[MacPorts] #28991: libgnomecanvas @2.30.2 build fails due to missing libpng12

[MacPorts]

#28991: libgnomecanvas @2.30.2 build fails due to missing libpng12
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 Reporter:  robertson@…                   |       Owner:  macports-tickets@…                   
     Type:  defect                        |      Status:  new                                  
 Priority:  Normal                        |   Milestone:                                       
Component:  ports                         |     Version:  1.9.2                                
 Keywords:  libgnomecanvas libpng         |        Port:  libgnomecanvas                       
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 When I try to install libgnomecanvas I get the following error (line
 breaks added for readability):

 {{{
 :info:build /bin/sh ../libtool --tag=CC   --mode=link /usr/bin/gcc-4.2
 -pipe -O2
 -arch x86_64  -version-info 3000:2:3000  -L/opt/local/lib -arch x86_64 -o
 libgnomecanvas-2.la -rpath /opt/local/lib gnome-canvas-shape.lo
 gnome-canvas-bpath.lo gnome-canvas-path-def.lo
 gnome-canvas-clipgroup.lo gnome-canvas-line.lo gnome-canvas-pixbuf.lo
 gnome-canvas-polygon.lo gnome-canvas-rect-ellipse.lo gnome-canvas-text.lo
 gnome-canvas-rich-text.lo gnome-canvas-util.lo gnome-canvas-widget.lo
 gnome-canvas.lo libgnomecanvastypes.lo gailcanvas.lo gailcanvasitem.lo
 gailcanvasgroup.lo gailcanvaswidget.lo gailcanvastext.lo
 gailcanvasitemfactory.lo
 gailcanvasgroupfactory.lo gailcanvaswidgetfactory.lo
 gailcanvastextfactory.lo
 -L/opt/local/lib -lgailutil -lgtk-x11-2.0 -lgdk-x11-2.0 -latk-1.0
 -lpangocairo-1.0
 -lXext -lXrender -lXinerama -lXi -lXrandr -lXcursor -lXcomposite -lXdamage
 -lgdk_pixbuf-2.0 -lgio-2.0 -lXfixes -lcairo -lX11 -lpng14 -lart_lgpl_2
 -lpangoft2-1.0
 -lpango-1.0 -lm -lfreetype -lfontconfig -lgobject-2.0 -lgmodule-2.0
 -lgthread-2.0
 -lglib-2.0 -lintl   -lm
 :info:build grep: /opt/local/lib/libpng12.la: No such file or directory
 :info:build /opt/local/bin/gsed: can't read /opt/local/lib/libpng12.la: No
 such file or directory
 :info:build libtool: link: `/opt/local/lib/libpng12.la' is not a valid
 libtool archive
 :info:build make[3]: *** [libgnomecanvas-2.la] Error 1
 :info:build make[2]: *** [all] Error 2
 :info:build make[1]: *** [all-recursive] Error 1
 :info:build make: *** [all] Error 2
 }}}

 This is a bit perplexing since you'll notice that the command is asking
 for libpng14 which does exist. Perhaps there's a problem with libtool. By
 creating "png12" symlinks to the libpng14.* files I was able to work
 around this error.

 Dave

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Ticket URL: <https://trac.macports.org/ticket/28991>
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