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[Bug driver/42445] -march=native isn't saved in COLLECT_GCC_OPTIONS
- From: "joseph at codesourcery dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Thu, 6 Jan 2011 16:47:59 +0000
- Subject: [Bug driver/42445] -march=native isn't saved in COLLECT_GCC_OPTIONS
- Auto-submitted: auto-generated
- References: <bug-42445-4@http.gcc.gnu.org/bugzilla/>
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.