Fix discord-rpc build when ASLR is enabled

3rdparty/discord-rpc/CMakeLists.txt

@@ -1,36 +1,13 @@
 # DiscordRPC
+
 add_library(3rdparty_discordRPC INTERFACE)
 
-check_cxx_compiler_flag("-msse -msse2 -mcx16" COMPILER_X86)
+if (USE_DISCORD_RPC AND (WIN32 OR CMAKE_SYSTEM MATCHES "Linux" OR APPLE))
+	set(BUILD_EXAMPLES FALSE CACHE BOOL "Build example apps")
+	set(ENABLE_IO_THREAD TRUE CACHE BOOL "Start up a separate I/O thread, otherwise I'd need to call an update function")
+	set(USE_STATIC_CRT FALSE CACHE BOOL "Use /MT[d] for dynamic library")
+	set(WARNINGS_AS_ERRORS FALSE CACHE BOOL "When enabled, compiles with `-Werror` (on *nix platforms).")
 
-# We don't want Discord Rich Presence on the BSDs and other OSes
-if (USE_DISCORD_RPC AND (WIN32 OR CMAKE_SYSTEM MATCHES "Linux" OR APPLE) AND COMPILER_X86)
-	if (WIN32 AND NOT MSVC)
-		ExternalProject_Add(discordRPC
-				GIT_REPOSITORY https://github.com/discordapp/discord-rpc
-				BINARY_DIR ${CMAKE_CURRENT_BINARY_DIR}
-				INSTALL_COMMAND ""
-			)
-
-	endif()
-
-	target_include_directories(3rdparty_discordRPC INTERFACE include)
-	target_compile_definitions(3rdparty_discordRPC INTERFACE -DWITH_DISCORD_RPC)
-
-	set(DISCORD_RPC_LIB NOTFOUND)
-	if (WIN32)
-		if (NOT MSVC)
-			set(DISCORD_RPC_LIB ${CMAKE_CURRENT_BINARY_DIR}/src/libdiscord-rpc.a)
-		else()
-			find_library(DISCORD_RPC_LIB discord-rpc PATHS lib/ NO_DEFAULT_PATH)
-		endif()
-	elseif(CMAKE_SYSTEM MATCHES "Linux")
-		find_library(DISCORD_RPC_LIB discord-rpc-linux PATHS lib/ NO_DEFAULT_PATH)
-	elseif(APPLE)
-		find_library(DISCORD_RPC_LIB discord-rpc-mac PATHS lib/ NO_DEFAULT_PATH)
-	endif()
-	target_link_libraries(3rdparty_discordRPC INTERFACE ${DISCORD_RPC_LIB})
-	if(APPLE)
-		target_link_libraries(3rdparty_discordRPC INTERFACE "objc" "-framework Foundation" "-framework CoreServices")
-	endif()
+	add_subdirectory(discord-rpc EXCLUDE_FROM_ALL)
+	target_link_libraries(3rdparty_discordRPC INTERFACE discord-rpc)
 endif()