#!/bin/sh+
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# configure script for zlib. This script is needed only if+
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# you wish to build a shared library and your system supports them,+
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# of if you need special compiler, flags or install directory.+
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# Otherwise, you can just use directly "make test; make install"+
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#+
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# To create a shared library, use "configure --shared"; by default a static+
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# library is created. If the primitive shared library support provided here+
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# does not work, use ftp://prep.ai.mit.edu/pub/gnu/libtool-*.tar.gz+
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#+
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# To impose specific compiler or flags or install directory, use for example:+
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#    prefix=$HOME CC=cc CFLAGS="-O4" ./configure+
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# or for csh/tcsh users:+
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#    (setenv prefix $HOME; setenv CC cc; setenv CFLAGS "-O4"; ./configure)+
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# LDSHARED is the command to be used to create a shared library+
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+
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# Incorrect settings of CC or CFLAGS may prevent creating a shared library.+
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# If you have problems, try without defining CC and CFLAGS before reporting+
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# an error.+
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+
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LIBS=libz.a+
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LDFLAGS="-L. ${LIBS}"+
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VER=`sed -n -e '/VERSION "/s/.*"\(.*\)".*/\1/p' < zlib.h`+
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VER2=`sed -n -e '/VERSION "/s/.*"\([0-9]*\\.[0-9]*\)\\..*/\1/p' < zlib.h`+
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VER1=`sed -n -e '/VERSION "/s/.*"\([0-9]*\)\\..*/\1/p' < zlib.h`+
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AR=${AR-"ar rc"}+
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RANLIB=${RANLIB-"ranlib"}+
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prefix=${prefix-/usr/local}+
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exec_prefix=${exec_prefix-'${prefix}'}+
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libdir=${libdir-'${exec_prefix}/lib'}+
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includedir=${includedir-'${prefix}/include'}+
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mandir=${mandir-'${prefix}/share/man'}+
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shared_ext='.so'+
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shared=0+
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gcc=0+
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old_cc="$CC"+
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old_cflags="$CFLAGS"+
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+
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while test $# -ge 1+
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do+
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case "$1" in+
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    -h* | --h*)+
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      echo 'usage:'+
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      echo '  configure [--shared] [--prefix=PREFIX]  [--exec_prefix=EXPREFIX]'+
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      echo '     [--libdir=LIBDIR] [--includedir=INCLUDEDIR]'+
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        exit 0;;+
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    -p*=* | --p*=*) prefix=`echo $1 | sed 's/[-a-z_]*=//'`; shift;;+
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    -e*=* | --e*=*) exec_prefix=`echo $1 | sed 's/[-a-z_]*=//'`; shift;;+
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    -l*=* | --libdir=*) libdir=`echo $1 | sed 's/[-a-z_]*=//'`; shift;;+
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    -i*=* | --includedir=*) includedir=`echo $1 | sed 's/[-a-z_]*=//'`;shift;;+
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    -p* | --p*) prefix="$2"; shift; shift;;+
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    -e* | --e*) exec_prefix="$2"; shift; shift;;+
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    -l* | --l*) libdir="$2"; shift; shift;;+
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    -i* | --i*) includedir="$2"; shift; shift;;+
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    -s* | --s*) shared=1; shift;;+
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    *) echo "unknown option: $1"; echo "$0 --help for help"; exit 1;;+
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    esac+
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done+
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+
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test=ztest$$+
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cat > $test.c <<EOF+
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extern int getchar();+
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int hello() {return getchar();}+
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EOF+
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+
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test -z "$CC" && echo Checking for gcc...+
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cc=${CC-gcc}+
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cflags=${CFLAGS-"-O3"}+
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# to force the asm version use: CFLAGS="-O3 -DASMV" ./configure+
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case "$cc" in+
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  *gcc*) gcc=1;;+
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esac+
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+
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if test "$gcc" -eq 1 && ($cc -c $cflags $test.c) 2>/dev/null; then+
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  CC="$cc"+
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  SFLAGS=${CFLAGS-"-fPIC -O3"}+
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  CFLAGS="$cflags"+
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  case `(uname -s || echo unknown) 2>/dev/null` in+
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  Linux | linux | GNU | GNU/*) LDSHARED=${LDSHARED-"$cc -shared -Wl,-soname,libz.so.1"};;+
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  CYGWIN* | Cygwin* | cygwin* | OS/2* )+
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             EXE='.exe';;+
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  QNX*)  # This is for QNX6. I suppose that the QNX rule below is for QNX2,QNX4+
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         # (alain.bonnefoy@icbt.com)+
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                 LDSHARED=${LDSHARED-"$cc -shared -Wl,-hlibz.so.1"};;+
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  HP-UX*)+
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         LDSHARED=${LDSHARED-"$cc -shared $SFLAGS"}+
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         case `(uname -m || echo unknown) 2>/dev/null` in+
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         ia64)+
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                 shared_ext='.so'+
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                 SHAREDLIB='libz.so';;+
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         *)+
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                 shared_ext='.sl'+
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                 SHAREDLIB='libz.sl';;+
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         esac;;+
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  Darwin*)   shared_ext='.dylib'+
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             SHAREDLIB=libz$shared_ext+
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             SHAREDLIBV=libz.$VER$shared_ext+
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             SHAREDLIBM=libz.$VER1$shared_ext+
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             LDSHARED=${LDSHARED-"$cc -dynamiclib -install_name $libdir/$SHAREDLIBM -compatibility_version $VER1 -current_version $VER"};;+
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  *)             LDSHARED=${LDSHARED-"$cc -shared"};;+
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  esac+
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else+
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  # find system name and corresponding cc options+
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  CC=${CC-cc}+
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  case `(uname -sr || echo unknown) 2>/dev/null` in+
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  HP-UX*)    SFLAGS=${CFLAGS-"-O +z"}+
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             CFLAGS=${CFLAGS-"-O"}+
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#            LDSHARED=${LDSHARED-"ld -b +vnocompatwarnings"}+
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             LDSHARED=${LDSHARED-"ld -b"}+
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         case `(uname -m || echo unknown) 2>/dev/null` in+
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         ia64)+
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             shared_ext='.so'+
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             SHAREDLIB='libz.so';;+
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         *)+
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             shared_ext='.sl'+
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             SHAREDLIB='libz.sl';;+
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         esac;;+
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  IRIX*)     SFLAGS=${CFLAGS-"-ansi -O2 -rpath ."}+
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             CFLAGS=${CFLAGS-"-ansi -O2"}+
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             LDSHARED=${LDSHARED-"cc -shared"};;+
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  OSF1\ V4*) SFLAGS=${CFLAGS-"-O -std1"}+
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             CFLAGS=${CFLAGS-"-O -std1"}+
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             LDSHARED=${LDSHARED-"cc -shared  -Wl,-soname,libz.so -Wl,-msym -Wl,-rpath,$(libdir) -Wl,-set_version,${VER}:1.0"};;+
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  OSF1*)     SFLAGS=${CFLAGS-"-O -std1"}+
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             CFLAGS=${CFLAGS-"-O -std1"}+
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             LDSHARED=${LDSHARED-"cc -shared"};;+
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  QNX*)      SFLAGS=${CFLAGS-"-4 -O"}+
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             CFLAGS=${CFLAGS-"-4 -O"}+
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             LDSHARED=${LDSHARED-"cc"}+
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             RANLIB=${RANLIB-"true"}+
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             AR="cc -A";;+
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  SCO_SV\ 3.2*) SFLAGS=${CFLAGS-"-O3 -dy -KPIC "}+
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             CFLAGS=${CFLAGS-"-O3"}+
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             LDSHARED=${LDSHARED-"cc -dy -KPIC -G"};;+
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  SunOS\ 5*) SFLAGS=${CFLAGS-"-fast -xcg89 -KPIC -R."}+
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             CFLAGS=${CFLAGS-"-fast -xcg89"}+
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             LDSHARED=${LDSHARED-"cc -G"};;+
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  SunOS\ 4*) SFLAGS=${CFLAGS-"-O2 -PIC"}+
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             CFLAGS=${CFLAGS-"-O2"}+
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             LDSHARED=${LDSHARED-"ld"};;+
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  SunStudio\ 9*) SFLAGS=${CFLAGS-"-DUSE_MMAP -fast -xcode=pic32 -xtarget=ultra3 -xarch=v9b"}+
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             CFLAGS=${CFLAGS-"-DUSE_MMAP -fast -xtarget=ultra3 -xarch=v9b"}+
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             LDSHARED=${LDSHARED-"cc -xarch=v9b"};;+
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  UNIX_System_V\ 4.2.0)+
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             SFLAGS=${CFLAGS-"-KPIC -O"}+
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             CFLAGS=${CFLAGS-"-O"}+
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             LDSHARED=${LDSHARED-"cc -G"};;+
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  UNIX_SV\ 4.2MP)+
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             SFLAGS=${CFLAGS-"-Kconform_pic -O"}+
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             CFLAGS=${CFLAGS-"-O"}+
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             LDSHARED=${LDSHARED-"cc -G"};;+
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  OpenUNIX\ 5)+
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             SFLAGS=${CFLAGS-"-KPIC -O"}+
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             CFLAGS=${CFLAGS-"-O"}+
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             LDSHARED=${LDSHARED-"cc -G"};;+
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  AIX*)  # Courtesy of dbakker@arrayasolutions.com+
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             SFLAGS=${CFLAGS-"-O -qmaxmem=8192"}+
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             CFLAGS=${CFLAGS-"-O -qmaxmem=8192"}+
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             LDSHARED=${LDSHARED-"xlc -G"};;+
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  # send working options for other systems to support@gzip.org+
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  *)         SFLAGS=${CFLAGS-"-O"}+
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             CFLAGS=${CFLAGS-"-O"}+
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             LDSHARED=${LDSHARED-"cc -shared"};;+
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  esac+
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fi+
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+
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SHAREDLIB=${SHAREDLIB-"libz$shared_ext"}+
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SHAREDLIBV=${SHAREDLIBV-"libz$shared_ext.$VER"}+
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SHAREDLIBM=${SHAREDLIBM-"libz$shared_ext.$VER1"}+
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+
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if test $shared -eq 1; then+
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  echo Checking for shared library support...+
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  # we must test in two steps (cc then ld), required at least on SunOS 4.x+
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  if test "`($CC -c $SFLAGS $test.c) 2>&1`" = "" &&+
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     test "`($LDSHARED -o $test$shared_ext $test.o) 2>&1`" = ""; then+
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    CFLAGS="$SFLAGS"+
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    LIBS="$SHAREDLIBV"+
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    echo Building shared library $SHAREDLIBV with $CC.+
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  elif test -z "$old_cc" -a -z "$old_cflags"; then+
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    echo No shared library support.+
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    shared=0;+
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  else+
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    echo 'No shared library support; try without defining CC and CFLAGS'+
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    shared=0;+
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  fi+
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fi+
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if test $shared -eq 0; then+
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  LDSHARED="$CC"+
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  echo Building static library $LIBS version $VER with $CC.+
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else+
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  LDFLAGS="-L. ${SHAREDLIBV}"+
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fi+
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+
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cat > $test.c <<EOF+
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#include <unistd.h>+
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int main() { return 0; }+
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EOF+
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if test "`($CC -c $CFLAGS $test.c) 2>&1`" = ""; then+
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  sed < zconf.in.h "/HAVE_UNISTD_H/s%0%1%" > zconf.h+
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  echo "Checking for unistd.h... Yes."+
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else+
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  cp -p zconf.in.h zconf.h+
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  echo "Checking for unistd.h... No."+
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fi+
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+
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cat > $test.c <<EOF+
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#include <stdio.h>+
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#include <stdarg.h>+
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#include "zconf.h"+
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+
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int main()+
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{+
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#ifndef STDC+
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  choke me+
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#endif+
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+
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  return 0;+
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}+
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EOF+
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+
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if test "`($CC -c $CFLAGS $test.c) 2>&1`" = ""; then+
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  echo "Checking whether to use vs[n]printf() or s[n]printf()... using vs[n]printf()"+
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+
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  cat > $test.c <<EOF+
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#include <stdio.h>+
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#include <stdarg.h>+
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+
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int mytest(char *fmt, ...)+
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{+
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  char buf[20];+
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  va_list ap;+
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+
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  va_start(ap, fmt);+
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  vsnprintf(buf, sizeof(buf), fmt, ap);+
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  va_end(ap);+
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  return 0;+
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}+
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+
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int main()+
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{+
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  return (mytest("Hello%d\n", 1));+
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}+
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EOF+
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+
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  if test "`($CC $CFLAGS -o $test $test.c) 2>&1`" = ""; then+
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    echo "Checking for vsnprintf() in stdio.h... Yes."+
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+
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    cat >$test.c <<EOF+
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#include <stdio.h>+
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#include <stdarg.h>+
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+
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int mytest(char *fmt, ...)+
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{+
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  int n;+
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  char buf[20];+
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  va_list ap;+
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+
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  va_start(ap, fmt);+
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  n = vsnprintf(buf, sizeof(buf), fmt, ap);+
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  va_end(ap);+
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  return n;+
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}+
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+
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int main()+
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{+
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  return (mytest("Hello%d\n", 1));+
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}+
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EOF+
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+
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    if test "`($CC -c $CFLAGS $test.c) 2>&1`" = ""; then+
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      echo "Checking for return value of vsnprintf()... Yes."+
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    else+
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      CFLAGS="$CFLAGS -DHAS_vsnprintf_void"+
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      echo "Checking for return value of vsnprintf()... No."+
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      echo "  WARNING: apparently vsnprintf() does not return a value. zlib"+
−
      echo "  can build but will be open to possible string-format security"+
−
      echo "  vulnerabilities."+
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    fi+
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  else+
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    CFLAGS="$CFLAGS -DNO_vsnprintf"+
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    echo "Checking for vsnprintf() in stdio.h... No."+
−
    echo "  WARNING: vsnprintf() not found, falling back to vsprintf(). zlib"+
−
    echo "  can build but will be open to possible buffer-overflow security"+
−
    echo "  vulnerabilities."+
−
+
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    cat >$test.c <<EOF+
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#include <stdio.h>+
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#include <stdarg.h>+
−
+
−
int mytest(char *fmt, ...)+
−
{+
−
  int n;+
−
  char buf[20];+
−
  va_list ap;+
−
+
−
  va_start(ap, fmt);+
−
  n = vsprintf(buf, fmt, ap);+
−
  va_end(ap);+
−
  return n;+
−
}+
−
+
−
int main()+
−
{+
−
  return (mytest("Hello%d\n", 1));+
−
}+
−
EOF+
−
+
−
    if test "`($CC -c $CFLAGS $test.c) 2>&1`" = ""; then+
−
      echo "Checking for return value of vsprintf()... Yes."+
−
    else+
−
      CFLAGS="$CFLAGS -DHAS_vsprintf_void"+
−
      echo "Checking for return value of vsprintf()... No."+
−
      echo "  WARNING: apparently vsprintf() does not return a value. zlib"+
−
      echo "  can build but will be open to possible string-format security"+
−
      echo "  vulnerabilities."+
−
    fi+
−
  fi+
−
else+
−
  echo "Checking whether to use vs[n]printf() or s[n]printf()... using s[n]printf()"+
−
+
−
  cat >$test.c <<EOF+
−
#include <stdio.h>+
−
+
−
int mytest()+
−
{+
−
  char buf[20];+
−
+
−
  snprintf(buf, sizeof(buf), "%s", "foo");+
−
  return 0;+
−
}+
−
+
−
int main()+
−
{+
−
  return (mytest());+
−
}+
−
EOF+
−
+
−
  if test "`($CC $CFLAGS -o $test $test.c) 2>&1`" = ""; then+
−
    echo "Checking for snprintf() in stdio.h... Yes."+
−
+
−
    cat >$test.c <<EOF+
−
#include <stdio.h>+
−
+
−
int mytest()+
−
{+
−
  char buf[20];+
−
+
−
  return snprintf(buf, sizeof(buf), "%s", "foo");+
−
}+
−
+
−
int main()+
−
{+
−
  return (mytest());+
−
}+
−
EOF+
−
+
−
    if test "`($CC -c $CFLAGS $test.c) 2>&1`" = ""; then+
−
      echo "Checking for return value of snprintf()... Yes."+
−
    else+
−
      CFLAGS="$CFLAGS -DHAS_snprintf_void"+
−
      echo "Checking for return value of snprintf()... No."+
−
      echo "  WARNING: apparently snprintf() does not return a value. zlib"+
−
      echo "  can build but will be open to possible string-format security"+
−
      echo "  vulnerabilities."+
−
    fi+
−
  else+
−
    CFLAGS="$CFLAGS -DNO_snprintf"+
−
    echo "Checking for snprintf() in stdio.h... No."+
−
    echo "  WARNING: snprintf() not found, falling back to sprintf(). zlib"+
−
    echo "  can build but will be open to possible buffer-overflow security"+
−
    echo "  vulnerabilities."+
−
+
−
    cat >$test.c <<EOF+
−
#include <stdio.h>+
−
+
−
int mytest()+
−
{+
−
  char buf[20];+
−
+
−
  return sprintf(buf, "%s", "foo");+
−
}+
−
+
−
int main()+
−
{+
−
  return (mytest());+
−
}+
−
EOF+
−
+
−
    if test "`($CC -c $CFLAGS $test.c) 2>&1`" = ""; then+
−
      echo "Checking for return value of sprintf()... Yes."+
−
    else+
−
      CFLAGS="$CFLAGS -DHAS_sprintf_void"+
−
      echo "Checking for return value of sprintf()... No."+
−
      echo "  WARNING: apparently sprintf() does not return a value. zlib"+
−
      echo "  can build but will be open to possible string-format security"+
−
      echo "  vulnerabilities."+
−
    fi+
−
  fi+
−
fi+
−
+
−
cat >$test.c <<EOF+
−
#include <errno.h>+
−
int main() { return 0; }+
−
EOF+
−
if test "`($CC -c $CFLAGS $test.c) 2>&1`" = ""; then+
−
  echo "Checking for errno.h... Yes."+
−
else+
−
  echo "Checking for errno.h... No."+
−
  CFLAGS="$CFLAGS -DNO_ERRNO_H"+
−
fi+
−
+
−
cat > $test.c <<EOF+
−
#include <sys/types.h>+
−
#include <sys/mman.h>+
−
#include <sys/stat.h>+
−
caddr_t hello() {+
−
  return mmap((caddr_t)0, (off_t)0, PROT_READ, MAP_SHARED, 0, (off_t)0);+
−
}+
−
EOF+
−
if test "`($CC -c $CFLAGS $test.c) 2>&1`" = ""; then+
−
  CFLAGS="$CFLAGS -DUSE_MMAP"+
−
  echo Checking for mmap support... Yes.+
−
else+
−
  echo Checking for mmap support... No.+
−
fi+
−
+
−
CPP=${CPP-"$CC -E"}+
−
case $CFLAGS in+
−
  *ASMV*)+
−
    if test "`nm $test.o | grep _hello`" = ""; then+
−
      CPP="$CPP -DNO_UNDERLINE"+
−
      echo Checking for underline in external names... No.+
−
    else+
−
      echo Checking for underline in external names... Yes.+
−
    fi;;+
−
esac+
−
+
−
rm -f $test.[co] $test $test$shared_ext+
−
+
−
# udpate Makefile+
−
sed < Makefile.in "+
−
/^CC *=/s#=.*#=$CC#+
−
/^CFLAGS *=/s#=.*#=$CFLAGS#+
−
/^CPP *=/s#=.*#=$CPP#+
−
/^LDSHARED *=/s#=.*#=$LDSHARED#+
−
/^LIBS *=/s#=.*#=$LIBS#+
−
/^SHAREDLIB *=/s#=.*#=$SHAREDLIB#+
−
/^SHAREDLIBV *=/s#=.*#=$SHAREDLIBV#+
−
/^SHAREDLIBM *=/s#=.*#=$SHAREDLIBM#+
−
/^AR *=/s#=.*#=$AR#+
−
/^RANLIB *=/s#=.*#=$RANLIB#+
−
/^EXE *=/s#=.*#=$EXE#+
−
/^prefix *=/s#=.*#=$prefix#+
−
/^exec_prefix *=/s#=.*#=$exec_prefix#+
−
/^libdir *=/s#=.*#=$libdir#+
−
/^includedir *=/s#=.*#=$includedir#+
−
/^mandir *=/s#=.*#=$mandir#+
−
/^LDFLAGS *=/s#=.*#=$LDFLAGS#+
−
" > Makefile+
−