diff options
Diffstat (limited to 'configure.in')
-rw-r--r-- | configure.in | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/configure.in b/configure.in index 7afaea97f3..9456da1e07 100644 --- a/configure.in +++ b/configure.in @@ -753,6 +753,19 @@ if test "$GCC" = yes; then fi fi +AC_CACHE_CHECK(for exported function attribute, rb_cv_func_exported, [ +rb_cv_func_exported=no +RUBY_WERROR_FLAG([ +for mac in '__attribute__ ((visibility("default")))' '__declspec(dllexport)'; do + AC_TRY_COMPILE([@%:@define RUBY_FUNC_EXPORTED $mac extern + RUBY_FUNC_EXPORTED void conftest_attribute_check(void);], [], + [rb_cv_func_exported="$mac"; break]) +done +])]) +if test "$rb_cv_func_exported" != no; then + AC_DEFINE_UNQUOTED(RUBY_FUNC_EXPORTED, [$rb_cv_func_exported extern]) +fi + RUBY_APPEND_OPTION(XCFLAGS, -DRUBY_EXPORT) dnl } |