Bug#370189: Vincent is right, I have the same problem

[Catherine Beauchemin <cbeau@cs.unm.edu>]

Hi,

I have the same problem as Vincent. I have debian testing and after the X 
upgrade of two days ago in debian testing, I was also unable to run 
"./configure" on my program. Of course, running instead

LDFLAGS=-L/usr/X11R6/lib ./configure

fixed the problem for me too. For me also, the files libICE.a libICE.so 
libICE.so.6 and libICE.so.6.4 are in /usr/X11R6/lib and when running

dpkg -S /usr/X11R6/lib/libICE.so.6.4

to find out what package they came from, I get

libice6: /usr/X11R6/lib/libICE.so.6.4

which means that these packages do in fact come from the libice6 package. 
Here is the info regarding the libice6 package I have installed:

libice6 version 6.9.0.dfsg.1-6
Maintainer: Debian X Strike Force

I am running debian testing and this is the libice6 version which comes 
with debian testing so I am not sure why you think these files in 
/usr/X11R6/lib have come from somewhere else.

Cheers,
Catherine.