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XL/XLClang: Fix detection of C++ 14 mode on Linux

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This compiler does not always define `__cplusplus` correctly, but does
define a feature macro that we can use to distinguish this mode.
This commit is contained in:
Brad King
2024-04-03 14:26:18 -04:00
parent 863cde8c19
commit 3587579f34
2 changed files with 12 additions and 0 deletions
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6
Tests/CompileFeatures/default_dialect.cpp
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@@ -35,6 +35,12 @@ struct Outputter;
# else
# define CXX_STD __cplusplus
# endif
#elif (defined(__IBMCPP__) || defined(__ibmxl__)) && defined(__linux__)
# if __cplusplus == CXX_STD_11 && defined(__cpp_aggregate_nsdmi)
# define CXX_STD CXX_STD_14
# else
# define CXX_STD __cplusplus
# endif
#else
# define CXX_STD __cplusplus
#endif