It looks like OpenBSD's cmake port patches cmake to remove the use of
-O2 in Release and RelWithDebInfo builds -
/usr/ports/devel/cmake/patches/patch-Modules_Compiler_GNU_cmake has:
- string(APPEND CMAKE_${lang}_FLAGS_MINSIZEREL_INIT " -Os -DNDEBUG")
- string(APPEND CMAKE_${lang}_FLAGS_RELEASE_INIT " -O3 -DNDEBUG")
- string(APPEND CMAKE_${lang}_FLAGS_RELWITHDEBINFO_INIT " -O2 -g -DNDEBUG")
+ string(APPEND CMAKE_${lang}_FLAGS_MINSIZEREL_INIT " -DNDEBUG")
+ string(APPEND CMAKE_${lang}_FLAGS_RELEASE_INIT " -DNDEBUG")
+ string(APPEND CMAKE_${lang}_FLAGS_RELWITHDEBINFO_INIT " -g -DNDEBUG")
Does anyone know why things are patched in this way?
[I think one can force optimisation with (for example):
cmake -DCMAKE_CXX_FLAGS_RELWITHDEBINFO="-O2 -g -DNDEBUG" ...
]
Thanks,
- Jules
--
http://op59.net
