From df9a8d021d538c438c8fcfdd9fc12b50c63b5a1d Mon Sep 17 00:00:00 2001
From: Michael Schroeder <mls@suse.de>
Date: Thu, 17 Mar 2022 15:28:38 +0100
Subject: [PATCH] Add debian cross build support

---
 build-pkg-deb    | 23 +++++++++++++++++++++++
 build-recipe-dsc | 12 ++++++++++++
 2 files changed, 35 insertions(+)

diff --git a/build-pkg-deb b/build-pkg-deb
index bac42e80e..0f15eb217 100644
--- a/build-pkg-deb
+++ b/build-pkg-deb
@@ -180,6 +180,29 @@ pkg_runscripts_deb() {
     fi
 }
 
+pkg_sysrootinstall_deb() {
+    if test "x$1" = "x--prepare" ; then
+	assert_dir_path "$BUILD_SYSROOT"
+	chroot $BUILD_ROOT mkdir -p "$BUILD_SYSROOT"
+	local target=$(queryconfig target --dist "$BUILD_DIST" --configdir "$CONFIG_DIR" --archpath "$BUILD_ARCH")
+	if test -n "$target" ; then
+	    local debarch=$(deb_chroot $BUILD_ROOT dpkg-architecture -q DEB_HOST_ARCH --host-type "$target")
+	    if test -n "$debarch" ; then
+		echo "Adding architecture $debarch"
+		deb_chroot $BUILD_ROOT dpkg --add-architecture "$debarch"
+	    fi
+	fi
+	return
+    fi
+    if test "x$1" = "x--finalize" ; then
+	return
+    fi
+
+    ( deb_chroot $BUILD_ROOT dpkg --install $DEB_UNSAFE_IO --force-depends .init_b_cache/$PKG.deb 2>&1 || touch $BUILD_ROOT/exit ) | \
+	perl -ne '$|=1;/^(Configuration file|Installing new config file|Selecting previously deselected|Selecting previously unselected|\(Reading database|Unpacking |Setting up|Creating config file|Preparing to replace dpkg|Preparing to unpack )/||/^$/||print'
+}
+
+
 # Local Variables:
 # mode: Shell-script
 # End:
diff --git a/build-recipe-dsc b/build-recipe-dsc
index 9aa256339..5467d4681 100644
--- a/build-recipe-dsc
+++ b/build-recipe-dsc
@@ -158,6 +158,18 @@ dsc_build() {
 	DSC_BUILD_CMD="source $TOPDIR/SOURCES/build.script"
 	chmod +x $buildroot/$TOPDIR/SOURCES/build.script
     fi
+    if test -z "$ABUILD_TARGET" ; then
+        ABUILD_TARGET=$(queryconfig target --dist "$BUILD_DIST" --configdir "$CONFIG_DIR" --archpath "$BUILD_ARCH" )
+        test -z "$ABUILD_TARGET" || echo "build target is $ABUILD_TARGET"
+    fi
+    if test -n "$ABUILD_TARGET" ; then
+	DSC_BUILD_CMD="$DSC_BUILD_CMD --host-type $ABUILD_TARGET"
+    fi
+    if test -n "$ABUILD_TARGET" -a -d "$BUILD_ROOT/.build.sysroot" ; then
+	DSC_BUILD_CMD="$DSC_BUILD_CMD -Pcross,nocheck"
+	DSC_BUILD_OPTIONS="$DSC_BUILD_OPTIONS nocheck"
+	DSC_BUILD_OPTIONS="${DSC_BUILD_OPTIONS# }"
+    fi
 
     chroot $buildroot su -c "export DEB_BUILD_OPTIONS=${DSC_BUILD_OPTIONS} ; cd $TOPDIR/BUILD && $DSC_BUILD_CMD" - $BUILD_USER < /dev/null && BUILD_SUCCEEDED=true
     if test "$BUILD_SUCCEEDED" = true -a "$DO_CHECKS" != "false" && ( chroot $buildroot su -c "which lintian > /dev/null" - $BUILD_USER < /dev/null ); then