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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