https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81519
Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P4
--- Comment #10 from Martin Liška <marxin at gcc dot gnu.org> ---
Note that I'm not planning to come up with a script. It's quite a concrete
usage, so I would recommend you to put a script into your project.
Idea of the script can be:
$ gcc --help=target -Q &>/tmp/1 && gcc --help=target -Q -march=haswell &>/tmp/2
&& diff -u /tmp/1 /tmp/2 | grep '^+'
+++ /tmp/2 2018-11-19 08:21:08.180761742 +0100
+ -maes [enabled]
+ -march= haswell
+ -mavx [enabled]
+ -mavx2 [enabled]
+ -mavx256-split-unaligned-load [disabled]
+ -mavx256-split-unaligned-store [disabled]
+ -mbmi [enabled]
+ -mbmi2 [enabled]
+ -mcx16 [enabled]
+ -mf16c [enabled]
+ -mfma [enabled]
+ -mfsgsbase [enabled]
+ -mhle [enabled]
+ -mlzcnt [enabled]
+ -mmovbe [enabled]
+ -mno-sse4 [disabled]
+ -mpclmul [enabled]
+ -mpopcnt [enabled]
+ -mrdrnd [enabled]
+ -msahf [enabled]
+ -msse3 [enabled]
+ -msse4 [enabled]
+ -msse4.1 [enabled]
+ -msse4.2 [enabled]
+ -mssse3 [enabled]
+ -mtune= haswell
+ -mxsave [enabled]
+ -mxsaveopt [enabled]
