From f0b946c3cf73266d1d849e424a37330c39707bd1 Mon Sep 17 00:00:00 2001
From: Braden Obrzut <admin@maniacsvault.net>
Date: Wed, 6 Nov 2013 13:37:34 -0500
Subject: [PATCH] - Allow use of system GME library.  It defaults to forcing
 the use of the internal library at least for now though.

---
 CMakeLists.txt          | 19 ++++++++++++++++++-
 src/CMakeLists.txt      |  7 +++----
 src/sound/music_gme.cpp |  2 +-
 3 files changed, 22 insertions(+), 6 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 4740603b0..3715cdac8 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -3,6 +3,7 @@ project(ZDoom)
 
 list( APPEND CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR} )
 include( CreateLaunchers )
+include( FindPackageHandleStandardArgs )
 
 # Generator expression are available some time in CMake 2.8. Due to
 # cmake_minimum_required, we can assume a minor version of > 7 implies major >= 2
@@ -72,6 +73,13 @@ set(CMAKE_MODULE_PATH "${CMAKE_SOURCE_DIR}")
 find_package( BZip2 )
 find_package( JPEG )
 find_package( ZLIB )
+# GME
+find_path( GME_INCLUDE_DIR gme.h )
+find_library( GME_LIBRARIES gme )
+mark_as_advanced( GME_INCLUDE_DIR GME_LIBRARIES )
+FIND_PACKAGE_HANDLE_STANDARD_ARGS( GME
+	REQUIRED_VARS GME_LIBRARIES GME_INCLUDE_DIR
+)
 
 if( MSVC )
 	# Eliminate unreferenced functions and data
@@ -125,6 +133,7 @@ set( CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} ${DEB_C_FLAGS} -D_DEBUG" )
 option(FORCE_INTERNAL_ZLIB "Use internal zlib")
 option(FORCE_INTERNAL_JPEG "Use internal jpeg")
 option(FORCE_INTERNAL_BZIP2 "Use internal bzip2")
+option(FORCE_INTERNAL_GME "Use internal gme" ON)
 
 if( ZLIB_FOUND AND NOT FORCE_INTERNAL_ZLIB )
 	message( STATUS "Using system zlib" )
@@ -156,11 +165,19 @@ else( BZIP2_FOUND AND NOT FORCE_INTERNAL_BZIP2 )
 	set( BZIP2_LIBRARY bz2 )
 endif( BZIP2_FOUND AND NOT FORCE_INTERNAL_BZIP2 )
 
+if( GME_FOUND AND NOT FORCE_INTERNAL_GME )
+	message( STATUS "Using system gme library ${GME_INCLUDE_DIR}" )
+else( GME_FOUND AND NOT FORCE_INTERNAL_GME )
+	message( STATUS "Using internal gme library" )
+	add_subdirectory( game-music-emu )
+	set( GME_INCLUDE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/game-music-emu" )
+	set( GME_LIBRARIES gme )
+endif( GME_FOUND AND NOT FORCE_INTERNAL_GME )
+
 set( LZMA_INCLUDE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/lzma/C" )
 
 add_subdirectory( lzma )
 add_subdirectory( tools )
-add_subdirectory( game-music-emu )
 add_subdirectory( dumb )
 add_subdirectory( gdtoa )
 add_subdirectory( wadsrc )
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 9506e6a59..268c1d705 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -503,8 +503,8 @@ add_custom_target( revision_check ALL
 # Libraries ZDoom needs
 
 message( STATUS "Fluid synth libs: ${FLUIDSYNTH_LIBRARIES}" )
-set( ZDOOM_LIBS ${ZDOOM_LIBS} "${ZLIB_LIBRARIES}" "${JPEG_LIBRARIES}" "${BZIP2_LIBRARIES}" "${FMOD_LIBRARY}" )
-include_directories( "${ZLIB_INCLUDE_DIR}" "${FMOD_INCLUDE_DIR}" "${BZIP2_INCLUDE_DIR}" "${LZMA_INCLUDE_DIR}" "${JPEG_INCLUDE_DIR}" )
+set( ZDOOM_LIBS ${ZDOOM_LIBS} "${ZLIB_LIBRARIES}" "${JPEG_LIBRARIES}" "${BZIP2_LIBRARIES}" "${GME_LIBRARIES}" "${FMOD_LIBRARY}" )
+include_directories( "${ZLIB_INCLUDE_DIR}" "${FMOD_INCLUDE_DIR}" "${BZIP2_INCLUDE_DIR}" "${LZMA_INCLUDE_DIR}" "${JPEG_INCLUDE_DIR}" "${GME_INCLUDE_DIR}" )
 
 if( FLUIDSYNTH_FOUND )
   if( NOT DYN_FLUIDSYNTH)
@@ -1065,7 +1065,7 @@ if(${CMAKE_SYSTEM_NAME} STREQUAL "SunOS")
 	set( ZDOOM_LIBS ${ZDOOM_LIBS} nsl socket)
 endif(${CMAKE_SYSTEM_NAME} STREQUAL "SunOS")
 
-target_link_libraries( zdoom ${ZDOOM_LIBS} gme gdtoa dumb lzma )
+target_link_libraries( zdoom ${ZDOOM_LIBS} gdtoa dumb lzma )
 include_directories( .
 	g_doom
 	g_heretic
@@ -1079,7 +1079,6 @@ include_directories( .
 	thingdef
 	timidity
 	xlat
-	../game-music-emu/gme
 	../gdtoa
 	../dumb/include
 	${CMAKE_BINARY_DIR}/gdtoa
diff --git a/src/sound/music_gme.cpp b/src/sound/music_gme.cpp
index 0c3d8c8c3..7f017b7d2 100644
--- a/src/sound/music_gme.cpp
+++ b/src/sound/music_gme.cpp
@@ -40,7 +40,7 @@
 #include "i_musicinterns.h"
 #include "c_cvars.h"
 #include "critsec.h"
-#include "gme.h"
+#include <gme/gme.h>
 #include "v_text.h"
 
 // MACROS ------------------------------------------------------------------