From: Jan Engelhardt <jengelh@inai.de>
Date: 2015-01-20 20:46:39.043255730 +0100

build: löve uses an undocumented way of including freetype headers

Replace the (unsupported) #include <freetype/XX> paths by just <XX> as required
by upstream, and use pkg-config — not just for freetype, but also lua, and, by
extension, opportunistically for SDL/GL.

---
 configure.in                                   |   36 ++++++-------------------
 src/Makefile.am                                |    7 +---
 src/modules/font/freetype/Font.h               |    8 ++---
 src/modules/font/freetype/TrueTypeRasterizer.h |    8 ++---
 4 files changed, 20 insertions(+), 39 deletions(-)

Index: love-HEAD/configure.in
===================================================================
--- love-HEAD.orig/configure.in
+++ love-HEAD/configure.in
@@ -2,40 +2,24 @@ AC_INIT([love], [HEAD])
 AC_CONFIG_HEADERS([config.h])
 AC_CONFIG_AUX_DIR([platform/unix])
 AC_CONFIG_SRCDIR([src/love.cpp])
-AM_INIT_AUTOMAKE([foreign -Wall foreign tar-ustar])
+AM_INIT_AUTOMAKE([foreign -Wall foreign tar-ustar subdir-objects subdir-objects])
 AC_PREFIX_DEFAULT([/usr])
 AC_PROG_LIBTOOL
 AC_PROG_CC
 AC_PROG_CXX
 AC_SEARCH_LIBS([sqrt], [m], [], AC_MSG_ERROR([Can't LÖVE without C math library]))
-AC_SEARCH_LIBS([SDL_Init], [SDL], [], AC_MSG_ERROR([Can't LÖVE without SDL]))
-AC_SEARCH_LIBS([glLoadIdentity], [GL], [], AC_MSG_ERROR([Can't LÖVE without OpenGL]))
-#AC_SEARCH_LIBS([gluOrtho2D], [GLU], [], AC_MSG_ERROR([Can't LÖVE without OpenGL Utility Library]))
-AC_SEARCH_LIBS([alSourcePlay], [openal], [], AC_MSG_ERROR([Can't LÖVE without OpenAL]))
-AC_ARG_ENABLE([luajit],
-	[  --enable-luajit Use LuaJIT instead of lua],
-	AC_SEARCH_LIBS(
-		[lua_pcall],
-		[luajit luajit-5.1],
-		AC_SUBST([INCLUDE_LUA], [-I/usr/include/luajit-2.0]),
-		AC_MSG_ERROR([Can't LÖVE without LuaJIT])
-	),
-	AC_SEARCH_LIBS(
-		[lua_pcall],
-		[lua lua5.1],
-		if test "$ac_cv_search_lua_pcall" = "-llua5.1"; then
-			AC_SUBST([INCLUDE_LUA], [-I/usr/include/lua5.1])
-		fi,
-		AC_MSG_ERROR([Can't LÖVE without Lua])
-	)
-)
-AC_SEARCH_LIBS([ilInit], [IL], [], AC_MSG_ERROR([Can't LÖVE without DevIL]))
+PKG_CHECK_MODULES([sdl], [sdl])
+PKG_CHECK_MODULES([gl], [gl])
+dnl PKG_CHECK_MODULES([glu], [glu])
+PKG_CHECK_MODULES([al], [openal])
+PKG_CHECK_MODULES([lua], [lua5.1])
+PKG_CHECK_MODULES([il], [IL])
 AC_SEARCH_LIBS([mng_initialize], [mng], [], AC_MSG_ERROR([DevIL needs MNG]))
 AC_SEARCH_LIBS([TIFFOpen], [tiff], [], AC_MSG_ERROR([DevIL needs TIFF]))
-AC_SEARCH_LIBS([FT_Load_Glyph], [freetype], [], AC_MSG_ERROR([Can't LÖVE without FreeType]))
+PKG_CHECK_MODULES([ft], [freetype2])
 AC_SEARCH_LIBS([PHYSFS_init], [physfs], [], AC_MSG_ERROR([Can't LÖVE without PhysicsFS]))
-AC_SEARCH_LIBS([ModPlug_Load], [modplug], [], AC_MSG_ERROR([Can't LÖVE without ModPlug]))
-AC_SEARCH_LIBS([ov_open], [vorbisfile], [], AC_MSG_ERROR([Can't LÖVE without VorbisFile]))
+PKG_CHECK_MODULES([modplug], [libmodplug])
+PKG_CHECK_MODULES([vorbisfile], [vorbisfile])
 AC_CONFIG_FILES([
 	Makefile
 	src/Makefile
Index: love-HEAD/src/Makefile.am
===================================================================
--- love-HEAD.orig/src/Makefile.am
+++ love-HEAD/src/Makefile.am
@@ -1,12 +1,9 @@
-AM_CPPFLAGS = -I. -I./modules -I/usr/include/AL -I/usr/include/freetype2  $(INCLUDE_LUA) -I/usr/include/SDL $(FILE_OFFSET)
-AUTOMAKE_OPTIONS = subdir-objects
-DEFAULT_INCLUDES =
+AM_CPPFLAGS = -I. -I./modules ${al_CFLAGS} ${ft_CFLAGS} ${gl_CFLAGS} ${glu_CFLAGS} ${il_CFLAGS} ${lua_CFLAGS} ${modplug_CFLAGS} ${sdl_CFLAGS} ${vorbisfile_CFLAGS} $(FILE_OFFSET)
 SUBDIRS =
 
 # LÖVE executable
 bin_PROGRAMS = love
-#love_LDFLAGS =
-#love_LDADD =
+love_LDADD = ${al_LIBS} ${ft_LIBS} ${gl_LIBS} ${glu_LIBS} ${il_LIBS} ${lua_LIBS} ${modplug_LIBS} ${sdl_LIBS} ${vorbisfile_LIBS}
 
 love_SOURCES = \
 ./scripts/graphics.lua.h \
Index: love-HEAD/src/modules/font/freetype/Font.h
===================================================================
--- love-HEAD.orig/src/modules/font/freetype/Font.h
+++ love-HEAD/src/modules/font/freetype/Font.h
@@ -30,10 +30,10 @@
 #else
 #include <ft2build.h>
 #endif
-#include <freetype/freetype.h>
-#include <freetype/ftglyph.h>
-#include <freetype/ftoutln.h>
-#include <freetype/fttrigon.h>
+#include FT_FREETYPE_H
+#include FT_GLYPH_H
+#include FT_OUTLINE_H
+#include FT_TRIGONOMETRY_H
 
 namespace love
 {
Index: love-HEAD/src/modules/font/freetype/TrueTypeRasterizer.h
===================================================================
--- love-HEAD.orig/src/modules/font/freetype/TrueTypeRasterizer.h
+++ love-HEAD/src/modules/font/freetype/TrueTypeRasterizer.h
@@ -27,10 +27,10 @@
 
 // TrueType2
 #include <ft2build.h>
-#include <freetype/freetype.h>
-#include <freetype/ftglyph.h>
-#include <freetype/ftoutln.h>
-#include <freetype/fttrigon.h>
+#include FT_FREETYPE_H
+#include FT_GLYPH_H
+#include FT_OUTLINE_H
+#include FT_TRIGONOMETRY_H
 
 namespace love
 {