Re: New to egcs, observations, questions

[Zack Weinberg <zack at rabi dot columbia dot edu>]

On Fri, 26 Feb 1999 13:45:26 -0600 (EST), David Wollmann wrote:
>
>I just install egcs 1.1.1 on my RH 5.0 box so I could get a proper
>mySQL build .  I've rebuilt my 2.2.1 kernel and XFree86 3.3.3.1 with
>it, and while I haven't noticed a significant speed increase, I have
>observed that after the kernel an d X re-builds, my swap usage seems
>to be much more sane. I noticed an improvemen t in swap after the
>kernel build, and another improvement after re-building
>XFree86. Thanks to the reduced swapping, I guess, the system seems to
>be responding much quicker and smoother in X apps. Does egcs fix
>memory leaks tha t exist in binaries compiled with gcc 2.7*?

I don't believe there's been a change that would affect this
directly.  egcs 1.1.1 may do a better job of optimizing code, such
that it doesn't use as much memory and/or locality of reference is
improved (less thrashing).  2.2.1 kernel has some big improvements in
the swap code, that might explain what you see - were you using it before?

>Another question: being a newbie at glibc2, I'm wondering if I'm
>going to hurt myself if I re-build pre6 with egcs? Should I rebuild
>my apps or glibc2 first?

Libc 2.0.7pre6?  Don't even think about it.  Get the rpms for redhat
5.2 libc and use them.  Libc 2.0.x has to be compiled with great care
and needs patches on top of the last public release in order to behave
itself.  The bugs are around C++ and dynamic linkage.  mySQL probably
hits both of those.

2.1 libc is much better behaved but I still wouldn't advise trying to
compile it yourself.

zw