24037c37b6
Clang already supports the pragma prefixed by "GCC" or "clang". MSVC has more recently added support for the pragma, but without any prefix; see https://devblogs.microsoft.com/cppblog/broken-warnings-theory/#external-headers Differential revision: https://reviews.llvm.org/D104770
20 lines
451 B
C
20 lines
451 B
C
#if defined(CLANG)
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#pragma clang system_header
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// expected-no-diagnostics
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#elif defined(GCC)
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#pragma GCC system_header
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// expected-no-diagnostics
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#elif defined(MS)
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#pragma system_header
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// expected-no-diagnostics
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#else
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// expected-warning@+1{{unknown pragma ignored}}
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#pragma system_header
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// expected-note@+4{{previous definition is here}}
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// expected-warning@+4{{redefinition of typedef 'x' is a C11 feature}}
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#endif
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typedef int x;
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typedef int x;
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