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# This file is part of dvisvgm
# Copyright (C) 2005-2018 Martin Gieseking <martin.gieseking@uos.de>
#
# Process this file with autoconf to produce a configure script.

AC_PREREQ(2.59)
AC_INIT([dvisvgm],[2.4],[martin.gieseking@uos.de])
DATE="April 2018"
AC_CONFIG_SRCDIR(src)
AC_CONFIG_HEADERS([config.h])
AC_CONFIG_MACRO_DIR([m4])
AC_CANONICAL_HOST
AC_CANONICAL_TARGET
AM_INIT_AUTOMAKE([subdir-objects])

AH_TEMPLATE([TARGET_SYSTEM], [The machine triplet of the target system])
AC_DEFINE_UNQUOTED([TARGET_SYSTEM], ["$target"])

# Checks for programs.
AC_PROG_CC
AC_PROG_CC_C99
AC_PROG_CXX
AX_CXX_COMPILE_STDCXX([11])
AM_PROG_AR
LT_INIT

AC_PROG_RANLIB
AC_LANG(C)

AC_CHECK_HEADERS([sys/time.h sys/timeb.h xlocale.h])
AC_HEADER_TIOCGWINSZ

CPPFLAGS_SAVE="$CPPFLAGS"
CFLAGS_SAVE="$CFLAGS"
LDFLAGS_SAVE="$LDFLAGS"

# Check availability and usability of the kpathsea library
AC_ARG_VAR(KPSE_CFLAGS, [C/C++ compiler flags for the kpathsea library])
AC_ARG_VAR(KPSE_LIBS, [linker flags for the kpathsea library])
AC_ARG_VAR(KPSE_LIBS, [])
AC_ARG_WITH([kpathsea],
	[AS_HELP_STRING([--with-kpathsea=prefix], [set location of kpathsea library])],
	[with_kpathsea="$withval"],
	[with_kpathsea=yes])

AS_IF([test "x$with_kpathsea" != "xyes"],
	[KPSE_CFLAGS="-I$with_kpathsea/include" KPSE_LIBS="-L$with_kpathsea/lib"]
	[CPPFLAGS="$CPPFLAGS $KPSE_CFLAGS" CFLAGS="$CFLAGS $KPSE_CFLAGS" LDFLAGS="$LDFLAGS $KPSE_LIBS"])

AC_CHECK_HEADER([kpathsea/kpathsea.h],,
	[AC_MSG_ERROR([please install the kpathsea development package])])
AC_CHECK_LIB([kpathsea], [kpse_find_file],,
	[AC_MSG_ERROR([libkpathsea not found, please install the corresponding package first])])

AC_MSG_CHECKING([kpathsea version])
AC_RUN_IFELSE([AC_LANG_SOURCE([#include <stdio.h>
	#include <kpathsea/kpathsea.h>
	int main() {
		FILE *f;
		f = fopen("kpseversion", "w");
		if(!f) exit(1);
		fprintf(f, "%s\n", KPSEVERSION);
		fclose(f);
		exit(0);
	}])],
	[kpseversion=`cat kpseversion|sed 's/kpathsea version //'`], [kpseversion=], [kpseversion=unknown])
AC_MSG_RESULT("$kpseversion")
rm -f kpseversion
AS_IF([test -z "$kpseversion"],
	[AC_MSG_ERROR([Could not compile a simple kpathsea program -- check your installation])])
AC_SUBST(KPSE_CFLAGS)
AC_SUBST(KPSE_LIBS)

# Check how to link potrace library
AC_CHECK_HEADER([potracelib.h],
	[AC_CHECK_LIB(m, sqrt)] # required to pass potrace check
	[AC_CHECK_LIB(potrace, potrace_trace,,
		[AC_MSG_ERROR([potrace library not found])])])

# Check how to link Ghostscript
have_libgs=yes
AC_CHECK_HEADER([ghostscript/iapi.h],
	[AC_CHECK_LIB(gs, gsapi_revision,, [have_libgs=no])],
	[have_libgs=no])
AS_IF([test "x$have_libgs" = "xno"],
	# Ghostscript not found, check for dlopen
	[AC_CHECK_LIB(dl, dlopen,,
		[AC_DEFINE(DISABLE_GS, 1, [Set to 1 if PostScript support should be disabled])]
		[AC_MSG_WARN(PostScript support disabled)])])

# Check for pkg-config
PKG_PROG_PKG_CONFIG

# Check for libraries.
PKG_CHECK_MODULES([FREETYPE], [freetype2])

AC_ARG_ENABLE([woff],
	[AS_HELP_STRING([--disable-woff], [Disable WOFF support @<:@default=no@:>@])],
	[],
	[enable_woff=yes])

AC_ARG_WITH([ttfautohint],
	[AS_HELP_STRING([--with-ttfautohint@<:@=prefix@:>@], [enable ttfautohint support (disabled by default)])],
	[with_ttfautohint="$withval"],
	[with_ttfautohint=no])

AM_CONDITIONAL([ENABLE_WOFF], [test "x$enable_woff" = "xyes"])
AS_IF([test "x$enable_woff" != "xyes"],
	[AC_DEFINE([DISABLE_WOFF], 1, [Define if WOFF support is disabled])],
	[AS_IF([test "x$with_ttfautohint" != "xno"],
		[AS_IF([test "x$with_ttfautohint" = "xyes"],
			# --with-ttfautohint without path => check via pkg-config
			[PKG_CHECK_MODULES([TTFAUTOHINT], [ttfautohint],,
				[AC_MSG_ERROR([can't locate ttfautohint, use "--with-ttfautohint=path" to specify its location])])],
			# --with-ttfautohint=/path/ttfautohint given
			[TTFAUTOHINT_CFLAGS="-I$with_ttfautohint/include"]
			[TTFAUTOHINT_LIBS="-L$with_ttfautohint/lib"])]
		[CPPFLAGS="$CPPFLAGS $TTFAUTOHINT_CFLAGS" CFLAGS="$CFLAGS $TTFAUTOHINT_CFLAGS" LDFLAGS="$LDFLAGS $TTFAUTOHINT_LIBS"]
		[AC_CHECK_HEADERS([ttfautohint.h],, [AC_MSG_WARN([ttfautohint.h not found])])]
		[AC_CHECK_LIB([ttfautohint], [TTF_autohint],,
			[AC_MSG_WARN([no working ttfautohint library found])]
			[AC_CHECK_LIB(dl, dlopen,
				[AC_MSG_NOTICE([enabled dynamic loading of ttfautohint])],
				[AC_MSG_WARN([disabled ttfautohint support])])])]
		[AC_SUBST(TTFAUTOHINT_CFLAGS) AC_SUBST(TTFAUTOHINT_LIBS)])])

AC_CHECK_LIB(z, gzopen)

# Check for header files.
AC_HEADER_DIRENT
AC_HEADER_STDC
AC_CHECK_HEADERS([libintl.h stdlib.h string.h strings.h unistd.h])

# Check for typedefs, structures, and compiler characteristics.
AC_HEADER_STDBOOL
AC_TYPE_SIZE_T
AC_STRUCT_TM

# Check for library functions.
AC_FUNC_STAT
AC_CHECK_FUNCS([ftime gettimeofday sigaction uselocale])

# add options for selection of "optional" library locations
# currently these libraries are mandatory; the --with-foo options
# are used to specify the locations explicitely

AC_ARG_WITH(zlib,
	[AS_HELP_STRING([--with-zlib=DIR], [set location of the zlib library])],
	[AS_IF([test "x$withval" != "xno"],
		[AS_IF([test "x$withval" != "xyes"], [ZLIB_DIR=$withval])]
		[AS_IF([test -n "$ZLIB_DIR"],
			[ZLIB_CFLAGS="-I$ZLIB_DIR -I$ZLIB_DIR/include"]
			[ZLIB_LIBS="-L$ZLIB_DIR/lib" -lz])])])

AC_SUBST([ZLIB_CFLAGS])
AC_SUBST([ZLIB_LIBS])

# Check if the kpathsea headers are C++ safe
AC_MSG_CHECKING([if the kpathsea headers are C++ safe])
AC_LANG_PUSH([C++])
AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <kpathsea/kpathsea.h>]],
                                [[printf("%s\n", concat("one", "two"))]])],
               [AC_MSG_RESULT([yes])],
               [AC_MSG_RESULT([no])
                AC_DEFINE([KPSE_CXX_UNSAFE], 1,
                          [Define to 1 if the kpathsea headers are not C++ safe.])])
AC_LANG_POP([C++])

CPPFLAGS="$CPPFLAGS_SAVE"
CFLAGS="$CFLAGS_SAVE"
LDFLAGS="$LDFLAGS_SAVE"

AX_CODE_COVERAGE
AS_IF([ test "$enable_code_coverage" = "yes" ], [
	# disable optimization
	changequote({,})
	CFLAGS=`echo $CFLAGS | sed 's/-O[1-9s]//g'`
	CXXFLAGS=`echo $CXXFLAGS | sed 's/-O[1-9s]//g'`
	changequote([,])
])

AC_SUBST(DATE)
AC_SUBST(AM_CPPFLAGS)
AC_SUBST(AM_LDFLAGS)
AC_CONFIG_FILES([
	Makefile
	libs/Makefile
	libs/brotli/Makefile
	libs/clipper/Makefile
	libs/ff-woff/Makefile
	libs/variant/Makefile
	libs/woff2/Makefile
	libs/xxHash/Makefile
	src/Makefile
	src/version.hpp
	tests/Makefile
	tests/data/Makefile
	doc/dvisvgm.txt
	doc/Makefile])
AC_OUTPUT