http://cvs.fedoraproject.org/viewvc/rpms/libunwind/devel/libunwind-disable-setjmp.patch?revision=1.1&view=markup
http://bugs.gentoo.org/299344

At least x86_64 version cannot work, src/setjmp/setjmp.c and
src/setjmp/sigsetjmp.c are not even compiled, src/x86_64/longjmp.S does not
match src/setjmp/setjmp.c + include/tdep-x86_64/jmpbuf.h .

--- libunwind-1.0.1/src/Makefile.am
+++ libunwind-1.0.1/src/Makefile.am
@@ -9,6 +9,3 @@
 # libunwind-setjmp depends on libunwind-$(arch). Therefore must be added
 # at the end.
-if !REMOTE_ONLY
-lib_LTLIBRARIES += libunwind-setjmp.la
-endif
 
 #
--- libunwind-1.0.1/tests/Makefile.am
+++ libunwind-1.0.1/tests/Makefile.am
@@ -27,7 +27,7 @@
 			Gia64-test-nat Lia64-test-nat			\
 			Gia64-test-rbs Lia64-test-rbs			\
 			Gia64-test-readonly Lia64-test-readonly		\
-			ia64-test-setjmp ia64-test-sig
+			ia64-test-sig
 else
 if ARCH_PPC64
 if USE_ALTIVEC
@@ -44,7 +44,7 @@
 			Gtest-dyn1 Ltest-dyn1				 \
 			Gtest-trace Ltest-trace				 \
 			test-async-sig test-flush-cache test-init-remote \
-			test-mem test-setjmp test-ptrace		 \
+			test-mem test-ptrace		 \
 			Ltest-nomalloc Ltest-nocalloc rs-race
  noinst_PROGRAMS_cdep = forker mapper test-ptrace-misc			 \
 			Gperf-simple Lperf-simple