LinkageMapELF.isMasterLink(): literally compare

Comparing the lengths of the names alone seems like too much of an
assumption, so literally compare the beginning of the soname to the
basename of the given file.

1 files changed, 5 insertions, 3 deletions

diff --git a/pym/portage/util/_dyn_libs/LinkageMapELF.py b/pym/portage/util/_dyn_libs/LinkageMapELF.py
index 4b23421bb..d4c490cdb 100644
--- a/pym/portage/util/_dyn_libs/LinkageMapELF.py
+++ b/pym/portage/util/_dyn_libs/LinkageMapELF.py
@@ -481,7 +481,9 @@ class LinkageMapELF(object):
 
 	def isMasterLink(self, obj):
 		"""
-		Determine whether an object is a master link.
+		Determine whether an object is a "master" symlink, which means
+		that its basename is that same as the beginning part of the
+		soname and it lacks the soname's version component.
 
 		@param obj: absolute path to an object
 		@type obj: string (example: '/usr/bin/foo')
@@ -492,12 +494,12 @@ class LinkageMapELF(object):
 
 		"""
 		os = _os_merge
-		basename = os.path.basename(obj)
 		obj_key = self._obj_key(obj)
 		if obj_key not in self._obj_properties:
 			raise KeyError("%s (%s) not in object list" % (obj_key, obj))
+		basename = os.path.basename(obj)
 		soname = self._obj_properties[obj_key][3]
-		return (len(basename) < len(soname))
+		return len(basename) < len(soname) and soname.startswith(basename)
 
 	def listLibraryObjects(self):
 		"""