[PATCH] kbuild, deb-pkg: fix Architecture field when cross compiling

[Asbjoern Sloth Toennesen <asbjorn@asbjorn.biz>]

Attempt to guess the correct value of the Architecture control
field, based on the ARCH environment variable. Fallback to letting
deb-gencontrol use the host platform's architecture.

With this patch the following make command:

	make ARCH=i386 deb-pkg

will output an i386 Debian package instead of an amd64 one,
when run on amd64 machine.

Signed-off-by: Asbjoern Sloth Toennesen <asbjorn@asbjorn.biz>
---
 scripts/package/builddeb |   18 +++++++++++++++++-
 1 files changed, 17 insertions(+), 1 deletions(-)

diff --git a/scripts/package/builddeb b/scripts/package/builddeb
index 5f1e2fc..02fd63f 100644
--- a/scripts/package/builddeb
+++ b/scripts/package/builddeb
@@ -25,8 +25,24 @@ create_package() {
 	chown -R root:root "$pdir"
 	chmod -R go-w "$pdir"
 
+	# Attempt to find correct debian architecture
+	local forcearch="" debarch=""
+	case "$ARCH" in
+		x86_64) debarch="amd64" ;;
+		i386|ia64) debarch="$ARCH" ;;
+		*)
+			case "$SUBARCH" in
+				arm) debarch=$(grep -q CONFIG_AEABI=y .config \
+						&& echo armel || echo arm) ;;
+			esac
+			;;
+	esac
+	if [ -n "$debarch" ] ; then
+		forcearch="-DArchitecture=$debarch"
+	fi
+
 	# Create the package
-	dpkg-gencontrol -isp -p$pname -P"$pdir"
+	dpkg-gencontrol -isp $forcearch -p$pname -P"$pdir"
 	dpkg --build "$pdir" ..
 }
 
-- 
1.7.2.3