Hi, as lapack is moving to cmake as build system, I started to playing with cmake and I suspect no one tried before cmake and fortran together on cygwin. The definition file /usr/share/cmake-2.6.4/Modules/Platform/CYGWIN-g77.cmake is clearly wrong. It tries to build libxxx.dll and so on. Attached the one that I am currently using, copied and modified from CYGWIN-g77.cmake that seems right. Could the cmake maintainer give a check and eventually report the issue upstream ? Regards Marco