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Features: Fix C90 feature detection.

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This bug caused c_function_prototypes to not be recorded at configure
time when compiling with -std=gnu99 or similar. In the case of feature
recording, that was not a problem, because the logic in
CMakeDetermineCompileFeatures.cmake currently assumes that a feature
present for an earlier standard is present for a later standard.

However, the detection strings are also used in WriteCompilerDetectionHeader,
so the feature macro has been defined to '0' when using a later language
dialect.

Fix that by not checking the existence of the __STDC_VERSION__ macro at
all when detecting C90 features.
This commit is contained in:
Stephen Kelly
2015-02-03 21:47:45 +01:00
committed by Brad King
parent 6027798a30
commit fb3487a997
8 changed files with 153 additions and 3 deletions
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29
Tests/Module/WriteCompilerDetectionHeader/main.c Normal file
View File

@@ -0,0 +1,29 @@
#include "test_compiler_detection.h"
#if !defined(TEST_COMPILER_C_FUNCTION_PROTOTYPES) || !TEST_COMPILER_C_FUNCTION_PROTOTYPES
# error Expected TEST_COMPILER_C_FUNCTION_PROTOTYPES
#endif
#if !EXPECTED_COMPILER_C_FUNCTION_PROTOTYPES
# error Expected EXPECTED_COMPILER_C_FUNCTION_PROTOTYPES
#endif
#if !defined(TEST_COMPILER_C_RESTRICT) || !TEST_COMPILER_C_RESTRICT
# if EXPECTED_COMPILER_C_RESTRICT
# error Expected TEST_COMPILER_C_RESTRICT
# endif
#else
# if !EXPECTED_COMPILER_C_RESTRICT
# error Expect no TEST_COMPILER_C_RESTRICT
# endif
#endif
#ifdef TEST_COMPILER_CXX_STATIC_ASSERT
#error Expect no CXX features defined
#endif
int main()
{
return 0;
}