https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82542
--- Comment #6 from joseph at codesourcery dot com <joseph at codesourcery dot com> --- glibc does not use this option. ABI checking in glibc works on binaries via objdump -T. linknamespace tests do use -aux-info to list functions exported by a header, and would find it useful to be able to list exported variables as well, but while the output of -fdump-translation-unit includes variables it didn't seem at all convenient to parse for that purpose.
