https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87672
--- Comment #11 from jamespharvey20 at gmail dot com ---
I can confirm applying Bernd Edlinger's "2018-10-21 18:16:41 UTC" patch on
current trunk prevents all 3 reported errors, and allows using
CPPFLAGS="-D_FORTIFY_SOURCE=2" and the additions of "-O2" into
{libiberty,gcc}/configure.
Obviously, no one is obligated to provide me any insight. (Of course, no one
was even obligated to fix this, thanks Bernd for doing so!) I'd love hearing:
(1) how stage 2 was succeeding but stage 3 was failing, in a short "explain it
to me like I can compile and use gcc and know the theory of bootstrapping, but
have no idea what this patch is really doing"; and (2) if this patch fixes a
somewhat "hidden/silent" bug that needed to be fixed even for people not
compiling using these compilation flags, or if the fix is limited in scope to
those using these flags who would run into the compilation error.
