# Process this file with autoconf to produce a configure script.
AC_PREREQ(2.57)
AC_INIT(exrtools, 0.4, http://scanline.ca/exrtools/)
AC_CONFIG_SRCDIR([src/exrnormalize.c])
AM_INIT_AUTOMAKE(exrtools,0.4)
AM_CONFIG_HEADER([config.h])
AM_MAINTAINER_MODE
AC_CANONICAL_HOST
if test x"$host_alias" = x""; then host_alias="$host"; fi

# Checks for programs.
AC_PROG_CC
AC_CHECK_PROG(found_cc, "$CC", yes, no)
test "x$found_cc" = "xyes" || exit 1
AC_PROG_CXX
AC_CHECK_PROG(found_cxx, "$CXX", yes, no)
test "x$found_cxx" = "xyes" || exit 1
AC_PROG_LIBTOOL

# Checks for header files.
AC_HEADER_STDC
AC_CHECK_HEADERS([limits.h stdint.h getopt.h string.h values.h errno.h])

# Checks for typedefs, structures, and compiler characteristics.
AC_C_CONST

# Check for OpenEXR.
PKG_CHECK_MODULES(OPENEXR, OpenEXR >= 1.0.6)
AC_SUBST(OPENEXR_CFLAGS)
AC_SUBST(OPENEXR_LIBS)

# Check for zlib.
AC_CHECK_LIB(z, gzsetparams,
        [ AC_CHECK_HEADER(zlib.h,
          have_zlib=yes
          ZLIB_LIBS="-lz",)], AC_MSG_ERROR(zlib needed))
AM_CONDITIONAL(HAVE_ZLIB, [test x"$have_zlib" = "xyes"])
AC_SUBST(ZLIB_LIBS)

# Check for libpng.
AC_CHECK_LIB(png, png_read_png,
        [ AC_CHECK_HEADER(png.h,
          have_libpng=yes
          PNG_LIBS="-lpng $ZLIB_LIBS -lm",)], AC_MSG_WARN(libpng needed for exrtopng and pngtoexr), "$ZLIB_LIBS" -lm)
AM_CONDITIONAL(HAVE_LIBPNG, [test x"$have_libpng" = "xyes"])
AC_SUBST(PNG_LIBS)

# Check for libjpeg.
AC_CHECK_LIB(jpeg, jpeg_destroy_decompress,
        [ AC_CHECK_HEADER(jpeglib.h,
          have_libjpeg=yes
          JPEG_LIBS="-ljpeg",)], AC_MSG_WARN(libjpeg needed for jpegtoexr),)
AM_CONDITIONAL(HAVE_LIBJPEG, [test x"$have_libjpeg" = "xyes"])
AC_SUBST(JPEG_LIBS)

AC_CONFIG_FILES([
	Makefile
	docs/Makefile
	src/Makefile
])
AC_OUTPUT