xen: Fix menuconfig and add support for config fragments and diffconfig

This patch introduces the following changes:

1. When building in OE environment the linker path needs to be passed when
   buildind the Kconfig tool in order to get the menuconfig task properly
   working.

2. By inheriting cml1.bbclass we can drop some environment variables
   settings in xen-hypervisor.inc for the menuconfig task, and also be
   able to search for config fragmens and use the diffconfig task. Also,
   there is no need to have a custom do_menuconfig task anymore.

Change-Id: I8d61ec76d92de7d1613b79edf55b4868fe712334
Signed-off-by: Diego Sueiro <diego.sueiro@arm.com>
Signed-off-by: Bruce Ashfield <bruce.ashfield@gmail.com>

1 files changed, 19 insertions, 30 deletions

diff --git a/recipes-extended/xen/xen-hypervisor.inc b/recipes-extended/xen/xen-hypervisor.inc
index c386917d..3bfee8ee 100644
--- a/recipes-extended/xen/xen-hypervisor.inc
+++ b/recipes-extended/xen/xen-hypervisor.inc
@@ -9,7 +9,7 @@ DESCRIPTION = "The Xen hypervisor"
 # The Xen hypervisor has a narrower compatible platform range than the Xen tools
 COMPATIBLE_HOST = '(x86_64.*).*-linux|aarch64.*-linux|arm-.*-linux-gnueabi'
 
-inherit deploy python3native
+inherit deploy python3native cml1
 
 PACKAGES = " \
     ${PN} \
@@ -34,6 +34,18 @@ FILES_${PN}-efi = " \
 
 do_configure() {
     do_configure_common
+
+    # Handle the config fragments
+    cfgs="${@' '.join(find_cfgs(d))}"
+    if [ -n "${cfgs}" ]; then
+        # If .config is not present generate one in order
+        # to use the merge_config.sh
+        if [ ! -f "${S}/xen/.config" ] ; then
+            oe_runmake -C ${S}/xen defconfig
+        fi
+        ${S}/xen/tools/kconfig/merge_config.sh -m -O \
+            ${S}/xen ${S}/xen/.config "${cfgs}"
+    fi
 }
 
 do_compile() {
@@ -77,35 +89,12 @@ do_deploy[depends] += "xen-tools:do_populate_sysroot"
 do_deploy[depends] += "xen-tools:do_deploy"
 
 # Enable use of menuconfig directly from bitbake and also within the devshell
-OE_TERMINAL_EXPORTS += "HOST_EXTRACFLAGS HOSTLDFLAGS TERMINFO"
-HOST_EXTRACFLAGS = "${BUILD_CFLAGS} ${BUILD_LDFLAGS}"
-HOSTLDFLAGS = "${BUILD_LDFLAGS}"
-TERMINFO = "${STAGING_DATADIR_NATIVE}/terminfo"
 do_devshell[depends] += "ncurses-native:do_populate_sysroot"
 
-KCONFIG_CONFIG_COMMAND ??= "menuconfig"
-python do_menuconfig() {
-    import shutil
-
-    try:
-        mtime = os.path.getmtime("xen/.config")
-        shutil.copy("xen/.config", "xen/.config.orig")
-    except OSError:
-        mtime = 0
+# Pass the native library path for kconfig build when running the do_menuconfig
+# task
+CROSS_CURSES_LIB += "-L${STAGING_LIBDIR_NATIVE}"
 
-    oe_terminal("${SHELL} -c \"cd xen; XEN_CONFIG_EXPERT=y make %s; if [ \$? -ne 0 ]; then echo 'Command failed.'; printf 'Press any key to continue... '; read r; fi\"" % d.getVar('KCONFIG_CONFIG_COMMAND'),
-        d.getVar('PN') + ' Configuration', d)
-
-    try:
-        newmtime = os.path.getmtime("xen/.config")
-    except OSError:
-        newmtime = 0
-
-    if newmtime > mtime:
-        bb.note("Configuration changed, recompile will be forced")
-        bb.build.write_taint('do_compile', d)
-}
-do_menuconfig[depends] += "ncurses-native:do_populate_sysroot"
-do_menuconfig[nostamp] = "1"
-do_menuconfig[dirs] = "${B}"
-addtask menuconfig after do_configure
+# Specify the root dir of the .config file for do_menuconfig and do_diffconfig
+# tasks
+KCONFIG_CONFIG_ROOTDIR = "${S}/xen"