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MdePkg RVCT: add definition of UNREACHABLE

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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>
This commit is contained in:
Ard Biesheuvel
2016-08-11 20:13:31 +02:00
parent d977ba4406
commit 82df618711
1 changed files with 7 additions and 0 deletions
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7
MdePkg/Include/Arm/ProcessorBind.h
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@@ -28,6 +28,13 @@
#pragma pack() #pragma pack()
#endif #endif
//
// RVCT does not support the __builtin_unreachable() macro
//
#ifdef __ARMCC_VERSION
#define UNREACHABLE()
#endif
#if _MSC_EXTENSIONS #if _MSC_EXTENSIONS
// //
// use Microsoft* C complier dependent integer width types // use Microsoft* C complier dependent integer width types