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configure: always check for atomic/sync builtins [Bug #17787]

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Non-gcc compilers tend to have this intrinsic these days, e.g. xlc
has `__sync` builtins.
This commit is contained in:
Nobuyoshi Nakada 2021-04-09 17:51:31 +09:00
parent 8b7cab70eb
commit 4a6c7f8696
Notes: git 2021-04-10 16:05:23 +09:00 
Merged: https://github.com/ruby/ruby/pull/4372
1 changed files with 3 additions and 1 deletions
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4
configure.ac
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@ -1549,7 +1549,9 @@ AS_IF([test "$GCC" = yes], [
AC_DEFINE_UNQUOTED([RUBY_ALIAS_FUNCTION_VOID(prot, name, args)], AC_DEFINE_UNQUOTED([RUBY_ALIAS_FUNCTION_VOID(prot, name, args)],
[RUBY_ALIAS_FUNCTION_TYPE(void, prot, name, args)]) [RUBY_ALIAS_FUNCTION_TYPE(void, prot, name, args)])
]) ])
])
{
AC_CACHE_CHECK([for __atomic builtins], [rb_cv_gcc_atomic_builtins], [ AC_CACHE_CHECK([for __atomic builtins], [rb_cv_gcc_atomic_builtins], [
AC_LINK_IFELSE([AC_LANG_PROGRAM([[unsigned int atomic_var;]], AC_LINK_IFELSE([AC_LANG_PROGRAM([[unsigned int atomic_var;]],
[[ [[
@ -1580,7 +1582,6 @@ AS_IF([test "$GCC" = yes], [
AS_IF([test "$rb_cv_gcc_sync_builtins" = yes], [ AS_IF([test "$rb_cv_gcc_sync_builtins" = yes], [
AC_DEFINE(HAVE_GCC_SYNC_BUILTINS) AC_DEFINE(HAVE_GCC_SYNC_BUILTINS)
]) ])
])
AC_CACHE_CHECK(for __builtin_unreachable, rb_cv_func___builtin_unreachable, AC_CACHE_CHECK(for __builtin_unreachable, rb_cv_func___builtin_unreachable,
[RUBY_WERROR_FLAG( [RUBY_WERROR_FLAG(
@ -1593,6 +1594,7 @@ AS_IF([test "$GCC" = yes], [
AS_IF([test "$rb_cv_func___builtin_unreachable" = yes], [ AS_IF([test "$rb_cv_func___builtin_unreachable" = yes], [
AC_DEFINE_UNQUOTED(UNREACHABLE, [__builtin_unreachable()]) AC_DEFINE_UNQUOTED(UNREACHABLE, [__builtin_unreachable()])
]) ])
}
AC_CACHE_CHECK(for exported function attribute, rb_cv_func_exported, [ AC_CACHE_CHECK(for exported function attribute, rb_cv_func_exported, [
rb_cv_func_exported=no rb_cv_func_exported=no