dnl jpegoptim
dnl
dnl Process this file with autoconf to produce a configure script.
AC_INIT
AC_CONFIG_SRCDIR([jpegoptim.c])
AC_CONFIG_HEADER(config.h)
AC_CONFIG_AUX_DIR(tools)


AC_CANONICAL_HOST
HOST_TYPE=$host
AC_DEFINE_UNQUOTED(HOST_TYPE,"$host")

dnl Checks for programs.
AC_PROG_CC
AC_PROG_INSTALL
AC_PROG_MAKE_SET


AC_ARG_WITH(libjpeg, [  --with-libjpeg=DIR	  libjpeg is installed in ],
	[if test $withval != yes; then
	   	jpeginfo_cv_libjpeg=$withval
	fi
	if test -d "${jpeginfo_cv_libjpeg}/lib"; then
		LDFLAGS="-L${jpeginfo_cv_libjpeg}/lib $LDFLAGS"
		CPPFLAGS="$CPPFLAGS -I${jpeginfo_cv_libjpeg}/include"
	else
		LDFLAGS="-L${jpeginfo_cv_libjpeg} $LDFLAGS"
		CPPFLAGS="$CPPFLAGS -I${jpeginfo_cv_libjpeg}"
	fi])

arith_code=0
AC_ARG_WITH(arith, [  --with-arith		  Enable arithmetic coding support ],
	[
	if test $withval == yes; then
	   arith_code=1
	fi
	])


dnl Checks for libraries.

AC_CHECK_LIB(jpeg, jpeg_read_header, ,[
echo "Cannot find libjpeg or you have too old version (v6 or later required)."
exit 1
])

dnl AC_CHECK_LIB(m, round)
AC_CHECK_LIB(m, floor)

dnl Checks for header files.

AC_HEADER_STDC
AC_CHECK_HEADERS(unistd.h getopt.h string.h libgen.h math.h fcntl.h sys/wait.h)
AC_CHECK_HEADERS(jpeglib.h,,[
echo "Cannot find jpeglib.h  You need libjpeg v6 (or later)."
exit 1
])


dnl Checks for typedefs, structures, and compiler characteristics.

AC_CHECK_SIZEOF(long)
AC_CHECK_SIZEOF(int)



dnl Checks for library functions.
AC_CHECK_FUNCS(getopt_long, break, [GNUGETOPT="getopt.o getopt1.o"])
AC_SUBST(GNUGETOPT)

AC_CHECK_FUNCS(mkstemps)
AC_CHECK_FUNCS(labs)
AC_CHECK_FUNCS(fileno)
AC_CHECK_FUNCS(utimensat)
AC_CHECK_FUNCS(fork)
AC_CHECK_FUNCS(wait)

AC_CHECK_MEMBERS([struct stat.st_mtim])

dnl own tests

AC_MSG_CHECKING([for broken jmorecfg.h (METHODDEF)])
AC_CACHE_VAL(jpeginfo_cv_broken_methoddef,
[AC_RUN_IFELSE([AC_LANG_SOURCE([[
#include <stdio.h>
#include <jpeglib.h>
METHODDEF(void) foo(void) { };
int main(void)
{
  return 0;
}]])],[jpeginfo_cv_broken_methoddef=no],[jpeginfo_cv_broken_methoddef=yes],[jpeginfo_cv_broken_methoddef=no])])
if test $jpeginfo_cv_broken_methoddef = yes; then
  AC_DEFINE(BROKEN_METHODDEF)
fi
AC_MSG_RESULT($jpeginfo_cv_broken_methoddef)

AC_MSG_CHECKING([Arithmetic Coding support in JPEG library])
AC_CACHE_VAL(jpegoptim_cv_arith_code_support,
[AC_RUN_IFELSE([AC_LANG_SOURCE([[
#include <stdio.h>
#include <jpeglib.h>
int main(void)
{
	struct jpeg_compress_struct cinfo;
	cinfo.arith_code=TRUE;
	return 0;
}
]])],[jpegoptim_cv_arith_code_support=yes],[jpegoptim_cv_arith_code_support=no],[jpegoptim_cv_arith_code_support=no])])
if test $arith_code == 1 -a $jpegoptim_cv_arith_code_support = yes; then
  arith_code_status="Enabled"
  AC_DEFINE(HAVE_ARITH_CODE)
else
  arith_code_status="Disabled"
fi
AC_MSG_RESULT($jpegoptim_cv_arith_code_support)


AC_MSG_CHECKING([Extension settings in JPEG library])
AC_CACHE_VAL(jpegoptim_cv_extension_settings,
[AC_RUN_IFELSE([AC_LANG_SOURCE([[
#include <stdio.h>
#include <jpeglib.h>
int main(void)
{
	struct jpeg_compress_struct cinfo;
	if (jpeg_c_int_param_supported(&cinfo, JINT_DC_SCAN_OPT_MODE))
		jpeg_c_set_int_param(&cinfo, JINT_DC_SCAN_OPT_MODE, 1);
	return 0;
}
]])],[jpegoptim_cv_extension_settings=yes],[jpegoptim_cv_extension_settings=no],[jpegoptim_cv_extension_settings=no])])
if test $jpegoptim_cv_extension_settings = yes; then
  extension_settings_status="Present"
  AC_DEFINE(HAVE_JINT_DC_SCAN_OPT_MODE)
else
  extension_settings_status="Absent"
fi
AC_MSG_RESULT($jpegoptim_cv_extension_settings)


echo "--------------------------------------------------"
echo "Extension settings: $extension_settings_status"
echo "Arithmetic coding: $arith_code_status"
if test $arith_code == 0 -a "$jpegoptim_cv_arith_code_support" == "yes"; then
   echo "(use --with-arith to enable Arithmetic coding support)"
fi
echo "--------------------------------------------------"


AC_CONFIG_FILES([Makefile])
AC_OUTPUT