[Bug target/91148] PowerPC build gets several warnings due to -Wformat-diag

[msebor at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91148

--- Comment #14 from Martin Sebor <msebor at gcc dot gnu.org> ---
Jeff has a setup that builds most if not all targets.  I think he's also got it
hooked up to an emulator but I'm not sure he runs tests.  Unfortunately,
there's no Web interface to it that we could access.  It would be nice to have
it publish the results somewhere like gcc-testresults, along with a warning
summary to help with cleanup like this.  Jeff should be at Cauldron this time
so it would be a good opportunity for a discussion.