Revert "Revert "CMake: workaround for CMake-Mac OS X fail""

Tests have shown this to work, and the simpler method not :/
Thanks to pepijn for testing

This reverts commit 10d1f64.

AI/Interfaces/C/CMakeLists.txt

@@ -46,6 +46,8 @@ macro    (ConfigureNativeSkirmishAI mySourceDirRel_var additionalSources_var add
 
 		# Compile the library
 		add_library(${myTarget} MODULE ${mySources} ${additionalSources})
+		FixLibName(${myTarget})
+
 		target_link_libraries(${myTarget} ${additionalLibraries})
 		set_target_properties(${myTarget} PROPERTIES COMPILE_FLAGS "${additionalCompileFlags}")
 		set_target_properties(${myTarget} PROPERTIES OUTPUT_NAME   "SkirmishAI")
@@ -99,6 +101,8 @@ if    (BUILD_${myName}_AIINTERFACE)
 
 	aux_source_directory(${mySourceDir} mySources)
 	add_library(${myTarget} MODULE ${mySources} ${ai_common_SRC} ${CUtils_SRC})
+	FixLibName(${myTarget})
+
 	set_target_properties(${myTarget} PROPERTIES OUTPUT_NAME "AIInterface")
 
 	# Install the data files

AI/Interfaces/Java/CMakeLists.txt

@@ -327,6 +327,7 @@ if    (BUILD_${myName}_AIINTERFACE)
 	endif (MINGW)
 	include_directories(BEFORE ${rts}/lib/streflop)
 	add_library(${myTarget} MODULE ${myNativeSources} ${ai_common_SRC} ${CUtils_SRC})
+	FixLibName(${myTarget})
 	target_link_libraries(${myTarget} streflop)
 	set_target_properties(${myTarget} PROPERTIES COMPILE_FLAGS "-DUSING_STREFLOP")
 	set_target_properties(${myTarget} PROPERTIES OUTPUT_NAME   "AIInterface")

CMakeLists.txt

@@ -2,6 +2,17 @@
 cmake_minimum_required(VERSION 2.6)
 project(Spring)
 
+# This is needed, as CMake, or at least soem versions of it (eg. 2.8),
+# falsely use the ".so" suffix unde Mac OS X for MODULE's
+macro    (FixLibName targetName)
+	IF    (UNIX)
+		SET_TARGET_PROPERTIES(${targetName} PROPERTIES PREFIX "lib")
+		IF    (APPLE)
+			SET_TARGET_PROPERTIES(${targetName} PROPERTIES SUFFIX ".dylib")
+		ENDIF (APPLE)
+	ENDIF (UNIX)
+endmacro (FixLibName targetName)
+
 LIST(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/rts/build/cmake")
 
 ### Install path (relative to CMAKE_INSTALL_PREFIX)