From ed8f32f03ef01f61f76b5c4dc02abd6f516cd4bb Mon Sep 17 00:00:00 2001 From: Yuri Kunde Schlesner Date: Sun, 21 Dec 2014 05:18:12 -0200 Subject: CMake: Use improved optimization flags on MSVC While not having a noticeable effect on CPU-bound applications, this change gives an about 30-50% increase in performance for games using the GPU. --- CMakeLists.txt | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) (limited to 'CMakeLists.txt') diff --git a/CMakeLists.txt b/CMakeLists.txt index 638b468a..af53bda7 100644 --- a/CMakeLists.txt +++ b/CMakeLists.txt @@ -11,6 +11,25 @@ else() add_definitions(/D_CRT_SECURE_NO_WARNINGS) # set up output paths for executable binaries (.exe-files, and .dll-files on DLL-capable platforms) set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/bin) + + # Tweak optimization settings + # As far as I can tell, there's no way to override the CMake defaults while leaving user + # changes intact, so we'll just clobber everything and say sorry. + message(STATUS "Cache compiler flags ignored, please edit CMakeFiles.txt to change the flags.") + # /MD - Multi-threaded runtime + # /Ox - Full optimization + # /Oi - Use intrinsic functions + # /Oy- - Don't omit frame pointer + # /GR- - Disable RTTI + # /GS- - No stack buffer overflow checks + # /EHsc - C++-only exception handling semantics + set(optimization_flags "/MD /Ox /Oi /Oy- /DNDEBUG /GR- /GS- /EHsc") + # /Zi - Output debugging information + # /Zo - enahnced debug info for optimized builds + set(CMAKE_C_FLAGS_RELEASE "${optimization_flags} /Zi" CACHE STRING "" FORCE) + set(CMAKE_CXX_FLAGS_RELEASE "${optimization_flags} /Zi" CACHE STRING "" FORCE) + set(CMAKE_C_FLAGS_RELWITHDEBINFO "${optimization_flags} /Zi /Zo" CACHE STRING "" FORCE) + set(CMAKE_CXX_FLAGS_RELWITHDEBINFO "${optimization_flags} /Zi /Zo" CACHE STRING "" FORCE) endif() add_definitions(-DSINGLETHREADED) -- cgit v1.2.3