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configure.in: get rid of clang fatal error

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* configure.in (ac_cv_func___builtin_setjmp): get rid of a bug in
  clang 3.3 and 3.4, which __builtin_setjmp() causes fatal error
  in backend, linker error, or segmentation fault.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@45515 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
nobu 2014-04-04 02:37:27 +00:00
parent d41af17d37
commit 9dd0113023
1 changed files with 4 additions and 3 deletions
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7
configure.in
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@ -2080,15 +2080,16 @@ fi
AC_CACHE_CHECK(for __builtin_setjmp, ac_cv_func___builtin_setjmp, AC_CACHE_CHECK(for __builtin_setjmp, ac_cv_func___builtin_setjmp,
[ [
ac_cv_func___builtin_setjmp=no ac_cv_func___builtin_setjmp=no
for cast in "" "(void *)"; do for cast in "" "(void **)"; do
RUBY_WERROR_FLAG( RUBY_WERROR_FLAG(
[AC_TRY_LINK([@%:@include <setjmp.h> [AC_TRY_LINK([@%:@include <setjmp.h>
@%:@include <stdio.h> @%:@include <stdio.h>
jmp_buf jb; jmp_buf jb;
void t(void) {__builtin_longjmp($cast jb, 1);}], void t(void) {__builtin_longjmp($cast jb, 1);}
int jump(void) {(void)(__builtin_setjmp($cast jb) ? 1 : 0); return 0;}],
[ [
void (*volatile f)(void) = t; void (*volatile f)(void) = t;
if (!__builtin_setjmp($cast jb)) printf("%d\n", f != 0); if (!jump()) printf("%d\n", f != 0);
], ],
[ac_cv_func___builtin_setjmp="yes with cast ($cast)"]) [ac_cv_func___builtin_setjmp="yes with cast ($cast)"])
]) ])