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Don't use __builtin_setjmp on aarch64 MinGW/Windows #48

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Don't use __builtin_setjmp on aarch64 MinGW/Windows #48

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13 changes: 9 additions & 4 deletions src/include/c.h
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Original file line number Diff line number Diff line change
Expand Up @@ -1525,18 +1525,23 @@ typedef struct pg_signal_info
* When there is no sigsetjmp, its functionality is provided by plain
* setjmp. We now support the case only on Windows. However, it seems
* that MinGW-64 has some longstanding issues in its setjmp support,
* so on that toolchain we cheat and use gcc's builtins.
* so on that toolchain we cheat and use gcc's builtins. That workaround
* only applies to x86_64 MinGW: on aarch64 (ARM64) MinGW toolchains
* clang does not implement __builtin_setjmp/__builtin_longjmp at all
* ("__builtin_setjmp is not supported for the current target"), and its
* prototype takes a void ** rather than PostgreSQL's sigjmp_buf, so fall
* back to plain setjmp there.
*/
#ifdef WIN32
#ifdef __MINGW64__
#if defined(__MINGW64__) && !defined(__aarch64__)
typedef intptr_t sigjmp_buf[5];
#define sigsetjmp(x,y) __builtin_setjmp(x)
#define siglongjmp __builtin_longjmp
#else /* !__MINGW64__ */
#else /* !__MINGW64__ || __aarch64__ */
#define sigjmp_buf jmp_buf
#define sigsetjmp(x,y) setjmp(x)
#define siglongjmp longjmp
#endif /* __MINGW64__ */
#endif /* __MINGW64__ && !__aarch64__ */
#endif /* WIN32 */

/* /port compatibility functions */
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