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Check asm goto support with AC_LINK_IFELSE (#13716)

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The '__asm__ goto' support is properly recognized by a simpler linking
check instead of a run check for easier cross-compilation. The
compile only check (AC_COMPILE_IFELSE) might produce false positives
results with certain compiler options.
This commit is contained in:
Peter Kokot
2024-03-15 06:44:27 +01:00
committed by GitHub
parent ec394cc26a
commit d2eb3e54ea
1 changed files with 4 additions and 19 deletions
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23
configure.ac
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@@ -744,9 +744,8 @@ if test "$ac_cv_func___crc32d" = "yes"; then
fi
dnl Check for asm goto support.
AC_CACHE_CHECK([for asm goto], ac_cv__asm_goto,
[AC_RUN_IFELSE([AC_LANG_SOURCE([[
int main(void) {
AC_CACHE_CHECK([for asm goto], [ac_cv__asm_goto],
[AC_LINK_IFELSE([AC_LANG_PROGRAM([], [[
#if defined(__x86_64__) || defined(__i386__)
__asm__ goto("jmp %l0\n" :::: end);
#elif defined(__aarch64__)
@@ -754,23 +753,9 @@ int main(void) {
#endif
end:
return 0;
}
]])], [ac_cv__asm_goto=yes], [ac_cv__asm_goto=no], [
AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
int main(void) {
#if defined(__x86_64__) || defined(__i386__)
__asm__ goto("jmp %l0\n" :::: end);
#elif defined(__aarch64__)
__asm__ goto("b %l0\n" :::: end);
#endif
end:
return 0;
}
]])], [ac_cv__asm_goto=yes], [ac_cv__asm_goto=no])
])])
]])], [ac_cv__asm_goto=yes], [ac_cv__asm_goto=no])])
if test "$ac_cv__asm_goto" = yes; then
AC_DEFINE(HAVE_ASM_GOTO,1,[Define if asm goto support])
AC_DEFINE([HAVE_ASM_GOTO], [1], [Define if asm goto support is available.])
fi
dnl Check valgrind support.