#!/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.aLDFLAGS="-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-'${prefix}/share/man'}shared_ext='.so'shared=0gcc=0old_cc="$CC"old_cflags="$CFLAGS"while test $# -ge 1docase "$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;;    esacdonetest=ztest$$cat > $test.c <<EOFextern int getchar();int hello() {return getchar();}EOFtest -z "$CC" && echo Checking for gcc...cc=${CC-gcc}cflags=${CFLAGS-"-O3"}# to force the asm version use: CFLAGS="-O3 -DASMV" ./configurecase "$cc" in  *gcc*) gcc=1;;esacif test "$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* )             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 $SFLAGS"}                 shared_ext='.sl'                 SHAREDLIB='libz.sl';;  Darwin*)   shared_ext='.dylib'             SHAREDLIB=libz$shared_ext             SHAREDLIBV=libz.$VER$shared_ext             SHAREDLIBM=libz.$VER1$shared_ext             LDSHARED=${LDSHARED-"$cc -dynamiclib -install_name /usr/lib/$SHAREDLIBV -compatibility_version $VER2 -current_version $VER"}             libdir='/usr/lib'             includedir='/usr/include';;  *)             LDSHARED=${LDSHARED-"$cc -shared"};;  esacelse  # find system name and corresponding cc options  CC=${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"}             shared_ext='.sl'             SHAREDLIB='libz.sl';;  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"};;  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=${LDSHARED-"cc -shared"};;  esacfiSHAREDLIB=${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;  fifiif test $shared -eq 0; then  LDSHARED="$CC"  echo Building static library $LIBS version $VER with $CC.else  LDFLAGS="-L. ${SHAREDLIBV}"ficat > $test.c <<EOF#include <unistd.h>int main() { return 0; }EOFif test "`($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."ficat > $test.c <<EOF#include <stdio.h>#include <stdarg.h>#include "zconf.h"int main(){#ifndef STDC  choke me#endif  return 0;}EOFif test "`($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  fielse  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  fificat >$test.c <<EOF#include <errno.h>int main() { return 0; }EOFif test "`($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"ficat > $test.c <<EOF#include <sys/types.h>#include <sys/mman.h>#include <sys/stat.h>caddr_t hello() {  return mmap((caddr_t)0, (off_t)0, PROT_READ, MAP_SHARED, 0, (off_t)0);}EOFif test "`($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.fiCPP=${CPP-"$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;;esacrm -f $test.[co] $test $test$shared_ext# udpate Makefilesed < 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