newlib _REENT_SMALL

[fpaolo63]

Thks Jeff,

I tried to configure
../../../newlib-1.15.0/configure --target=arm-elf --prefix=$MYPREFIX \
--enable-interwork --enable-multilib --with-float=soft \
--disable-newlib-supplied-syscalls \
--enable-newlib-reent-small \
--enable-newlib-multithread=yes
but --enable-newlib-reent-small is not recognized.
Have I to use 1.16.x instead of 1.15.0?

There is, also, a configure parameter for "SMALL_MEMORY" ?

paolo


Jeff Johnston wrote:
> fpaolo63 wrote:
>> Hi all,
>> I'm new on newlib.
>>
>> I just made running my lpc23xx GNU tools chain on UBUNTU.
>> binutil 2.17, GCC 4.2.1, newlib 1.15, gdb 6.6
>>
>> I wrote my own syslib, and I run a rtos application.
>> Now, I'd to reduce the memory footprint of the REENT support.
>>
>> I have rebuilt the newlib setting _REENT_SMALL
>> (newlib_cflags="-DSMALL_MEMORY -D_REENT_SMALL").
>> Application is working fine but "struct _reent"  on my application  is
>> again ~1k.
>>
> If you are always going to use _REENT_SMALL, then do it in 
> libc/include/sys/config.h.
> This means that nothing will accidentally get built without the flag 
> on and this
> files gets included whenever a user includes a newlib header file 
> (i.e. application and
> newlib are consistent).
>
> If you just want to try it out, specify --enable-newlib-reent-small 
> when you configure newlib.
> This will set _REENT_SMALL in libc/include/sys/config.h for you.
>
> -- Jeff J.