Configure: moved icc detection before gcc. New versions of icc confuse auto/cc/name due to introduced handling of a "icc -v": $ icc -v icc version 12.1.3 (gcc version 4.6.0 compatibility) $ icc -V Intel(R) C Compiler XE for applications running on IA-32, Version 12.1.3.293 Build 20120212 Copyright (C) 1985-2012 Intel Corporation. All rights reserved. FOR NON-COMMERCIAL USE ONLY See report here: http://mailman.nginx.org/pipermail/nginx/2012-February/032177.html