For PR633:
Add configure checks for setjmp/longjmp for Chris. I can't believe this easy
PR has been outstanding for so long. If I don't get to something, please
remind me! :)

llvm-svn: 28686
diff --git a/llvm/autoconf/configure.ac b/llvm/autoconf/configure.ac
index e0a2005..41d02e9 100644
--- a/llvm/autoconf/configure.ac
+++ b/llvm/autoconf/configure.ac
@@ -562,9 +562,9 @@
 AC_HEADER_TIME
 
 AC_CHECK_HEADERS([dlfcn.h execinfo.h fcntl.h inttypes.h limits.h link.h])
-AC_CHECK_HEADERS([malloc.h signal.h stdint.h unistd.h utime.h windows.h])
-AC_CHECK_HEADERS([sys/mman.h sys/param.h sys/resource.h sys/time.h sys/types.h])
-AC_CHECK_HEADERS([malloc/malloc.h])
+AC_CHECK_HEADERS([malloc.h setjmp.h signal.h stdint.h unistd.h utime.h])
+AC_CHECK_HEADERS([windows.h sys/mman.h sys/param.h sys/resource.h sys/time.h])
+AC_CHECK_HEADERS([sys/types.h malloc/malloc.h])
 if test "$ENABLE_THREADS" -eq 1 ; then
   AC_CHECK_HEADERS(pthread.h)
 fi
@@ -594,6 +594,7 @@
 AC_CHECK_FUNCS([getpagesize getrusage gettimeofday isatty mkdtemp mkstemp ])
 AC_CHECK_FUNCS([mktemp realpath sbrk setrlimit strdup strerror strerror_r ])
 AC_CHECK_FUNCS([strtoll strtoq sysconf malloc_zone_statistics ])
+AC_CHECK_FUNCS([_setjmp _longjmp setjmp longjmp sigsetjmp siglongjmp])
 AC_C_PRINTF_A
 AC_FUNC_ALLOCA
 AC_FUNC_RAND48