[jira] [Comment Edited] (MESOS-2690) --enable-optimize build fails with maybe-uninitialized

["Joris Van Remoortere (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/MESOS-2690?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14529364#comment-14529364 ] 

Joris Van Remoortere edited comment on MESOS-2690 at 5/5/15 9:59 PM:
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[~bmahler] [~vinodkone] If you are modifying the CXXFLAGS I think it makes the most sense to add the `Wno-maybe-uninitialized` flag to that CXXFLAGS. As [~cmaloney] mentioned, the moment you augment CXX flags then this invalidates the `--enable-optimize` and `--enable-debug`. I think fixing that behavior should be a separate ticket.

Catching `-02` overall is a more complicated procedure that likely takes away from the readability of the configure. I would like to encourage people to start using the `--enable-optimize` and `--enable-debug` flags and make them more meaningful. Maybe we can incorporate some of the flags you are augmenting into another `--enable-XXX` flag?


was (Author: jvanremoortere):
[~bmahler] [~vinodkone] If you are modifying the CXXFLAGS I think it makes the most sense to add the `-Wno-maybe-uninitialized` flag to that CXXFLAGS. As [~cmaloney] mentioned, the moment you augment CXX flags then this invalidates the `--enable-optimize` and `--enable-debug`. I think fixing that behavior should be a separate ticket.

Catching `-02` overall is a more complicated procedure that likely takes away from the readability of the configure. I would like to encourage people to start using the `--enable-optimize` and `--enable-debug` flags and make them more meaningful. Maybe we can incorporate some of the flags you are augmenting into another `--enable-XXX` flag?

> --enable-optimize build fails with maybe-uninitialized
> ------------------------------------------------------
>
>                 Key: MESOS-2690
>                 URL: https://issues.apache.org/jira/browse/MESOS-2690
>             Project: Mesos
>          Issue Type: Bug
>          Components: build
>         Environment: GCC 4.8 -> 4.9
>            Reporter: Joris Van Remoortere
>            Assignee: Joris Van Remoortere
>            Priority: Blocker
>
> When building with the `enable-optimize` flag, the build fails with `maybe-uninitialized' errors.
> This is due to a bug in GCC when building optimized code triggering false positives for this warning. Please see:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=59970
> We can disable this warning when using GCC + --enable-optimize.
> A quick work-around until there is a patch:
> ../configure CXXFLAGS="-Wno-maybe-uninitialized" <your-other-flags-here>



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