[PATCH] Allow clang to build __clear_cache on ARM

[Andrew Turner]

Hello,

I have attached a patch to allow clang to build the compiler-rt
__clear_cache function on ARM.

The problem is, when targeting ARM, clang thinks it is a builtin with no
external definition. This is incorrect as clang generates a call to the
__clear_cache function.

The change I have made is to add a runtime library function attribute
to the builtin function list. With the attached patch I am able to
build a version of compiler-rt for FreeBSD/ARM that includes
__clear_cache.

Andrew
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