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| author | Stephen Kelly <steveire@gmail.com> | 2014-11-24 20:47:48 (GMT) |
|---|---|---|
| committer | Stephen Kelly <steveire@gmail.com> | 2014-11-25 13:44:21 (GMT) |
| commit | d0af0faefbeca4f2821ddafe34a0b52032ee01a7 (patch) | |
| tree | bf1763623e68b6c44c6f6f5c55a629c17753d340 /Modules/Compiler/Clang-C-FeatureTests.cmake | |
| parent | 598a316154922f27f987d0f7a78b28ab78a85be6 (diff) | |
| download | CMake-d0af0faefbeca4f2821ddafe34a0b52032ee01a7.zip CMake-d0af0faefbeca4f2821ddafe34a0b52032ee01a7.tar.gz CMake-d0af0faefbeca4f2821ddafe34a0b52032ee01a7.tar.bz2 | |
WCDH: Make the header -Wundef safe for the C language.
The __STDC_VERSION__ macro may be defined or not depending on the
implementation dialect of C. Test that it is defined before testing
its value.
The CXX tests do not need such a change because they define __cplusplus
in all dialects.
Diffstat (limited to 'Modules/Compiler/Clang-C-FeatureTests.cmake')
| -rw-r--r-- | Modules/Compiler/Clang-C-FeatureTests.cmake | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/Modules/Compiler/Clang-C-FeatureTests.cmake b/Modules/Compiler/Clang-C-FeatureTests.cmake index 4a72e87..2d8673d 100644 --- a/Modules/Compiler/Clang-C-FeatureTests.cmake +++ b/Modules/Compiler/Clang-C-FeatureTests.cmake @@ -1,9 +1,9 @@ set(_cmake_oldestSupported "((__clang_major__ * 100) + __clang_minor__) >= 304") -set(Clang_C11 "${_cmake_oldestSupported} && __STDC_VERSION__ >= 201112L") +set(Clang_C11 "${_cmake_oldestSupported} && defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201112L") set(_cmake_feature_test_c_static_assert "${Clang_C11}") -set(Clang_C99 "${_cmake_oldestSupported} && __STDC_VERSION__ >= 199901L") +set(Clang_C99 "${_cmake_oldestSupported} && defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L") set(_cmake_feature_test_c_restrict "${Clang_C99}") set(_cmake_feature_test_c_variadic_macros "${Clang_C99}") |