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Add definition of __warn_unused_result__ attribute. It will be used in the

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@188689 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jakub Staszak 2013-08-19 19:02:33 +00:00
parent 2b762cc75d
commit 630d175667
1 changed files with 6 additions and 0 deletions
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6
include/llvm/Support/Compiler.h
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@ -179,6 +179,12 @@
#define LLVM_ATTRIBUTE_USED
#endif
#if __has_attribute(warn_unused_result) || __GNUC_PREREQ(3, 4)
#define LLVM_ATTRIBUTE_UNUSED_RESULT __attribute__((__warn_unused_result__))
#else
#define LLVM_ATTRIBUTE_UNUSED_RESULT
#endif
// Some compilers warn about unused functions. When a function is sometimes
// used or not depending on build settings (e.g. a function only called from
// within "assert"), this attribute can be used to suppress such warnings.