http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42445
--- Comment #5 from joseph at codesourcery dot com <joseph at codesourcery dot com> 2011-01-06 16:47:48 UTC --- On Thu, 6 Jan 2011, hjl.tools at gmail dot com wrote: > GCC driver translates -march=native to something cc1/cc1plus > knows. Since -march=native isn't saved in COLLECT_GCC_OPTIONS, > LTO doesn't work with -march=native. If -march=native handling > is moved from GCC driver to cc1/cc1plus, this issue can be solved > very easily. It's deliberate that -march=native is in the driver so that the output of "gcc -v" shows the particular options it chose. Maybe COLLECT_GCC_OPTIONS should be saving the options that were generated from -march=native in the driver.
