RPM fails to install with error "cpio: Digest mismatch"

Issue

• While developing for our RHEL 6 server line, we have to rebuild the LSF (load sharing facility) RPM. The build phase runs fine, but when installing the RPM we get the following error:

        [root@tst0006 x86_64]# rpm -iHv lsf-7.6-7.RHEL6.x86_64.rpm 
        Preparing packages for installation...
        group exists
        user exists
        lsf-7.6-7.RHEL6
        error: unpacking of archive failed on file /opt/lsf/linux2.6-glibc2.3-x86_64/lib/ssched/libgcc_s.so.1;4fe3348c: cpio: Digest mismatch

• After a lot of Googling we think it has something to do with prelinking, and the following bugzilla entry (although old) confirms that: https://bugzilla.redhat.com/show_bug.cgi?id=149465
• Indeed LSF ships with its own libgcc, as per recommendation of the RHEL6 Application Compatibility Whitepaper (page 5, point 4, https://www.redhat.com/f/pdf/rhel/RHEL6_App_Compatibility_WP.pdf ).
• We have tried to override the __prelink_undo_cmd in the spec file with the following code, but that fails (and it appears to work on RHEL5). We have removed /etc/rpm/macros.prelink, but that also fails.

        %define __prelink_undo_cmd /bin/cat prelink library