how to unset cflags?

shanenin · 01-25-2004, 08:52 PM

I have been searching for a while(still can't find the info I need). I need to make sure my cflags are unset when I build binutils. How do I know if my CFLAGS or CXXFLAGS are set? how would I unset them.

lyle_s · 01-25-2004, 09:11 PM

You can see what CFLAGS and CXXFLAGS are set to via:

echo $CFLAGS

and

echo $CXXFLAGS

at the command line.

To unset them (you're going to wince a bit when you read this):

unset CFLAGS

and

unset CXXFLAGS

Lyle

shanenin · 01-25-2004, 09:17 PM

does that mean cflags are incorperated in my shell(.bash_profile)?

lyle_s · 01-25-2004, 09:33 PM

CFLAGS and CXXFLAGS are ordinary shell environment variables that by convention gcc and other compilers consult to alter their behavior.

They could be set in any file (.bashrc, .bash_profile, /etc/profile, etc) that sets environment variables, or set at the command line.

If you get output like this:

lyle@bowman:~$ echo $CFLAGS

lyle@bowman:~$ echo $CXXFLAGS

lyle@bowman:~$

before you compile, you can be assured they aren't set.

Lyle

shanenin · 01-25-2004, 09:36 PM

thanks for all of your help, you cleared a lot up.