Tim, I traced the build failure to a Debian patch from Debian bug report 357775. The specific patch is 11_fix_get_libdir_name.diff, which can be viewed here, about midpoint in the page: http://lists.alioth.debian.org/pipermail/pkg-kde-commits/2006-June/003702.h… I reversed the patch and then was able to build on 64-bit. Ignoring obvious file size differences, my 64-bit package looks exactly the same as my 32-bit package. In my patch I added some informational text to help debugging because the specific build failure message appears in three different locations. Here is my proposed patch: =========================================================== diff -urN pytdeextensions/setup.py pytdeextensions.new/setup.py --- pytdeextensions/setup.py 2012-05-27 17:59:26.000000000 -0500 +++ pytdeextensions.new/setup.py 2012-06-13 20:12:18.000000000 -0500 @@ -135,7 +135,7 @@ if self.clib!=None: self.clib = glob.glob(os.path.join(self.clib,'libgcc*.a'))[0] if self.clib is None: - raise SystemExit, "Failed to find a suitable libgcc library" + raise SystemExit, "setup.py: Failed to find a suitable libgcc library" self.announce("Using %s for clib" % self.clib) # Make a list of places to look for python .so modules diff -urN pytdeextensions/src/kdedistutils.py pytdeextensions.new/src/kdedistutils.py --- pytdeextensions/src/kdedistutils.py 2012-06-13 11:01:28.000000000 -0500 +++ pytdeextensions.new/src/kdedistutils.py 2012-06-13 20:17:43.000000000 -0500 @@ -660,7 +660,7 @@ if self.clib!=None: self.clib = glob.glob(os.path.join(self.clib,'libgcc*.a'))[0] if self.clib is None: - raise SystemExit, "Failed to find a suitable libgcc library" + raise SystemExit, "kdedistutils.py (1): Failed to find a suitable libgcc library" self.announce("Using %s for clib" % self.clib) # Make a list of places to look for python .so modules @@ -1591,7 +1591,7 @@ if self.clib!=None: self.clib = glob.glob(os.path.join(self.clib,'libgcc*.a'))[0] if self.clib is None: - raise SystemExit, "Failed to find a suitable libgcc library" + raise SystemExit, "kdedistutils.py (2): Failed to find a suitable libgcc library" self.announce("Using %s for clib" % self.clib) # Make a list of places to look for python .so modules @@ -2229,7 +2229,7 @@ ########################################################################### def get_libdir_name(): - #if os.uname()[4] in ['x86_64','mips64','ppc64','sparc64','s390x']: - # return 'lib64' - #else: + if os.uname()[4] in ['x86_64','mips64','ppc64','sparc64','s390x']: + return 'lib64' + else: return 'lib' =========================================================== Do you want me to push this patch to GIT or do you want to first run a Debian/Ubuntu test build? Darrell