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Subject: Re: [OMPI users] Building openmpi from src rpm: rpmbuild --rebuild errors with 'cpio: MD5 sum mismatch' (since openmpi 1.4.5)
From: Prentice Bisbal (prentice_at_[hidden])
Date: 2012-06-06 13:01:17

On 05/31/2012 02:04 AM, livelfs wrote:
> Hi
> Since 1.4.5 openmpi release, it is no longer possible to build openmpi
> binary with rpmbuild --rebuild if system rpm package version is 4.4.x,
> like in SLES10, SLES11, RHEL/CentOS 5.x.
> For instance, on CentOS 5.8 x86_64 with rpm
> [root_at_horizon _tmp]# rpmbuild --rebuild openmpi-1.4.5-1.src.rpm
> Installing openmpi-1.4.5-1.src.rpm
> warning: user jsquyres does not exist - using root
> error: unpacking of archive failed on file
> /usr/src/redhat/SPECS/openmpi-1.4.5.spec;4fc65c74: cpio: MD5 sum mismatch
> error: openmpi-1.4.5-1.src.rpm cannot be installed
> Apparently this problem is due to lack of support of SHA-256 in rpm 4.4.x
> Googling suggests
> rpmbuild -bs \
> --define "_source_filedigest_algorithm md5" \
> --define "_binary_filedigest_algorithm md5" \
> package.spec
> should be used to produce openmpi src rpms and avoid the problem.
> Please note that
> - rpmbuild works OK on RHEL/CentOS 5.x with openmpi-1.4.4-1.src.rpm
> and all previous versions
> - rpmbuild works OK on with all openmpi versions with rpm 4.8.x from
> RHEL/CentOS 6.x
> - this is of course not blocking, since I successfully tested 2
> workarounds
> 1) install package with --nomd5, then rpmbuild -ba <specfile>
> 2) repackage with "old" rpm:
> rpm2cpio to extract spec file + sources tar
> rpmbuild -bs <specfile> to produce new src rpm
> Then rpmbuild --rebuild is OK

This is a known "problem" with RHEL 6 that burned me, too. I say
"problem" in quotes because in my case, it only appeared when I tried to
install RPMS built for RHEL 5 on a RHEL 6 system. That's a problem to
me, but some purists don't see this is a problem and just say "Well,
that's what you get for trying to install RHEL 5 RPMs on a RHEL 6
system. I don't agree with them.

As a work around, i think I did some magic with rpm2cpio, as documented
above, but I don't remember the details.