Re: Library collision

[Bob Friesenhahn]

On Wed, 14 Feb 2007, Jeff Safier wrote:

> I have two libraries (from an existing Windows app) that have been
> converted to LINUX static libraries
> It seems that each library calls a function from the other library.
>
> I noticed that the library order in my Makefile.am needs to be
> order dependent, meaning if a library calls another libraries functions
> the calling libray must be first in the list.  Is this neccesarily true,
> or am I doing something wrong.
> Is there a way to disable the order dependency so the above scenario
> will work.

There are a number of issues with library order.  I see that Ralph has 
mentioned some of them.  One of the big issues related to automake is 
the library installation order.  The libraries need to be listed in 
order of decreasing dependency so that if they need to be re-linked at 
install time, the library just built is used rather than some older 
installed version.  In other words, the library needs to be actually 
installed, before something attempts to relink with it.  If you are 
working on a system with already installed libraries, you can get bit 
when your package is installed in a different environment.  This is 
yet another reason to avoid circular dependencies.

Bob
======================================
Bob Friesenhahn
address@hidden, http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer,    http://www.GraphicsMagick.org/