[igraph] problem generating Makefile

[Jan Berkel]

I can't compile the released version (0.5.1) because configure doesn't  
create a Makefile.
(http://cneurocvs.rmki.kfki.hu/igraph/download/igraph_0.5.1.tar.gz)

i've tested on debian testing as well as on mac os x, same result.  
here's the output:

$ CFLAGS='-L/opt/local/lib -I/opt/local/include' ./configure
checking for gcc... gcc
checking for C compiler default output file name... a.out

--- lots of output left out ---

checking gmp.h usability... yes
checking gmp.h presence... yes
checking for gmp.h... yes
configure: creating ./config.status
config.status: creating src/config.h
config.status: creating R/config.R
config.status: creating src/Makevars

then it stops (exit code is 0). the fact that it doesn't work on 2  
different platforms suggests a problem with the configure file itself.