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libcxxabi: declare __gnu_unwind_frame in cxa_personality (#189787)

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ARM EHABI builds of libcxxabi fail with clang-22+ because
cxa_personality.cpp calls __gnu_unwind_frame without a visible
declaration, triggering:

  error: use of undeclared identifier '__gnu_unwind_frame'

Add an extern "C" forward declaration before the EHABI unwind helper so
the source compiles correctly.

Signed-off-by: Khem Raj <khem.raj@oss.qualcomm.com>
This commit is contained in:
Khem Raj
2026-04-27 00:35:24 -07:00
committed by GitHub
parent 58f2c189c4
commit 8119f18549
1 changed files with 2 additions and 0 deletions
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libcxxabi/src/cxa_personality.cpp
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@@ -1116,6 +1116,8 @@ __gxx_personality_seh0(PEXCEPTION_RECORD ms_exc, void *this_frame,
#else #else
extern "C" _Unwind_Reason_Code __gnu_unwind_frame(_Unwind_Exception*, _Unwind_Context*);
// Helper function to unwind one frame. // Helper function to unwind one frame.
// ARM EHABI 7.3 and 7.4: If the personality function returns _URC_CONTINUE_UNWIND, the // ARM EHABI 7.3 and 7.4: If the personality function returns _URC_CONTINUE_UNWIND, the
// personality routine should update the virtual register set (VRS) according to the // personality routine should update the virtual register set (VRS) according to the