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