image.bbclass: Allow to remove do_rootfs -> virtual/kernel:do_package…

…data dependency

* this is causing dependency loops in some cases
  e.g. linux-hp-tenderloin depends on initramfs-android-image, but
    commit 41f0f86
    Author: Richard Purdie <richard.purdie@linuxfoundation.org>
    Date:   Tue Jan 27 15:24:52 2015 +0000
    Subject: image: Add missing depends on virtual/kernel for depmod data
  adds also dependency between <image>.do_rootfs and virtual/kernel:do_packagedata
  causing this dependency loop:

Dependency loop #1 found:
  Task 78 (meta-smartphone/meta-hp/recipes-kernel/linux/linux-hp-tenderloin_git.bb, do_install)
    (dependent Tasks ['linux-hp-tenderloin, do_compile',
                      'pseudo, do_populate_sysroot'])
  Task 88 (meta-smartphone/meta-hp/recipes-kernel/linux/linux-hp-tenderloin_git.bb, do_package)
    (dependent Tasks ['rpm, do_populate_sysroot',
                      'pseudo, do_populate_sysroot',
                      'linux-hp-tenderloin, do_install',
                      'initramfs-android-image.bb, do_packagedata',
                      'glibc, do_packagedata',
                      'file, do_populate_sysroot',
                      'gcc-runtime, do_packagedata'])
  Task 89 (meta-smartphone/meta-hp/recipes-kernel/linux/linux-hp-tenderloin_git.bb, do_package_write_ipk)
    (dependent Tasks ['linux-hp-tenderloin, do_package',
                      'opkg-utils, do_populate_sysroot',
                      'linux-hp-tenderloin, do_packagedata',
                      'pseudo, do_populate_sysroot'])
  Task 560 (meta-smartphone/meta-android/recipes-core/images/initramfs-android-image.bb, do_rootfs)
    (dependent Tasks ['bash, do_package_write_ipk',
                      'run-postinsts, do_package_write_ipk',
                      'db, do_package_write_ipk',
                      'update-rc.d, do_populate_sysroot',
                      'android-tools-conf, do_package_write_ipk',
		      'base-passwd, do_package_write_ipk',
                      'initramfs-boot-android, do_package_write_ipk',
		      'expat, do_package_write_ipk',
                      'bzip2, do_packagedata',
		      'glibc-initial, do_packagedata',
                      'openssl, do_package_write_ipk',
                      'bzip2, do_package_write_ipk',
		      'busybox, do_packagedata',
                      'zlib, do_packagedata',
		      'qemuwrapper-cross, do_packagedata',
                      'base-passwd, do_packagedata',
		      'busybox, do_package_write_ipk',
                      'zlib, do_package_write_ipk',
		      'qemuwrapper-cross, do_package_write_ipk',
		      'gcc-runtime, do_package_write_ipk',
		      'gettext, do_packagedata',
		      'initramfs-boot-android, do_packagedata',
		      'gettext, do_package_write_ipk',
		      'libgcc-initial, do_packagedata',
                      'expat, do_packagedata',
                      'gdbm, do_packagedata',
		      'depmodwrapper-cross, do_package_write_ipk',
                      'libgcc-initial, do_package_write_ipk',
                      'glibc-initial, do_package_write_ipk',
                      'linux-libc-headers, do_packagedata',
                      'glibc, do_packagedata',
                      'initramfs-android-image.bb, do_packagedata',
                      'glibc, do_package_write_ipk',
                      'sqlite3, do_packagedata',
                      'initramfs-android-image.bb, do_package_write_ipk',
                      'sqlite3, do_package_write_ipk',
                      'android-tools-conf, do_packagedata',
                      'ncurses, do_packagedata',
                      'openssl, do_packagedata',
                      'android-tools, do_packagedata',
                      'ncurses, do_package_write_ipk',
                      'cryptodev-linux, do_packagedata',
                      'android-tools, do_package_write_ipk',
                      'pseudo, do_populate_sysroot',
                      'cryptodev-linux, do_package_write_ipk',
                      'linux-libc-headers, do_package_write_ipk',
                      'depmodwrapper-cross, do_packagedata',
                      'linux-hp-tenderloin, do_packagedata',
                      'readline, do_package_write_ipk',
                      'opkg-utils, do_packagedata',
                      'linux-hp-tenderloin, do_package_write_ipk',
                      'python, do_packagedata',
                      'gdbm, do_package_write_ipk',
                      'opkg, do_populate_sysroot',
                      'python, do_package_write_ipk',
                      'libtool-cross, do_packagedata',
                      'db, do_packagedata',
                      'libgcc, do_packagedata',
                      'libtool-cross, do_package_write_ipk',
                      'update-rc.d, do_packagedata',
                      'update-rc.d, do_package_write_ipk',
                      'libgcc, do_package_write_ipk',
                      'opkg-utils, do_populate_sysroot',
                      'makedevs, do_populate_sysroot',
                      'readline, do_packagedata',
                      'base-files, do_packagedata',
                      'gcc-runtime, do_packagedata',
                      'opkg-utils, do_package_write_ipk',
                      'base-files, do_package_write_ipk',
                      'ldconfig-native, do_populate_sysroot',
                      'bash, do_packagedata',
                      'run-postinsts, do_packagedata'])
  Task 82 (meta-smartphone/meta-hp/recipes-kernel/linux/linux-hp-tenderloin_git.bb, do_compile)
    (dependent Tasks ['initramfs-android-image.bb, do_rootfs',
                      'linux-hp-tenderloin, do_configure'])

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/classes/image.bbclass

@@ -76,10 +76,17 @@ LDCONFIGDEPEND ?= "ldconfig-native:do_populate_sysroot"
 LDCONFIGDEPEND_libc-uclibc = ""
 LDCONFIGDEPEND_libc-musl = ""
 
+# This is needed to have depmod data in PKGDATA_DIR,
+# but if you're building small initramfs image
+# e.g. to include it in your kernel, you probably
+# don't want this dependency, which is causing dependency loop
+KERNELDEPMODDEPEND ?= "virtual/kernel:do_packagedata"
+
 do_rootfs[depends] += " \
     makedevs-native:do_populate_sysroot virtual/fakeroot-native:do_populate_sysroot ${LDCONFIGDEPEND} \
     virtual/update-alternatives-native:do_populate_sysroot update-rc.d-native:do_populate_sysroot \
-    virtual/kernel:do_packagedata"
+    ${KERNELDEPMODDEPEND} \
+"
 do_rootfs[recrdeptask] += "do_packagedata"
 
 def command_variables(d):