@@ -640,11 +640,18 @@
 
 	OBJCFLAGS="$old_OBJCFLAGS"
 	;;
 esac
 
-AC_CHECK_FUNCS(_Unwind_Backtrace)
+case "$host_os" in
+hpux*)
+	dnl _Unwind_Backtrace() returns complete garbage on HP-UX.
+	;;
+*)
+	AC_CHECK_FUNCS(_Unwind_Backtrace)
+	;;
+esac
 
 case "$host_os" in
 darwin*)
 	AC_SUBST(LDFLAGS_REEXPORT, ["-Wl,-reexport-lobjfw"])
 	AS_IF([test x"$objc_runtime" = x"Apple runtime"], [