[Shared] provide option to use AddressSanitizer

Author: Razish

CMakeLists.txt

@@ -50,6 +50,7 @@ option(BuildJK2SPGame "Whether to create projects for the jk2 sp gamecode mod (j
 option(BuildJK2SPRdVanilla "Whether to create projects for the jk2 sp renderer (rdjosp-vanilla_x86.dll)" OFF)
 
 option(BuildTests "Whether to build automatic unit tests (requires Boost)" OFF)
+option(UseSanitizer "Whether to enable runtime sanitizers (e.g. AddressSanitizer)" OFF)
 
 include(CMakeDependentOption)
 cmake_dependent_option(BuildSymbolServer "Build WIP Windows Symbol Server (experimental and unused)" OFF "NOT WIN32 OR NOT MSVC" OFF)
@@ -244,6 +245,11 @@ elseif (("${CMAKE_C_COMPILER_ID}" STREQUAL "GNU") OR ("${CMAKE_C_COMPILER_ID}" M
 	set(CMAKE_SHARED_LIBRARY_LINK_C_FLAGS "")
 	set(CMAKE_SHARED_LIBRARY_LINK_CXX_FLAGS "")
 
+	if(CMAKE_BUILD_TYPE MATCHES "DEBUG" OR CMAKE_BUILD_TYPE MATCHES "Debug" AND UseSanitizer)
+		add_compile_options(-fsanitize=address)
+		add_link_options(-fsanitize=address)
+	endif()
+
 	# additional flags for debug configuration
 	set(CMAKE_C_FLAGS_DEBUG "${CMAKE_C_FLAGS_DEBUG} -ggdb")
 	set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -ggdb")