MdePkg RVCT: add definition of UNREACHABLE
The RVCT compiler in --gnu mode appears to simply strip of the __builtin
prefix when it encounters calls to __builtin_xxx() functions, and so
the __builtin_unreachable() we emit for GCC results in linker errors
regarding undefined references against 'unreachable()'.
So define UNREACHABLE() to a NOP instead.
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Reviewed-by: Liming Gao <liming.gao@intel.com>
diff --git a/MdePkg/Include/Arm/ProcessorBind.h b/MdePkg/Include/Arm/ProcessorBind.h
index c2482c2..5ee7465 100644
--- a/MdePkg/Include/Arm/ProcessorBind.h
+++ b/MdePkg/Include/Arm/ProcessorBind.h
@@ -28,6 +28,13 @@
#pragma pack()
#endif
+//
+// RVCT does not support the __builtin_unreachable() macro
+//
+#ifdef __ARMCC_VERSION
+#define UNREACHABLE()
+#endif
+
#if _MSC_EXTENSIONS
//
// use Microsoft* C complier dependent integer width types
