CMake build system improvements, it uses the cmake modules to find the libraries instead of the hardcoded system.

Irrlicht is autodetected if it is installed in /usr or /usr/local on linux
font_tool work (well, it does not work because there are some compilation error due to system specific libs I think, but I have it working if I change some code in src/font_tool/main.cpp, but I don't want to commit my modifications since I am not sure what this tool should do).
Detect when a library is not present and put an error when it is the cases.
Some paths change to have it working on out of source builds too.
Remove the DEBUG option, since cmake has already one to do that, -DCMAKE_BUILD_TYPE=Debug
Let me know if there are any problem/regressions with it, or just revert ;)

git-svn-id: svn+ssh://svn.code.sf.net/p/supertuxkart/code/main/trunk@9405 178a84e3-b1eb-0310-8ba1-8eac791a3b58

CMakeLists.txt

@@ -15,8 +15,14 @@ set(STK_SOURCE_DIR "src")
 set(CMAKE_RUNTIME_OUTPUT_DIRECTORY "bin")
 
 # Tweakable values
-option(DEBUG "Enable debugging and turn assertions on" OFF)
+if(CMAKE_BUILD_TYPE MATCHES "Debug")
+	set(DEBUG ON)
+else(CMAKE_BUILD_TYPE MATCHES "Debug")
+	set(DEBUG OFF)
+endif(CMAKE_BUILD_TYPE MATCHES "Debug")
+
 option(USE_FRIBIDI "Support for right-to-left languages" ON)
+option(FONT_TOOL "Compile font tool" OFF)
 set(IRRLICHT_DIR "/path/to/irrlicht" CACHE STRING "Path to Irrlicht")
 
 # Build the Bullet physics library
@@ -26,7 +32,6 @@ add_subdirectory("${STK_SOURCE_DIR}/bullet")
 add_subdirectory("${STK_SOURCE_DIR}/enet")
 
 # Set include paths
-include_directories("${IRRLICHT_DIR}/include")
 include_directories("${STK_SOURCE_DIR}")
 include_directories("${STK_SOURCE_DIR}/enet/include")
 include_directories("${STK_SOURCE_DIR}/bullet/src")
@@ -44,15 +49,61 @@ endif()
 
 link_directories("${STK_SOURCE_DIR}/bullet")
 
+# OpenGL
+find_package(OpenGL)
+
+if(OPENGL_FOUND)
+	message("-- OpenGL found (include dirs: ${OPENGL_INCLUDE_DIR})")
+	include_directories(${OPENGL_INCLUDE_DIR})
+else()
+	message(FATAL_ERROR "OpenGL not found.")
+endif()
+
+if(UNIX)
+	# X11, stk requires xf86vm
+	find_package(X11)
+
+	if(X11_FOUND)
+		message("-- X11 libs found")
+	else()
+		message(FATAL_ERROR "X11 not found.")
+	endif()
+endif()
+
+# OpenAL
+
+find_package(OpenAL)
+
+if(OPENAL_FOUND)
+	message("-- OpenAL found (include dirs: ${OPENAL_INCLUDE_DIR})")
+	include_directories(${OPENAL_INCLUDE_DIR})
+else()
+	message(FATAL_ERROR "OpenAL not found.")
+endif()
+
+
+# Check if we finally got irrlicht
+find_path(HAVE_IRRLICHT irrlicht.h PATHS ${IRRLICHT_DIR} ${IRRLICHT_DIR}/include /usr/include/irrlicht/ /usr/local/include/irrlicht/)
+
+if(HAVE_IRRLICHT)
+	message("-- Irrlicht found (in ${HAVE_IRRLICHT}/irrlicht.h)")
+else()
+	message(FATAL_ERROR "\n  --  Irrlicht not found (can't locate irrlicht.h)\n Use -DIRRLICHT_DIR=/path/to/irrlicht")
+endif()
+
+include_directories(${HAVE_IRRLICHT})
+
+# CURL
+find_package(CURL)
+if(CURL_FOUND)
+	include_directories(${CURL_INCLUDE_DIRS})
+else()
+	message(FATAL_ERROR "-- libcURL not found, please install it.")
+endif()
+
 # Set some compiler options
 if(UNIX)
 	add_definitions(-Wall)
-	
-	if(DEBUG)
-		add_definitions(-g)
-	else()
-		add_definitions(-O3)
-	endif()
 endif()
 
 add_definitions(-DHAVE_OGGVORBIS)	# TODO: remove this switch
@@ -63,12 +114,25 @@ else()
 	add_definitions(-DNDEBUG)
 endif()
 
-# TODO
+find_package(Freetype)
-# include_directories("/usr/include/freetype2")	
+
-#~ src/font_tool/CFontTool.cpp
+if(FREETYPE_FOUND AND FONT_TOOL)
-#~ src/font_tool/CFontTool.h
+	message("-- Freetype found")
-#~ src/font_tool/CVectorFontTool.h
+	find_package(X11)
-#~ src/font_tool/main.cpp
+	include_directories(${FREETYPE_INCLUDE_DIRS})
+	add_executable(font_tool
+		src/font_tool/CFontTool.cpp
+		src/font_tool/CFontTool.h
+		src/font_tool/CVectorFontTool.h
+		src/font_tool/main.cpp
+	)
+	target_link_libraries(font_tool ${FREETYPE_LIBRARIES})
+	target_link_libraries(font_tool ${X11_Xft_LIB})
+	target_link_libraries(font_tool ${OPENGL_LIBRARIES})
+	target_link_libraries(font_tool Irrlicht)
+else()
+	message("-- Font tool deactivated/freetype not found, the font tool won't be built (only useful for developers)")
+endif()
 
 # Build the final executable
 add_executable(supertuxkart
@@ -536,7 +600,9 @@ target_link_libraries(supertuxkart
 	bulletcollision
 	bulletmath
 	enet
-	curl
+	${CURL_LIBRARIES}
+	${OPENGL_LIBRARIES}
+	${OPENAL_LIBRARY}
 	vorbisfile)
 	
 if(USE_FRIBIDI)
@@ -544,11 +610,10 @@ if(USE_FRIBIDI)
 		fribidi)
 endif()
 	
-if(UNIX)
+if(UNIX AND NOT APPLE)
 	target_link_libraries(supertuxkart
-		GL
-		openal
 		Xxf86vm)
 elseif(APPLE)
 	# TODO!
+	# xapantu (1/08/11): all libs are added by cmake, it should work
 endif()

src/bullet/CMakeLists.txt

@@ -1,6 +1,6 @@
 # CMakeLists.txt for Bullet in STK
 
-include_directories(".")
+include_directories(${CMAKE_CURRENT_SOURCE_DIR}/src/)
 
 # libbulletmath
 add_library(bulletmath