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| author | Justin Bogner <mail@justinbogner.com> | 2016-08-31 23:43:14 +0000 |
|---|---|---|
| committer | Justin Bogner <mail@justinbogner.com> | 2016-08-31 23:43:14 +0000 |
| commit | f1382fc71eef026f20608e1e8e5633ef6b428a96 (patch) | |
| tree | 4782f3faa638e2bfcdfc0d3f5c0ea8acce27218b | |
| parent | f3e82f14181655e6e8ccac1212da888f4d83a367 (diff) | |
| download | bcm5719-llvm-f1382fc71eef026f20608e1e8e5633ef6b428a96.tar.gz bcm5719-llvm-f1382fc71eef026f20608e1e8e5633ef6b428a96.zip | |
Support: Avoid errors with LLVM_FALLTHROUGH in clang 3.6 and below in C mode
Older versions of clang defined __has_cpp_attribute in C mode, but
would choke on scoped attributes, as per llvm.org/PR23435. Since we
support building with clang all the way back to 3.1, we have to work
around this issue.
llvm-svn: 280326
| -rw-r--r-- | llvm/include/llvm/Support/Compiler.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/llvm/include/llvm/Support/Compiler.h b/llvm/include/llvm/Support/Compiler.h index a9b2e433a76..3cf99102faf 100644 --- a/llvm/include/llvm/Support/Compiler.h +++ b/llvm/include/llvm/Support/Compiler.h @@ -235,6 +235,10 @@ /// LLVM_FALLTHROUGH - Mark fallthrough cases in switch statements. #if __cplusplus > 201402L && __has_cpp_attribute(fallthrough) #define LLVM_FALLTHROUGH [[fallthrough]] +#elif !__cplusplus +// Workaround for llvm.org/PR23435, since clang 3.6 and below emit a spurious +// error when __has_cpp_attribute is given a scoped attribute in C mode. +#define LLVM_FALLTHROUGH #elif __has_cpp_attribute(clang::fallthrough) #define LLVM_FALLTHROUGH [[clang::fallthrough]] #else |
