cmake: fix some linking issue with gold linker (AFAIK only fedora use it for the moment)

git-svn-id: http://pcsx2.googlecode.com/svn/trunk@4913 96395faa-99c1-11dd-bbfe-3dabce05a288

3rdparty/SDL-1.3.0-5387/CMakeLists.txt

@@ -388,16 +388,11 @@ set(SDL_sources
 
 #include_directories( ${SDL_ROOT}/include /usr/include/kde/artsc /usr/include/directfb)
 
-
 # Hiden option. It is only a temporary workaround of issue 1003. The purpose is to LD_PRELOAD
 # the library so it avoid any conflict with previous SDL1.2 symbol
 if (DEFINED SHARED_SDL)
     add_library(${Output} SHARED ${SDL_sources} )
 
-    # Seem to be needed when pre-loading on Fedora
-    target_link_libraries(${Output} dl)
-    target_link_libraries(${Output} m)
-
     # Install the library with others plugins
     if(PACKAGE_MODE)
         install(TARGETS ${Output} DESTINATION ${PLUGIN_DIR})
@@ -410,6 +405,9 @@ else (DEFINED SHARED_SDL)
     add_library(${Output} STATIC ${SDL_sources} )
 endif (DEFINED SHARED_SDL)
 
+# Gold (new linux linker) does not get automatically dependency of dependency so you must add
+# them manually.
+target_link_libraries(${Output} ${LIBC_LIBRARIES})
 
 # User flags options
 if(NOT USER_CMAKE_LD_FLAGS STREQUAL "")

cmake/FindLibc.cmake

@@ -0,0 +1,21 @@
+# Once done, this will define
+#
+# LIBC_FOUND - system has libc 
+# LIBC_LIBRARIES - link these to use libc
+
+if(LIBC_LIBRARIES)
+    set(LIBC_FIND_QUIETLY TRUE)
+endif(LIBC_LIBRARIES)
+
+find_library(librt NAMES rt)
+find_library(libdl NAMES dl)
+find_library(libm NAMES m)
+set(LIBC_LIBRARIES ${librt} ${libdl} ${libm})
+
+# handle the QUIETLY and REQUIRED arguments and set LIBC_FOUND to TRUE if 
+# all listed variables are TRUE
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(Libc DEFAULT_MSG LIBC_LIBRARIES)
+
+mark_as_advanced(LIBC_LIBRARIES)
+

cmake/SearchForStuff.cmake

@@ -55,6 +55,7 @@ endif(NOT FORCE_INTERNAL_ZLIB)
 ## Use pcsx2 package to find module
 include(FindCg)
 include(FindGlew)
+include(FindLibc)
 include(FindPortAudio)
 if(NOT FORCE_INTERNAL_SOUNDTOUCH)
     include(FindSoundTouch)

common/src/Utilities/CMakeLists.txt

@@ -179,6 +179,10 @@ add_library(${Output} STATIC ${UtilitiesSources} ${UtilitiesHeaders} ${Utilities
 # link target with wx
 target_link_libraries(${Output} ${wxWidgets_LIBRARIES})
 
+# Gold (new linux linker) does not get automatically dependency of dependency so you must add
+# them manually.
+target_link_libraries(${Output} ${LIBC_LIBRARIES})
+
 # User flags options
 if(NOT USER_CMAKE_LD_FLAGS STREQUAL "")
     target_link_libraries(${Output} "${USER_CMAKE_LD_FLAGS}")