Makefiles

[Joel Sherrill <joel@OARcorp.com>]

James Yates wrote:
> 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.

Being tacky you could provide special rules for those two.

o-optimize/xxx.o: XXX.c
	$(CC..... -O0

--joel

> 		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
>>>
>>
>>
>>
> 


-- 
Joel Sherrill, Ph.D.             Director of Research & Development
joel at OARcorp.com                 On-Line Applications Research
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