image.bbclass: Add support to build the SDK in parallel with the image

When building an image recipe, you can now build a companion SDK by
calling the populate_sdk task:
  bitbake -c populate_sdk core-image-minimal

Note: there are still issues w/ the SDK not working completely with
multilibs.

A lock is required between rootfs and populate_sdk activities to prevent
configuration file clashes and similar package management problems in ipk
and deb based systems.  (RPM already had a lock for a different reason.)

(From OE-Core rev: a0de2a56f19ae4d8cd88e46e96917a7a019fe1ab)

Signed-off-by: Mark Hatle <mark.hatle@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/classes/image.bbclass

@@ -3,6 +3,11 @@ inherit rootfs_${IMAGE_PKGTYPE}
 IMAGETEST ?= "dummy"
 inherit imagetest-${IMAGETEST}
 
+inherit populate_sdk_base
+
+TOOLCHAIN_TARGET_TASK += "${PACKAGE_INSTALL}"
+TOOLCHAIN_TARGET_TASK_ATTEMPTONLY += "${PACKAGE_INSTALL_ATTEMPTONLY} ${PACKAGE_GROUP_dev-pkgs} ${PACKAGE_GROUP_dbg-pkgs}"
+
 inherit gzipnative
 
 LICENSE = "MIT"

meta/classes/populate_sdk_base.bbclass

@@ -120,6 +120,7 @@ populate_sdk_log_check() {
 	done
 }
 
+do_populate_sdk[dirs] = "${TOPDIR}"
 do_populate_sdk[nostamp] = "1"
 do_populate_sdk[depends] = "${@' '.join([x + ':do_populate_sysroot' for x in d.getVar('SDK_DEPENDS', True).split()])}"
 do_populate_sdk[rdepends] = "${@' '.join([x + ':do_populate_sysroot' for x in d.getVar('SDK_RDEPENDS', True).split()])}"

meta/classes/populate_sdk_deb.bbclass

@@ -6,6 +6,8 @@ DEB_SDK_ARCH = "${@[d.getVar('SDK_ARCH', True), "i386"]\
                 [d.getVar('SDK_ARCH', True) in \
                 ["x86", "i486", "i586", "i686", "pentium"]]}"
 
+do_populate_sdk[lockfiles] += "${WORKDIR}/deb.lock"
+
 populate_sdk_post_deb () {
 
 	local target_rootfs=$1

meta/classes/populate_sdk_ipk.bbclass

@@ -1,6 +1,8 @@
 do_populate_sdk[depends] += "opkg-native:do_populate_sysroot opkg-utils-native:do_populate_sysroot"
 do_populate_sdk[recrdeptask] += "do_package_write_ipk"
 
+do_populate_sdk[lockfiles] += "${WORKDIR}/ipk.lock"
+
 populate_sdk_ipk() {
 
 	rm -f ${IPKGCONF_TARGET}

meta/classes/rootfs_deb.bbclass

@@ -8,6 +8,8 @@ ROOTFS_PKGMANAGE_BOOTSTRAP  = "run-postinsts"
 do_rootfs[depends] += "dpkg-native:do_populate_sysroot apt-native:do_populate_sysroot"
 do_rootfs[recrdeptask] += "do_package_write_deb"
 
+do_rootfs[lockfiles] += "${WORKDIR}/deb.lock"
+
 DEB_POSTPROCESS_COMMANDS = "rootfs_install_all_locales; "
 
 opkglibdir = "${localstatedir}/lib/opkg"

meta/classes/rootfs_ipk.bbclass

@@ -12,6 +12,8 @@ ROOTFS_PKGMANAGE_BOOTSTRAP  = "run-postinsts"
 do_rootfs[depends] += "opkg-native:do_populate_sysroot opkg-utils-native:do_populate_sysroot"
 do_rootfs[recrdeptask] += "do_package_write_ipk"
 
+do_rootfs[lockfiles] += "${WORKDIR}/ipk.lock"
+
 IPKG_ARGS = "-f ${IPKGCONF_TARGET} -o ${IMAGE_ROOTFS} --force-overwrite"
 
 OPKG_PREPROCESS_COMMANDS = "package_update_index_ipk; package_generate_ipkg_conf"