[llvm_cv_cxx_visibility_inlines_hidden],
[ AC_LANG_PUSH([C++])
oldcxxflags="$CXXFLAGS"
- CXXFLAGS="$CXXFLAGS -fvisibility-inlines-hidden -Werror"
+ CXXFLAGS="$CXXFLAGS -O0 -fvisibility-inlines-hidden -Werror"
AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
[template <typename T> struct X { void __attribute__((noinline)) f() {} };],
[X<int>().f();])],