$NetBSD: patch-as,v 1.22 2017/02/16 02:25:17 maya Exp $

* Treat DragonFly like FreeBSD.
* Add system ICU support

--- js/src/old-configure.in.orig	2017-01-16 16:16:52.000000000 +0000
+++ js/src/old-configure.in
@@ -140,6 +140,9 @@ fi
 
 MOZ_TOOL_VARIABLES
 
+AC_PROG_CPP
+AC_PROG_CXXCPP
+
 dnl Special win32 checks
 dnl ========================================================
 
@@ -1053,7 +1056,7 @@ dnl Checks for header files.
 dnl ========================================================
 AC_HEADER_DIRENT
 case "$target_os" in
-freebsd*)
+freebsd*|*-*-dragonfly*)
 # for stuff like -lXshm
     CPPFLAGS="${CPPFLAGS} ${X_CFLAGS}"
     ;;
@@ -1184,7 +1187,7 @@ then
     fi
 
 	case "$target" in
-	    *-*-freebsd*)
+	    *-*-freebsd*|*-*-dragonfly*)
 			AC_DEFINE(_REENTRANT)
 			AC_DEFINE(_THREAD_SAFE)
 			dnl -pthread links in -lpthread, so don't specify it explicitly.