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Document that -O3 is still a bad idea for gcc-12

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Marcus Holland-Moritz 2023-07-09 17:47:16 +02:00
parent 6fe8b393a8
commit 28d5de33e6
1 changed files with 1 additions and 0 deletions
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CMakeLists.txt
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@ -84,6 +84,7 @@ endif()
if("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU") if("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
add_compile_options(-fdiagnostics-color=always) add_compile_options(-fdiagnostics-color=always)
# For gcc, -O3 is *much* worse than -O2 # For gcc, -O3 is *much* worse than -O2
# Update: This is still true for gcc-12
set(CMAKE_C_FLAGS_RELEASE "-DNDEBUG -O2 -g") set(CMAKE_C_FLAGS_RELEASE "-DNDEBUG -O2 -g")
set(CMAKE_CXX_FLAGS_RELEASE "-DNDEBUG -O2 -g") set(CMAKE_CXX_FLAGS_RELEASE "-DNDEBUG -O2 -g")
elseif("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang") elseif("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")