In the developer's Makefile, the linker flags are set using this command:

LDFLAGS = -pipe -s `fltk-config --ldstaticflags --use-images`

This results in the link command (from .work.log):

[*] /usr/pkgsrc/foo/bar/work/.wrapper/bin/c++ -o fl_logbook adif_io.o 
calendar.o
 combo.o date.o fl_logbook.o ipcdata.o lgbook.o multipsklog.o qso_db.o 
support.o
 table.o -Lsrc/lib -lhamlib -pipe -s -L/usr/X11R6/lib -L/usr/pkg/lib 
-Wl,-R/usr/
pkg/lib -L/usr/X11R6/lib -Wl,-R/usr/X11R6/lib -L/usr/pkg/lib 
/usr/pkg/lib/libflt
k_images.a -lpng -lz -ljpeg /usr/pkg/lib/libfltk.a -lpthread -lm -lXext 
-lX11
<.> /usr/pkgsrc/foo/bar/work/.gcc/bin/g++ -o fl_logbook adif_io.o 
calendar.o com
bo.o date.o fl_logbook.o ipcdata.o lgbook.o multipsklog.o qso_db.o 
support.o tab
le.o -Lsrc/lib -pipe -s -L/usr/pkgsrc/foo/bar/work/.x11-buildlink/lib 
-L/usr/pkg
src/foo/bar/work/.buildlink/lib -Wl,-R/usr/pkg/lib -Wl,-R/usr/X11R6/lib 
/usr/pkg
/lib/libfltk_images.a /usr/pkg/lib/libfltk.a 
-I/usr/pkgsrc/foo/bar/work/.buildli
nk/include -lhamlib -lpng -lz -ljpeg -lpthread -lm -lXext -lX11

Without those dependencies, the -lpng and -ljpeg cause the link to fail.

Are libpng and libjpeg really needed?  I saw some image files in the 
source distribution and assumed they were used.  Is hamlib really 
needed?  I don't know.  I am not the developer.  Basically, I did what 
was needed to make it build and install successfully under pkgsrc.  I 
did not dig into the code to fix potential bugs.

I assume png and jpeg are required by fltk and therefore linking in fltk 
should automatically include those dependencies.  But that doesn't 
appear to be true.  Is this a bug in the fltk package?

OBATA Akio wrote:

>The following reply was made to PR pkg/32278; it has been noted by GNATS.
>
>From: OBATA Akio <obache@NetBSD.org>
>To: gnats-bugs@NetBSD.org
>Cc: 
>Subject: Re: pkg/32278 (Please add fllogbook to pkgsrc/ham)
>Date: Sun, 21 Jan 2007 01:10:41 +0900
>
> On Sat, 20 Jan 2007 09:05:03 +0000 (UTC), david wrote:
> >  A newer package is attached.
> 
> Why does this package depend on graphics/png and graphics/jpeg ?
> It seems not using png nor jpeg directly and indirectry.
>
>  
>