The following forces the g++.dg/torture/pr106922.C testcase to use the C++11 libstdc++ ABI and checks if that was successful.
Does this look OK? Thanks, Richard. * g++.dg/uninit-pr106722-2.C: Force _GLIBCXX_USE_CXX11_ABI to 1. --- gcc/testsuite/g++.dg/torture/pr106922.C | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/gcc/testsuite/g++.dg/torture/pr106922.C b/gcc/testsuite/g++.dg/torture/pr106922.C index 046fc6cce76..4b692d621ea 100644 --- a/gcc/testsuite/g++.dg/torture/pr106922.C +++ b/gcc/testsuite/g++.dg/torture/pr106922.C @@ -4,8 +4,16 @@ // -O1 doesn't iterate VN and thus has bogus uninit diagnostics // { dg-skip-if "" { *-*-* } { "-O1" } { "" } } +// The testcase still emits bogus diagnostics with the pre-C++11 ABI +#undef _GLIBCXX_USE_CXX11_ABI +#define _GLIBCXX_USE_CXX11_ABI 1 + #include <vector> +// When the library is not dual-ABI and defaults to old just compile +// and empty TU +#if _GLIBCXX_USE_CXX11_ABI + #include <optional> template <class T> using Optional = std::optional<T>; @@ -46,3 +54,4 @@ void test() externals.external2 = internal2; } } +#endif -- 2.35.3