Re: [Exim] Bug in compiling 3.34

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Auteur: George R Kasica
Date:  
À: Phil Pennock
CC: exim-users
Sujet: Re: [Exim] Bug in compiling 3.34
On Thu, 27 Dec 2001 18:20:47 +0100, you wrote:

>On 2001-12-27 at 10:48 -0600, George R . Kasica wrote:
>> >Do these enhancements/upgrades include a different resolver library?
>> Not that I'm aware of...I've not touched glibc. If you can tell me
>> where its located I can let you know.
>
>On a GNU/Linux distribution, that'll be /lib/libc.so.N -- N is likely to
>be either 5 or 6. On a Debian GNU/Linux box to which I have access,
>libresolv is "/lib/libresolv.so.2".

13 Nov 17 21:13 libc.so.6 -> libc-2.1.1.so

18 Nov 17 21:14 libresolv.so.2 -> libresolv-2.1.1.so

>AIUI, if you have both libc.so.5 (glibc5) and libresolv, then you have a
>mixed setup with both libraries. The migration to glibc6 is a major
>project which caused even the professional vendors much pain.


>Heck, at this point I'd recommend just running "ldconfig" as root and
>seeing if that helps. Unlikely.

[root@eagle /lib]# ldconfig
ldconfig: /lib/gnulibc1/libiberty.so.1.0 is not a shared object file
(Type: 1).

>
>> OK...not being a C programmer I'll trust you on this.
>Trust ... me? *muahahahaaaa* Foolhardy. ;^)

thanks....LOL

>
>> >You mentioned several rebuilds; have you tried unpacking a fresh source
>> >hierarchy, putting Local/Makefile (and the eximon.conf file, if desired)
>> >in place, and then trying again? Clean go.
>> OK...here we go...
>
>Erk. But then ...
>> >Do you happen to recall if the previous build recognised your system as
>> >Linux-libc5 instead of Linux? What did your system start out as? What
>> >is your current exim binary linked against?
>
>> No, I don't, but in trying to recompile the 3.33 (yes I saved the old
>> build) I get the same error at the same point, so its obviously
>> something broken....question being how do I fix it as I have no clue
>> what is broken?
>
>(*phew*, not Exim) Okay, this helps. We now know for sure that it's
>not really an Exim issue.

Great...I now have to figure out libc...

>> The system start as in terms of what? linked against? I don't follow
>> the question as I said, I'm not a C-programmer here.
>
>Sorry for the confusion. Did the system start with glibc5 or glibc6 (I
>have a sneaking suspicion that the former is known as libc5 without the
>g)?

libc5

>
>"ldd" lists the libraries against which a binary is linked. If you
>still have the _working_ Exim from 3.33, then "ldd /path/to/exim" will
>tell you which libraries were used before, and thus which libraries are
>kinda likely to work this time, if things haven't gone completely gooey.

[root@eagle /root]# ldd /usr/local/exim/sbin/exim
        libnsl.so.1 => /usr/local/lib/libnsl.so.1 (0x40015000)
        libcrypt.so.1 => /usr/local/lib/libcrypt.so.1 (0x4002b000)
        libdb.so.3 => /usr/local/lib/libdb.so.3 (0x40058000)
        libresolv.so.2 => /usr/local/lib/libresolv.so.2 (0x40094000)
        libdl.so.2 => /usr/local/lib/libdl.so.2 (0x400a2000)
        libm.so.6 => /usr/local/lib/libm.so.6 (0x400a5000)
        libc.so.6 => /usr/local/lib/libc.so.6 (0x400c2000)
        libutil.so.1 => /usr/local/lib/libutil.so.1 (0x401b3000)
        /lib/ld-linux.so.2 => /lib/ld-linux.so.2 (0x40000000)


>
>If there's "libresolv" then I'm stumped. You really need to ask now in
>another forum.

uh oh....

>If there's not, then the mix-up is probably because of the library
>change. Rerunning "ldconfig" to rebuild the links and cache for the
>dynamic library system might help.

tried that...no go.

>You see, on the Debian box to which I have access (I use a BSD myself),
>libresolv and libc contain the functions which you're after.
>$ foo() { nm --defined-only $1 | egrep '(res_(state|init|search)|dn_expand)'; }
>$ foo /usr/lib/libresolv.a
>00000000 T __dn_expand
>000001b0 T __res_search
>$ foo /usr/lib/libc.a
>res_init.o:
>0000000c T __res_init
>00000000 W __res_state
>$
>
>So since dns.o appears on the command-line before either -lresolv or -lc
>it should be picking up these symbols.
>
>"ldconfig"; if that doesn't help, go drink alcohol and have a good
>evening, because I suspect that you have a crap day ahead of you
>tomorrow, building a new system, unless a Linux guru on a Linux list
>recognises these symptoms.

great....I think I'll head for my orthopaedic doc appt. and see when
he wants to do surgery on my rt. shoulder...no I'm not kidding.

>My apologies for the slightly hostile initial response. exim-users
>nowadays sees an inordinate number of posts from people who ask the same
>basic questions, which are in the Spec, the FAQ, the list archives, the
>samples, The Book ... some of the regulars (and the cranks like me) can
>get a little miffed at posts which lack important information and at the
>same time make claims of rather startling bugs in Exim. You might wish
>to read the excellent articles (more patient than I am) at:
> <http://www.chiark.greenend.org.uk/~sgtatham/bugs.html>
> "How to Report Bugs Effectively"
>and:
> <http://www.tuxedo.org/~esr/faqs/smart-questions.html>
> "How To Ask Questions The Smart Way"
>(both of which I now push as Required Reading).

Thanks, I'll check them out.

George

George, MR. Tibbs, Nazerene & The Beast Kasica(8/1/88-3/19/01)
Jackson, WI USA
georgek@???
http://www.netwrx1.com/georgek
ICQ #12862186

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