diff options
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac index d14788b0d5..28fdfefbbc 100644 --- a/configure.ac +++ b/configure.ac @@ -348,6 +348,14 @@ AS_IF([test "$GCC" = yes -a "$gcc_major" -lt 3 ], [ AC_MSG_ERROR([too old GCC]) ]) + +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_PROG_GNU_LD RUBY_CPPOUTFILE |