3.3 problem of -fzero-initialized-in-bss w/-ffreestanding

[Segher Boessenkool]

Geoff Keating wrote:
> Um, GCC already assumes that it happens before any code is run.  When
> does your system do it?
> 
> I don't think this is an appropriate thing for -ffreestanding.
> Non-hosted environments must still provide all the support
> infrastructure that hosted ones do, with the exception of certain
> headers and library routines.

C99 also specifies it should happen before any code is run:

 From 5.1.2:

	Two execution environments are defined: freestanding
	and hosted.  In both cases, program startup occurs when
	a designated C function is called by the execution
	environment.  All objects in static storage shall be
	initialized (set to their initial values) before program
	startup.


Segher