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 .

google-perftools link only with libunwind.so.7 .

diff -dup -rup libunwind-20110424git1e10c293-orig//src/Makefile.am libunwind-20110424git1e10c293//src/Makefile.am
--- libunwind-20110424git1e10c293-orig//src/Makefile.am	2011-04-24 19:56:54.000000000 +0200
+++ libunwind-20110424git1e10c293//src/Makefile.am	2011-04-24 21:56:15.000000000 +0200
@@ -1,5 +1,5 @@
 SOVERSION=7:0:0		# See comments at end of file.
-SETJMP_SO_VERSION=0:0:0
+#SETJMP_SO_VERSION=0:0:0
 #
 # Don't link with start-files since we don't use any constructors/destructors:
 #
@@ -9,7 +9,7 @@ lib_LIBRARIES =
 lib_LTLIBRARIES =
 if !REMOTE_ONLY
 lib_LIBRARIES += libunwind-ptrace.a
-lib_LTLIBRARIES += libunwind.la libunwind-setjmp.la
+lib_LTLIBRARIES += libunwind.la #libunwind-setjmp.la
 endif
 
 noinst_HEADERS =
@@ -27,8 +27,8 @@ libunwind_ptrace_a_SOURCES =						  \
 noinst_HEADERS += ptrace/_UPT_internal.h
 
 ### libunwind-setjmp:
-libunwind_setjmp_la_LDFLAGS		= $(COMMON_SO_LDFLAGS)		     \
-					  -version-info $(SETJMP_SO_VERSION)
+#libunwind_setjmp_la_LDFLAGS		= $(COMMON_SO_LDFLAGS)		     \
+#					  -version-info $(SETJMP_SO_VERSION)
 
 if USE_ELF32
 LIBUNWIND_ELF = libunwind-elf32.la
@@ -40,12 +40,12 @@ if USE_ELFXX
 LIBUNWIND_ELF = libunwind-elfxx.la
 endif
 
-libunwind_setjmp_la_LIBADD		= $(LIBUNWIND_ELF)	\
-					  libunwind-$(arch).la	\
-					  libunwind.la -lc
-libunwind_setjmp_la_SOURCES		= setjmp/longjmp.c	\
-					  setjmp/siglongjmp.c
-noinst_HEADERS				+= setjmp/setjmp_i.h
+#libunwind_setjmp_la_LIBADD		= $(LIBUNWIND_ELF)	\
+#					  libunwind-$(arch).la	\
+#					  libunwind.la -lc
+#libunwind_setjmp_la_SOURCES		= setjmp/longjmp.c	\
+#					  setjmp/siglongjmp.c
+#noinst_HEADERS				+= setjmp/setjmp_i.h
 
 ### libunwind:
 libunwind_la_LIBADD =
@@ -369,7 +369,7 @@ if ARCH_ARM
 if !REMOTE_ONLY
  libunwind_arm_la_LIBADD += libunwind.la -lc
 endif
- libunwind_setjmp_la_SOURCES += arm/siglongjmp.S
+# libunwind_setjmp_la_SOURCES += arm/siglongjmp.S
 else
 if ARCH_IA64
  ia64_mk_Gcursor_i_SOURCES = ia64/mk_Gcursor_i.c
@@ -389,8 +389,8 @@ Lcursor_i.h: ia64/mk_Lcursor_i
 if !REMOTE_ONLY
  libunwind_ia64_la_LIBADD += libunwind.la -lc
 endif
- libunwind_setjmp_la_SOURCES += ia64/setjmp.S  ia64/sigsetjmp.S  \
-				ia64/longjmp.S ia64/siglongjmp.S
+# libunwind_setjmp_la_SOURCES += ia64/setjmp.S  ia64/sigsetjmp.S  \
+#				ia64/longjmp.S ia64/siglongjmp.S
 else
 if ARCH_HPPA
  lib_LTLIBRARIES += libunwind-hppa.la
@@ -402,7 +402,7 @@ if ARCH_HPPA
 if !REMOTE_ONLY
  libunwind_hppa_la_LIBADD += libunwind.la -lc
 endif
- libunwind_setjmp_la_SOURCES += hppa/siglongjmp.S
+# libunwind_setjmp_la_SOURCES += hppa/siglongjmp.S
 else
 if ARCH_MIPS
  lib_LTLIBRARIES += libunwind-mips.la
@@ -414,7 +414,7 @@ if ARCH_MIPS
 if !REMOTE_ONLY
  libunwind_mips_la_LIBADD += libunwind.la -lc
 endif
- libunwind_setjmp_la_SOURCES += mips/siglongjmp.S
+# libunwind_setjmp_la_SOURCES += mips/siglongjmp.S
 else
 if ARCH_X86
  lib_LTLIBRARIES += libunwind-x86.la
@@ -426,7 +426,7 @@ if ARCH_X86
 if !REMOTE_ONLY
  libunwind_x86_la_LIBADD += libunwind.la -lc
 endif
- libunwind_setjmp_la_SOURCES += x86/longjmp.S x86/siglongjmp.S
+# libunwind_setjmp_la_SOURCES += x86/longjmp.S x86/siglongjmp.S
 else
 if ARCH_X86_64
  lib_LTLIBRARIES += libunwind-x86_64.la
@@ -438,7 +438,7 @@ if ARCH_X86_64
 if !REMOTE_ONLY
  libunwind_x86_64_la_LIBADD += libunwind.la -lc
 endif
- libunwind_setjmp_la_SOURCES += x86_64/longjmp.S x86_64/siglongjmp.S
+# libunwind_setjmp_la_SOURCES += x86_64/longjmp.S x86_64/siglongjmp.S
 else
 if ARCH_PPC32
  lib_LTLIBRARIES += libunwind-ppc32.la
@@ -450,7 +450,7 @@ if ARCH_PPC32
 if !REMOTE_ONLY
  libunwind_ppc32_la_LIBADD += libunwind.la -lc
 endif
- libunwind_setjmp_la_SOURCES += ppc/longjmp.S ppc/siglongjmp.S
+# libunwind_setjmp_la_SOURCES += ppc/longjmp.S ppc/siglongjmp.S
 else
 if ARCH_PPC64
  lib_LTLIBRARIES += libunwind-ppc64.la
@@ -462,7 +462,7 @@ if ARCH_PPC64
 if !REMOTE_ONLY
  libunwind_ppc64_la_LIBADD += libunwind.la -lc
 endif
- libunwind_setjmp_la_SOURCES += ppc/longjmp.S ppc/siglongjmp.S
+# libunwind_setjmp_la_SOURCES += ppc/longjmp.S ppc/siglongjmp.S
 
 endif # ARCH_PPC64
 endif # ARCH_PPC32
diff -dup -rup libunwind-20110424git1e10c293-orig//tests/Makefile.am libunwind-20110424git1e10c293//tests/Makefile.am
--- libunwind-20110424git1e10c293-orig//tests/Makefile.am	2011-04-24 19:56:54.000000000 +0200
+++ libunwind-20110424git1e10c293//tests/Makefile.am	2011-04-24 21:57:31.000000000 +0200
@@ -27,7 +27,7 @@ if ARCH_IA64
 			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
@@ -44,8 +45,8 @@ endif #ARCH_IA64
 			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 test-varargs	\
 			Gperf-simple Lperf-simple			\
 			Gperf-trace Lperf-trace
@@ -120,8 +122,8 @@ if USE_ELFXX
 LIBUNWIND_ELF = $(top_builddir)/src/libunwind-elfxx.la
 endif
 
-LIBUNWIND_setjmp = $(top_builddir)/src/libunwind-setjmp.la	\
-		   $(LIBUNWIND_ELF) $(LIBUNWIND)
+#LIBUNWIND_setjmp = $(top_builddir)/src/libunwind-setjmp.la	\
+#		   $(LIBUNWIND_ELF) $(LIBUNWIND)
 
 test_async_sig_LDADD = $(LIBUNWIND_local) -lpthread
 test_flush_cache_LDADD = $(LIBUNWIND_local)
@@ -156,6 +158,6 @@ Lperf_simple_LDADD = $(LIBUNWIND_local)
 Ltest_trace_LDADD = $(LIBUNWIND_local)
 Lperf_trace_LDADD = $(LIBUNWIND_local)
 
-test_setjmp_LDADD = $(LIBUNWIND_setjmp)
-ia64_test_setjmp_LDADD = $(LIBUNWIND_setjmp)
+#test_setjmp_LDADD = $(LIBUNWIND_setjmp)
+#ia64_test_setjmp_LDADD = $(LIBUNWIND_setjmp)