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| author | Jose Fonseca <jfonseca@vmware.com> | 2015-12-10 10:57:12 +0000 |
|---|---|---|
| committer | Jose Fonseca <jfonseca@vmware.com> | 2015-12-11 06:37:36 +0000 |
| commit | d34b3f7719172dd191193a8abd561847635b35a8 (patch) | |
| tree | 3088be6841c644acab15af6f869c9c4a17560e08 /CMakeLists.txt | |
| parent | 5b106419d0eb822018f9dd47ea1ab46d89f15bc9 (diff) | |
cmake: Target C99.
GCC 5.x and 4.x have different defaults, so it's better to explicitly
specify the target C standard to keep builds consistent.
Reviewed-by: Roland Scheidegger <sroland@vmware.com>
Diffstat (limited to 'CMakeLists.txt')
| -rw-r--r-- | CMakeLists.txt | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/CMakeLists.txt b/CMakeLists.txt index 4df0202db..2da1e6f74 100644 --- a/CMakeLists.txt +++ b/CMakeLists.txt @@ -224,6 +224,12 @@ if (NOT MSVC) SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall") ENDIF (CXX_COMPILER_FLAG_WALL) + # Target C99. GCC's default is gnu11 for 5.0 and newer, gnu89 for + # older versions. + check_c_compiler_flag ("-std=gnu99" C_COMPILER_FLAG_STD_GNU99) + if (C_COMPILER_FLAG_STD_GNU99) + set (CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -std=gnu99") + endif () # MSVC does not support C99 variable length arrays CHECK_C_COMPILER_FLAG("-Werror=vla" C_COMPILER_FLAG_WEVLA) IF (C_COMPILER_FLAG_WEVLA) |