On Fri, 9 May 2025 at 11:19, Jonathan Wakely <jwak...@redhat.com> wrote: > > On Thu, 8 May 2025 at 20:56, Jason Merrill <ja...@redhat.com> wrote: > > > > Tested x86_64-pc-linux-gnu. Does this make sense for trunk? > > Yes, it looks useful. I'm going to test it with my "very -std and -m32 > and old-string ABI" test settings to be sure it doesn't cause any > problems.
There are a few failures when using GLIBCXX_TESTSUITE_STDS=20 to run tests as C++20 or later: FAIL: experimental/net/internet/resolver/ops/lookup.cc -std=gnu++23 (test for excess errors) Excess errors: /tmp/build/x86_64-pc-linux-gnu/libstdc++-v3/include/experimental/internet:2100: warning: offset of 'std::experimental::net::v1::ip::basic_resolver<std::experimental::net::v1::ip::tcp>::_M_ctx' for '-std=c++20' and up changes in '-fabi-version=21' (GCC 16) [-Wabi] FAIL: experimental/optional/requirements.cc -std=gnu++20 (test for excess errors) Excess errors: /home/test/src/gcc/libstdc++-v3/testsuite/experimental/optional/requirements.cc:80: warning: offset of 'no_copy_assignment::__as_base ' base class for '-std=c++20' and up changes in '-fabi-version=21' (GCC 16) [-Wabi] /home/test/src/gcc/libstdc++-v3/testsuite/experimental/optional/requirements.cc:81: warning: offset of 'no_move_assignment::__as_base ' base class for '-std=c++20' and up changes in '-fabi-version=21' (GCC 16) [-Wabi] They're all in <experimental/xxx> headers, and nothing that's exported from the shared lib. I'll look into them.
