diff options
| -rw-r--r-- | meta/classes/kernel-alt-headers.bbclass | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/meta/classes/kernel-alt-headers.bbclass b/meta/classes/kernel-alt-headers.bbclass new file mode 100644 index 00000000000..e749242ef8c --- /dev/null +++ b/meta/classes/kernel-alt-headers.bbclass @@ -0,0 +1,78 @@ +PACKAGE_ARCH = "${MACHINE_ARCH}" + +# +# Provide alternate uapi headers from a kernel, for use by +# a recipe. This is *not* a replacement for the linux-libc-headers +# package, but is expected to be used when a package is tightly +# coupled to a specific kernel and needs definitions / interfaces +# specific to that kernel. +# +# The class works in one of two ways, it can be included by the +# recipe that requires the headers (mode 1 below) or by a kernel +# recipe that provides the alternate headers. Both are valid, +# and one may be chosen over the other depending on how many +# packages need custom headers, etc. +# +# It is up to the package that builds against these headers to +# ensure that the alternate kernel headers are in the include +# path and used for the build. +# +# mode 1: included directly from a recipe that needs alternate +# kernel headers. In this mode the headers install from +# the shared kernel dir to WORKDIR. +# Note: in this mode, the kernel doesn't (or shouldn't) +# inherit kernel-alt-headers itself. +# +# The headers will be in: $WORKDIR/usr/alt-headers +# +# mode 2: included by a kernel recipe to provide alt-headers. +# In this mode, the kernel build/install is modified to +# stage the headers to the sysroot (and create a +# kernel-headers-alt package). +# +# The headers are found in: recipe-sysroot/usr/alt-headers +# +inherit kernel-arch + +KERNEL_ALT_HEADER_DIR ?= "/usr/alt-headers/" +DEPENDS += "unifdef-native bison-native rsync-native" + +KERNEL_SOURCE_IS_LOCAL ?= "${@(bb.data.inherits_class('kernel', d))}" +python __anonymous () { + if not bb.data.inherits_class('kernel',d): + d.appendVar( 'DEPENDS', " virtual/kernel" ) + else: + # We need to package these up, even if they aren't expected to be + # used for anything + d.appendVar( 'PACKAGES', " ${KERNEL_PACKAGE_NAME}-headers-alt" ) + d.setVar( 'FILES:${KERNEL_PACKAGE_NAME}-headers-alt', "${KERNEL_ALT_HEADER_DIR}" ) +} + +do_compile:prepend() { + if [ "${KERNEL_SOURCE_IS_LOCAL}" = "False" ]; then + # install from the staging kernel directory + oe_runmake -C ${STAGING_KERNEL_DIR} headers_install INSTALL_HDR_PATH=${WORKDIR}/${KERNEL_ALT_HEADER_DIR} + # there have been reports that menuconfig won't run due to a dirty + # kernel directory after the install, so we run mrproper to make sure + # it is clean + oe_runmake -C ${STAGING_KERNEL_DIR} mrproper + fi +} + +do_install:append() { + if [ "${KERNEL_SOURCE_IS_LOCAL}" = "True" ]; then + # install to our deploy directory, this will be packaged and staged + oe_runmake headers_install INSTALL_HDR_PATH=${D}${KERNEL_ALT_HEADER_DIR} + + # remove export artifacts + find ${D}${KERNEL_ALT_HEADER_DIR} -name .install -exec rm {} \; + find ${D}${KERNEL_ALT_HEADER_DIR} -name ..install.cmd -exec rm {} \; + fi +} + +sysroot_stage_all:append() { + if [ "${KERNEL_SOURCE_IS_LOCAL}" = "True" ]; then + mkdir -p ${SYSROOT_DESTDIR}${KERNEL_ALT_HEADER_DIR} + cp -r ${D}${KERNEL_ALT_HEADER_DIR}/* ${SYSROOT_DESTDIR}/${KERNEL_ALT_HEADER_DIR} + fi +} |