Changing CFLAGS when using ./configure script

Posted on 2001-07-06
Last Modified: 2010-04-22

Ok, Im trying to compile SSH 3.0 on my FreeBSD on an Alpha server.

When I run the configure script everything is fine and my makefiles are created.

But the problem is when I compile with make.

It warn's me that the -O2 flag trigger some known optimiser bug.

So I would like to change the directive for it to use -O1 instead of -O2

I tried changing the CFLAGS shell variable, but it didn't work.
I also tried to change the CFLAGS directive in the top level MakeFile

but that didn't do eigther.

How can I tell make to use the -O1 flag instead of the -O2 flags when I run make?

Ps: If I try to compile using the -O2 flag, the systems panic and reboot.

Question by:Lazypete
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LVL 14

Accepted Solution

chris_calabrese earned 50 total points
ID: 6259640
Look in the configure script for where it sets -O2.  You probably have to change it there.

Author Comment

ID: 6259926
Hmmm... is there somekind of... better way that tempering with the
configure script.... there is almost 20 places where
it set the CFLAGS variable in the script...

There must be another way...
LVL 14

Expert Comment

ID: 6259974
Well, the point of the configure script is that you're not supposed to have to know this stuff.  If there's a problem with your compiler, you need to change the configure script to detect the problematic compiler and change its behavior.  Then send the change back to the owner of the configure script.
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LVL 14

Expert Comment

ID: 6259980
Or, if this is the commercial SSH you're using from F-Secure or SSH Communications, and they won't take the changes back, switch to OpenSSH where they will gladly take the changes back.

Expert Comment

ID: 6471961
Have you been helped here so that you may award and close this or is more needed?


Community Support Moderator @ Experts Exchange

Author Comment

ID: 6471971
well I finaly made it...
I tempered the file and I was able to compile it.

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