Free GCC and built-in features

Question

GCC docs at http://gcc.gnu.org/onlinedocs/gcc/C-Dialect-Options.html say (under -ffreestanding) what a standalone environment implies -fno-builtin. Perhaps I misunderstand what a stand-alone environment is or how it works, but it seems to me that since built-in functions usually generate embedded code instead of calling a library function, this is ideal for a stand-alone environment where the standard library may lack functionality or even be completely absent .

So why don't we want to use biltins with a standalone environment?

Answer 1

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