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[libc++] Fix extern C for __sanitizer_annotate_contiguous_container() (for gcc) 

gcc supports it only at the beginning:

    $ g++ -o /dev/null -c /tmp/test_extern.cpp
    $ cat /tmp/test_extern.cpp
    extern "C" __attribute__ ((__visibility__("default"))) int foo();

Otherwise:

    $ g++ -o /dev/null -c /tmp/test_extern.cpp
    /tmp/test_extern.cpp:1:52: error: expected unqualified-id before string constant
        1 | __attribute__ ((__visibility__("default"))) extern "C" int foo();
          |                                                    ^~~
    $ cat /tmp/test_extern.cpp
    __attribute__ ((__visibility__("default"))) extern "C" int foo();

Reviewed By: #libc, ldionne

Differential Revision: https://reviews.llvm.org/D93316
This commit is contained in:
Azat Khuzhin 2020-12-17 16:19:50 -05:00 committed by Louis Dionne
parent f710bb7063
commit 6340f890bb
1 changed files with 1 additions and 1 deletions
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2
libcxx/include/__config
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@ -1082,7 +1082,7 @@ typedef unsigned int char32_t;
#endif
#ifndef _LIBCPP_HAS_NO_ASAN
_LIBCPP_FUNC_VIS extern "C" void __sanitizer_annotate_contiguous_container(
extern "C" _LIBCPP_FUNC_VIS void __sanitizer_annotate_contiguous_container(
const void *, const void *, const void *, const void *);
#endif