pkg/44527: libpng does not provide standard names

[multix79%yahoo.com@localhost]

>Number:         44527
>Category:       pkg
>Synopsis:       libpng does not provide standard names
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    pkg-manager
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Mon Feb 07 08:15:00 +0000 2011
>Originator:     Riccardo Mottola
>Release:        5.99
>Organization:
GNUstep
>Environment:
NetBSD grid 5.99.44 NetBSD 5.99.44 (nc6120) #0: Mon Jan 31 10:01:52 CET 2011  
multix@tirith:/usr/obj/sys/arch/i386/compile/nc6120 i386

>Description:
Libpng from pkg installs in pkg, it will install its files using the version 
number as postfix (e.g. 15 in this case) both for the libraries as the headers.


ls -l /usr/pkg/lib/libpng15.*
-rw-r--r--  1 root  wheel  172936 Jan 29 18:29 /usr/pkg/lib/libpng15.a
-rwxr-xr-x  1 root  wheel     997 Jan 29 18:29 /usr/pkg/lib/libpng15.la
lrwxr-xr-x  1 root  wheel      18 Jan 29 18:29 /usr/pkg/lib/libpng15.so -> 
libpng15.so.15.1.0
lrwxr-xr-x  1 root  wheel      18 Jan 29 18:29 /usr/pkg/lib/libpng15.so.15 -> 
libpng15.so.15.1.0
-rwxr-xr-x  1 root  wheel  155106 Jan 29 18:29 /usr/pkg/lib/libpng15.so.15.1.0

includes:
drwxr-xr-x   2 root  wheel     512 Jan 29 18:29 libpng15


>How-To-Repeat:
Install
png-1.5.1beta09     Library for manipulating PNG images

>Fix:
Many programs (not referring to other packages of pkgsrc, but to standard 
source packages) will look for the headers in <libpng/png.h> and use the linker 
flag "-lpng" which is perfectly reasonable.

I would suggest to either remove the renaming because the library sonames 
already have the version, major and minor, or add symbolic links. I suppose the 
renaming of the object and directories was done for a kind of "slotting".

The links should be similar to this:

libpng -> libpng15
for the headers

and 
libpng.so -> lib15.so
libpng.so.15 -> libpng15.so