https://bugs.llvm.org/show_bug.cgi?id=48489
Bug ID: 48489
Summary: __builtin___clear_cache() has a different prototype
than GCC
Product: clang
Version: unspecified
Hardware: All
OS: All
Status: NEW
Severity: normal
Priority: P
Component: C
Assignee: unassignedclangb...@nondot.org
Reporter: alx.manpa...@gmail.com
CC: blitzrak...@gmail.com, dgre...@apple.com,
erik.pilking...@gmail.com, llvm-bugs@lists.llvm.org,
richard-l...@metafoo.co.uk
GCC provides:
void __builtin___clear_cache(void *begin, void *end);
See: https://gcc.gnu.org/onlinedocs/gcc/Other-Builtins.html
Clang provides:
void __builtin___clear_cache(char *begin, char *end);
I think GCC used char *' in the past, and moved to 'void *', but I'm not sure
about this. Please, use the same prototype that GCC uses, for compatibility
reasons.
I don't know much about internals of Clang/LLVM, but the only source I could
find that defines the types for the prototype is:
https://github.com/llvm/llvm-project/blob/7faf62a80bfc3a9dfe34133681fcc31f8e8d658b/clang/include/clang/Basic/Builtins.def#L583
If you can confirm that, or tell me which other sources need to be modified,
I'll be happy to submit a patch.
And a reminder to myself when this bug is closed: Update cacheflush(2) manual
page.
Related linux-man@ thread:
https://lore.kernel.org/linux-man/747d56e0-c102-ab40-add4-530a48a43...@gmx.de/T/#t
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