On Fri, Mar 13, 2015 at 12:23:56PM -0700, Alan Irwin wrote:
> On 2015-03-13 10:26-0700 Alan W. Irwin wrote:
> >On 2015-03-13 10:19-0000 Andrew Ross wrote:
> >>1) The cairo build fails (seems to be due to a bug in cairo build scripts
> >>exposed in gcc-4.9.0 - see http://sourceforge.net/p/mingw-w64/bugs/396/)
> 
> Hi Andrew:
> 
> That thread implies the problem is caused by the build scripts for
> GTK+ which apparently use the -flto link time option that is described
> at <https://gcc.gnu.org/onlinedocs/gcc/Optimize-Options.html>.
> However, there is no mention of "flto" in the epa_build tree so unless
> -flto is on by default with gcc-4.9.0, the source of the issue with
> epa_build of GTK+ (or the pango/cairo subset of that) must be
> something else.  Also note that gcc-4.7.2 knows nothing about the
> -flto option so if the solution is turning off that option for gcc-4.9.x
> that can only be done for that version of gcc.
> 
> In sum, dealing with this epa_build issue for pango/cairo is likely
> not going to be a simple fix so we should look at this again
> post-release.

I agree. Since the epa_build is not core to plplot I don't see this as a
release issue. For reference Debian unstable has gcc-4.9.2. It might be 
interesting to look at the Debian build for the packages / any Debian
specific patches for clues to this issue.

Andrew

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