Messages in this thread |  | | | From | "H. Peter Anvin" <> | | Subject | Re: gcc 3.0.2/kernel details (-O issue) | | Date | 19 Dec 2001 19:39:25 -0800 |
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Followup to: <20011220001006.GA18071@arthur.ubicom.tudelft.nl> By author: Erik Mouw <J.A.K.Mouw@its.tudelft.nl> In newsgroup: linux.dev.kernel > > It doesn't change syntax, but anything lower than -O1 simply doesn't > inline functions with an "inline" attribute. The result is that the > inline functions in header files won't get inlined and the compiler > will complain about missing functions at link time (or module insert > time). > > I'm actually surprised that 2.2 can be compiled with -O, AFAIK > linux-2.2 also has a lot of inline functions in headers. I know from > experience that -Os works for 2.4 kernels on ARM, I haven't tested it > with 2.2 or x86. >
-O is -O1. If you turn on the optimizer at all you get inlining.
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