[gentoo-user] emerge glibc

[gentoo-user] emerge glibc

[Thomas Naujokas]

Last night I did an:

  emerge --update --deep world

Reviewing logs this morning I find in 3125-glibc-2.3.5-r1.log the
following:

  QA Notice: /usr/lib/misc/glibc/pt_chown is setXid, dynamically  
    linked and using lazy bindings.
  This combination is generally discouraged. Try:
    CFLAGS='-Wl,-z,now' emerge glibc

I can see a couple of problems with this:

1.) Wouldn't that compile glibc without any optimization settings? So
    what I would rather do is merge the suggestion with my default
    CFLAGS. Resulting in:

      CFLAGS='-O3 -march=athlon-xp -Wl,-z,now' emerge glibc

    Does this seem reasonable?

2.) My impression of how portage works is that the next time glibc is
    updated it will compile with the default again. Is there some place
    to set this on a permanent basis?

Tom Naujokas

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Re: [gentoo-user] emerge glibc

[Rumen Yotov]

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Thomas Naujokas wrote:

>Last night I did an:
>
>  emerge --update --deep world
>
>Reviewing logs this morning I find in 3125-glibc-2.3.5-r1.log the
>following:
>
>  QA Notice: /usr/lib/misc/glibc/pt_chown is setXid, dynamically  
>    linked and using lazy bindings.
>  This combination is generally discouraged. Try:
>    CFLAGS='-Wl,-z,now' emerge glibc
>
>I can see a couple of problems with this:
>
>1.) Wouldn't that compile glibc without any optimization settings? So
>    what I would rather do is merge the suggestion with my default
>    CFLAGS. Resulting in:
>
>      CFLAGS='-O3 -march=athlon-xp -Wl,-z,now' emerge glibc
>
>    Does this seem reasonable?
>
>2.) My impression of how portage works is that the next time glibc is
>    updated it will compile with the default again. Is there some place
>    to set this on a permanent basis?
>
>Tom Naujokas
>
>  
>
Hi,
First thing IMHO QA-notices are for devs, rarely for users so ignore it
if no error so far.
The CFLAGS you *may* put on the command-line are added to those in
/etc/make.conf, so no need to repeat all.
Think the using "-03" in your USE-flags isn't a good idea (use -02
instead) remember that with -03 any reports to Bugzilla are like INVALID
(devs will suggest you use a more sane flags first).
HTH. Rumen

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Re: [gentoo-user] emerge glibc

[Matan Peled]

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Rumen Yotov wrote:
> Hi,
> First thing IMHO QA-notices are for devs, rarely for users so ignore it
> if no error so far.
> The CFLAGS you *may* put on the command-line are added to those in
> /etc/make.conf, so no need to repeat all.
> Think the using "-03" in your USE-flags isn't a good idea (use -02
> instead) remember that with -03 any reports to Bugzilla are like INVALID
> (devs will suggest you use a more sane flags first).
> HTH. Rumen

- -O3 isn't that insane... I don't think that reports using -O3 are marked invalid
 (someone correct me?)

Anyway, -O2 is sometime actually /better/ than -O3, too. I like -Os the best, at
least on x86 (Its definitly not for amd64).


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