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configure: always check for atomic/sync builtins [Bug #17787]
Non-gcc compilers tend to have this intrinsic these days, e.g. xlc has `__sync` builtins.
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2021-04-10 16:05:23 +09:00
1 changed files with 3 additions and 1 deletions
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@ -1549,7 +1549,9 @@ AS_IF([test "$GCC" = yes], [
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AC_DEFINE_UNQUOTED([RUBY_ALIAS_FUNCTION_VOID(prot, name, args)],
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[RUBY_ALIAS_FUNCTION_TYPE(void, prot, name, args)])
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])
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])
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{
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AC_CACHE_CHECK([for __atomic builtins], [rb_cv_gcc_atomic_builtins], [
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AC_LINK_IFELSE([AC_LANG_PROGRAM([[unsigned int atomic_var;]],
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[[
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@ -1580,7 +1582,6 @@ AS_IF([test "$GCC" = yes], [
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AS_IF([test "$rb_cv_gcc_sync_builtins" = yes], [
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AC_DEFINE(HAVE_GCC_SYNC_BUILTINS)
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])
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])
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AC_CACHE_CHECK(for __builtin_unreachable, rb_cv_func___builtin_unreachable,
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[RUBY_WERROR_FLAG(
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@ -1593,6 +1594,7 @@ AS_IF([test "$GCC" = yes], [
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AS_IF([test "$rb_cv_func___builtin_unreachable" = yes], [
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AC_DEFINE_UNQUOTED(UNREACHABLE, [__builtin_unreachable()])
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])
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}
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AC_CACHE_CHECK(for exported function attribute, rb_cv_func_exported, [
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rb_cv_func_exported=no
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