On Wed, Jun 27, 2018 at 08:53:48AM -0700, Steve Ellcey wrote: > Are other people building GCC seeing these messages during the build: > > cc1plus: warning: -Wabi won't warn about anything [-Wabi] > cc1plus: note: -Wabi warns about differences from the most up-to-date ABI, > which is also used by default > cc1plus: note: use e.g. -Wabi=11 to warn about changes from GCC 7 > > It doesn't seem to be causing any problems in the build (even bootstrap) > but I am wondering why it is there. It seems to be happening when > using the latest (just built) g++ to build libstdc++ so it shouldn't > be related to the system GCC that I am using to build with. > > I didn't find any mention of it in the gcc or libstdc++ mailing lists > when I looked or find any bugzilla report.
I see it too, started with r261571. libstdc++/acinclude.m4 needs to be adjusted: WARN_FLAGS='-Wall -Wextra -Wwrite-strings -Wcast-qual -Wabi' I guess to -Wabi=11? Marek
