I get the following error:

> gcc  -prebind -Xlinker -headerpad -Xlinker 690 -L/sw/lib/pango-ft219/ 
> lib -L/sw/lib/freetype219/lib -L/sw/lib/fontconfig2/lib -L/usr/X11R6/ 
> lib -o temacs pre-crt0.o dispnew.o frame.o scroll.o xdisp.o menu.o  
> xmenu.o window.o charset.o coding.o category.o ccl.o character.o  
> chartab.o cm.o term.o terminal.o xfaces.o xterm.o xfns.o xselect.o  
> xrdb.o fontset.o xsmfns.o fringe.o image.o gtkutil.o dbusbind.o  
> emacs.o keyboard.o macros.o keymap.o sysdep.o buffer.o filelock.o  
> insdel.o marker.o minibuf.o fileio.o dired.o filemode.o cmds.o  
> casetab.o casefiddle.o indent.o search.o regex.o undo.o alloc.o  
> data.o doc.o editfns.o callint.o eval.o floatfns.o fns.o font.o  
> print.o lread.o syntax.o unexmacosx.o bytecode.o process.o  
> callproc.o region-cache.o sound.o atimer.o doprnt.o strftime.o  
> intervals.o textprop.o composite.o md5.o    xfont.o ftfont.o  
> xftfont.o ftxfont.o terminfo.o lastfile.o     -L/sw/lib -L/usr/X11/ 
> lib  -L/usr/X11R6/lib -L/sw/lib -L/sw/lib/fontconfig2/lib -lgtk- 
> x11-2.0 -lgdk-x11-2.0 -latk-1.0 -lgio-2.0 -lpangoft2-1.0 - 
> lgdk_pixbuf-2.0 -lpangocairo-1.0 -lcairo -lpango-1.0 -lfreetype - 
> lfontconfig -lgobject-2.0 -lgmodule-2.0 -lglib-2.0 -lintl -lpthread - 
> lSM -lICE -ltiff -ljpeg -lpng -lz -lm -lgif -lXpm -lX11 -L/sw/lib/ 
> fontconfig2/lib -L/sw/lib -L/usr/X11/lib -lXft -lXrender - 
> lfontconfig -lfreetype -lX11  -L/sw/lib -lrsvg-2 -lgdk_pixbuf-2.0 - 
> lcairo -lgobject-2.0 -lgmodule-2.0 -lglib-2.0 -lintl -L/sw/lib - 
> ldbus-1 -lpthread -lncurses  -L/sw/lib -Wl,-framework,CoreServices - 
> Wl,-framework,ApplicationServices -lz -lotf -lfreetype
> Undefined symbols:
>   "_png_check_sig", referenced from:
>       _png_load in image.o
>       _png_load in image.o

-lpng is on the link command; so this is because of incorrect flag- 
ordering
_  -L/usr/X11R6/lib coming before -L%p/lib . Indeed,
%p/lib/libpng.dylib does define  _png_check_sig , while (with X11 2.5.1)
/usr/X11/lib/libpng.dylib does not.

Adding -L%p/lib at the end of the SetLDFLAGS is a quick hack around..
(also, on systems where /usr/X11/lib/libpng.dylib would contain the  
symbol,
this prevents incorrect linking.)

JF Mertens

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