diff options
| author | nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2014-04-25 05:56:01 +0000 |
|---|---|---|
| committer | nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2014-04-25 05:56:01 +0000 |
| commit | e4cde46942a8ea64444a503e1ded944e41ded231 (patch) | |
| tree | a9aa9bdbe516502cd6e3048edfd822ba34faa47a /configure.in | |
| parent | b4682ea330e0aeaf3c26c3f39eb9685155d983f0 (diff) | |
configure.in: refine __builtin_unreachable check
* configure.in (rb_cv_func___builtin_unreachable): try with an
external variable not only by a warning, which might not be
shown due to the optimization. [ruby-core:61647] [Bug #9665]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@45716 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'configure.in')
| -rw-r--r-- | configure.in | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/configure.in b/configure.in index 23dd321df0..45f82674f6 100644 --- a/configure.in +++ b/configure.in @@ -1595,8 +1595,8 @@ if test "$GCC" = yes; then AC_CACHE_CHECK(for __builtin_unreachable, rb_cv_func___builtin_unreachable, [RUBY_WERROR_FLAG( - [AC_TRY_LINK([@%:@include <stdlib.h>], - [exit(0); __builtin_unreachable();], + [AC_TRY_LINK([volatile int zero;], + [if (zero) __builtin_unreachable();], [rb_cv_func___builtin_unreachable=yes], [rb_cv_func___builtin_unreachable=no]) ]) |