diff options
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac index fcae66f775..0bc6a7ae0e 100644 --- a/configure.ac +++ b/configure.ac @@ -2530,6 +2530,13 @@ AS_IF([test "${universal_binary-no}" = yes ], [ ], [ AC_DEFINE_UNQUOTED(STACK_GROW_DIRECTION, $stack_dir) ]) + + AC_CACHE_CHECK([if thread-local storage is supported], [rb_cv_tls_supported], + [AC_LINK_IFELSE([AC_LANG_PROGRAM([[int __thread conftest;]])], + [rb_cv_tls_supported=yes], + [rb_cv_tls_supported=no])]) + AS_IF([test x"$rb_cv_tls_supported" != xyes], + [AC_DEFINE(RB_THREAD_LOCAL_SPECIFIER_IS_UNSUPPORTED)]) ], [ RUBY_STACK_GROW_DIRECTION($target_cpu, dir) AC_DEFINE_UNQUOTED(STACK_GROW_DIRECTION, $dir) |