Hi, 1) I don't know 2) Instead of replacing each call to those functions with the new ones, you can use the alias attribute as follow : #define replace_func(old_name, new_name) __typeof__(old_name) new_name __attribute__((weak, alias(#old_name))) replace_func(cmplx, qcmplx); ... You put this in a header file and you're done. -- View this message in context: http://gcc.1065356.n5.nabble.com/use-of-qcmplx-qsqrt-qimag-etc-tp1253416p1253476.html Sent from the gcc - Help mailing list archive at Nabble.com.