cannam@89: #!/bin/sh
cannam@89: # configure script for zlib.
cannam@89: #
cannam@89: # Normally configure builds both a static and a shared library.
cannam@89: # If you want to build just a static library, use: ./configure --static
cannam@89: #
cannam@89: # To impose specific compiler or flags or install directory, use for example:
cannam@89: #    prefix=$HOME CC=cc CFLAGS="-O4" ./configure
cannam@89: # or for csh/tcsh users:
cannam@89: #    (setenv prefix $HOME; setenv CC cc; setenv CFLAGS "-O4"; ./configure)
cannam@89: 
cannam@89: # Incorrect settings of CC or CFLAGS may prevent creating a shared library.
cannam@89: # If you have problems, try without defining CC and CFLAGS before reporting
cannam@89: # an error.
cannam@89: 
cannam@89: # start off configure.log
cannam@89: echo -------------------- >> configure.log
cannam@89: echo $0 $* >> configure.log
cannam@89: date >> configure.log
cannam@89: 
cannam@89: # set command prefix for cross-compilation
cannam@89: if [ -n "${CHOST}" ]; then
cannam@89:     uname="`echo "${CHOST}" | sed -e 's/^[^-]*-\([^-]*\)$/\1/' -e 's/^[^-]*-[^-]*-\([^-]*\)$/\1/' -e 's/^[^-]*-[^-]*-\([^-]*\)-.*$/\1/'`"
cannam@89:     CROSS_PREFIX="${CHOST}-"
cannam@89: fi
cannam@89: 
cannam@89: # destination name for static library
cannam@89: STATICLIB=libz.a
cannam@89: 
cannam@89: # extract zlib version numbers from zlib.h
cannam@89: VER=`sed -n -e '/VERSION "/s/.*"\(.*\)".*/\1/p' < zlib.h`
cannam@89: VER3=`sed -n -e '/VERSION "/s/.*"\([0-9]*\\.[0-9]*\\.[0-9]*\).*/\1/p' < zlib.h`
cannam@89: VER2=`sed -n -e '/VERSION "/s/.*"\([0-9]*\\.[0-9]*\)\\..*/\1/p' < zlib.h`
cannam@89: VER1=`sed -n -e '/VERSION "/s/.*"\([0-9]*\)\\..*/\1/p' < zlib.h`
cannam@89: 
cannam@89: # establish commands for library building
cannam@89: if "${CROSS_PREFIX}ar" --version >/dev/null 2>/dev/null || test $? -lt 126; then
cannam@89:     AR=${AR-"${CROSS_PREFIX}ar"}
cannam@89:     test -n "${CROSS_PREFIX}" && echo Using ${AR} | tee -a configure.log
cannam@89: else
cannam@89:     AR=${AR-"ar"}
cannam@89:     test -n "${CROSS_PREFIX}" && echo Using ${AR} | tee -a configure.log
cannam@89: fi
cannam@89: ARFLAGS=${ARFLAGS-"rc"}
cannam@89: if "${CROSS_PREFIX}ranlib" --version >/dev/null 2>/dev/null || test $? -lt 126; then
cannam@89:     RANLIB=${RANLIB-"${CROSS_PREFIX}ranlib"}
cannam@89:     test -n "${CROSS_PREFIX}" && echo Using ${RANLIB} | tee -a configure.log
cannam@89: else
cannam@89:     RANLIB=${RANLIB-"ranlib"}
cannam@89: fi
cannam@89: if "${CROSS_PREFIX}nm" --version >/dev/null 2>/dev/null || test $? -lt 126; then
cannam@89:     NM=${NM-"${CROSS_PREFIX}nm"}
cannam@89:     test -n "${CROSS_PREFIX}" && echo Using ${NM} | tee -a configure.log
cannam@89: else
cannam@89:     NM=${NM-"nm"}
cannam@89: fi
cannam@89: 
cannam@89: # set defaults before processing command line options
cannam@89: LDCONFIG=${LDCONFIG-"ldconfig"}
cannam@89: LDSHAREDLIBC="${LDSHAREDLIBC--lc}"
cannam@89: ARCHS=
cannam@89: prefix=${prefix-/usr/local}
cannam@89: exec_prefix=${exec_prefix-'${prefix}'}
cannam@89: libdir=${libdir-'${exec_prefix}/lib'}
cannam@89: sharedlibdir=${sharedlibdir-'${libdir}'}
cannam@89: includedir=${includedir-'${prefix}/include'}
cannam@89: mandir=${mandir-'${prefix}/share/man'}
cannam@89: shared_ext='.so'
cannam@89: shared=1
cannam@89: solo=0
cannam@89: cover=0
cannam@89: zprefix=0
cannam@89: build64=0
cannam@89: gcc=0
cannam@89: old_cc="$CC"
cannam@89: old_cflags="$CFLAGS"
cannam@89: OBJC='$(OBJZ) $(OBJG)'
cannam@89: PIC_OBJC='$(PIC_OBJZ) $(PIC_OBJG)'
cannam@89: 
cannam@89: # process command line options
cannam@89: while test $# -ge 1
cannam@89: do
cannam@89: case "$1" in
cannam@89:     -h* | --help)
cannam@89:       echo 'usage:' | tee -a configure.log
cannam@89:       echo '  configure [--zprefix] [--prefix=PREFIX]  [--eprefix=EXPREFIX]' | tee -a configure.log
cannam@89:       echo '    [--static] [--64] [--libdir=LIBDIR] [--sharedlibdir=LIBDIR]' | tee -a configure.log
cannam@89:       echo '    [--includedir=INCLUDEDIR] [--archs="-arch i386 -arch x86_64"]' | tee -a configure.log
cannam@89:         exit 0 ;;
cannam@89:     -p*=* | --prefix=*) prefix=`echo $1 | sed 's/.*=//'`; shift ;;
cannam@89:     -e*=* | --eprefix=*) exec_prefix=`echo $1 | sed 's/.*=//'`; shift ;;
cannam@89:     -l*=* | --libdir=*) libdir=`echo $1 | sed 's/.*=//'`; shift ;;
cannam@89:     --sharedlibdir=*) sharedlibdir=`echo $1 | sed 's/.*=//'`; shift ;;
cannam@89:     -i*=* | --includedir=*) includedir=`echo $1 | sed 's/.*=//'`;shift ;;
cannam@89:     -u*=* | --uname=*) uname=`echo $1 | sed 's/.*=//'`;shift ;;
cannam@89:     -p* | --prefix) prefix="$2"; shift; shift ;;
cannam@89:     -e* | --eprefix) exec_prefix="$2"; shift; shift ;;
cannam@89:     -l* | --libdir) libdir="$2"; shift; shift ;;
cannam@89:     -i* | --includedir) includedir="$2"; shift; shift ;;
cannam@89:     -s* | --shared | --enable-shared) shared=1; shift ;;
cannam@89:     -t | --static) shared=0; shift ;;
cannam@89:     --solo) solo=1; shift ;;
cannam@89:     --cover) cover=1; shift ;;
cannam@89:     -z* | --zprefix) zprefix=1; shift ;;
cannam@89:     -6* | --64) build64=1; shift ;;
cannam@89:     -a*=* | --archs=*) ARCHS=`echo $1 | sed 's/.*=//'`; shift ;;
cannam@89:     --sysconfdir=*) echo "ignored option: --sysconfdir" | tee -a configure.log; shift ;;
cannam@89:     --localstatedir=*) echo "ignored option: --localstatedir" | tee -a configure.log; shift ;;
cannam@89:     *) echo "unknown option: $1"; echo "$0 --help for help" | tee -a configure.log; exit 1 ;;
cannam@89:     esac
cannam@89: done
cannam@89: 
cannam@89: # define functions for testing compiler and library characteristics and logging the results
cannam@89: test=ztest$$
cannam@89: 
cannam@89: show()
cannam@89: {
cannam@89:   case "$*" in
cannam@89:     *$test.c*)
cannam@89:       echo === $test.c === >> configure.log
cannam@89:       cat $test.c >> configure.log
cannam@89:       echo === >> configure.log;;
cannam@89:   esac
cannam@89:   echo $* >> configure.log
cannam@89: }
cannam@89: 
cannam@89: cat > $test.c <<EOF
cannam@89: #error error
cannam@89: EOF
cannam@89: if ($CC -c $CFLAGS $test.c) 2>/dev/null; then
cannam@89:   try()
cannam@89:   {
cannam@89:     show $*
cannam@89:     test "`( $* ) 2>&1 | tee -a configure.log`" = ""
cannam@89:   }
cannam@89:   echo - using any output from compiler to indicate an error >> configure.log
cannam@89: else
cannam@89:   try()
cannam@89:   {
cannam@89:     show $*
cannam@89:     ( $* ) >> configure.log 2>&1
cannam@89:     ret=$?
cannam@89:     if test $ret -ne 0; then
cannam@89:       echo "(exit code "$ret")" >> configure.log
cannam@89:     fi
cannam@89:     return $ret
cannam@89:   }
cannam@89: fi
cannam@89: 
cannam@89: tryboth()
cannam@89: {
cannam@89:   show $*
cannam@89:   got=`( $* ) 2>&1`
cannam@89:   ret=$?
cannam@89:   printf %s "$got" >> configure.log
cannam@89:   if test $ret -ne 0; then
cannam@89:     return $ret
cannam@89:   fi
cannam@89:   test "$got" = ""
cannam@89: }
cannam@89: 
cannam@89: echo >> configure.log
cannam@89: 
cannam@89: # check for gcc vs. cc and set compile and link flags based on the system identified by uname
cannam@89: cat > $test.c <<EOF
cannam@89: extern int getchar();
cannam@89: int hello() {return getchar();}
cannam@89: EOF
cannam@89: 
cannam@89: test -z "$CC" && echo Checking for ${CROSS_PREFIX}gcc... | tee -a configure.log
cannam@89: cc=${CC-${CROSS_PREFIX}gcc}
cannam@89: cflags=${CFLAGS-"-O3"}
cannam@89: # to force the asm version use: CFLAGS="-O3 -DASMV" ./configure
cannam@89: case "$cc" in
cannam@89:   *gcc*) gcc=1 ;;
cannam@89:   *clang*) gcc=1 ;;
cannam@89: esac
cannam@89: case `$cc -v 2>&1` in
cannam@89:   *gcc*) gcc=1 ;;
cannam@89: esac
cannam@89: 
cannam@89: show $cc -c $cflags $test.c
cannam@89: if test "$gcc" -eq 1 && ($cc -c $cflags $test.c) >> configure.log 2>&1; then
cannam@89:   echo ... using gcc >> configure.log
cannam@89:   CC="$cc"
cannam@89:   CFLAGS="${CFLAGS--O3} ${ARCHS}"
cannam@89:   SFLAGS="${CFLAGS--O3} -fPIC"
cannam@89:   LDFLAGS="${LDFLAGS} ${ARCHS}"
cannam@89:   if test $build64 -eq 1; then
cannam@89:     CFLAGS="${CFLAGS} -m64"
cannam@89:     SFLAGS="${SFLAGS} -m64"
cannam@89:   fi
cannam@89:   if test "${ZLIBGCCWARN}" = "YES"; then
cannam@89:     CFLAGS="${CFLAGS} -Wall -Wextra -pedantic"
cannam@89:   fi
cannam@89:   if test -z "$uname"; then
cannam@89:     uname=`(uname -s || echo unknown) 2>/dev/null`
cannam@89:   fi
cannam@89:   case "$uname" in
cannam@89:   Linux* | linux* | GNU | GNU/* | solaris*)
cannam@89:         LDSHARED=${LDSHARED-"$cc -shared -Wl,-soname,libz.so.1,--version-script,zlib.map"} ;;
cannam@89:   *BSD | *bsd* | DragonFly)
cannam@89:         LDSHARED=${LDSHARED-"$cc -shared -Wl,-soname,libz.so.1,--version-script,zlib.map"}
cannam@89:         LDCONFIG="ldconfig -m" ;;
cannam@89:   CYGWIN* | Cygwin* | cygwin* | OS/2*)
cannam@89:         EXE='.exe' ;;
cannam@89:   MINGW* | mingw*)
cannam@89: # temporary bypass
cannam@89:         rm -f $test.[co] $test $test$shared_ext
cannam@89:         echo "Please use win32/Makefile.gcc instead." | tee -a configure.log
cannam@89:         exit 1
cannam@89:         LDSHARED=${LDSHARED-"$cc -shared"}
cannam@89:         LDSHAREDLIBC=""
cannam@89:         EXE='.exe' ;;
cannam@89:   QNX*)  # This is for QNX6. I suppose that the QNX rule below is for QNX2,QNX4
cannam@89:          # (alain.bonnefoy@icbt.com)
cannam@89:                  LDSHARED=${LDSHARED-"$cc -shared -Wl,-hlibz.so.1"} ;;
cannam@89:   HP-UX*)
cannam@89:          LDSHARED=${LDSHARED-"$cc -shared $SFLAGS"}
cannam@89:          case `(uname -m || echo unknown) 2>/dev/null` in
cannam@89:          ia64)
cannam@89:                  shared_ext='.so'
cannam@89:                  SHAREDLIB='libz.so' ;;
cannam@89:          *)
cannam@89:                  shared_ext='.sl'
cannam@89:                  SHAREDLIB='libz.sl' ;;
cannam@89:          esac ;;
cannam@89:   Darwin* | darwin*)
cannam@89:              shared_ext='.dylib'
cannam@89:              SHAREDLIB=libz$shared_ext
cannam@89:              SHAREDLIBV=libz.$VER$shared_ext
cannam@89:              SHAREDLIBM=libz.$VER1$shared_ext
cannam@89:              LDSHARED=${LDSHARED-"$cc -dynamiclib -install_name $libdir/$SHAREDLIBM -compatibility_version $VER1 -current_version $VER3"}
cannam@89:              AR="/usr/bin/libtool"
cannam@89:              ARFLAGS="-o" ;;
cannam@89:   *)             LDSHARED=${LDSHARED-"$cc -shared"} ;;
cannam@89:   esac
cannam@89: else
cannam@89:   # find system name and corresponding cc options
cannam@89:   CC=${CC-cc}
cannam@89:   gcc=0
cannam@89:   echo ... using $CC >> configure.log
cannam@89:   if test -z "$uname"; then
cannam@89:     uname=`(uname -sr || echo unknown) 2>/dev/null`
cannam@89:   fi
cannam@89:   case "$uname" in
cannam@89:   HP-UX*)    SFLAGS=${CFLAGS-"-O +z"}
cannam@89:              CFLAGS=${CFLAGS-"-O"}
cannam@89: #            LDSHARED=${LDSHARED-"ld -b +vnocompatwarnings"}
cannam@89:              LDSHARED=${LDSHARED-"ld -b"}
cannam@89:          case `(uname -m || echo unknown) 2>/dev/null` in
cannam@89:          ia64)
cannam@89:              shared_ext='.so'
cannam@89:              SHAREDLIB='libz.so' ;;
cannam@89:          *)
cannam@89:              shared_ext='.sl'
cannam@89:              SHAREDLIB='libz.sl' ;;
cannam@89:          esac ;;
cannam@89:   IRIX*)     SFLAGS=${CFLAGS-"-ansi -O2 -rpath ."}
cannam@89:              CFLAGS=${CFLAGS-"-ansi -O2"}
cannam@89:              LDSHARED=${LDSHARED-"cc -shared -Wl,-soname,libz.so.1"} ;;
cannam@89:   OSF1\ V4*) SFLAGS=${CFLAGS-"-O -std1"}
cannam@89:              CFLAGS=${CFLAGS-"-O -std1"}
cannam@89:              LDFLAGS="${LDFLAGS} -Wl,-rpath,."
cannam@89:              LDSHARED=${LDSHARED-"cc -shared  -Wl,-soname,libz.so -Wl,-msym -Wl,-rpath,$(libdir) -Wl,-set_version,${VER}:1.0"} ;;
cannam@89:   OSF1*)     SFLAGS=${CFLAGS-"-O -std1"}
cannam@89:              CFLAGS=${CFLAGS-"-O -std1"}
cannam@89:              LDSHARED=${LDSHARED-"cc -shared -Wl,-soname,libz.so.1"} ;;
cannam@89:   QNX*)      SFLAGS=${CFLAGS-"-4 -O"}
cannam@89:              CFLAGS=${CFLAGS-"-4 -O"}
cannam@89:              LDSHARED=${LDSHARED-"cc"}
cannam@89:              RANLIB=${RANLIB-"true"}
cannam@89:              AR="cc"
cannam@89:              ARFLAGS="-A" ;;
cannam@89:   SCO_SV\ 3.2*) SFLAGS=${CFLAGS-"-O3 -dy -KPIC "}
cannam@89:              CFLAGS=${CFLAGS-"-O3"}
cannam@89:              LDSHARED=${LDSHARED-"cc -dy -KPIC -G"} ;;
cannam@89:   SunOS\ 5* | solaris*)
cannam@89:          LDSHARED=${LDSHARED-"cc -G -h libz$shared_ext.$VER1"}
cannam@89:          SFLAGS=${CFLAGS-"-fast -KPIC"}
cannam@89:          CFLAGS=${CFLAGS-"-fast"}
cannam@89:          if test $build64 -eq 1; then
cannam@89:              # old versions of SunPRO/Workshop/Studio don't support -m64,
cannam@89:              # but newer ones do.  Check for it.
cannam@89:              flag64=`$CC -flags | egrep -- '^-m64'`
cannam@89:              if test x"$flag64" != x"" ; then
cannam@89:                  CFLAGS="${CFLAGS} -m64"
cannam@89:                  SFLAGS="${SFLAGS} -m64"
cannam@89:              else
cannam@89:                  case `(uname -m || echo unknown) 2>/dev/null` in
cannam@89:                    i86*)
cannam@89:                      SFLAGS="$SFLAGS -xarch=amd64"
cannam@89:                      CFLAGS="$CFLAGS -xarch=amd64" ;;
cannam@89:                    *)
cannam@89:                      SFLAGS="$SFLAGS -xarch=v9"
cannam@89:                      CFLAGS="$CFLAGS -xarch=v9" ;;
cannam@89:                  esac
cannam@89:              fi
cannam@89:          fi
cannam@89:          ;;
cannam@89:   SunOS\ 4*) SFLAGS=${CFLAGS-"-O2 -PIC"}
cannam@89:              CFLAGS=${CFLAGS-"-O2"}
cannam@89:              LDSHARED=${LDSHARED-"ld"} ;;
cannam@89:   SunStudio\ 9*) SFLAGS=${CFLAGS-"-fast -xcode=pic32 -xtarget=ultra3 -xarch=v9b"}
cannam@89:              CFLAGS=${CFLAGS-"-fast -xtarget=ultra3 -xarch=v9b"}
cannam@89:              LDSHARED=${LDSHARED-"cc -xarch=v9b"} ;;
cannam@89:   UNIX_System_V\ 4.2.0)
cannam@89:              SFLAGS=${CFLAGS-"-KPIC -O"}
cannam@89:              CFLAGS=${CFLAGS-"-O"}
cannam@89:              LDSHARED=${LDSHARED-"cc -G"} ;;
cannam@89:   UNIX_SV\ 4.2MP)
cannam@89:              SFLAGS=${CFLAGS-"-Kconform_pic -O"}
cannam@89:              CFLAGS=${CFLAGS-"-O"}
cannam@89:              LDSHARED=${LDSHARED-"cc -G"} ;;
cannam@89:   OpenUNIX\ 5)
cannam@89:              SFLAGS=${CFLAGS-"-KPIC -O"}
cannam@89:              CFLAGS=${CFLAGS-"-O"}
cannam@89:              LDSHARED=${LDSHARED-"cc -G"} ;;
cannam@89:   AIX*)  # Courtesy of dbakker@arrayasolutions.com
cannam@89:              SFLAGS=${CFLAGS-"-O -qmaxmem=8192"}
cannam@89:              CFLAGS=${CFLAGS-"-O -qmaxmem=8192"}
cannam@89:              LDSHARED=${LDSHARED-"xlc -G"} ;;
cannam@89:   # send working options for other systems to zlib@gzip.org
cannam@89:   *)         SFLAGS=${CFLAGS-"-O"}
cannam@89:              CFLAGS=${CFLAGS-"-O"}
cannam@89:              LDSHARED=${LDSHARED-"cc -shared"} ;;
cannam@89:   esac
cannam@89: fi
cannam@89: 
cannam@89: # destination names for shared library if not defined above
cannam@89: SHAREDLIB=${SHAREDLIB-"libz$shared_ext"}
cannam@89: SHAREDLIBV=${SHAREDLIBV-"libz$shared_ext.$VER"}
cannam@89: SHAREDLIBM=${SHAREDLIBM-"libz$shared_ext.$VER1"}
cannam@89: 
cannam@89: echo >> configure.log
cannam@89: 
cannam@89: # see if shared library build supported
cannam@89: if test $shared -eq 1; then
cannam@89:   echo Checking for shared library support... | tee -a configure.log
cannam@89:   # we must test in two steps (cc then ld), required at least on SunOS 4.x
cannam@89:   if try $CC -w -c $SFLAGS $test.c &&
cannam@89:      try $LDSHARED $SFLAGS -o $test$shared_ext $test.o; then
cannam@89:     echo Building shared library $SHAREDLIBV with $CC. | tee -a configure.log
cannam@89:   elif test -z "$old_cc" -a -z "$old_cflags"; then
cannam@89:     echo No shared library support. | tee -a configure.log
cannam@89:     shared=0;
cannam@89:   else
cannam@89:     echo 'No shared library support; try without defining CC and CFLAGS' | tee -a configure.log
cannam@89:     shared=0;
cannam@89:   fi
cannam@89: fi
cannam@89: if test $shared -eq 0; then
cannam@89:   LDSHARED="$CC"
cannam@89:   ALL="static"
cannam@89:   TEST="all teststatic"
cannam@89:   SHAREDLIB=""
cannam@89:   SHAREDLIBV=""
cannam@89:   SHAREDLIBM=""
cannam@89:   echo Building static library $STATICLIB version $VER with $CC. | tee -a configure.log
cannam@89: else
cannam@89:   ALL="static shared"
cannam@89:   TEST="all teststatic testshared"
cannam@89: fi
cannam@89: 
cannam@89: echo >> configure.log
cannam@89: 
cannam@89: # check for underscores in external names for use by assembler code
cannam@89: CPP=${CPP-"$CC -E"}
cannam@89: case $CFLAGS in
cannam@89:   *ASMV*)
cannam@89:     echo >> configure.log
cannam@89:     show "$NM $test.o | grep _hello"
cannam@89:     if test "`$NM $test.o | grep _hello | tee -a configure.log`" = ""; then
cannam@89:       CPP="$CPP -DNO_UNDERLINE"
cannam@89:       echo Checking for underline in external names... No. | tee -a configure.log
cannam@89:     else
cannam@89:       echo Checking for underline in external names... Yes. | tee -a configure.log
cannam@89:     fi ;;
cannam@89: esac
cannam@89: 
cannam@89: echo >> configure.log
cannam@89: 
cannam@89: # check for large file support, and if none, check for fseeko()
cannam@89: cat > $test.c <<EOF
cannam@89: #include <sys/types.h>
cannam@89: off64_t dummy = 0;
cannam@89: EOF
cannam@89: if try $CC -c $CFLAGS -D_LARGEFILE64_SOURCE=1 $test.c; then
cannam@89:   CFLAGS="${CFLAGS} -D_LARGEFILE64_SOURCE=1"
cannam@89:   SFLAGS="${SFLAGS} -D_LARGEFILE64_SOURCE=1"
cannam@89:   ALL="${ALL} all64"
cannam@89:   TEST="${TEST} test64"
cannam@89:   echo "Checking for off64_t... Yes." | tee -a configure.log
cannam@89:   echo "Checking for fseeko... Yes." | tee -a configure.log
cannam@89: else
cannam@89:   echo "Checking for off64_t... No." | tee -a configure.log
cannam@89:   echo >> configure.log
cannam@89:   cat > $test.c <<EOF
cannam@89: #include <stdio.h>
cannam@89: int main(void) {
cannam@89:   fseeko(NULL, 0, 0);
cannam@89:   return 0;
cannam@89: }
cannam@89: EOF
cannam@89:   if try $CC $CFLAGS -o $test $test.c; then
cannam@89:     echo "Checking for fseeko... Yes." | tee -a configure.log
cannam@89:   else
cannam@89:     CFLAGS="${CFLAGS} -DNO_FSEEKO"
cannam@89:     SFLAGS="${SFLAGS} -DNO_FSEEKO"
cannam@89:     echo "Checking for fseeko... No." | tee -a configure.log
cannam@89:   fi
cannam@89: fi
cannam@89: 
cannam@89: echo >> configure.log
cannam@89: 
cannam@89: # check for strerror() for use by gz* functions
cannam@89: cat > $test.c <<EOF
cannam@89: #include <string.h>
cannam@89: #include <errno.h>
cannam@89: int main() { return strlen(strerror(errno)); }
cannam@89: EOF
cannam@89: if try $CC $CFLAGS -o $test $test.c; then
cannam@89:   echo "Checking for strerror... Yes." | tee -a configure.log
cannam@89: else
cannam@89:   CFLAGS="${CFLAGS} -DNO_STRERROR"
cannam@89:   SFLAGS="${SFLAGS} -DNO_STRERROR"
cannam@89:   echo "Checking for strerror... No." | tee -a configure.log
cannam@89: fi
cannam@89: 
cannam@89: # copy clean zconf.h for subsequent edits
cannam@89: cp -p zconf.h.in zconf.h
cannam@89: 
cannam@89: echo >> configure.log
cannam@89: 
cannam@89: # check for unistd.h and save result in zconf.h
cannam@89: cat > $test.c <<EOF
cannam@89: #include <unistd.h>
cannam@89: int main() { return 0; }
cannam@89: EOF
cannam@89: if try $CC -c $CFLAGS $test.c; then
cannam@89:   sed < zconf.h "/^#ifdef HAVE_UNISTD_H.* may be/s/def HAVE_UNISTD_H\(.*\) may be/ 1\1 was/" > zconf.temp.h
cannam@89:   mv zconf.temp.h zconf.h
cannam@89:   echo "Checking for unistd.h... Yes." | tee -a configure.log
cannam@89: else
cannam@89:   echo "Checking for unistd.h... No." | tee -a configure.log
cannam@89: fi
cannam@89: 
cannam@89: echo >> configure.log
cannam@89: 
cannam@89: # check for stdarg.h and save result in zconf.h
cannam@89: cat > $test.c <<EOF
cannam@89: #include <stdarg.h>
cannam@89: int main() { return 0; }
cannam@89: EOF
cannam@89: if try $CC -c $CFLAGS $test.c; then
cannam@89:   sed < zconf.h "/^#ifdef HAVE_STDARG_H.* may be/s/def HAVE_STDARG_H\(.*\) may be/ 1\1 was/" > zconf.temp.h
cannam@89:   mv zconf.temp.h zconf.h
cannam@89:   echo "Checking for stdarg.h... Yes." | tee -a configure.log
cannam@89: else
cannam@89:   echo "Checking for stdarg.h... No." | tee -a configure.log
cannam@89: fi
cannam@89: 
cannam@89: # if the z_ prefix was requested, save that in zconf.h
cannam@89: if test $zprefix -eq 1; then
cannam@89:   sed < zconf.h "/#ifdef Z_PREFIX.* may be/s/def Z_PREFIX\(.*\) may be/ 1\1 was/" > zconf.temp.h
cannam@89:   mv zconf.temp.h zconf.h
cannam@89:   echo >> configure.log
cannam@89:   echo "Using z_ prefix on all symbols." | tee -a configure.log
cannam@89: fi
cannam@89: 
cannam@89: # if --solo compilation was requested, save that in zconf.h and remove gz stuff from object lists
cannam@89: if test $solo -eq 1; then
cannam@89:   sed '/#define ZCONF_H/a\
cannam@89: #define Z_SOLO
cannam@89: 
cannam@89: ' < zconf.h > zconf.temp.h
cannam@89:   mv zconf.temp.h zconf.h
cannam@89: OBJC='$(OBJZ)'
cannam@89: PIC_OBJC='$(PIC_OBJZ)'
cannam@89: fi
cannam@89: 
cannam@89: # if code coverage testing was requested, use older gcc if defined, e.g. "gcc-4.2" on Mac OS X
cannam@89: if test $cover -eq 1; then
cannam@89:   CFLAGS="${CFLAGS} -fprofile-arcs -ftest-coverage"
cannam@89:   if test -n "$GCC_CLASSIC"; then
cannam@89:     CC=$GCC_CLASSIC
cannam@89:   fi
cannam@89: fi
cannam@89: 
cannam@89: echo >> configure.log
cannam@89: 
cannam@89: # conduct a series of tests to resolve eight possible cases of using "vs" or "s" printf functions
cannam@89: # (using stdarg or not), with or without "n" (proving size of buffer), and with or without a
cannam@89: # return value.  The most secure result is vsnprintf() with a return value.  snprintf() with a
cannam@89: # return value is secure as well, but then gzprintf() will be limited to 20 arguments.
cannam@89: cat > $test.c <<EOF
cannam@89: #include <stdio.h>
cannam@89: #include <stdarg.h>
cannam@89: #include "zconf.h"
cannam@89: int main()
cannam@89: {
cannam@89: #ifndef STDC
cannam@89:   choke me
cannam@89: #endif
cannam@89:   return 0;
cannam@89: }
cannam@89: EOF
cannam@89: if try $CC -c $CFLAGS $test.c; then
cannam@89:   echo "Checking whether to use vs[n]printf() or s[n]printf()... using vs[n]printf()." | tee -a configure.log
cannam@89: 
cannam@89:   echo >> configure.log
cannam@89:   cat > $test.c <<EOF
cannam@89: #include <stdio.h>
cannam@89: #include <stdarg.h>
cannam@89: int mytest(const char *fmt, ...)
cannam@89: {
cannam@89:   char buf[20];
cannam@89:   va_list ap;
cannam@89:   va_start(ap, fmt);
cannam@89:   vsnprintf(buf, sizeof(buf), fmt, ap);
cannam@89:   va_end(ap);
cannam@89:   return 0;
cannam@89: }
cannam@89: int main()
cannam@89: {
cannam@89:   return (mytest("Hello%d\n", 1));
cannam@89: }
cannam@89: EOF
cannam@89:   if try $CC $CFLAGS -o $test $test.c; then
cannam@89:     echo "Checking for vsnprintf() in stdio.h... Yes." | tee -a configure.log
cannam@89: 
cannam@89:     echo >> configure.log
cannam@89:     cat >$test.c <<EOF
cannam@89: #include <stdio.h>
cannam@89: #include <stdarg.h>
cannam@89: int mytest(const char *fmt, ...)
cannam@89: {
cannam@89:   int n;
cannam@89:   char buf[20];
cannam@89:   va_list ap;
cannam@89:   va_start(ap, fmt);
cannam@89:   n = vsnprintf(buf, sizeof(buf), fmt, ap);
cannam@89:   va_end(ap);
cannam@89:   return n;
cannam@89: }
cannam@89: int main()
cannam@89: {
cannam@89:   return (mytest("Hello%d\n", 1));
cannam@89: }
cannam@89: EOF
cannam@89: 
cannam@89:     if try $CC -c $CFLAGS $test.c; then
cannam@89:       echo "Checking for return value of vsnprintf()... Yes." | tee -a configure.log
cannam@89:     else
cannam@89:       CFLAGS="$CFLAGS -DHAS_vsnprintf_void"
cannam@89:       SFLAGS="$SFLAGS -DHAS_vsnprintf_void"
cannam@89:       echo "Checking for return value of vsnprintf()... No." | tee -a configure.log
cannam@89:       echo "  WARNING: apparently vsnprintf() does not return a value. zlib" | tee -a configure.log
cannam@89:       echo "  can build but will be open to possible string-format security" | tee -a configure.log
cannam@89:       echo "  vulnerabilities." | tee -a configure.log
cannam@89:     fi
cannam@89:   else
cannam@89:     CFLAGS="$CFLAGS -DNO_vsnprintf"
cannam@89:     SFLAGS="$SFLAGS -DNO_vsnprintf"
cannam@89:     echo "Checking for vsnprintf() in stdio.h... No." | tee -a configure.log
cannam@89:     echo "  WARNING: vsnprintf() not found, falling back to vsprintf(). zlib" | tee -a configure.log
cannam@89:     echo "  can build but will be open to possible buffer-overflow security" | tee -a configure.log
cannam@89:     echo "  vulnerabilities." | tee -a configure.log
cannam@89: 
cannam@89:     echo >> configure.log
cannam@89:     cat >$test.c <<EOF
cannam@89: #include <stdio.h>
cannam@89: #include <stdarg.h>
cannam@89: int mytest(const char *fmt, ...)
cannam@89: {
cannam@89:   int n;
cannam@89:   char buf[20];
cannam@89:   va_list ap;
cannam@89:   va_start(ap, fmt);
cannam@89:   n = vsprintf(buf, fmt, ap);
cannam@89:   va_end(ap);
cannam@89:   return n;
cannam@89: }
cannam@89: int main()
cannam@89: {
cannam@89:   return (mytest("Hello%d\n", 1));
cannam@89: }
cannam@89: EOF
cannam@89: 
cannam@89:     if try $CC -c $CFLAGS $test.c; then
cannam@89:       echo "Checking for return value of vsprintf()... Yes." | tee -a configure.log
cannam@89:     else
cannam@89:       CFLAGS="$CFLAGS -DHAS_vsprintf_void"
cannam@89:       SFLAGS="$SFLAGS -DHAS_vsprintf_void"
cannam@89:       echo "Checking for return value of vsprintf()... No." | tee -a configure.log
cannam@89:       echo "  WARNING: apparently vsprintf() does not return a value. zlib" | tee -a configure.log
cannam@89:       echo "  can build but will be open to possible string-format security" | tee -a configure.log
cannam@89:       echo "  vulnerabilities." | tee -a configure.log
cannam@89:     fi
cannam@89:   fi
cannam@89: else
cannam@89:   echo "Checking whether to use vs[n]printf() or s[n]printf()... using s[n]printf()." | tee -a configure.log
cannam@89: 
cannam@89:   echo >> configure.log
cannam@89:   cat >$test.c <<EOF
cannam@89: #include <stdio.h>
cannam@89: int mytest()
cannam@89: {
cannam@89:   char buf[20];
cannam@89:   snprintf(buf, sizeof(buf), "%s", "foo");
cannam@89:   return 0;
cannam@89: }
cannam@89: int main()
cannam@89: {
cannam@89:   return (mytest());
cannam@89: }
cannam@89: EOF
cannam@89: 
cannam@89:   if try $CC $CFLAGS -o $test $test.c; then
cannam@89:     echo "Checking for snprintf() in stdio.h... Yes." | tee -a configure.log
cannam@89: 
cannam@89:     echo >> configure.log
cannam@89:     cat >$test.c <<EOF
cannam@89: #include <stdio.h>
cannam@89: int mytest()
cannam@89: {
cannam@89:   char buf[20];
cannam@89:   return snprintf(buf, sizeof(buf), "%s", "foo");
cannam@89: }
cannam@89: int main()
cannam@89: {
cannam@89:   return (mytest());
cannam@89: }
cannam@89: EOF
cannam@89: 
cannam@89:     if try $CC -c $CFLAGS $test.c; then
cannam@89:       echo "Checking for return value of snprintf()... Yes." | tee -a configure.log
cannam@89:     else
cannam@89:       CFLAGS="$CFLAGS -DHAS_snprintf_void"
cannam@89:       SFLAGS="$SFLAGS -DHAS_snprintf_void"
cannam@89:       echo "Checking for return value of snprintf()... No." | tee -a configure.log
cannam@89:       echo "  WARNING: apparently snprintf() does not return a value. zlib" | tee -a configure.log
cannam@89:       echo "  can build but will be open to possible string-format security" | tee -a configure.log
cannam@89:       echo "  vulnerabilities." | tee -a configure.log
cannam@89:     fi
cannam@89:   else
cannam@89:     CFLAGS="$CFLAGS -DNO_snprintf"
cannam@89:     SFLAGS="$SFLAGS -DNO_snprintf"
cannam@89:     echo "Checking for snprintf() in stdio.h... No." | tee -a configure.log
cannam@89:     echo "  WARNING: snprintf() not found, falling back to sprintf(). zlib" | tee -a configure.log
cannam@89:     echo "  can build but will be open to possible buffer-overflow security" | tee -a configure.log
cannam@89:     echo "  vulnerabilities." | tee -a configure.log
cannam@89: 
cannam@89:     echo >> configure.log
cannam@89:     cat >$test.c <<EOF
cannam@89: #include <stdio.h>
cannam@89: int mytest()
cannam@89: {
cannam@89:   char buf[20];
cannam@89:   return sprintf(buf, "%s", "foo");
cannam@89: }
cannam@89: int main()
cannam@89: {
cannam@89:   return (mytest());
cannam@89: }
cannam@89: EOF
cannam@89: 
cannam@89:     if try $CC -c $CFLAGS $test.c; then
cannam@89:       echo "Checking for return value of sprintf()... Yes." | tee -a configure.log
cannam@89:     else
cannam@89:       CFLAGS="$CFLAGS -DHAS_sprintf_void"
cannam@89:       SFLAGS="$SFLAGS -DHAS_sprintf_void"
cannam@89:       echo "Checking for return value of sprintf()... No." | tee -a configure.log
cannam@89:       echo "  WARNING: apparently sprintf() does not return a value. zlib" | tee -a configure.log
cannam@89:       echo "  can build but will be open to possible string-format security" | tee -a configure.log
cannam@89:       echo "  vulnerabilities." | tee -a configure.log
cannam@89:     fi
cannam@89:   fi
cannam@89: fi
cannam@89: 
cannam@89: # see if we can hide zlib internal symbols that are linked between separate source files
cannam@89: if test "$gcc" -eq 1; then
cannam@89:   echo >> configure.log
cannam@89:   cat > $test.c <<EOF
cannam@89: #define ZLIB_INTERNAL __attribute__((visibility ("hidden")))
cannam@89: int ZLIB_INTERNAL foo;
cannam@89: int main()
cannam@89: {
cannam@89:   return 0;
cannam@89: }
cannam@89: EOF
cannam@89:   if tryboth $CC -c $CFLAGS $test.c; then
cannam@89:     CFLAGS="$CFLAGS -DHAVE_HIDDEN"
cannam@89:     SFLAGS="$SFLAGS -DHAVE_HIDDEN"
cannam@89:     echo "Checking for attribute(visibility) support... Yes." | tee -a configure.log
cannam@89:   else
cannam@89:     echo "Checking for attribute(visibility) support... No." | tee -a configure.log
cannam@89:   fi
cannam@89: fi
cannam@89: 
cannam@89: echo >> configure.log
cannam@89: 
cannam@89: # find a four-byte unsiged integer type for crc calculations
cannam@89: cat > $test.c <<EOF
cannam@89: #include <stdio.h>
cannam@89: #define is32(n,t) for(n=1,k=0;n;n<<=1,k++);if(k==32){puts(t);return 0;}
cannam@89: int main() {
cannam@89:     int k;
cannam@89:     unsigned i;
cannam@89:     unsigned long l;
cannam@89:     unsigned short s;
cannam@89:     is32(i, "unsigned")
cannam@89:     is32(l, "unsigned long")
cannam@89:     is32(s, "unsigned short")
cannam@89:     return 1;
cannam@89: }
cannam@89: EOF
cannam@89: Z_U4=""
cannam@89: if try $CC $CFLAGS $test.c -o $test && Z_U4=`./$test` && test -n "$Z_U4"; then
cannam@89:   sed < zconf.h "/#define Z_U4/s/\/\* \.\/configure may/#define Z_U4 $Z_U4   \/* .\/configure put the/" > zconf.temp.h
cannam@89:   mv zconf.temp.h zconf.h
cannam@89:   echo "Looking for a four-byte integer type... Found." | tee -a configure.log
cannam@89: else
cannam@89:   echo "Looking for a four-byte integer type... Not found." | tee -a configure.log
cannam@89: fi
cannam@89: 
cannam@89: # clean up files produced by running the compiler and linker
cannam@89: rm -f $test.[co] $test $test$shared_ext $test.gcno
cannam@89: 
cannam@89: # show the results in the log
cannam@89: echo >> configure.log
cannam@89: echo ALL = $ALL >> configure.log
cannam@89: echo AR = $AR >> configure.log
cannam@89: echo ARFLAGS = $ARFLAGS >> configure.log
cannam@89: echo CC = $CC >> configure.log
cannam@89: echo CFLAGS = $CFLAGS >> configure.log
cannam@89: echo CPP = $CPP >> configure.log
cannam@89: echo EXE = $EXE >> configure.log
cannam@89: echo LDCONFIG = $LDCONFIG >> configure.log
cannam@89: echo LDFLAGS = $LDFLAGS >> configure.log
cannam@89: echo LDSHARED = $LDSHARED >> configure.log
cannam@89: echo LDSHAREDLIBC = $LDSHAREDLIBC >> configure.log
cannam@89: echo OBJC = $OBJC >> configure.log
cannam@89: echo PIC_OBJC = $PIC_OBJC >> configure.log
cannam@89: echo RANLIB = $RANLIB >> configure.log
cannam@89: echo SFLAGS = $SFLAGS >> configure.log
cannam@89: echo SHAREDLIB = $SHAREDLIB >> configure.log
cannam@89: echo SHAREDLIBM = $SHAREDLIBM >> configure.log
cannam@89: echo SHAREDLIBV = $SHAREDLIBV >> configure.log
cannam@89: echo STATICLIB = $STATICLIB >> configure.log
cannam@89: echo TEST = $TEST >> configure.log
cannam@89: echo VER = $VER >> configure.log
cannam@89: echo Z_U4 = $Z_U4 >> configure.log
cannam@89: echo exec_prefix = $exec_prefix >> configure.log
cannam@89: echo includedir = $includedir >> configure.log
cannam@89: echo libdir = $libdir >> configure.log
cannam@89: echo mandir = $mandir >> configure.log
cannam@89: echo prefix = $prefix >> configure.log
cannam@89: echo sharedlibdir = $sharedlibdir >> configure.log
cannam@89: echo uname = $uname >> configure.log
cannam@89: echo -------------------- >> configure.log
cannam@89: echo >> configure.log
cannam@89: echo >> configure.log
cannam@89: 
cannam@89: # udpate Makefile with the configure results
cannam@89: sed < Makefile.in "
cannam@89: /^CC *=/s#=.*#=$CC#
cannam@89: /^CFLAGS *=/s#=.*#=$CFLAGS#
cannam@89: /^SFLAGS *=/s#=.*#=$SFLAGS#
cannam@89: /^LDFLAGS *=/s#=.*#=$LDFLAGS#
cannam@89: /^LDSHARED *=/s#=.*#=$LDSHARED#
cannam@89: /^CPP *=/s#=.*#=$CPP#
cannam@89: /^STATICLIB *=/s#=.*#=$STATICLIB#
cannam@89: /^SHAREDLIB *=/s#=.*#=$SHAREDLIB#
cannam@89: /^SHAREDLIBV *=/s#=.*#=$SHAREDLIBV#
cannam@89: /^SHAREDLIBM *=/s#=.*#=$SHAREDLIBM#
cannam@89: /^AR *=/s#=.*#=$AR#
cannam@89: /^ARFLAGS *=/s#=.*#=$ARFLAGS#
cannam@89: /^RANLIB *=/s#=.*#=$RANLIB#
cannam@89: /^LDCONFIG *=/s#=.*#=$LDCONFIG#
cannam@89: /^LDSHAREDLIBC *=/s#=.*#=$LDSHAREDLIBC#
cannam@89: /^EXE *=/s#=.*#=$EXE#
cannam@89: /^prefix *=/s#=.*#=$prefix#
cannam@89: /^exec_prefix *=/s#=.*#=$exec_prefix#
cannam@89: /^libdir *=/s#=.*#=$libdir#
cannam@89: /^sharedlibdir *=/s#=.*#=$sharedlibdir#
cannam@89: /^includedir *=/s#=.*#=$includedir#
cannam@89: /^mandir *=/s#=.*#=$mandir#
cannam@89: /^OBJC *=/s#=.*#= $OBJC#
cannam@89: /^PIC_OBJC *=/s#=.*#= $PIC_OBJC#
cannam@89: /^all: */s#:.*#: $ALL#
cannam@89: /^test: */s#:.*#: $TEST#
cannam@89: " > Makefile
cannam@89: 
cannam@89: # create zlib.pc with the configure results
cannam@89: sed < zlib.pc.in "
cannam@89: /^CC *=/s#=.*#=$CC#
cannam@89: /^CFLAGS *=/s#=.*#=$CFLAGS#
cannam@89: /^CPP *=/s#=.*#=$CPP#
cannam@89: /^LDSHARED *=/s#=.*#=$LDSHARED#
cannam@89: /^STATICLIB *=/s#=.*#=$STATICLIB#
cannam@89: /^SHAREDLIB *=/s#=.*#=$SHAREDLIB#
cannam@89: /^SHAREDLIBV *=/s#=.*#=$SHAREDLIBV#
cannam@89: /^SHAREDLIBM *=/s#=.*#=$SHAREDLIBM#
cannam@89: /^AR *=/s#=.*#=$AR#
cannam@89: /^ARFLAGS *=/s#=.*#=$ARFLAGS#
cannam@89: /^RANLIB *=/s#=.*#=$RANLIB#
cannam@89: /^EXE *=/s#=.*#=$EXE#
cannam@89: /^prefix *=/s#=.*#=$prefix#
cannam@89: /^exec_prefix *=/s#=.*#=$exec_prefix#
cannam@89: /^libdir *=/s#=.*#=$libdir#
cannam@89: /^sharedlibdir *=/s#=.*#=$sharedlibdir#
cannam@89: /^includedir *=/s#=.*#=$includedir#
cannam@89: /^mandir *=/s#=.*#=$mandir#
cannam@89: /^LDFLAGS *=/s#=.*#=$LDFLAGS#
cannam@89: " | sed -e "
cannam@89: s/\@VERSION\@/$VER/g;
cannam@89: " > zlib.pc