configure probs with sparc-unknown-linux

I'm not able to build XEmacs on Redhat Linux 6.1 for sparc due to some problems with the configure script. This goes for the latest 21.2 beta as well as 21.1.9. `sed' is having trouble with some of the lines in conftest.s2 and conftest.frag. sed on this machine is GNU sed version 3.02. Has anyone else seen this problem? The output below is what I see at the end of ./configure just after Installation is written out. The result is that all the Makefiles end up as empty files. creating ./config.status creating Makefile.in sed: file conftest.s2 line 35: Unknown command: `` creating lib-src/Makefile.in sed: file conftest.s2 line 35: Unknown command: `` creating lwlib/Makefile.in sed: file conftest.s2 line 35: Unknown command: `` creating src/Makefile.in sed: file conftest.s2 line 35: Unknown command: `` creating src/paths.h sed: file conftest.s2 line 35: Unknown command: `` creating lib-src/config.values sed: file conftest.s2 line 35: Unknown command: `` creating lib-src/ellcc.h sed: file conftest.s2 line 35: Unknown command: `` creating src/config.h sed: file conftest.frag line 1: Unknown command: ``%'' creating lwlib/config.h sed: file conftest.frag line 1: Unknown command: ``%'' creating ./Makefile creating ./GNUmakefile creating lib-src/Makefile creating lib-src/GNUmakefile creating lwlib/Makefile creating lwlib/GNUmakefile creating src/Makefile creating src/GNUmakefile % ls -l Makefile lib-src/Makefile lwlib/Makefile src/Makefile -r--r--r-- 1 jason wheel 0 Feb 19 23:31 Makefile -r--r--r-- 1 jason wheel 0 Feb 19 23:31 lib-src/Makefile -r--r--r-- 1 jason wheel 0 Feb 19 23:31 lwlib/Makefile -r--r--r-- 1 jason wheel 0 Feb 19 23:31 src/Makefile