dnl Process this file with autoconf to produce a configure script.

# get rid of that stupid cache mechanism
rm -f config.cache

AC_INIT(configure.in)
AC_CANONICAL_BUILD
AC_CANONICAL_HOST
AC_ISC_POSIX
AM_INIT_AUTOMAKE(eet, 0.9.10.026)
AM_CONFIG_HEADER(config.h)

AC_PROG_CC
AM_PROG_CC_STDC
AC_HEADER_STDC
AC_C_CONST
AM_ENABLE_SHARED
AM_PROG_LIBTOOL
AC_FUNC_ALLOCA

AC_CHECK_HEADER(zlib.h,, AC_MSG_ERROR("Cannot find zlib.h. Make sure your CFLAGS environment variable contains include lines for the location of this file"))
AC_CHECK_HEADER(jpeglib.h,, AC_MSG_ERROR("Cannot find jpeglib.h. Make sure your CFLAGS environment variable contains include lines for the location of this file"))

AC_CHECK_HEADERS(netinet/in.h)

case "$host_os" in
	mingw|mingw32)
		winsock_libs="-lwsock32"
		;;
esac

AC_SUBST(winsock_libs)

AC_CHECK_HEADER(fnmatch.h,, AC_MSG_ERROR([Cannot find fnmatch.h. Make sure your CFLAGS environment variable contains include lines for the location of this file]))

AC_CHECK_FUNCS(fnmatch, res=yes, res=no)
if test "x$res" = "xno"; then
	AC_CHECK_LIB(fnmatch, fnmatch, res=yes, res=no)
	if test "x$res" = "xno"; then
		AC_MSG_ERROR([Cannot find fnmatch() in neither libc nor libfnmatch])
	else
		fnmatch_libs="-lfnmatch"
	fi
fi

AC_SUBST(fnmatch_libs)

dnl These are needed for fmemopen/open_memstream
AC_DEFINE(_GNU_SOURCE, , [Enable GNU extensions])
AC_DEFINE(__USE_GNU, , [Enable GNU extensions])

AC_CHECK_FUNCS(fmemopen open_memstream realpath)

dnl Check whether the null pointer is zero on this arch
AC_MSG_CHECKING([value of the null pointer])
AC_TRY_RUN([
#include <stdlib.h>
int main (int argc, char **argv) {
  void *foo = NULL;
  int bar = (int)foo;
  return (int)foo;
}
], AC_MSG_RESULT([yes]), [
	AC_MSG_RESULT([no])
	AC_MSG_WARN([Your system is a bit too funny, eet might not work properly])
], AC_MSG_WARN([Cannot check when cross-compiling -- assuming null is okay])
)

AC_MSG_CHECKING([OS libc C99 '%a' support])
AC_TRY_RUN([
#include <stdio.h>
int main(int argc, char **argv) {
  char buf[4096];
  float ival = 0.1234, oval = 0.0;
  snprintf(buf, sizeof(buf), "%a", (double)ival);
  sscanf(buf, "%a", &oval);
  if (ival != oval) return -1;
  return 0;
}
], AC_MSG_RESULT([yes]), [
	AC_MSG_RESULT([no])
	AC_MSG_ERROR([Unsupported Operating System!
Your OS does not support C99's '%a' string format. Eet cannot function without
it. Please contact your OS vendor to get updates for C99 '%a' floating point
format read/write support or change operating systems for one with support
for an already very old standard. (Linux is known to support this, as is
Solaris 10)])
], AC_MSG_WARN([Cannot check when cross-compiling -- assuming C99 '%a' support is OK])
)

if test "x${bindir}" = 'x${exec_prefix}/bin'; then
  if test "x${exec_prefix}" = "xNONE"; then
    if test "x${prefix}" = "xNONE"; then
      bindir="${ac_default_prefix}/bin";
    else
      bindir="${prefix}/bin";
    fi
  else
    if test "x${prefix}" = "xNONE"; then
      bindir="${ac_default_prefix}/bin";
    else
      bindir="${prefix}/bin";
    fi
  fi
fi

if test "x${libdir}" = 'x${exec_prefix}/lib'; then
  if test "x${exec_prefix}" = "xNONE"; then
    if test "x${prefix}" = "xNONE"; then
      libdir="${ac_default_prefix}/lib";
    else
      libdir="${prefix}/lib";
    fi
  else
    if test "x${prefix}" = "xNONE"; then
      libdir="${ac_default_prefix}/lib";
    else
      libdir="${prefix}/lib";
    fi
  fi
fi

dnl Set PACKAGE_BIN_DIR in config.h.
if test "x${bindir}" = 'xNONE'; then
  if test "x${prefix}" = "xNONE"; then
    AC_DEFINE_UNQUOTED(PACKAGE_BIN_DIR, "${ac_default_prefix}/bin", [Installation directory for user executables])
  else
    AC_DEFINE_UNQUOTED(PACKAGE_BIN_DIR, "${prefix}/bin", [Installation directory for user executables])
  fi
else
  AC_DEFINE_UNQUOTED(PACKAGE_BIN_DIR, "${bindir}", [Installation directory for user executables])
fi

dnl Set PACKAGE_LIB_DIR in config.h.
if test "x${libdir}" = 'xNONE'; then
  if test "x${prefix}" = "xNONE"; then
    AC_DEFINE_UNQUOTED(PACKAGE_LIB_DIR, "${ac_default_prefix}/lib", [Installation directory for libraries] )
  else
    AC_DEFINE_UNQUOTED(PACKAGE_LIB_DIR, "${prefix}/lib", [Installation directory for libraries])
  fi
else
  AC_DEFINE_UNQUOTED(PACKAGE_LIB_DIR, "${libdir}", [Installation directory for libraries])
fi

dnl Set PACKAGE_SOURCE_DIR in config.h.
packagesrcdir=`cd $srcdir && pwd`
AC_DEFINE_UNQUOTED(PACKAGE_SOURCE_DIR, "${packagesrcdir}", [Source code directory])

#dnl Documentation
#AM_CHECK_DOXYGEN()

AC_OUTPUT([
Makefile
eet.pc
eet.c
src/Makefile
src/lib/Makefile
src/bin/Makefile
eet-config
README
eet.spec
eet.oe
eet-native.oe
eet.bb
eetXnative.bb
debian/changelog
],[
chmod +x eet-config
])


#####################################################################
## Info

echo
echo
echo
echo "------------------------------------------------------------------------"
echo "$PACKAGE $VERSION"
echo "------------------------------------------------------------------------"
echo
echo "Configuration Options Summary:"
echo
#echo "  Build documentation..: $BUILD_DOCS"
#echo
echo "  Compilation..........: make"
echo
echo "  Installation.........: make install"
echo
echo "    prefix.........: $prefix"
echo "    binaries.......: $bindir"
echo "    libraries......: $libdir"
echo "    headers........: $includedir"
#echo "    documentation..: $datadir/$PACKAGE/doc"
echo