Georg Schwarz wrote:
>>On a NetBSD box, that is set in /usr/share/mk/sys.mk
>>
>>DBG?=   -O2
>>
>>CFLAGS?=        ${DBG}
>>
>>I have had problems building some software on a Linux system because
>>the optimization was not defined.
> 
> Thanks. Setting DBG= in mk.conf seems to give me what I want.

 From the GCC manual:
"If you use multiple -O options, with or without level numbers, the last 
such option is the one that is effective."

So if your CFLAGS were '-O2 -m486 -O3', -O3 would be used, meaning that 
you had what you wanted all along :-)

And why "CFLAGS+=" in mk.conf instead of just "CFLAGS="? You told it to 
_add_ your flags.


- IT