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| author | Stephen Kelly <steveire@gmail.com> | 2015-01-11 15:20:03 (GMT) |
|---|---|---|
| committer | Stephen Kelly <steveire@gmail.com> | 2015-01-15 21:13:22 (GMT) |
| commit | 222ec86f7d9ae838d2e460b89985c797c7c90373 (patch) | |
| tree | fd036d94a0691bcc4a4e4a51e9c720b4f9dcfee9 /Modules/Compiler | |
| parent | 6e909035af73d3ee0ca3e5adef39b4541f0c8be9 (diff) | |
| download | CMake-222ec86f7d9ae838d2e460b89985c797c7c90373.zip CMake-222ec86f7d9ae838d2e460b89985c797c7c90373.tar.gz CMake-222ec86f7d9ae838d2e460b89985c797c7c90373.tar.bz2 | |
Features: Test an old value of __STDC_VERSION__ for GNU < 4.7 compatibility.
Diffstat (limited to 'Modules/Compiler')
| -rw-r--r-- | Modules/Compiler/GNU-C-FeatureTests.cmake | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/Modules/Compiler/GNU-C-FeatureTests.cmake b/Modules/Compiler/GNU-C-FeatureTests.cmake index dfaeebf..ddac0e8 100644 --- a/Modules/Compiler/GNU-C-FeatureTests.cmake +++ b/Modules/Compiler/GNU-C-FeatureTests.cmake @@ -1,7 +1,12 @@ set(_cmake_oldestSupported "(__GNUC__ * 100 + __GNUC_MINOR__) >= 407") -set(GNU46_C11 "${_cmake_oldestSupported} && defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201112L") +# GNU 4.7 correctly sets __STDC_VERSION__ to 201112L, but GNU 4.6 sets it +# to 201000L. As the former is strictly greater than the latter, test only +# for the latter. If in the future CMake learns about a C feature which was +# introduced with GNU 4.7, that should test for the correct version, similar +# to the distinction between __cplusplus and __GXX_EXPERIMENTAL_CXX0X__ tests. +set(GNU46_C11 "${_cmake_oldestSupported} && defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201000L") set(_cmake_feature_test_c_static_assert "${GNU46_C11}") # Since 4.4 at least: set(GNU44_C99 "${_cmake_oldestSupported} && defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L") |