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Re: Emacs and last libpng release

On 2/10/2015 1:13 PM, Yaakov Selkowitz wrote:
On Tue, 2015-02-10 at 12:44 -0500, Ken Brown wrote:
On 2/10/2015 11:55 AM, Angelo Graziosi wrote:
Ken Brown wrote:
I think the better way is for all libraries that rely on libpng15 to rebuild
for libpng16.

Does this mean that there is some library which, after being rebuilt, will allow
Emacs to be build OB, linking to libpng16, without the need to install libpng15?

I think that's right.  It looks to me like ImageMagick and fontconfig are both
adding -lpng15 to the link command line.  I'm puzzled about fontconfig because
it was just rebuilt.

$ pkg-config --libs fontconfig
-lfontconfig -lexpat -lfreetype -lbz2 -lz -lpng15 -lm -lz -lexpat -lfreetype
-lbz2 -lz -lpng16 -lm -lz

Yaakov, can you explain this?

cygcheck -c libfontconfig-devel libfreetype-devel ?

Sorry, you lost me. I don't see anything in libfreetype-devel that explains why the output of 'pkg-config --libs fontconfig' should contain '-lpng15'. freetype2 itself doesn't have this problem:

$ pkg-config --libs freetype2
-lfreetype -lbz2 -lz -lpng16 -lm -lz


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