maintainer-feedback requested: [Bug 209077] net/opal: Fix build with libc++ 3.8.0

[bugzilla-noreply at freebsd.org]

Dimitry Andric <dim at FreeBSD.org> has reassigned Bugzilla Automation
<bugzilla at FreeBSD.org>'s request for maintainer-feedback to gnome at FreeBSD.org:
Bug 209077: net/opal: Fix build with libc++ 3.8.0
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=209077



--- Description ---
Created attachment 169728
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=169728&action=edit
Fix type for abs() calls in net/opal

During the exp-run in bug 208158, it was found that net/opal gives errors with
libc++ 3.8.0 [1]:

../common/mpi.cxx:135:18: error: call to 'abs' is ambiguous
    distance = ( abs(MPIs[i].width  - desiredWidth ) *
		 ^~~

This is because abs() is being called with unsigned arguments.	Fix this by
casting the arguments to the appropriate signed type.

[1]
http://package18.nyi.freebsd.org/data/headamd64PR208158-default/2016-03-22_18h3
0m05s/logs/errors/opal-3.10.10_9.log