PKG_CONFIG_PATH needs to point to a pkconfig folder containing various 
.pc files.

Look in /usr/lib/pkconfig and /usr/local/lib/pkconfig and check where 
various glib- and gtk-related .pc files are located.
You may well need both pkconfig folders.
PKG_CONFIG_PATH=/usr/local/lib/pkconfig:/usr/lib/pkconfig; export 
PKG_CONFIG_PATH; ./configure

You should be able to compile but you may not be able to run, because 
the program can't find this or that library which you know you have - 
you get a message saying "couldn't find library"

Setting LD_LIBRARY_PATH may avoid that happening, but quite often it 
Usually it's because the program insists on looking for that library in 
/usr/lib when you've got it in /usr/ local (or /usr/lib64 on a 64-bit 
In that case, as root create absolute links from /usr/lib to all those 
particular library files in /usr/local/lib (or wherever).
It solves most problems.



julien wrote:
> Hi,
> I had installed glib-2.20.4 through a rpm built with checkinstall. I
> uninstalled it and re-installed glib with "make install".
> I have the  glib-2.0 directory in /usr/share, /usr/local/share,
> /usr/local/lib
> The PKG-CONFIG_PATH and LD_LIBRARY_PATH environment variables are empty.
> I tried "export LD_LIBRARY_PATH='/usr/local/lib' && export
> PKG_CONFIG_PATH='/usr/local/lib' " before ./configure in the gtk+-2.16.5
> directory : my problem persits.
> I also added the three glib-2.0 paths in, without any success.
> Is this actually a glib path problem? I have the
> /usr/local/lib/ file...
>> On 08/01/2009 08:44 PM, julien wrote:
>>> Hi,
>>> I am trying to install gtk+-2.16.5 from sources under openSuse-11.0,
>>> (before installing unstable GIMP for UI translation).
>>> "Configure" gives no error message.
>>> Running "make" gives this error:
>>> /usr/local/lib/ undefined reference to `g_poll'
>>> I can't find how to resolve this problem.
>>> I'd be grateful for any help.
>> Looks like you're not linking against the proper GLib library, make sure
>> to setup PKG_CONFIG_PATH and LD_LIBRARY_PATH at configure time so that
>> the right dependencies are found preferably through the use of
>>  / Martin
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