Build world with DEBUG_FLAGS='-g -O0'

[Bernd Walter]

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.