On Tue, Jan 25, 2011 at 9:22 AM, Wolfgang Denk <w...@denx.de> wrote: > Hello, > > could you please provide some comments about the state of "-Os" > (optimising for size) in the gcc 4.5.x versions of Linaro's tool > chain? > > It appears there are a number of issues with recent versions of GCC > that get triggered when optimising for size, for example > > http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45052 > > http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44392 > > Some other projects like the Linux Foundation driven Poky (resp. > Yocto project) capitulated and stopped using -Os, see for example > here: > http://thread.gmane.org/gmane.linux.embedded.poky/2311/focus=2565 > > > On the other hand, I can see that Linaro even adds improvements for > "-Os", see for example here: > http://thread.gmane.org/gmane.linux.linaro.toolchain/367 > > > So I wonder what the state of these problems with "-Os" is in the > Linaro tool chain? Have these issues been solved, and is "-Os" > reliably working with the Linaro tool chain?
Hi Wolfgang. Linaro is an ARM performance branch of GCC so we aren't making improvements or actively fixing issues at -Os. We should be no worse than upstream for correctness and comparable in the final object size, and will fix any regressions that we introduce. Apart from that I'd recommend talking with the larger ARM community upstream. -- Michael _______________________________________________ linaro-toolchain mailing list linaro-toolchain@lists.linaro.org http://lists.linaro.org/mailman/listinfo/linaro-toolchain
