https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120514
--- Comment #5 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> --- As a followup. Thanks for the hints about what is going on. I recently upgraded from Fedora 41 to 42. The build I was attempting was a clean build, I always start with an empty build directory. I was suspicious, so I went to my install directory and deleted the 16.0.0 libexec directory contents and the bin directory. Tried the build again and got a config error that I needed a C++ compiler that supports C14. That surprised me. I checked to see what g++ version was installed. NONE!. Evidently the configure and and builds were using an older version of previously built g++. I went ahead and installed the latest g++ using dnf. Now it all works. Side note. The build time went down by about 5 minutes as well. Build of trunk complete.. real 11m44.284s user 68m55.859s sys 7m52.860s All is well. Thanks again for the feedback.
