Add test for libtool versioning sanity

Test that the shared objects created during compilation matches the
expectations of the person bumping the libtool version, which is oh
so easy to get wrong. This of course needs to be skipped for static builds.

tests/atlocal.in

@@ -1,5 +1,7 @@
-LD_LIBRARY_PATH="${abs_builddir}/testing@usrlibdir@"
+RPMLIBDIR="@usrlibdir@"
+LD_LIBRARY_PATH="${abs_builddir}/testing/${RPMLIBDIR}"
 export LD_LIBRARY_PATH
+export RPMLIBDIR
 PATH="${abs_builddir}/testing@rpmbindir@:${abs_builddir}/testing@usrbindir@:${abs_builddir}/testing@usrlibexecdir@:$PATH"
 export PATH
 

tests/rpmgeneral.at

@@ -35,6 +35,21 @@ AT_CHECK([runroot rpmbuild --version],[0],
 ])
 AT_CLEANUP
 
+# Check that libtool versioning matches expectations, it's easy to screw up.
+AT_SETUP([rpm library version])
+AT_KEYWORDS([basic])
+AT_SKIP_IF(test -f "${RPMTEST}/${RPMLIBDIR}/librpm.a")
+AT_CHECK([
+cd ${RPMTEST}/${RPMLIBDIR}
+ls lib*.so.*.*
+],
+[0],
+[librpm.so.9.1.0
+librpmbuild.so.9.1.0
+librpmio.so.9.1.0
+librpmsign.so.9.1.0
+])
+AT_CLEANUP
 
 # ------------------------------
 AT_SETUP([rpm --showrc])