in
     71   *gcc*) gcc=1;;
     72 esac
     73 
     74 if test "$gcc" -eq 1 && ($cc -c $cflags $test.c) 2>/dev/null; then
     75   CC="$cc"
     76   SFLAGS=${CFLAGS-"-fPIC -O3"}
     77   CFLAGS="$cflags"
     78   case `(uname -s || echo unknown) 2>/dev/null` in
     79   Linux | linux | GNU | GNU/*) LDSHARED=${LDSHARED-"$cc -shared -Wl,-soname,libz.so.1"};;
     80   CYGWIN* | Cygwin* | cygwin* | OS/2* )
     81              EXE='.exe';;
     82   QNX*)  # This is for QNX6. I suppose that the QNX rule below is for QNX2,QNX4
     83          # (alain.bonnefoy (at] icbt.com)
     84                  LDSHARED=${LDSHARED-"$cc -shared -Wl,-hlibz.so.1"};;
     85   HP-UX*)
     86          LDSHARED=${LDSHARED-"$cc -shared $SFLAGS"}
     87          case `(uname -m || echo unknown) 2>/dev/null` in
     88          ia64)
     89                  shared_ext='.so'
     90                  SHAREDLIB='libz.so';;
     91          *)
     92                  shared_ext='.sl'
     93                  SHAREDLIB='libz.sl';;
     94          esac;;
     95   Darwin*)   shared_ext='.dylib'
     96              SHAREDLIB=libz$shared_ext
     97              SHAREDLIBV=libz.$VER$shared_ext
     98              SHAREDLIBM=libz.$VER1$shared_ext
     99              LDSHARED=${LDSHARED-"$cc -dynamiclib -install_name $libdir/$SHAREDLIBM -compatibility_version $VER1 -current_version $VER"};;
    100   *)             LDSHARED=${LDSHARED-"$cc -shared"};;
    101   esac
    102 else
    103   # find system name and corresponding cc options
    104   CC=${CC-cc}
    105   case `(uname -sr || echo unknown) 2>/dev/null` in
    106   HP-UX*)    SFLAGS=${CFLAGS-"-O +z"}
    107              CFLAGS=${CFLAGS-"-O"}
    108 #            LDSHARED=${LDSHARED-"ld -b +vnocompatwarnings"}
    109              LDSHARED=${LDSHARED-"ld -b"}
    110          case `(uname -m || echo unknown) 2>/dev/null` in
    111          ia64)
    112              shared_ext='.so'
    113              SHAREDLIB='libz.so';;
    114          *)
    115              shared_ext='.sl'
    116              SHAREDLIB='libz.sl';;
    117          esac;;
    118   IRIX*)     SFLAGS=${CFLAGS-"-ansi -O2 -rpath ."}
    119              CFLAGS=${CFLAGS-"-ansi -O2"}
    120              LDSHARED=${LDSHARED-"cc -shared"};;
    121   OSF1\ V4*) SFLAGS=${CFLAGS-"-O -std1"}
    122              CFLAGS=${CFLAGS-"-O -std1"}
    123              LDSHARED=${LDSHARED-"cc -shared  -Wl,-soname,libz.so -Wl,-msym -Wl,-rpath,$(libdir) -Wl,-set_version,${VER}:1.0"};;
    124   OSF1*)     SFLAGS=${CFLAGS-"-O -std1"}
    125              CFLAGS=${CFLAGS-"-O -std1"}
    126              LDSHARED=${LDSHARED-"cc -shared"};;
    127   QNX*)      SFLAGS=${CFLAGS-"-4 -O"}
    128              CFLAGS=${CFLAGS-"-4 -O"}
    129              LDSHARED=${LDSHARED-"cc"}
    130              RANLIB=${RANLIB-"true"}
    131              AR="cc -A";;
    132   SCO_SV\ 3.2*) SFLAGS=${CFLAGS-"-O3 -dy -KPIC "}
    133              CFLAGS=${CFLAGS-"-O3"}
    134              LDSHARED=${LDSHARED-"cc -dy -KPIC -G"};;
    135   SunOS\ 5*) SFLAGS=${CFLAGS-"-fast -xcg89 -KPIC -R."}
    136              CFLAGS=${CFLAGS-"-fast -xcg89"}
    137              LDSHARED=${LDSHARED-"cc -G"};;
    138   SunOS\ 4*) SFLAGS=${CFLAGS-"-O2 -PIC"}
    139              CFLAGS=${CFLAGS-"-O2"}
    140              LDSHARED=${LDSHARED-"ld"};;
    141   SunStudio\ 9*) SFLAGS=${CFLAGS-"-DUSE_MMAP -fast -xcode=pic32 -xtarget=ultra3 -xarch=v9b"}
    142              CFLAGS=${CFLAGS-"-DUSE_MMAP -fast -xtarget=ultra3 -xarch=v9b"}
    143              LDSHARED=${LDSHARED-"cc -xarch=v9b"};;
    144   UNIX_System_V\ 4.2.0)
    145              SFLAGS=${CFLAGS-"-KPIC -O"}
    146              CFLAGS=${CFLAGS-"-O"}
    147              LDSHARED=${LDSHARED-"cc -G"};;
    148   UNIX_SV\ 4.2MP)
    149              SFLAGS=${CFLAGS-"-Kconform_pic -O"}
    150              CFLAGS=${CFLAGS-"-O"}
    151              LDSHARED=${LDSHARED-"cc -G"};;
    152   OpenUNIX\ 5)
    153              SFLAGS=${CFLAGS-"-KPIC -O"}
    154              CFLAGS=${CFLAGS-"-O"}
    155              LDSHARED=${LDSHARED-"cc -G"};;
    156   AIX*)  # Courtesy of dbakker (at] arrayasolutions.com
    157              SFLAGS=${CFLAGS-"-O -qmaxmem=8192"}
    158              CFLAGS=${CFLAGS-"-O -qmaxmem=8192"}
    159              LDSHARED=${LDSHARED-"xlc -G"};;
    160   # send working options for other systems to support (at] gzip.org
    161   *)         SFLAGS=${CFLAGS-"-O"}
    162              CFLAGS=${CFLAGS-"-O"}
    163              LDSHARED=${LDSHARED-"cc -shared"};;
    164   esac
    165 fi
    166 
    167 SHAREDLIB=${SHAREDLIB-"libz$shared_ext"}
    168 SHAREDLIBV=${SHAREDLIBV-"libz$shared_ext.$VER"}
    169 SHAREDLIBM=${SHAREDLIBM-"libz$shared_ext.$VER1"}
    170 
    171 if test $shared -eq 1; then
    172   echo Checking for shared library support...
    173   # we must test in two steps (cc then ld), required at least on SunOS 4.x
    174   if test "`($CC -c $SFLAGS $test.c) 2>&1`" = "" &&
    175      test "`($LDSHARED -o $test$shared_ext $test.o) 2>&1`" = ""; then
    176     CFLAGS="$SFLAGS"
    177     LIBS="$SHAREDLIBV"
    178     echo Building shared library $SHAREDLIBV with $CC.
    179   elif test -z "$old_cc" -a -z "$old_cflags"; then
    180     echo No shared library support.
    181     shared=0;
    182   else
    183     echo 'No shared library support; try without defining CC and CFLAGS'
    184     shared=0;
    185   fi
    186 fi
    187 if test $shared -eq 0; then
    188   LDSHARED="$CC"
    189   echo Building static library $LIBS version $VER with $CC.
    190 else
    191   LDFLAGS="-L. ${SHAREDLIBV}"
    192 fi
    193 
    194 cat > $test.c <<EOF
    195 #include <unistd.h>
    196 int main() { return 0; }
    197 EOF
    198 if test "`($CC -c $CFLAGS $test.c) 2>&1`" = ""; then
    199   sed < zconf.in.h "/HAVE_UNISTD_H/s%0%1%" > zconf.h
    200   echo "Checking for unistd.h... Yes."
    201 else
    202   cp -p zconf.in.h zconf.h
    203   echo "Checking for unistd.h... No."
    204 fi
    205 
    206 cat > $test.c <<EOF
    207 #include <stdio.h>
    208 #include <stdarg.h>
    209 #include "zconf.h"
    210 
    211 int main()
    212 {
    213 #ifndef STDC
    214   choke me
    215 #endif
    216 
    217   return 0;
    218 }
    219 EOF
    220 
    221 if test "`($CC -c $CFLAGS $test.c) 2>&1`" = ""; then
    222   echo "Checking whether to use vs[n]printf() or s[n]printf()... using vs[n]printf()"
    223 
    224   cat > $test.c <<EOF
    225 #include <stdio.h>
    226 #include <stdarg.h>
    227 
    228 int mytest(char *fmt, ...)
    229 {
    230   char buf[20];
    231   va_list ap;
    232 
    233   va_start(ap, fmt);
    234   vsnprintf(buf, sizeof(buf), fmt, ap);
    235   va_end(ap);
    236   return 0;
    237 }
    238 
    239 int main()
    240 {
    241   return (mytest("Hello%d\n", 1));
    242 }
    243 EOF
    244 
    245   if test "`($CC $CFLAGS -o $test $test.c) 2>&1`" = ""; then
    246     echo "Checking for vsnprintf() in stdio.h... Yes."
    247 
    248     cat >$test.c <<EOF
    249 #include <stdio.h>
    250 #include <stdarg.h>
    251 
    252 int mytest(char *fmt, ...)
    253 {
    254   int n;
    255   char buf[20];
    256   va_list ap;
    257 
    258   va_start(ap, fmt);
    259   n = vsnprintf(buf, sizeof(buf), fmt, ap);
    260   va_end(ap);
    261   return n;
    262 }
    263 
    264 int main()
    265 {
    266   return (mytest("Hello%d\n", 1));
    267 }
    268 EOF
    269 
    270     if test "`($CC -c $CFLAGS $test.c) 2>&1`" = ""; then
    271       echo "Checking for return value of vsnprintf()... Yes."
    272     else
    273       CFLAGS="$CFLAGS -DHAS_vsnprintf_void"
    274       echo "Checking for return value of vsnprintf()... No."
    275       echo "  WARNING: apparently vsnprintf() does not return a value. zlib"
    276       echo "  can build but will be open to possible string-format security"
    277       echo "  vulnerabilities."
    278     fi
    279   else
    280     CFLAGS="$CFLAGS -DNO_vsnprintf"
    281     echo "Checking for vsnprintf() in stdio.h... No."
    282     echo "  WARNING: vsnprintf() not found, falling back to vsprintf(). zlib"
    283     echo "  can build but will be open to possible buffer-overflow security"
    284     echo "  vulnerabilities."
    285 
    286     cat >$test.c <<EOF
    287 #include <stdio.h>
    288 #include <stdarg.h>
    289 
    290 int mytest(char *fmt, ...)
    291 {
    292   int n;
    293   char buf[20];
    294   va_list ap;
    295 
    296   va_start(ap, fmt);
    297   n = vsprintf(buf, fmt, ap);
    298   va_end(ap);
    299   return n;
    300 }
    301 
    302 int main()
    303 {
    304   return (mytest("Hello%d\n", 1));
    305 }
    306 EOF
    307 
    308     if test "`($CC -c $CFLAGS $test.c) 2>&1`" = ""; then
    309       echo "Checking for return value of vsprintf()... Yes."
    310     else
    311       CFLAGS="$CFLAGS -DHAS_vsprintf_void"
    312       echo "Checking for return value of vsprintf()... No."
    313       echo "  WARNING: apparently vsprintf() does not return a value. zlib"
    314       echo "  can build but will be open to possible string-format security"
    315       echo "  vulnerabilities."
    316     fi
    317   fi
    318 else
    319   echo "Checking whether to use vs[n]printf() or s[n]printf()... using s[n]printf()"
    320 
    321   cat >$test.c <<EOF
    322 #include <stdio.h>
    323 
    324 int mytest()
    325 {
    326   char buf[20];
    327 
    328   snprintf(buf, sizeof(buf), "%s", "foo");
    329   return 0;
    330 }
    331 
    332 int main()
    333 {
    334   return (mytest());
    335 }
    336 EOF
    337 
    338   if test "`($CC $CFLAGS -o $test $test.c) 2>&1`" = ""; then
    339     echo "Checking for snprintf() in stdio.h... Yes."
    340 
    341     cat >$test.c <<EOF
    342 #include <stdio.h>
    343 
    344 int mytest()
    345 {
    346   char buf[20];
    347 
    348   return snprintf(buf, sizeof(buf), "%s", "foo");
    349 }
    350 
    351 int main()
    352 {
    353   return (mytest());
    354 }
    355 EOF
    356 
    357     if test "`($CC -c $CFLAGS $test.c) 2>&1`" = ""; then
    358       echo "Checking for return value of snprintf()... Yes."
    359     else
    360       CFLAGS="$CFLAGS -DHAS_snprintf_void"
    361       echo "Checking for return value of snprintf()... No."
    362       echo "  WARNING: apparently snprintf() does not return a value. zlib"
    363       echo "  can build but will be open to possible string-format security"
    364       echo "  vulnerabilities."
    365     fi
    366   else
    367     CFLAGS="$CFLAGS -DNO_snprintf"
    368     echo "Checking for snprintf() in stdio.h... No."
    369     echo "  WARNING: snprintf() not found, falling back to sprintf(). zlib"
    370     echo "  can build but will be open to possible buffer-overflow security"
    371     echo "  vulnerabilities."
    372 
    373     cat >$test.c <<EOF
    374 #include <stdio.h>
    375 
    376 int mytest()
    377 {
    378   char buf[20];
    379 
    380   return sprintf(buf, "%s", "foo");
    381 }
    382 
    383 int main()
    384 {
    385   return (mytest());
    386 }
    387 EOF
    388 
    389     if test "`($CC -c $CFLAGS $test.c) 2>&1`" = ""; then
    390       echo "Checking for return value of sprintf()... Yes."
    391     else
    392       CFLAGS="$CFLAGS -DHAS_sprintf_void"
    393       echo "Checking for return value of sprintf()... No."
    394       echo "  WARNING: apparently sprintf() does not return a value. zlib"
    395       echo "  can build but will be open to possible string-format security"
    396       echo "  vulnerabilities."
    397     fi
    398   fi
    399 fi
    400 
    401 cat >$test.c <<EOF
    402 #include <errno.h>
    403 int main() { return 0; }
    404 EOF
    405 if test "`($CC -c $CFLAGS $test.c) 2>&1`" = ""; then
    406   echo "Checking for errno.h... Yes."
    407 else
    408   echo "Checking for errno.h... No."
    409   CFLAGS="$CFLAGS -DNO_ERRNO_H"
    410 fi
    411 
    412 cat > $test.c <<EOF
    413 #include <sys/types.h>
    414 #include <sys/mman.h>
    415 #include <sys/stat.h>
    416 caddr_t hello() {
    417   return mmap((caddr_t)0, (off_t)0, PROT_READ, MAP_SHARED, 0, (off_t)0);
    418 }
    419 EOF
    420 if test "`($CC -c $CFLAGS $test.c) 2>&1`" = ""; then
    421   CFLAGS="$CFLAGS -DUSE_MMAP"
    422   echo Checking for mmap support... Yes.
    423 else
    424   echo Checking for mmap support... No.
    425 fi
    426 
    427 CPP=${CPP-"$CC -E"}
    428 case $CFLAGS in
    429   *ASMV*)
    430     if test "`nm $test.o | grep _hello`" = ""; then
    431       CPP="$CPP -DNO_UNDERLINE"
    432       echo Checking for underline in external names... No.
    433     else
    434       echo Checking for underline in external names... Yes.
    435     fi;;
    436 esac
    437 
    438 rm -f $test.[co] $test $test$shared_ext
    439 
    440 # udpate Makefile
    441 sed < Makefile.in "
    442 /^CC *=/s#=.*#=$CC#
    443 /^CFLAGS *=/s#=.*#=$CFLAGS#
    444 /^CPP *=/s#=.*#=$CPP#
    445 /^LDSHARED *=/s#=.*#=$LDSHARED#
    446 /^LIBS *=/s#=.*#=$LIBS#
    447 /^SHAREDLIB *=/s#=.*#=$SHAREDLIB#
    448 /^SHAREDLIBV *=/s#=.*#=$SHAREDLIBV#
    449 /^SHAREDLIBM *=/s#=.*#=$SHAREDLIBM#
    450 /^AR *=/s#=.*#=$AR#
    451 /^RANLIB *=/s#=.*#=$RANLIB#
    452 /^EXE *=/s#=.*#=$EXE#
    453 /^prefix *=/s#=.*#=$prefix#
    454 /^exec_prefix *=/s#=.*#=$exec_prefix#
    455 /^libdir *=/s#=.*#=$libdir#
    456 /^includedir *=/s#=.*#=$includedir#
    457 /^mandir *=/s#=.*#=$mandir#
    458 /^LDFLAGS *=/s#=.*#=$LDFLAGS#
    459 " > Makefile
    460