Merge topic 'update-kwsys'

0408415 Merge branch 'upstream-kwsys' into update-kwsys
c01e744 KWSys 2013-10-15 (6eab64c3)

Source/kwsys/SystemInformation.cxx

@@ -88,6 +88,15 @@ typedef int siginfo_t;
 #  include <ifaddrs.h>
 #  define KWSYS_SYSTEMINFORMATION_IMPLEMENT_FQDN
 # endif
+# if defined(KWSYS_SYSTEMINFORMATION_HAS_BACKTRACE)
+#  include <execinfo.h>
+#  if defined(KWSYS_SYSTEMINFORMATION_HAS_CPP_DEMANGLE)
+#    include <cxxabi.h>
+#  endif
+#  if defined(KWSYS_SYSTEMINFORMATION_HAS_SYMBOL_LOOKUP)
+#    include <dlfcn.h>
+#  endif
+# endif
 #endif
 
 #if defined(__OpenBSD__) || defined(__NetBSD__)