MdePkg Base.h: Add definition for CLANG9 tool chain
BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=1603 CLANG9 tool chain defines __clang__ macro only, doesn't define __GNUC__ macro. But, it uses some same definitions with GCC. So, update base definition for CLANG9 tool chain. Signed-off-by: Liming Gao <liming.gao@intel.com> Cc: Michael Kinney <michael.d.kinney@intel.com> Reviewed-by: Philippe Mathieu-Daude <philmd@redhat.com> Reviewed-by: Michael D Kinney <michael.d.kinney@intel.com>
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@@ -621,9 +621,9 @@ typedef char* VA_LIST;
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#define VA_END(Marker) (Marker = (VA_LIST) 0)
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#define VA_COPY(Dest, Start) ((void)((Dest) = (Start)))
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#elif defined(__GNUC__)
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#elif defined(__GNUC__) || defined(__clang__)
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#if defined(MDE_CPU_X64) && !defined(NO_MSABI_VA_FUNCS)
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#if defined(MDE_CPU_X64) && !defined(NO_MSABI_VA_FUNCS) && !defined(__clang__)
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//
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// X64 only. Use MS ABI version of GCC built-in macros for variable argument lists.
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//
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@@ -1274,7 +1274,7 @@ typedef UINTN RETURN_STATUS;
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**/
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#define RETURN_ADDRESS(L) ((L == 0) ? _ReturnAddress() : (VOID *) 0)
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#elif defined(__GNUC__)
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#elif defined (__GNUC__) || defined (__clang__)
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void * __builtin_return_address (unsigned int level);
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/**
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Get the return address of the calling function.
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