vasilito
5a441d5a1c
relibc already exports both -- nm libc.a shows 'T _setjmp' and
'T _longjmp' as aliases of setjmp/longjmp -- but setjmp.h never declared
them, so callers got an implicit declaration. GCC 14+ makes that an
error:
lua-5.4.4/src/ldo.c:66: error: implicit declaration of function
'_longjmp'; did you mean 'longjmp'?
which broke wireplumber, since it bundles Lua and Lua uses them under
LUA_USE_POSIX.
The difference between the two forms is whether the signal mask is
saved; relibc's implementation saves it in neither, so exporting them as
aliases is accurate rather than a convenience.
48 lines
1.2 KiB
C
48 lines
1.2 KiB
C
#ifndef _SETJMP_H
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#define _SETJMP_H
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#ifdef __aarch64__
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typedef unsigned long long jmp_buf[22];
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#endif
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#ifdef __i386__
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typedef unsigned long long jmp_buf[6];
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#endif
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#ifdef __x86_64__
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typedef unsigned long long jmp_buf[16];
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#endif
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#ifdef __riscv
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typedef unsigned long long jmp_buf[26];
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#endif
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typedef jmp_buf sigjmp_buf;
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#ifdef __cplusplus
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extern "C" {
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#endif
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int setjmp(jmp_buf buf);
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void longjmp(jmp_buf buf, int value);
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int sigsetjmp(jmp_buf buf, int savemask);
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int siglongjmp(jmp_buf buf, int savemask);
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/* POSIX _setjmp/_longjmp. relibc already EXPORTS both -- `nm libc.a` shows
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`T _setjmp` and `T _longjmp` as aliases of setjmp/longjmp -- they were
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simply never declared here, so callers got an implicit declaration, which
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GCC 14+ makes an error:
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lua-5.4.4/src/ldo.c:66: error: implicit declaration of function
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'_longjmp'; did you mean 'longjmp'?
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(wireplumber bundles Lua, which uses them under LUA_USE_POSIX.)
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The distinction from setjmp/longjmp is the signal mask, which relibc's
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implementation does not save in either form, so the alias is accurate. */
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int _setjmp(jmp_buf buf);
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void _longjmp(jmp_buf buf, int value);
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#ifdef __cplusplus
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} // extern "C"
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#endif
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#endif /* _SETJMP_H */
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