Bug 497294 – net-misc/networkmanager-0.9.8.8 - hardened gcc-4.6.3 miscompiles due to -fpartial-inlining

• Status: RESOLVED FIXED
• Product: Gentoo Linux

[Description Jan Kundrát (RETIRED) 2014-01-06 17:51:18 UTC]

Using gcc-4.6.3 (USE=amd64 cxx elibc_glibc fortran hardened kernel_linux mudflap multilib nls nptl openmp userland_GNU), the net-misc/networkmanager-0.9.8.8 is miscompiled when using CFLAGS="-O2 -pipe -march=native -mavx -maes -ggdb". Adding -fno-partial-inlining to the CFLAGS fixes this issue, and using net-misc/networkmanager-0.9.6.4 with the original CFLAGS works fine as well. Upgrading to GCC 4.7.3 and using the unmodified -O2 works, too.

All details which I have are available at https://bugzilla.gnome.org/show_bug.cgi?id=721465 .

[Comment 1 Magnus Granberg 2014-04-05 19:36:09 UTC]

Looks like it fixed in newer gcc?

[Comment 2 Jan Kundrát (RETIRED) 2014-04-07 08:23:37 UTC]

(In reply to Magnus Granberg from comment #1)
> Looks like it fixed in newer gcc?

Yes, that's what I reported here three months ago.

[Comment 3 Alexandre Rostovtsev (RETIRED) 2014-04-07 14:05:26 UTC]

We could add a check to the networkmanager ebuild to automatically add -fno-partial-inlining to CFLAGS if a problematic compiler is detected.

The question is, how to check for a problematic compiler? Is there something we can do with gcc-specs-directive() to determine whether this is gcc on a hardened profile?

[Comment 4 Magnus Granberg 2014-07-08 22:55:43 UTC]

Way need to check for hardened compiler when it is GCC that have a bug and it is fixed in newer version?

[Comment 5 Anthony Basile 2014-10-17 17:41:46 UTC]

(In reply to Magnus Granberg from comment #4)
> Way need to check for hardened compiler when it is GCC that have a bug and
> it is fixed in newer version?

Is this bug still relevant? Sould we just block against an older version of gcc and move on?

[Comment 6 Magnus Granberg 2015-01-14 19:17:26 UTC]

Fixed in newer gcc >=4.7.3