Bug 44966

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User-Agent: Mozilla/4.76 [en] (X11; U; Linux 2.4.2-2 i686)

Description of problem:
When the SONAME field is missing from the ELF header, and a versioning file
was used (i.e. "gcc -shared -olibmylibrary.so
-Wl,--version-script,myversionscript mysource.o"  --Notice that the
optional -h flag is missing) find-provides doesn't recognise the versioning
info.  RPM builds the package file, but won't install it because
find-requires _DOES_ see the versioning info, and expects it to be there. 
For example:
find-provides produces: libmylibrary.so
find-requires produces: libmylibrary.so libmylibrary.so(VER2)
If executables or other shared libraries within the same RPM package are
dependent on libmylibrary.so, RPM will not install the package because
"libmylibrary.so(VER2)" can't be found even though it is actually provided
within that very same package file.  We have seen this problem starting at
RPM v3.0.4

How reproducible:
Always

Steps to Reproduce:
1. Build a library without a SONAME field, but with versioning info
2. Build an executable that depends on that library
3. Package them up using RPM
4. Attempt to install the RPM package


Additional info:

The following solution is a replacement for the current find-provides.  If
the SONAME field is absent, it correctly defaults its value to the
filename.  I also moved the check for the symlink files to improve
performance.  I am not sure why the original author uses "file -L", since
the file will only be thrown away by the later check to filter out symbolic
links.  Here is the code:
#!/bin/bash

# This script reads filenames from STDIN and outputs any relevant provides
# information that needs to be included in the package.

filelist=$(grep "\\.so" | grep -v "^/lib/ld.so" | xargs file -L 2>/dev/null
| grep "ELF.*shared object" | cut -d: -f1)

for f in $filelist; do
    if [ ! -L $f ]; then
        soname=$(objdump -p $f | awk '/SONAME/ {print $2}')

        if [ -z "$soname" ]; then
            soname=${f##*/}
        fi
        echo $soname
        objdump -p $f | awk '
            BEGIN { START=0 ; }
            /Version definitions:/ { START=1; }
            /^[0-9]/ && (START==1) { print $4; }
            /^$/ { START=0; }
            ' | \
        grep -v $soname | \
        while read symbol ; do
            echo "$soname($symbol)"
        done
	fi
done | sort -u