Hi, I noticed a strange behaviour with distutils: when compiling C code on windows (using mingw), the compilation warning are not output on the console. For example, umathmodule.c compilation emits the following warnings: numpy\core\src\umathmodule.c.src:128: warning: static declaration of 'acoshf' follows non-static declaration numpy\core\src\umathmodule.c.src:136: warning: static declaration of 'asinhf' follows non-static declaration I think this is coming from distutils because when I execute the exact same command on the shell, I get those warnings. If there is an error (by inserting #error), then all the warnings appear also when using distutils, which would suggest that distutils checks the return status of gcc to decide when to output should be sent on the shell ? Anyway, if we can do something about it, I think it would be better to always output warnings (it took me quite a while to understand why I got warnings with scons and not with distutils...). cheers, David