Hi phi, On Wed, Apr 10, 2019 at 09:46:45AM +0200, phi gcc wrote: > built-in function 'exp' declared as non-function > > exp is a symbol of mine (An array of struct), not a function. > > I can't change the Makefile CFLAGS that are setup tight (-Wall etc....) Preferably you should add --no-builtin-exp. But you can also add a line #pragma GCC diagnostic ignored "-Wbuiltin-declaration-mismatch" Segher