Re: [avr-gcc-list] -fPIC/-fpic

[Tyler Hall]

To help keep the bootstrap code from changing, you may want to keep it as
a separate source file, then maybe even tweak your Makefile so it gets built
as a separate target, which also becomes a dependant for the app code:

bootstrap : bootstrap.o
bootstrap.o : bootstrap.c bootstrap.h
app : $(APPOBJS) bootstrap.o

And just treat bootstrap.o as your "shared library", use it explicitly during
the linking stage of your app. If you maintain the bootstrap separately from
your app code (which it really should be since it has it's own starting point
address) then it only gets recompiled if you happen to change the dependant
source files.

Tyler

Joerg Wunsch wrote:
> address@hidden wrote:
>
> > Sounds cool, I'll do that! Thanks! BTW isn't there any chance that
> > the "unchanged" (bootstrap) code will be changed by the compiler
> > somehow? I mean is the same source compiled every time to the SAME
> > binary format if I use the same switches?  (using -Os
> > -mcall-prologues)
> >   
>
> It ought to create the same code, given identical circumstances.
>
> You probably need to be careful with global/static variables though.