On 10/02/10 16:34, Fulko Hew wrote:
On Wed, Feb 10, 2010 at 10:57 AM, Seth Vidal <skvidal@xxxxxxxxxxxxxxxxx
<mailto:skvidal@xxxxxxxxxxxxxxxxx>> wrote:
On Wed, 10 Feb 2010, Fulko Hew wrote:
I've been perplexed by yum....
I have a package (rpm) I've created. One if its dependencies is
'perl-SNMP-Session'. When I build my package the process reports
(trimmed for brevity):
Requires: /bin/sh /usr/bin/perl bash chkconfig coreutils grep
initscripts mysql-server perl >= 0:5.002 perl(AutoLoader)
...
perl(SNMP_Session)
...
To install, I use: 'yum install --nogpgcheck MyPackage.rpm'
On Fedora boxes (example F12) it detects the missing dependency
and also installs perl-SNMP-Session, but on an RHEL 5.4 box it
doesn't report the missing dependency.
Note: The RHEL 5.4 box does have the mrtg package installed,
and that package has a copy of the relevant files I need,
(but the mrtg package doesn't install them into a location that
Perl can find.)
# rpm -qa --filesbypkg | grep SNMP_Session
mrtg /usr/lib/mrtg2/SNMP_Session.pm
Using the 'verbose' flag during yum install, it says:
looking for ('perl(SNMP_Session)', None, (None, None, None)) as
a requirement of MyPackage.noarch 0-1.0-5 u
but: 'yum list "*SNMP_Session*"' reports it as 'available',
_not_ 'installed':
Available Packages:
perl-SNMP_Session.noarch 1.12-3.el5.1 epl
So the question is...
if its not installed, why isn't it being required/found as a
missing dependency?
run:
rpm -qR mypackage.rpm
b/c I suspect the things providing perl(SNMP_Session) are different
on el5 than on f12.
Running the above command (without the .rpm extension) results in a list
that contains the 'perl(SNMP_Session)'
-------
What I think is different is: on el5, the mrtg package was installed,
and on my f12 I didn't.
Pursuing it further on el5... when I ran yum deplist MyPackage I see:
...
dependency: perl(SNMP_Session)
provider: perl-SNMP_session.noarch 1.12-3.el5.1
provider mrtg.i386 2.14.5-2
... that led me to look at mrtg with:
rpm -q --provides mrtg
and it reports amongst other things:
perl(SNMP_Session)
so it seems to me that, the _other_ package (mrtg) is reporting
that it is 'providing' a resolvable resource, that other packages
should be able to use (even though they only have a private
copy in a private location)
... and that is telling yum, that what _I_ need 'should' be installed
because
mrtg is telling it so... incorrectly.
I would think the 'correct' answer would be to 'fix' mrtg so that
it doesn't tell yum/rpm that it is providing something that
others can't find/use.
http://bugzilla.redhat.com/247113
Fixed in Fedora but not yet it seems in RHEL 5.
I tested this by erasing the mrtg package and re-installing MyPackage...
... still no joy, because yum knows perl-SNMP-Session can be resolved
by either mrtg or perl-SNMP_Session (as shown above) and it still
picked mrtg as the way to go.
My only recourse (at the moment) seems to be to manually install
perl-SNMP-Session first, and then MyPackage.
Comments?
Your problematic dependency appears to be on perl(SNMP_Session), not
perl-SNMP_session. Both mrtg and perl-SNMP_session "provide"
perl(SNMP_Session), which is what causes your problem. I suspect that
the dependency of perl(SNMP_Session) in your package is added
automatically by rpm at build time, or do you actually have "Requires:
perl(SNMP_Session)" in your spec file?
My suggestion is to simply add:
Requires: perl-SNMP_session
to MyPackage.spec, rebuild it and see how that goes. This should work
better since the package you want provides this, and mrtg doesn't.
Paul.
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