On 28 January 2011 12:29, Paul van Hoven wrote: > I checked that I exported the path to the libs: > > echo $LD_LIBRARY_PATH > /Users/toom/gcc4.3.5/requiredLibs/gmp-5.0.1/lib/:/Users/toom/gcc4.3.5/requiredLibs/mpfr-3.0.0/lib/ Did you definitely 'export' it as well as set it? In any case, you will find more info if you look in config.log and find the last error There are lots of config.log files in different sub-directories, you need to look in the right one, which I think would be i386-apple-darwin10.6.0/libgcc/config.log