Building newlib without -mhard-float

[Jeff Johnston]

Rick Mann wrote:
> 
> On Sep 4, 2007, at 5:09 PM, Jeff Johnston wrote:
> 
>> Rick Mann wrote:
>>> On Sep 4, 2007, at 11:22 AM, Jeff Johnston wrote:
>>>> 2. Disable multilib and manually build a library you want.  In this
>>>>    particular case, you should use TARGET_CFLAGS to append whatever
>>>>    compiler options you want to the default options used to build
>>>>    newlib.  You disable multilib by adding --disable-multilib to
>>> Did you mean CFLAGS_FOR_TARGET instead of TARGET_CFLAGS?
>>>
>>
>> I meant TARGET_CFLAGS.  This is used in all low-level newlib 
>> directories (take a look at libc/string/Makefile.am).  This will add 
>> your options without messing with defaulted and configured options 
>> (e.g. -g -O2 is defaulted and you want to add -march=mycpu).
> 
> Oh, okay. The reason I asked is that after I ran configure, I looked in 
> the top-level makefile for TARGET_CFLAGS and couldn't find it. Should I 
> just do it like this?
> 
> TARGET_CLFAGS="-march=armv5te -mcpu=xscale"
> 

Yes, with CFLAGS spelled correctly :)

> Which brings up another question I've had before: should I just use 
> -mcpu=xscale, or just -march=armv5te, or both? At one point, I got 
> errors in something when I used both, saying that they were in conflict 
> (IIRC--strikes me as incorrect).
> 

That's a question for the ARM experts out there.  I don't know exactly 
what options you want to specify.  I would assume the original 
--print-multi-lib output would show you compatible permutations.

> TIA,
> Rick
>