Build world with DEBUG_FLAGS='-g -O0'

[Dmitry Krivenok]

Is there a simple way to build size constrained parts of world (e.g.
bootcode) with '-O2' and other
parts with '-O0'?

On Mon, Apr 12, 2010 at 11:54 PM, Bernd Walter <ticso at cicely7.cicely.de>wrote:

> On Mon, Apr 12, 2010 at 10:34:30PM +0400, Dmitry Krivenok wrote:
> > Hello Hackers,
> >
> > I'm trying to build FreeBSD-CURRENT (r206494) with DEBUG_FLAGS='-g -O0'.
> >
> > Below are the commands I executed:
> >
> > export DEBUG_FLAGS='-g -O0'
> >
> > cd /usr/src/
> >
> > time make buildworld
> >
> >
> > I got the following error:
> >
> > ...
> >
> > ...
> >
> > objcopy -S -O binary boot2.out boot2.bin
> >
> > btxld -v -E 0x2000 -f bin -b
> > /usr/src/obj/usr/src/sys/boot/i386/boot2/../btx/btx/btx -l boot2.ldr  -o
> > boot2.ld -P 1 boot2.bin
> >
> > kernel: ver=1.02 size=690 load=9000 entry=9010 map=16M pgctl=1:1
> >
> > client: fmt=bin size=20ed text=0 data=0 bss=0 entry=0
> >
> > output: fmt=bin size=297d text=200 data=277d org=0 entry=0
> >
> > -2941 bytes available
> >
> > *** Error code 1
> >
> >
> >
> > Stop in /usr/src/sys/boot/i386/boot2.
> >
> > *** Error code 1
> >
> >
> >
> > Stop in /usr/src/sys/boot/i386.
> >
> > *** Error code 1
> >
> >
> >
> > Stop in /usr/src/sys/boot.
> >
> > *** Error code 1
> >
> >
> >
> > Stop in /usr/src/sys.
> >
> > *** Error code 1
> >
> >
> >
> > Stop in /usr/src.
> >
> > *** Error code 1
> >
> >
> >
> > Stop in /usr/src.
> >
> > *** Error code 1
> >
> >
> >
> > Stop in /usr/src.
> >
> >
> >
> > real    87m23.033s
> >
> > user    53m7.195s
> >
> > sys     30m10.744s
> >
> >
> > Error message "-2941 bytes available" is not clear for me :)
> > What's wrong?
>
> It is 2941 bytes too big for bootcode.
> Bootcode is size constrained.
>
> >
> > Thank you beforehand!
> >
> > P.S.
> > Note that compiling with DEBUG_FLAGS='-g' works fine.
>
> Yes - because it compiles with -O2 then, which allows the compiler
> to buld smaller code.
>
> --
> B.Walter <bernd at bwct.de> http://www.bwct.de
> Modbus/TCP Ethernet I/O Baugruppen, ARM basierte FreeBSD Rechner uvm.
>



-- 
Sincerely yours, Dmitry V. Krivenok
e-mail: krivenok.dmitry at gmail.com
skype: krivenok_dmitry
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