https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98232
--- Comment #4 from Hussam Al-Tayeb <ht990332 at gmx dot com> --- (In reply to Martin Liška from comment #3) > Run build system with in a verbose mode (V=1 or VERBOSE=1), or so. > And then for the problematic TU do -E, which will save pre-processed source > file instead of the object file. Can you please tell me what to type for -E? And what is a TU?