On Sat, 15 Jun 2002, Terry Lambert wrote: > Maxime Henrion wrote: > > Terry Lambert wrote: > > > What exactly does this do, besides implying "-fno-builtin"? > > > > > > The documentation says "and implies main has no special requirements"... > > > > > > Neither the kernel nor modules have a "main", so the only thing that's > > > relevent here is the "-fno-builtin", right? > > > > IIRC, -ffreestanding prevented GCC3 from being stupid optimizations like ^^^^^^ smart > > changing occurences of printf("constant string\n") to puts("constant > > string"), which failed for kernel builds since we don't have puts() in > > the kernel... > > That is an incredibly *fugly* "optimization". It assumes that I > use libc, unless I have "-ffreestanding", and it assumes my > implementation of printf vs. puts.
This is a routine optimization. It assumes that you use a C compiler (printf and even libc might not exist, since they might be builtins). A non-routine optimization might involve building hardware to run the application and emitting the 1 bit instruction to turn the hardware on. Bruce To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-current" in the body of the message