Makefiles

[James Yates]

I have tried this and i get a much bigger executeable, but that's to be
expected, although it is too big for me run through my GDB stub. I
really want to find a solution whereby I can specify a list of sources
that are not optimised as well as a list of sources that are optimised.
I have 2 files out of 30 that I need optimisation turned off for, the
rest I really want optimised. The template Makefile.leaf only seems to
cope with one set of CFLAGS for all c files. This is quite an unusual
problem, but one I am eager to solve. Does anyone have any ideas? I know
a bit about makefiles, but I am no expert.

		James

> -----Original Message-----
> From: Till Straumann [mailto:strauman at slac.stanford.edu] 
> Sent: 25 October 2004 17:35
> To: Jay Monkman
> Cc: James Yates; RTEMS Users
> Subject: Re: Makefiles
> 
> Jay Monkman wrote:
> > On Mon, Oct 25, 2004 at 04:42:29PM +0100, James Yates wrote:
> > 
> >>This is for RTEMS 4.6.0.
> >>
> >>   This would be a nice thing to have on a permanent basis. 
> Inside my 
> >>makefile I have a CFLAGS+=  line.
> 
> (I was assuming you are using the template 'Makefile.leaf').
> 
> >> When I added -O0 to it, my rtems app
> >>seemed to fail to work. I didn't bother investigating this 
> perhaps I 
> >>should have.
> 
> Yes, you should have. I tested 'CFLAGS+= -O0' with one of my 
> applications and it works fine. Could be that disabling 
> optimization triggers a bug in your code?
> 
> >>
> >>Can I then change CFLAGS+=  to CFLAGS =  and use completely 
> different 
> >>flags in building the app to when I built RTEMS.
> 
> Yes, but you are discouraged to do so [unless you really know 
> what you are doing]. The BSP might know of vital flags which 
> must not be omitted.
> 
> T.
> 
> > 
> > 
> > Are you using something like the template Makefile.leaf?
> > 
> > If so, you can modify/overwrite CFLAGS after the lines:
> >    include $(RTEMS_MAKEFILE_PATH)/Makefile.inc
> >    include $(RTEMS_CUSTOM)
> >    include $(RTEMS_ROOT)/make/leaf.cfg
> > 
> 
> 
> 
>