Bug 182607

Summary: RFE: rpmbuild should warn for unused shared libraries
Product: [Fedora] Fedora Reporter: dann
Component: rpmAssignee: Paul Nasrat <nobody+pnasrat>
Status: CLOSED WONTFIX QA Contact: Mike McLean <mikem>
Severity: medium Docs Contact:
Priority: medium    
Version: 4Keywords: FutureFeature
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Hardware: All   
OS: Linux   
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Fixed In Version: Doc Type: Enhancement
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Last Closed: 2006-03-18 13:48:06 UTC Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description Flags
script to run ldd -u -r against executables and libraries none

Description dann 2006-02-23 17:22:53 UTC 
According to Ulrich Drepper's "How to write shared libraries" document
(http://people.redhat.com/drepper/dsohowto.pdf document)
unused shared libraries are to be avoided because they impose unwanted overheads.  

A huge number of shared libraries in FC have unused dependencies.
As part of sanity checking the package 
rpmbuild could run "ldd -u -r " on all binaries and shared libraries and warn
about unused libraries. This could make package authors aware of the issue and
provide an incentive to improve the package.

Just my 2 cents.
Comment 1 Jeff Johnson 2006-03-18 13:33:48 UTC 
The idea is sound, and rpm could pretty easily add a build root policy check like
the attached script if desired.

However, the choice to eliminate unused shared libraries is way outside the scope of rpm
even though a rpmbuild build root policy script might very well be an efficient implementation
mechanism.
Comment 2 Jeff Johnson 2006-03-18 13:44:15 UTC 
The idea is sound, and rpm could pretty easily add a build root policy check like
the attached script if desired.

However, the choice to eliminate unused shared libraries is way outside the scope of rpm
even though a rpmbuild build root policy script might very well be an efficient implementation
mechanism.
Comment 3 Jeff Johnson 2006-03-18 13:46:49 UTC 
Created attachment 126302 [details]
script to run ldd -u -r against executables and libraries

Try
    find /bin | ldd-unused.sh