Chris@4: #!/bin/sh
Chris@4: # configure script for zlib.
Chris@4: #
Chris@4: # Normally configure builds both a static and a shared library.
Chris@4: # If you want to build just a static library, use: ./configure --static
Chris@4: #
Chris@4: # To impose specific compiler or flags or install directory, use for example:
Chris@4: #    prefix=$HOME CC=cc CFLAGS="-O4" ./configure
Chris@4: # or for csh/tcsh users:
Chris@4: #    (setenv prefix $HOME; setenv CC cc; setenv CFLAGS "-O4"; ./configure)
Chris@4: 
Chris@4: # Incorrect settings of CC or CFLAGS may prevent creating a shared library.
Chris@4: # If you have problems, try without defining CC and CFLAGS before reporting
Chris@4: # an error.
Chris@4: 
Chris@4: # start off configure.log
Chris@4: echo -------------------- >> configure.log
Chris@4: echo $0 $* >> configure.log
Chris@4: date >> configure.log
Chris@4: 
Chris@4: # set command prefix for cross-compilation
Chris@4: if [ -n "${CHOST}" ]; then
Chris@4:     uname="`echo "${CHOST}" | sed -e 's/^[^-]*-\([^-]*\)$/\1/' -e 's/^[^-]*-[^-]*-\([^-]*\)$/\1/' -e 's/^[^-]*-[^-]*-\([^-]*\)-.*$/\1/'`"
Chris@4:     CROSS_PREFIX="${CHOST}-"
Chris@4: fi
Chris@4: 
Chris@4: # destination name for static library
Chris@4: STATICLIB=libz.a
Chris@4: 
Chris@4: # extract zlib version numbers from zlib.h
Chris@4: VER=`sed -n -e '/VERSION "/s/.*"\(.*\)".*/\1/p' < zlib.h`
Chris@4: VER3=`sed -n -e '/VERSION "/s/.*"\([0-9]*\\.[0-9]*\\.[0-9]*\).*/\1/p' < zlib.h`
Chris@4: VER2=`sed -n -e '/VERSION "/s/.*"\([0-9]*\\.[0-9]*\)\\..*/\1/p' < zlib.h`
Chris@4: VER1=`sed -n -e '/VERSION "/s/.*"\([0-9]*\)\\..*/\1/p' < zlib.h`
Chris@4: 
Chris@4: # establish commands for library building
Chris@4: if "${CROSS_PREFIX}ar" --version >/dev/null 2>/dev/null || test $? -lt 126; then
Chris@4:     AR=${AR-"${CROSS_PREFIX}ar"}
Chris@4:     test -n "${CROSS_PREFIX}" && echo Using ${AR} | tee -a configure.log
Chris@4: else
Chris@4:     AR=${AR-"ar"}
Chris@4:     test -n "${CROSS_PREFIX}" && echo Using ${AR} | tee -a configure.log
Chris@4: fi
Chris@4: ARFLAGS=${ARFLAGS-"rc"}
Chris@4: if "${CROSS_PREFIX}ranlib" --version >/dev/null 2>/dev/null || test $? -lt 126; then
Chris@4:     RANLIB=${RANLIB-"${CROSS_PREFIX}ranlib"}
Chris@4:     test -n "${CROSS_PREFIX}" && echo Using ${RANLIB} | tee -a configure.log
Chris@4: else
Chris@4:     RANLIB=${RANLIB-"ranlib"}
Chris@4: fi
Chris@4: if "${CROSS_PREFIX}nm" --version >/dev/null 2>/dev/null || test $? -lt 126; then
Chris@4:     NM=${NM-"${CROSS_PREFIX}nm"}
Chris@4:     test -n "${CROSS_PREFIX}" && echo Using ${NM} | tee -a configure.log
Chris@4: else
Chris@4:     NM=${NM-"nm"}
Chris@4: fi
Chris@4: 
Chris@4: # set defaults before processing command line options
Chris@4: LDCONFIG=${LDCONFIG-"ldconfig"}
Chris@4: LDSHAREDLIBC="${LDSHAREDLIBC--lc}"
Chris@4: ARCHS=
Chris@4: prefix=${prefix-/usr/local}
Chris@4: exec_prefix=${exec_prefix-'${prefix}'}
Chris@4: libdir=${libdir-'${exec_prefix}/lib'}
Chris@4: sharedlibdir=${sharedlibdir-'${libdir}'}
Chris@4: includedir=${includedir-'${prefix}/include'}
Chris@4: mandir=${mandir-'${prefix}/share/man'}
Chris@4: shared_ext='.so'
Chris@4: shared=1
Chris@4: solo=0
Chris@4: cover=0
Chris@4: zprefix=0
Chris@4: build64=0
Chris@4: gcc=0
Chris@4: old_cc="$CC"
Chris@4: old_cflags="$CFLAGS"
Chris@4: OBJC='$(OBJZ) $(OBJG)'
Chris@4: PIC_OBJC='$(PIC_OBJZ) $(PIC_OBJG)'
Chris@4: 
Chris@4: # process command line options
Chris@4: while test $# -ge 1
Chris@4: do
Chris@4: case "$1" in
Chris@4:     -h* | --help)
Chris@4:       echo 'usage:' | tee -a configure.log
Chris@4:       echo '  configure [--zprefix] [--prefix=PREFIX]  [--eprefix=EXPREFIX]' | tee -a configure.log
Chris@4:       echo '    [--static] [--64] [--libdir=LIBDIR] [--sharedlibdir=LIBDIR]' | tee -a configure.log
Chris@4:       echo '    [--includedir=INCLUDEDIR] [--archs="-arch i386 -arch x86_64"]' | tee -a configure.log
Chris@4:         exit 0 ;;
Chris@4:     -p*=* | --prefix=*) prefix=`echo $1 | sed 's/.*=//'`; shift ;;
Chris@4:     -e*=* | --eprefix=*) exec_prefix=`echo $1 | sed 's/.*=//'`; shift ;;
Chris@4:     -l*=* | --libdir=*) libdir=`echo $1 | sed 's/.*=//'`; shift ;;
Chris@4:     --sharedlibdir=*) sharedlibdir=`echo $1 | sed 's/.*=//'`; shift ;;
Chris@4:     -i*=* | --includedir=*) includedir=`echo $1 | sed 's/.*=//'`;shift ;;
Chris@4:     -u*=* | --uname=*) uname=`echo $1 | sed 's/.*=//'`;shift ;;
Chris@4:     -p* | --prefix) prefix="$2"; shift; shift ;;
Chris@4:     -e* | --eprefix) exec_prefix="$2"; shift; shift ;;
Chris@4:     -l* | --libdir) libdir="$2"; shift; shift ;;
Chris@4:     -i* | --includedir) includedir="$2"; shift; shift ;;
Chris@4:     -s* | --shared | --enable-shared) shared=1; shift ;;
Chris@4:     -t | --static) shared=0; shift ;;
Chris@4:     --solo) solo=1; shift ;;
Chris@4:     --cover) cover=1; shift ;;
Chris@4:     -z* | --zprefix) zprefix=1; shift ;;
Chris@4:     -6* | --64) build64=1; shift ;;
Chris@4:     -a*=* | --archs=*) ARCHS=`echo $1 | sed 's/.*=//'`; shift ;;
Chris@4:     --sysconfdir=*) echo "ignored option: --sysconfdir" | tee -a configure.log; shift ;;
Chris@4:     --localstatedir=*) echo "ignored option: --localstatedir" | tee -a configure.log; shift ;;
Chris@4:     *) echo "unknown option: $1"; echo "$0 --help for help" | tee -a configure.log; exit 1 ;;
Chris@4:     esac
Chris@4: done
Chris@4: 
Chris@4: # define functions for testing compiler and library characteristics and logging the results
Chris@4: test=ztest$$
Chris@4: 
Chris@4: show()
Chris@4: {
Chris@4:   case "$*" in
Chris@4:     *$test.c*)
Chris@4:       echo === $test.c === >> configure.log
Chris@4:       cat $test.c >> configure.log
Chris@4:       echo === >> configure.log;;
Chris@4:   esac
Chris@4:   echo $* >> configure.log
Chris@4: }
Chris@4: 
Chris@4: cat > $test.c <<EOF
Chris@4: #error error
Chris@4: EOF
Chris@4: if ($CC -c $CFLAGS $test.c) 2>/dev/null; then
Chris@4:   try()
Chris@4:   {
Chris@4:     show $*
Chris@4:     test "`( $* ) 2>&1 | tee -a configure.log`" = ""
Chris@4:   }
Chris@4:   echo - using any output from compiler to indicate an error >> configure.log
Chris@4: else
Chris@4:   try()
Chris@4:   {
Chris@4:     show $*
Chris@4:     ( $* ) >> configure.log 2>&1
Chris@4:     ret=$?
Chris@4:     if test $ret -ne 0; then
Chris@4:       echo "(exit code "$ret")" >> configure.log
Chris@4:     fi
Chris@4:     return $ret
Chris@4:   }
Chris@4: fi
Chris@4: 
Chris@4: tryboth()
Chris@4: {
Chris@4:   show $*
Chris@4:   got=`( $* ) 2>&1`
Chris@4:   ret=$?
Chris@4:   printf %s "$got" >> configure.log
Chris@4:   if test $ret -ne 0; then
Chris@4:     return $ret
Chris@4:   fi
Chris@4:   test "$got" = ""
Chris@4: }
Chris@4: 
Chris@4: echo >> configure.log
Chris@4: 
Chris@4: # check for gcc vs. cc and set compile and link flags based on the system identified by uname
Chris@4: cat > $test.c <<EOF
Chris@4: extern int getchar();
Chris@4: int hello() {return getchar();}
Chris@4: EOF
Chris@4: 
Chris@4: test -z "$CC" && echo Checking for ${CROSS_PREFIX}gcc... | tee -a configure.log
Chris@4: cc=${CC-${CROSS_PREFIX}gcc}
Chris@4: cflags=${CFLAGS-"-O3"}
Chris@4: # to force the asm version use: CFLAGS="-O3 -DASMV" ./configure
Chris@4: case "$cc" in
Chris@4:   *gcc*) gcc=1 ;;
Chris@4:   *clang*) gcc=1 ;;
Chris@4: esac
Chris@4: case `$cc -v 2>&1` in
Chris@4:   *gcc*) gcc=1 ;;
Chris@4: esac
Chris@4: 
Chris@4: show $cc -c $cflags $test.c
Chris@4: if test "$gcc" -eq 1 && ($cc -c $cflags $test.c) >> configure.log 2>&1; then
Chris@4:   echo ... using gcc >> configure.log
Chris@4:   CC="$cc"
Chris@4:   CFLAGS="${CFLAGS--O3} ${ARCHS}"
Chris@4:   SFLAGS="${CFLAGS--O3} -fPIC"
Chris@4:   LDFLAGS="${LDFLAGS} ${ARCHS}"
Chris@4:   if test $build64 -eq 1; then
Chris@4:     CFLAGS="${CFLAGS} -m64"
Chris@4:     SFLAGS="${SFLAGS} -m64"
Chris@4:   fi
Chris@4:   if test "${ZLIBGCCWARN}" = "YES"; then
Chris@4:     CFLAGS="${CFLAGS} -Wall -Wextra -pedantic"
Chris@4:   fi
Chris@4:   if test -z "$uname"; then
Chris@4:     uname=`(uname -s || echo unknown) 2>/dev/null`
Chris@4:   fi
Chris@4:   case "$uname" in
Chris@4:   Linux* | linux* | GNU | GNU/* | solaris*)
Chris@4:         LDSHARED=${LDSHARED-"$cc -shared -Wl,-soname,libz.so.1,--version-script,zlib.map"} ;;
Chris@4:   *BSD | *bsd* | DragonFly)
Chris@4:         LDSHARED=${LDSHARED-"$cc -shared -Wl,-soname,libz.so.1,--version-script,zlib.map"}
Chris@4:         LDCONFIG="ldconfig -m" ;;
Chris@4:   CYGWIN* | Cygwin* | cygwin* | OS/2*)
Chris@4:         EXE='.exe' ;;
Chris@4:   MINGW* | mingw*)
Chris@4: # temporary bypass
Chris@4:         rm -f $test.[co] $test $test$shared_ext
Chris@4:         echo "Please use win32/Makefile.gcc instead." | tee -a configure.log
Chris@4:         exit 1
Chris@4:         LDSHARED=${LDSHARED-"$cc -shared"}
Chris@4:         LDSHAREDLIBC=""
Chris@4:         EXE='.exe' ;;
Chris@4:   QNX*)  # This is for QNX6. I suppose that the QNX rule below is for QNX2,QNX4
Chris@4:          # (alain.bonnefoy@icbt.com)
Chris@4:                  LDSHARED=${LDSHARED-"$cc -shared -Wl,-hlibz.so.1"} ;;
Chris@4:   HP-UX*)
Chris@4:          LDSHARED=${LDSHARED-"$cc -shared $SFLAGS"}
Chris@4:          case `(uname -m || echo unknown) 2>/dev/null` in
Chris@4:          ia64)
Chris@4:                  shared_ext='.so'
Chris@4:                  SHAREDLIB='libz.so' ;;
Chris@4:          *)
Chris@4:                  shared_ext='.sl'
Chris@4:                  SHAREDLIB='libz.sl' ;;
Chris@4:          esac ;;
Chris@4:   Darwin* | darwin*)
Chris@4:              shared_ext='.dylib'
Chris@4:              SHAREDLIB=libz$shared_ext
Chris@4:              SHAREDLIBV=libz.$VER$shared_ext
Chris@4:              SHAREDLIBM=libz.$VER1$shared_ext
Chris@4:              LDSHARED=${LDSHARED-"$cc -dynamiclib -install_name $libdir/$SHAREDLIBM -compatibility_version $VER1 -current_version $VER3"}
Chris@4:              AR="/usr/bin/libtool"
Chris@4:              ARFLAGS="-o" ;;
Chris@4:   *)             LDSHARED=${LDSHARED-"$cc -shared"} ;;
Chris@4:   esac
Chris@4: else
Chris@4:   # find system name and corresponding cc options
Chris@4:   CC=${CC-cc}
Chris@4:   gcc=0
Chris@4:   echo ... using $CC >> configure.log
Chris@4:   if test -z "$uname"; then
Chris@4:     uname=`(uname -sr || echo unknown) 2>/dev/null`
Chris@4:   fi
Chris@4:   case "$uname" in
Chris@4:   HP-UX*)    SFLAGS=${CFLAGS-"-O +z"}
Chris@4:              CFLAGS=${CFLAGS-"-O"}
Chris@4: #            LDSHARED=${LDSHARED-"ld -b +vnocompatwarnings"}
Chris@4:              LDSHARED=${LDSHARED-"ld -b"}
Chris@4:          case `(uname -m || echo unknown) 2>/dev/null` in
Chris@4:          ia64)
Chris@4:              shared_ext='.so'
Chris@4:              SHAREDLIB='libz.so' ;;
Chris@4:          *)
Chris@4:              shared_ext='.sl'
Chris@4:              SHAREDLIB='libz.sl' ;;
Chris@4:          esac ;;
Chris@4:   IRIX*)     SFLAGS=${CFLAGS-"-ansi -O2 -rpath ."}
Chris@4:              CFLAGS=${CFLAGS-"-ansi -O2"}
Chris@4:              LDSHARED=${LDSHARED-"cc -shared -Wl,-soname,libz.so.1"} ;;
Chris@4:   OSF1\ V4*) SFLAGS=${CFLAGS-"-O -std1"}
Chris@4:              CFLAGS=${CFLAGS-"-O -std1"}
Chris@4:              LDFLAGS="${LDFLAGS} -Wl,-rpath,."
Chris@4:              LDSHARED=${LDSHARED-"cc -shared  -Wl,-soname,libz.so -Wl,-msym -Wl,-rpath,$(libdir) -Wl,-set_version,${VER}:1.0"} ;;
Chris@4:   OSF1*)     SFLAGS=${CFLAGS-"-O -std1"}
Chris@4:              CFLAGS=${CFLAGS-"-O -std1"}
Chris@4:              LDSHARED=${LDSHARED-"cc -shared -Wl,-soname,libz.so.1"} ;;
Chris@4:   QNX*)      SFLAGS=${CFLAGS-"-4 -O"}
Chris@4:              CFLAGS=${CFLAGS-"-4 -O"}
Chris@4:              LDSHARED=${LDSHARED-"cc"}
Chris@4:              RANLIB=${RANLIB-"true"}
Chris@4:              AR="cc"
Chris@4:              ARFLAGS="-A" ;;
Chris@4:   SCO_SV\ 3.2*) SFLAGS=${CFLAGS-"-O3 -dy -KPIC "}
Chris@4:              CFLAGS=${CFLAGS-"-O3"}
Chris@4:              LDSHARED=${LDSHARED-"cc -dy -KPIC -G"} ;;
Chris@4:   SunOS\ 5* | solaris*)
Chris@4:          LDSHARED=${LDSHARED-"cc -G -h libz$shared_ext.$VER1"}
Chris@4:          SFLAGS=${CFLAGS-"-fast -KPIC"}
Chris@4:          CFLAGS=${CFLAGS-"-fast"}
Chris@4:          if test $build64 -eq 1; then
Chris@4:              # old versions of SunPRO/Workshop/Studio don't support -m64,
Chris@4:              # but newer ones do.  Check for it.
Chris@4:              flag64=`$CC -flags | egrep -- '^-m64'`
Chris@4:              if test x"$flag64" != x"" ; then
Chris@4:                  CFLAGS="${CFLAGS} -m64"
Chris@4:                  SFLAGS="${SFLAGS} -m64"
Chris@4:              else
Chris@4:                  case `(uname -m || echo unknown) 2>/dev/null` in
Chris@4:                    i86*)
Chris@4:                      SFLAGS="$SFLAGS -xarch=amd64"
Chris@4:                      CFLAGS="$CFLAGS -xarch=amd64" ;;
Chris@4:                    *)
Chris@4:                      SFLAGS="$SFLAGS -xarch=v9"
Chris@4:                      CFLAGS="$CFLAGS -xarch=v9" ;;
Chris@4:                  esac
Chris@4:              fi
Chris@4:          fi
Chris@4:          ;;
Chris@4:   SunOS\ 4*) SFLAGS=${CFLAGS-"-O2 -PIC"}
Chris@4:              CFLAGS=${CFLAGS-"-O2"}
Chris@4:              LDSHARED=${LDSHARED-"ld"} ;;
Chris@4:   SunStudio\ 9*) SFLAGS=${CFLAGS-"-fast -xcode=pic32 -xtarget=ultra3 -xarch=v9b"}
Chris@4:              CFLAGS=${CFLAGS-"-fast -xtarget=ultra3 -xarch=v9b"}
Chris@4:              LDSHARED=${LDSHARED-"cc -xarch=v9b"} ;;
Chris@4:   UNIX_System_V\ 4.2.0)
Chris@4:              SFLAGS=${CFLAGS-"-KPIC -O"}
Chris@4:              CFLAGS=${CFLAGS-"-O"}
Chris@4:              LDSHARED=${LDSHARED-"cc -G"} ;;
Chris@4:   UNIX_SV\ 4.2MP)
Chris@4:              SFLAGS=${CFLAGS-"-Kconform_pic -O"}
Chris@4:              CFLAGS=${CFLAGS-"-O"}
Chris@4:              LDSHARED=${LDSHARED-"cc -G"} ;;
Chris@4:   OpenUNIX\ 5)
Chris@4:              SFLAGS=${CFLAGS-"-KPIC -O"}
Chris@4:              CFLAGS=${CFLAGS-"-O"}
Chris@4:              LDSHARED=${LDSHARED-"cc -G"} ;;
Chris@4:   AIX*)  # Courtesy of dbakker@arrayasolutions.com
Chris@4:              SFLAGS=${CFLAGS-"-O -qmaxmem=8192"}
Chris@4:              CFLAGS=${CFLAGS-"-O -qmaxmem=8192"}
Chris@4:              LDSHARED=${LDSHARED-"xlc -G"} ;;
Chris@4:   # send working options for other systems to zlib@gzip.org
Chris@4:   *)         SFLAGS=${CFLAGS-"-O"}
Chris@4:              CFLAGS=${CFLAGS-"-O"}
Chris@4:              LDSHARED=${LDSHARED-"cc -shared"} ;;
Chris@4:   esac
Chris@4: fi
Chris@4: 
Chris@4: # destination names for shared library if not defined above
Chris@4: SHAREDLIB=${SHAREDLIB-"libz$shared_ext"}
Chris@4: SHAREDLIBV=${SHAREDLIBV-"libz$shared_ext.$VER"}
Chris@4: SHAREDLIBM=${SHAREDLIBM-"libz$shared_ext.$VER1"}
Chris@4: 
Chris@4: echo >> configure.log
Chris@4: 
Chris@4: # see if shared library build supported
Chris@4: if test $shared -eq 1; then
Chris@4:   echo Checking for shared library support... | tee -a configure.log
Chris@4:   # we must test in two steps (cc then ld), required at least on SunOS 4.x
Chris@4:   if try $CC -w -c $SFLAGS $test.c &&
Chris@4:      try $LDSHARED $SFLAGS -o $test$shared_ext $test.o; then
Chris@4:     echo Building shared library $SHAREDLIBV with $CC. | tee -a configure.log
Chris@4:   elif test -z "$old_cc" -a -z "$old_cflags"; then
Chris@4:     echo No shared library support. | tee -a configure.log
Chris@4:     shared=0;
Chris@4:   else
Chris@4:     echo 'No shared library support; try without defining CC and CFLAGS' | tee -a configure.log
Chris@4:     shared=0;
Chris@4:   fi
Chris@4: fi
Chris@4: if test $shared -eq 0; then
Chris@4:   LDSHARED="$CC"
Chris@4:   ALL="static"
Chris@4:   TEST="all teststatic"
Chris@4:   SHAREDLIB=""
Chris@4:   SHAREDLIBV=""
Chris@4:   SHAREDLIBM=""
Chris@4:   echo Building static library $STATICLIB version $VER with $CC. | tee -a configure.log
Chris@4: else
Chris@4:   ALL="static shared"
Chris@4:   TEST="all teststatic testshared"
Chris@4: fi
Chris@4: 
Chris@4: echo >> configure.log
Chris@4: 
Chris@4: # check for underscores in external names for use by assembler code
Chris@4: CPP=${CPP-"$CC -E"}
Chris@4: case $CFLAGS in
Chris@4:   *ASMV*)
Chris@4:     echo >> configure.log
Chris@4:     show "$NM $test.o | grep _hello"
Chris@4:     if test "`$NM $test.o | grep _hello | tee -a configure.log`" = ""; then
Chris@4:       CPP="$CPP -DNO_UNDERLINE"
Chris@4:       echo Checking for underline in external names... No. | tee -a configure.log
Chris@4:     else
Chris@4:       echo Checking for underline in external names... Yes. | tee -a configure.log
Chris@4:     fi ;;
Chris@4: esac
Chris@4: 
Chris@4: echo >> configure.log
Chris@4: 
Chris@4: # check for large file support, and if none, check for fseeko()
Chris@4: cat > $test.c <<EOF
Chris@4: #include <sys/types.h>
Chris@4: off64_t dummy = 0;
Chris@4: EOF
Chris@4: if try $CC -c $CFLAGS -D_LARGEFILE64_SOURCE=1 $test.c; then
Chris@4:   CFLAGS="${CFLAGS} -D_LARGEFILE64_SOURCE=1"
Chris@4:   SFLAGS="${SFLAGS} -D_LARGEFILE64_SOURCE=1"
Chris@4:   ALL="${ALL} all64"
Chris@4:   TEST="${TEST} test64"
Chris@4:   echo "Checking for off64_t... Yes." | tee -a configure.log
Chris@4:   echo "Checking for fseeko... Yes." | tee -a configure.log
Chris@4: else
Chris@4:   echo "Checking for off64_t... No." | tee -a configure.log
Chris@4:   echo >> configure.log
Chris@4:   cat > $test.c <<EOF
Chris@4: #include <stdio.h>
Chris@4: int main(void) {
Chris@4:   fseeko(NULL, 0, 0);
Chris@4:   return 0;
Chris@4: }
Chris@4: EOF
Chris@4:   if try $CC $CFLAGS -o $test $test.c; then
Chris@4:     echo "Checking for fseeko... Yes." | tee -a configure.log
Chris@4:   else
Chris@4:     CFLAGS="${CFLAGS} -DNO_FSEEKO"
Chris@4:     SFLAGS="${SFLAGS} -DNO_FSEEKO"
Chris@4:     echo "Checking for fseeko... No." | tee -a configure.log
Chris@4:   fi
Chris@4: fi
Chris@4: 
Chris@4: echo >> configure.log
Chris@4: 
Chris@4: # check for strerror() for use by gz* functions
Chris@4: cat > $test.c <<EOF
Chris@4: #include <string.h>
Chris@4: #include <errno.h>
Chris@4: int main() { return strlen(strerror(errno)); }
Chris@4: EOF
Chris@4: if try $CC $CFLAGS -o $test $test.c; then
Chris@4:   echo "Checking for strerror... Yes." | tee -a configure.log
Chris@4: else
Chris@4:   CFLAGS="${CFLAGS} -DNO_STRERROR"
Chris@4:   SFLAGS="${SFLAGS} -DNO_STRERROR"
Chris@4:   echo "Checking for strerror... No." | tee -a configure.log
Chris@4: fi
Chris@4: 
Chris@4: # copy clean zconf.h for subsequent edits
Chris@4: cp -p zconf.h.in zconf.h
Chris@4: 
Chris@4: echo >> configure.log
Chris@4: 
Chris@4: # check for unistd.h and save result in zconf.h
Chris@4: cat > $test.c <<EOF
Chris@4: #include <unistd.h>
Chris@4: int main() { return 0; }
Chris@4: EOF
Chris@4: if try $CC -c $CFLAGS $test.c; then
Chris@4:   sed < zconf.h "/^#ifdef HAVE_UNISTD_H.* may be/s/def HAVE_UNISTD_H\(.*\) may be/ 1\1 was/" > zconf.temp.h
Chris@4:   mv zconf.temp.h zconf.h
Chris@4:   echo "Checking for unistd.h... Yes." | tee -a configure.log
Chris@4: else
Chris@4:   echo "Checking for unistd.h... No." | tee -a configure.log
Chris@4: fi
Chris@4: 
Chris@4: echo >> configure.log
Chris@4: 
Chris@4: # check for stdarg.h and save result in zconf.h
Chris@4: cat > $test.c <<EOF
Chris@4: #include <stdarg.h>
Chris@4: int main() { return 0; }
Chris@4: EOF
Chris@4: if try $CC -c $CFLAGS $test.c; then
Chris@4:   sed < zconf.h "/^#ifdef HAVE_STDARG_H.* may be/s/def HAVE_STDARG_H\(.*\) may be/ 1\1 was/" > zconf.temp.h
Chris@4:   mv zconf.temp.h zconf.h
Chris@4:   echo "Checking for stdarg.h... Yes." | tee -a configure.log
Chris@4: else
Chris@4:   echo "Checking for stdarg.h... No." | tee -a configure.log
Chris@4: fi
Chris@4: 
Chris@4: # if the z_ prefix was requested, save that in zconf.h
Chris@4: if test $zprefix -eq 1; then
Chris@4:   sed < zconf.h "/#ifdef Z_PREFIX.* may be/s/def Z_PREFIX\(.*\) may be/ 1\1 was/" > zconf.temp.h
Chris@4:   mv zconf.temp.h zconf.h
Chris@4:   echo >> configure.log
Chris@4:   echo "Using z_ prefix on all symbols." | tee -a configure.log
Chris@4: fi
Chris@4: 
Chris@4: # if --solo compilation was requested, save that in zconf.h and remove gz stuff from object lists
Chris@4: if test $solo -eq 1; then
Chris@4:   sed '/#define ZCONF_H/a\
Chris@4: #define Z_SOLO
Chris@4: 
Chris@4: ' < zconf.h > zconf.temp.h
Chris@4:   mv zconf.temp.h zconf.h
Chris@4: OBJC='$(OBJZ)'
Chris@4: PIC_OBJC='$(PIC_OBJZ)'
Chris@4: fi
Chris@4: 
Chris@4: # if code coverage testing was requested, use older gcc if defined, e.g. "gcc-4.2" on Mac OS X
Chris@4: if test $cover -eq 1; then
Chris@4:   CFLAGS="${CFLAGS} -fprofile-arcs -ftest-coverage"
Chris@4:   if test -n "$GCC_CLASSIC"; then
Chris@4:     CC=$GCC_CLASSIC
Chris@4:   fi
Chris@4: fi
Chris@4: 
Chris@4: echo >> configure.log
Chris@4: 
Chris@4: # conduct a series of tests to resolve eight possible cases of using "vs" or "s" printf functions
Chris@4: # (using stdarg or not), with or without "n" (proving size of buffer), and with or without a
Chris@4: # return value.  The most secure result is vsnprintf() with a return value.  snprintf() with a
Chris@4: # return value is secure as well, but then gzprintf() will be limited to 20 arguments.
Chris@4: cat > $test.c <<EOF
Chris@4: #include <stdio.h>
Chris@4: #include <stdarg.h>
Chris@4: #include "zconf.h"
Chris@4: int main()
Chris@4: {
Chris@4: #ifndef STDC
Chris@4:   choke me
Chris@4: #endif
Chris@4:   return 0;
Chris@4: }
Chris@4: EOF
Chris@4: if try $CC -c $CFLAGS $test.c; then
Chris@4:   echo "Checking whether to use vs[n]printf() or s[n]printf()... using vs[n]printf()." | tee -a configure.log
Chris@4: 
Chris@4:   echo >> configure.log
Chris@4:   cat > $test.c <<EOF
Chris@4: #include <stdio.h>
Chris@4: #include <stdarg.h>
Chris@4: int mytest(const char *fmt, ...)
Chris@4: {
Chris@4:   char buf[20];
Chris@4:   va_list ap;
Chris@4:   va_start(ap, fmt);
Chris@4:   vsnprintf(buf, sizeof(buf), fmt, ap);
Chris@4:   va_end(ap);
Chris@4:   return 0;
Chris@4: }
Chris@4: int main()
Chris@4: {
Chris@4:   return (mytest("Hello%d\n", 1));
Chris@4: }
Chris@4: EOF
Chris@4:   if try $CC $CFLAGS -o $test $test.c; then
Chris@4:     echo "Checking for vsnprintf() in stdio.h... Yes." | tee -a configure.log
Chris@4: 
Chris@4:     echo >> configure.log
Chris@4:     cat >$test.c <<EOF
Chris@4: #include <stdio.h>
Chris@4: #include <stdarg.h>
Chris@4: int mytest(const char *fmt, ...)
Chris@4: {
Chris@4:   int n;
Chris@4:   char buf[20];
Chris@4:   va_list ap;
Chris@4:   va_start(ap, fmt);
Chris@4:   n = vsnprintf(buf, sizeof(buf), fmt, ap);
Chris@4:   va_end(ap);
Chris@4:   return n;
Chris@4: }
Chris@4: int main()
Chris@4: {
Chris@4:   return (mytest("Hello%d\n", 1));
Chris@4: }
Chris@4: EOF
Chris@4: 
Chris@4:     if try $CC -c $CFLAGS $test.c; then
Chris@4:       echo "Checking for return value of vsnprintf()... Yes." | tee -a configure.log
Chris@4:     else
Chris@4:       CFLAGS="$CFLAGS -DHAS_vsnprintf_void"
Chris@4:       SFLAGS="$SFLAGS -DHAS_vsnprintf_void"
Chris@4:       echo "Checking for return value of vsnprintf()... No." | tee -a configure.log
Chris@4:       echo "  WARNING: apparently vsnprintf() does not return a value. zlib" | tee -a configure.log
Chris@4:       echo "  can build but will be open to possible string-format security" | tee -a configure.log
Chris@4:       echo "  vulnerabilities." | tee -a configure.log
Chris@4:     fi
Chris@4:   else
Chris@4:     CFLAGS="$CFLAGS -DNO_vsnprintf"
Chris@4:     SFLAGS="$SFLAGS -DNO_vsnprintf"
Chris@4:     echo "Checking for vsnprintf() in stdio.h... No." | tee -a configure.log
Chris@4:     echo "  WARNING: vsnprintf() not found, falling back to vsprintf(). zlib" | tee -a configure.log
Chris@4:     echo "  can build but will be open to possible buffer-overflow security" | tee -a configure.log
Chris@4:     echo "  vulnerabilities." | tee -a configure.log
Chris@4: 
Chris@4:     echo >> configure.log
Chris@4:     cat >$test.c <<EOF
Chris@4: #include <stdio.h>
Chris@4: #include <stdarg.h>
Chris@4: int mytest(const char *fmt, ...)
Chris@4: {
Chris@4:   int n;
Chris@4:   char buf[20];
Chris@4:   va_list ap;
Chris@4:   va_start(ap, fmt);
Chris@4:   n = vsprintf(buf, fmt, ap);
Chris@4:   va_end(ap);
Chris@4:   return n;
Chris@4: }
Chris@4: int main()
Chris@4: {
Chris@4:   return (mytest("Hello%d\n", 1));
Chris@4: }
Chris@4: EOF
Chris@4: 
Chris@4:     if try $CC -c $CFLAGS $test.c; then
Chris@4:       echo "Checking for return value of vsprintf()... Yes." | tee -a configure.log
Chris@4:     else
Chris@4:       CFLAGS="$CFLAGS -DHAS_vsprintf_void"
Chris@4:       SFLAGS="$SFLAGS -DHAS_vsprintf_void"
Chris@4:       echo "Checking for return value of vsprintf()... No." | tee -a configure.log
Chris@4:       echo "  WARNING: apparently vsprintf() does not return a value. zlib" | tee -a configure.log
Chris@4:       echo "  can build but will be open to possible string-format security" | tee -a configure.log
Chris@4:       echo "  vulnerabilities." | tee -a configure.log
Chris@4:     fi
Chris@4:   fi
Chris@4: else
Chris@4:   echo "Checking whether to use vs[n]printf() or s[n]printf()... using s[n]printf()." | tee -a configure.log
Chris@4: 
Chris@4:   echo >> configure.log
Chris@4:   cat >$test.c <<EOF
Chris@4: #include <stdio.h>
Chris@4: int mytest()
Chris@4: {
Chris@4:   char buf[20];
Chris@4:   snprintf(buf, sizeof(buf), "%s", "foo");
Chris@4:   return 0;
Chris@4: }
Chris@4: int main()
Chris@4: {
Chris@4:   return (mytest());
Chris@4: }
Chris@4: EOF
Chris@4: 
Chris@4:   if try $CC $CFLAGS -o $test $test.c; then
Chris@4:     echo "Checking for snprintf() in stdio.h... Yes." | tee -a configure.log
Chris@4: 
Chris@4:     echo >> configure.log
Chris@4:     cat >$test.c <<EOF
Chris@4: #include <stdio.h>
Chris@4: int mytest()
Chris@4: {
Chris@4:   char buf[20];
Chris@4:   return snprintf(buf, sizeof(buf), "%s", "foo");
Chris@4: }
Chris@4: int main()
Chris@4: {
Chris@4:   return (mytest());
Chris@4: }
Chris@4: EOF
Chris@4: 
Chris@4:     if try $CC -c $CFLAGS $test.c; then
Chris@4:       echo "Checking for return value of snprintf()... Yes." | tee -a configure.log
Chris@4:     else
Chris@4:       CFLAGS="$CFLAGS -DHAS_snprintf_void"
Chris@4:       SFLAGS="$SFLAGS -DHAS_snprintf_void"
Chris@4:       echo "Checking for return value of snprintf()... No." | tee -a configure.log
Chris@4:       echo "  WARNING: apparently snprintf() does not return a value. zlib" | tee -a configure.log
Chris@4:       echo "  can build but will be open to possible string-format security" | tee -a configure.log
Chris@4:       echo "  vulnerabilities." | tee -a configure.log
Chris@4:     fi
Chris@4:   else
Chris@4:     CFLAGS="$CFLAGS -DNO_snprintf"
Chris@4:     SFLAGS="$SFLAGS -DNO_snprintf"
Chris@4:     echo "Checking for snprintf() in stdio.h... No." | tee -a configure.log
Chris@4:     echo "  WARNING: snprintf() not found, falling back to sprintf(). zlib" | tee -a configure.log
Chris@4:     echo "  can build but will be open to possible buffer-overflow security" | tee -a configure.log
Chris@4:     echo "  vulnerabilities." | tee -a configure.log
Chris@4: 
Chris@4:     echo >> configure.log
Chris@4:     cat >$test.c <<EOF
Chris@4: #include <stdio.h>
Chris@4: int mytest()
Chris@4: {
Chris@4:   char buf[20];
Chris@4:   return sprintf(buf, "%s", "foo");
Chris@4: }
Chris@4: int main()
Chris@4: {
Chris@4:   return (mytest());
Chris@4: }
Chris@4: EOF
Chris@4: 
Chris@4:     if try $CC -c $CFLAGS $test.c; then
Chris@4:       echo "Checking for return value of sprintf()... Yes." | tee -a configure.log
Chris@4:     else
Chris@4:       CFLAGS="$CFLAGS -DHAS_sprintf_void"
Chris@4:       SFLAGS="$SFLAGS -DHAS_sprintf_void"
Chris@4:       echo "Checking for return value of sprintf()... No." | tee -a configure.log
Chris@4:       echo "  WARNING: apparently sprintf() does not return a value. zlib" | tee -a configure.log
Chris@4:       echo "  can build but will be open to possible string-format security" | tee -a configure.log
Chris@4:       echo "  vulnerabilities." | tee -a configure.log
Chris@4:     fi
Chris@4:   fi
Chris@4: fi
Chris@4: 
Chris@4: # see if we can hide zlib internal symbols that are linked between separate source files
Chris@4: if test "$gcc" -eq 1; then
Chris@4:   echo >> configure.log
Chris@4:   cat > $test.c <<EOF
Chris@4: #define ZLIB_INTERNAL __attribute__((visibility ("hidden")))
Chris@4: int ZLIB_INTERNAL foo;
Chris@4: int main()
Chris@4: {
Chris@4:   return 0;
Chris@4: }
Chris@4: EOF
Chris@4:   if tryboth $CC -c $CFLAGS $test.c; then
Chris@4:     CFLAGS="$CFLAGS -DHAVE_HIDDEN"
Chris@4:     SFLAGS="$SFLAGS -DHAVE_HIDDEN"
Chris@4:     echo "Checking for attribute(visibility) support... Yes." | tee -a configure.log
Chris@4:   else
Chris@4:     echo "Checking for attribute(visibility) support... No." | tee -a configure.log
Chris@4:   fi
Chris@4: fi
Chris@4: 
Chris@4: echo >> configure.log
Chris@4: 
Chris@4: # find a four-byte unsiged integer type for crc calculations
Chris@4: cat > $test.c <<EOF
Chris@4: #include <stdio.h>
Chris@4: #define is32(n,t) for(n=1,k=0;n;n<<=1,k++);if(k==32){puts(t);return 0;}
Chris@4: int main() {
Chris@4:     int k;
Chris@4:     unsigned i;
Chris@4:     unsigned long l;
Chris@4:     unsigned short s;
Chris@4:     is32(i, "unsigned")
Chris@4:     is32(l, "unsigned long")
Chris@4:     is32(s, "unsigned short")
Chris@4:     return 1;
Chris@4: }
Chris@4: EOF
Chris@4: Z_U4=""
Chris@4: if try $CC $CFLAGS $test.c -o $test && Z_U4=`./$test` && test -n "$Z_U4"; then
Chris@4:   sed < zconf.h "/#define Z_U4/s/\/\* \.\/configure may/#define Z_U4 $Z_U4   \/* .\/configure put the/" > zconf.temp.h
Chris@4:   mv zconf.temp.h zconf.h
Chris@4:   echo "Looking for a four-byte integer type... Found." | tee -a configure.log
Chris@4: else
Chris@4:   echo "Looking for a four-byte integer type... Not found." | tee -a configure.log
Chris@4: fi
Chris@4: 
Chris@4: # clean up files produced by running the compiler and linker
Chris@4: rm -f $test.[co] $test $test$shared_ext $test.gcno
Chris@4: 
Chris@4: # show the results in the log
Chris@4: echo >> configure.log
Chris@4: echo ALL = $ALL >> configure.log
Chris@4: echo AR = $AR >> configure.log
Chris@4: echo ARFLAGS = $ARFLAGS >> configure.log
Chris@4: echo CC = $CC >> configure.log
Chris@4: echo CFLAGS = $CFLAGS >> configure.log
Chris@4: echo CPP = $CPP >> configure.log
Chris@4: echo EXE = $EXE >> configure.log
Chris@4: echo LDCONFIG = $LDCONFIG >> configure.log
Chris@4: echo LDFLAGS = $LDFLAGS >> configure.log
Chris@4: echo LDSHARED = $LDSHARED >> configure.log
Chris@4: echo LDSHAREDLIBC = $LDSHAREDLIBC >> configure.log
Chris@4: echo OBJC = $OBJC >> configure.log
Chris@4: echo PIC_OBJC = $PIC_OBJC >> configure.log
Chris@4: echo RANLIB = $RANLIB >> configure.log
Chris@4: echo SFLAGS = $SFLAGS >> configure.log
Chris@4: echo SHAREDLIB = $SHAREDLIB >> configure.log
Chris@4: echo SHAREDLIBM = $SHAREDLIBM >> configure.log
Chris@4: echo SHAREDLIBV = $SHAREDLIBV >> configure.log
Chris@4: echo STATICLIB = $STATICLIB >> configure.log
Chris@4: echo TEST = $TEST >> configure.log
Chris@4: echo VER = $VER >> configure.log
Chris@4: echo Z_U4 = $Z_U4 >> configure.log
Chris@4: echo exec_prefix = $exec_prefix >> configure.log
Chris@4: echo includedir = $includedir >> configure.log
Chris@4: echo libdir = $libdir >> configure.log
Chris@4: echo mandir = $mandir >> configure.log
Chris@4: echo prefix = $prefix >> configure.log
Chris@4: echo sharedlibdir = $sharedlibdir >> configure.log
Chris@4: echo uname = $uname >> configure.log
Chris@4: echo -------------------- >> configure.log
Chris@4: echo >> configure.log
Chris@4: echo >> configure.log
Chris@4: 
Chris@4: # udpate Makefile with the configure results
Chris@4: sed < Makefile.in "
Chris@4: /^CC *=/s#=.*#=$CC#
Chris@4: /^CFLAGS *=/s#=.*#=$CFLAGS#
Chris@4: /^SFLAGS *=/s#=.*#=$SFLAGS#
Chris@4: /^LDFLAGS *=/s#=.*#=$LDFLAGS#
Chris@4: /^LDSHARED *=/s#=.*#=$LDSHARED#
Chris@4: /^CPP *=/s#=.*#=$CPP#
Chris@4: /^STATICLIB *=/s#=.*#=$STATICLIB#
Chris@4: /^SHAREDLIB *=/s#=.*#=$SHAREDLIB#
Chris@4: /^SHAREDLIBV *=/s#=.*#=$SHAREDLIBV#
Chris@4: /^SHAREDLIBM *=/s#=.*#=$SHAREDLIBM#
Chris@4: /^AR *=/s#=.*#=$AR#
Chris@4: /^ARFLAGS *=/s#=.*#=$ARFLAGS#
Chris@4: /^RANLIB *=/s#=.*#=$RANLIB#
Chris@4: /^LDCONFIG *=/s#=.*#=$LDCONFIG#
Chris@4: /^LDSHAREDLIBC *=/s#=.*#=$LDSHAREDLIBC#
Chris@4: /^EXE *=/s#=.*#=$EXE#
Chris@4: /^prefix *=/s#=.*#=$prefix#
Chris@4: /^exec_prefix *=/s#=.*#=$exec_prefix#
Chris@4: /^libdir *=/s#=.*#=$libdir#
Chris@4: /^sharedlibdir *=/s#=.*#=$sharedlibdir#
Chris@4: /^includedir *=/s#=.*#=$includedir#
Chris@4: /^mandir *=/s#=.*#=$mandir#
Chris@4: /^OBJC *=/s#=.*#= $OBJC#
Chris@4: /^PIC_OBJC *=/s#=.*#= $PIC_OBJC#
Chris@4: /^all: */s#:.*#: $ALL#
Chris@4: /^test: */s#:.*#: $TEST#
Chris@4: " > Makefile
Chris@4: 
Chris@4: # create zlib.pc with the configure results
Chris@4: sed < zlib.pc.in "
Chris@4: /^CC *=/s#=.*#=$CC#
Chris@4: /^CFLAGS *=/s#=.*#=$CFLAGS#
Chris@4: /^CPP *=/s#=.*#=$CPP#
Chris@4: /^LDSHARED *=/s#=.*#=$LDSHARED#
Chris@4: /^STATICLIB *=/s#=.*#=$STATICLIB#
Chris@4: /^SHAREDLIB *=/s#=.*#=$SHAREDLIB#
Chris@4: /^SHAREDLIBV *=/s#=.*#=$SHAREDLIBV#
Chris@4: /^SHAREDLIBM *=/s#=.*#=$SHAREDLIBM#
Chris@4: /^AR *=/s#=.*#=$AR#
Chris@4: /^ARFLAGS *=/s#=.*#=$ARFLAGS#
Chris@4: /^RANLIB *=/s#=.*#=$RANLIB#
Chris@4: /^EXE *=/s#=.*#=$EXE#
Chris@4: /^prefix *=/s#=.*#=$prefix#
Chris@4: /^exec_prefix *=/s#=.*#=$exec_prefix#
Chris@4: /^libdir *=/s#=.*#=$libdir#
Chris@4: /^sharedlibdir *=/s#=.*#=$sharedlibdir#
Chris@4: /^includedir *=/s#=.*#=$includedir#
Chris@4: /^mandir *=/s#=.*#=$mandir#
Chris@4: /^LDFLAGS *=/s#=.*#=$LDFLAGS#
Chris@4: " | sed -e "
Chris@4: s/\@VERSION\@/$VER/g;
Chris@4: " > zlib.pc