Robert Young wrote:
Thomas you reply to is not set correctly so I am replying to my message
with you content."Thomas T. Veldhouse" wrote:
> Could be -fomit-frame-pointer
Does a P3 and up support debugging even without a frame pointer?
Maybe I am not reading this correctly but does this not mean that
-fomit-frame-pointer is already on for -O3.
from
http://freesoftware.ircam.fr/mirrors/planetccrma/man/man1/gcc.1.html
snip ...
OPTIMIZATION OPTIONS
These options control various
sorts of optimizations:
-O
-O1 Optimize.
Optimizing compilation takes somewhat
more time, and a lot more memory for a large func
tion.
Without `-O', the compiler's goal is to reduce the
cost of compilation and to make debugging produce
the expected results. Statements are independent:
if you stop the program with a breakpoint between
statements, you can then assign a new value to any
variable or change the program counter to any other
statement in the function and get exactly the re
sults you would expect from the source code.
Without `-O', only variables declared register are
allocated in registers. The resulting compiled
code is a little worse than produced by PCC without
`-O'.
With `-O', the compiler tries to reduce code size
and execution time.
When you specify `-O',
the two options
`-fthread-jumps' and `-fdefer-pop' are turned on.
On machines that have delay slots,
the `-fde
layed-branch' option is turned on. For those ma
chines that can support debugging even without a
frame pointer, the `-fomit-frame-pointer' option is
turned on. On some machines other flags may also
be turned on.
..
snip
>
> ???Yes it could but if I wanted to eliminate my CFLAGS as being the problem.
As far as I know the most stable is -O2 if this doesn't work than the
CFLAGS where not the problem.If I knew that CFLAGS="-march=pentium3 -O3 -pipe" had been tested I would
have changed my CFLAGS to CFLAGS="-march=pentium3 -O3 -pipe" first instead
of CFLAGS="-march=pentium3 -O2".
As it is as far as I now there is no guarantee so I am starting at -O2 and
may be looking at several recompiles after that as well.>
>
> Tom Veldhouse
>
> ----- Original Message -----
> From: "Robert Young" <[EMAIL PROTECTED]>
> To: <[EMAIL PROTECTED]>
> Sent: Friday, August 08, 2003 11:39 AM
> Subject: [gentoo-user] If is doesn't compile with -O3 -pipe is that not
> a
> BUG?
>
> > Just a thought
> >
> > I submitted a bug against Mozilla
> > http://bugs.gentoo.org/show_bug.cgi?id=26068
> >
> > It seems to be because of my CFLAGS
> > CFLAGS="-march=pentium3 -O3 -pipe -fomit-frame-pointer"
> >
> > I changed them to
> > CFLAGS="-march=pentium3 -O2
> >
> > and it seems to be working so far.
> >
> > My question is:
> > Should it not be one of Gentoo's goals to make even optimized
> > systems stable. info2flags on my computer would have produced
> > CFLAGS="-march=pentium3 -O3 -pipe"
> > I believe.
> >
> > This goes against what I keep seeing people say that only
> > CFLAGS="-march=pentium3 -O2" would be stable.
> >
> > To be considered stable currently my understanding is that the ebuild
> > should not have a bug reported against it for so many days or week.
> > Could another requirement be added that is must be shown to be able to
>
> > compile against the architecture that it considered stable in at least
>
> > with "-march=pentium3 -O2" and the flags produced by info2flags
> > "-march=pentium3 -O3 -pipe" in my case?
> >
> > Thanks.
> >
> >
> >
> >
> > --
> > [EMAIL PROTECTED] mailing list
> >
> >--
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