http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48525
--- Comment #3 from Jon Roelofs <jroelofs at gmail dot com> 2011-04-09 17:08:06 UTC --- (In reply to comment #2) > (In reply to comment #0) > > When compiling multiple files with inline functions which share the same > > signature and name -O0 produces results inconsistent with -O1, -O2, and -O3 > > (which produce the expected result). > > As Andreas said, this is an One Definition Rule violation, you need to make > the > functions static or put them in an anonymous namespace if you want to have a > different definition in each file. > > > gcc version 4.2.1 (Apple Inc. build 5666) (dot 3) > > This compiler is not supported by the GCC project, the oldest supported > release > is 4.3 > > You should report issues with your compiler to Apple. I get the same results on: gcc version 4.5.1 20100924 (Red Hat 4.5.1-4) (GCC) Would it not be prudent for g++ to at least emit a warning when the ODR is violated in cases like this?
