From c23ea051ccee613e668b2a87817d49a28215ac8b Mon Sep 17 00:00:00 2001
From: Ian Campbell <Ian.Campbell@citrix.com>
Date: Tue, 5 Feb 2013 15:47:41 +0000
Subject: xen: enable stubdom on a per arch basis

... and disable on ARM (for now).

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
Committed-by: Ian Campbell <ian.campbell@citrix.com>
---
 m4/subsystem.m4 | 65 +++++++++++++++++++++++++++++++++++++++++++++------------
 1 file changed, 52 insertions(+), 13 deletions(-)

(limited to 'm4')

diff --git a/m4/subsystem.m4 b/m4/subsystem.m4
index d3eb8c96f8..9e1e61f848 100644
--- a/m4/subsystem.m4
+++ b/m4/subsystem.m4
@@ -1,32 +1,71 @@
+AC_DEFUN([AX_ENABLE_SUBSYSTEM], [
+$1=y
+SUBSYSTEMS="$SUBSYSTEMS $1"
+])
+
+AC_DEFUN([AX_DISABLE_SUBSYSTEM], [
+$1=n
+])
+
 AC_DEFUN([AX_SUBSYSTEM_DEFAULT_ENABLE], [
 AC_ARG_ENABLE([$1],
 AS_HELP_STRING([--disable-$1], [Disable build and install of $1]),[
-$1=n
+AX_SUBSYSTEM_INTERNAL([$1])
 ],[
-$1=y
-SUBSYSTEMS="$SUBSYSTEMS $1"
-AS_IF([test -e "$1/configure"], [
-AC_CONFIG_SUBDIRS([$1])
+AX_ENABLE_SUBSYSTEM([$1])
 ])
-])
-AC_SUBST($1)
+AX_SUBSYSTEM_CONFIGURE([$1])
+AC_SUBST([$1])
 ])
 
 AC_DEFUN([AX_SUBSYSTEM_DEFAULT_DISABLE], [
 AC_ARG_ENABLE([$1],
 AS_HELP_STRING([--enable-$1], [Enable build and install of $1]),[
-$1=y
-SUBSYSTEMS="$SUBSYSTEMS $1"
-AS_IF([test -e "$1/configure"], [
-AC_CONFIG_SUBDIRS([$1])
+AX_SUBSYSTEM_INTERNAL([$1])
+],[
+AX_DISABLE_SUBSYSTEM([$1])
 ])
+AX_SUBSYSTEM_CONFIGURE([$1])
+AC_SUBST([$1])
+])
+
+AC_DEFUN([AX_SUBSYSTEM_CONDITIONAL], [
+AC_ARG_ENABLE([$1],
+AS_HELP_STRING([--enable-$1], [Enable build and install of $1]),[
+AX_SUBSYSTEM_INTERNAL([$1])
 ],[
-$1=n
+AS_IF([test "x$2" = "xy"],[
+AX_ENABLE_SUBSYSTEM([$1])
+],[
+AX_DISABLE_SUBSYSTEM([$1])
 ])
+AX_SUBSYSTEM_CONFIGURE([$1])
 AC_SUBST($1)
 ])
-
+])
 
 AC_DEFUN([AX_SUBSYSTEM_FINISH], [
 AC_SUBST(SUBSYSTEMS)
+echo "Will build the following subsystems:"
+for x in $SUBSYSTEMS; do
+	echo "  $x"
+done
+])
+
+AC_DEFUN([AX_SUBSYSTEM_INTERNAL], [
+AS_IF([test "x$enableval" = "xyes"], [
+AX_ENABLE_SUBSYSTEM([$1])
+],[
+AS_IF([test "x$enableval" = "xno"],[
+AX_DISABLE_SUBSYSTEM([$1])
+])
+])
+])
+
+AC_DEFUN([AX_SUBSYSTEM_CONFIGURE], [
+AS_IF([test -e "$1/configure"], [
+if test "x$$1" = "xy" || test "x$$1" = "x" ; then
+    AC_CONFIG_SUBDIRS([$1])
+fi
+])
 ])
-- 
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