Should gl_MANYWARN_ALL_GCC be adding some gcc -f options? For example, at least gcc 4.3.4 -Wdisabled-optimization would emit a warning that several other -W warnings are useless without -funit-at-a-time also in place (see coreutils commit 5e361387d). Also, according to 'info gcc, -Wsuggest-attribute=pure only works if -fipa-pure-const is turned on (true by default for -O compilation, but apparently the -W option can also catch a few cases even without -O if -fipa-pure-const is manually turned on).
-- Eric Blake ebl...@redhat.com +1-919-301-3266 Libvirt virtualization library http://libvirt.org
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