maintainer-feedback requested: [Bug 209686] www/webkit2-gtk3: 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 209686: www/webkit2-gtk3: Fix build with libc++ 3.8.0
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=209686



--- Description ---
Created attachment 170534
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=170534&action=edit
Fix type for pow() call in www/webkit2-gtk3

During the exp-run in bug 208158, it was found that www/webkit2-gtk3 gives
errors with libc++ 3.8.0 [1]:

/wrkdirs/usr/ports/www/webkit2-gtk3/work/webkitgtk-2.8.5/Source/WebCore/renderi
ng/shapes/BoxShape.cpp:46:40:
error: call to 'pow' is ambiguous
	return radius + (margin * (1 + pow(ratio - 1, 3)));
				       ^~~

This is because ratio is of type LayoutUnit, which is a class that has both
conversions to float and double.  Therefore, it is ambiguous if pow(float) or
pow(double) should be called.  Fix it by explicitly casting to float, since it
seems that most of the LayoutUnit handling is done with it.

[1]
http://package18.nyi.freebsd.org/data/headamd64PR208158-default/2016-05-01_10h2
9m48s/logs/errors/webkit2-gtk3-2.8.5_2.log