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MdePkg Base.h: Delete prototype for __builtin_return_address 

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=1004

Being a compiler builtin, the type of __builtin_return_address is
already known to the compiler so no prototype is needed. Clang also
errors out when redeclaring certain builtins like this[1], though
currently only for ones with custom type checking. At the moment,
__builtin_return_address does not use custom type checking and so does
not trigger this error, however, the CHERI fork of LLVM, which will form
the basis of the toolchain for Arm's experimental Morello platform, does
use custom type checking for it, and so gives an error. Thus, simply
delete the unnecessary line.

[1] llvm/llvm-project@41af971375

Cc: Leif Lindholm <leif@nuviainc.com>
Signed-off-by: Jessica Clarke <jrtc27@jrtc27.com>
Reviewed-by: Liming Gao <liming.gao@intel.com>
Reviewed-by: Zhiguang Liu <zhiguang.liu@intel.com>
Reviewed-by: Leif Lindholm <leif@nuviainc.com>
This commit is contained in:
Jessica Clarke 2020-07-27 09:58:50 +08:00 committed by mergify[bot]
parent 6074f57e5b
commit a44f558a84
1 changed files with 0 additions and 1 deletions
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MdePkg/Include/Base.h
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@ -1273,7 +1273,6 @@ typedef UINTN RETURN_STATUS;
**/
#define RETURN_ADDRESS(L) ((L == 0) ? _ReturnAddress() : (VOID *) 0)
#elif defined (__GNUC__) || defined (__clang__)
void * __builtin_return_address (unsigned int level);
/**
Get the return address of the calling function.