Being compiled version of GPC installed on Ubuntu, the following very simple program fails to produce any output: program testcrt; uses crt; begin writeln('OK'); writeln(sqrt(-1)); { error } end. $ gpc --automake testcrt.pas -o testcrt $ ./testcrt ./testcrt: argument to `SqRt' is < 0 (error #708 at 40b6c6) Notice the absence of OK. Similarly, removing error line makes program produce no output. Removing 'uses crt;' restores normal behavior. Version info and such: $ gpc --version gpc 20070904, based on gcc-4.1.3 20080420 (prerelease) (Ubuntu 2.1-4.1.2-22ubuntu1) Copyright (C) 2006 Free Software Foundation, Inc. $ uname -a Linux flower2 2.6.27-11-generic #1 SMP Fri Jan 23 13:58:13 UTC 2009 x86_64 GNU/Linux Any ideas of how to fix this?