Bug #21053 for GD: Make tries to link libpng, even if you tell it you don't want it

Thu Aug 17 14:54:17 2006 awkay69 [...] yahoo.com - Ticket created

Subject:

Make tries to link libpng, even if you tell it you don't want it

The linkage from the build system tries to link against libpng (and others) even if you specify that you do not have them installed.

Thu Aug 17 15:45:45 2006 LDS [...] cpan.org - Correspondence added 6 min

If gdlib-config is installed (which it is under all recent versions of libgd) then the libraries it specifies when passed the --libs option will override the individual library options passed to Makefile.PL. This ensures that GD will always link properly. If this is what you are experiencing, then it is not a bug but a feature.

Thu Aug 17 15:45:46 2006 The RT System itself - Status changed from 'new' to 'open'

Thu Aug 17 15:45:48 2006 LDS [...] cpan.org - Given to LDS

Thu Aug 17 16:47:04 2006 awkay69 [...] yahoo.com - Correspondence added

On Thu Aug 17 15:45:45 2006, LDS wrote: Show quoted text

> If gdlib-config is installed (which it is under all recent versions of > libgd) then the libraries it specifies when passed the --libs option > will override the individual library options passed to Makefile.PL. This > ensures that GD will always link properly. If this is what you are > experiencing, then it is not a bug but a feature.

Specifically in Makefile.PL: line 31 should NOT include -lpng, and there should be a line around 195 that looks like: push @LIBS,'-lpng' if $PNG;

Thu Aug 17 18:13:42 2006 LDS [...] cpan.org - Correspondence added 1 min

Fair enough. If using an old version of gdlib then the logic of putting libpng onto @libs is incorrect, and this will be fixed in the next version of GD. However, the code that decides what to put onto @libs will never be invoked if gdlib-config is present, which is almost always the case nowadays.

Thu Aug 17 18:13:44 2006 LDS [...] cpan.org - Status changed from 'open' to 'resolved'