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Or is this not always the case? Jan > Using DEPENDS instead of RDEPENDS ensures creation of > pregenerated kernel config before build of target specific linux-kbuild > > Signed-off-by: Stefan Koch > --- > .../linux/files/debian/control.tmpl | 8 ++++++++ > .../linux/files/debian/isar/common.tmpl | 2 ++ > .../linux/files/debian/isar/configure.tmpl | 18 ++++++++++++++---- > .../linux/files/debian/isar/install.tmpl | 15 +++++++++++++++ > meta/recipes-kernel/linux/linux-custom.inc | 14 +++++++++----- > 5 files changed, 48 insertions(+), 9 deletions(-) > > diff --git a/meta/recipes-kernel/linux/files/debian/control.tmpl b/meta/recipes-kernel/linux/files/debian/control.tmpl > index e0e932a0..fa2b4e12 100644 > --- a/meta/recipes-kernel/linux/files/debian/control.tmpl > +++ b/meta/recipes-kernel/linux/files/debian/control.tmpl > @@ -50,6 +50,14 @@ Description: Linux kernel debugging symbols for @KR@ > This package will come in handy if you need to debug the kernel. It provides > all the necessary debug symbols for the kernel and its modules. > > +Package: linux-config-${KERNEL_NAME_PROVIDED} > +Build-Profiles: > +Architecture: all > +Depends: ${perl:Depends}, ${shlib:Depends} > +Description: ${KERNEL_NAME_PROVIDED} Linux kernel config for @KR@ > + This package provides the kernel config for @KR@ > + The target specific linux-kbuild package benefits from a reduced build time. > + > Package: linux-kbuild-${KERNEL_NAME_PROVIDED} > Build-Profiles: > Architecture: any > diff --git a/meta/recipes-kernel/linux/files/debian/isar/common.tmpl b/meta/recipes-kernel/linux/files/debian/isar/common.tmpl > index 86af70c5..6666c414 100644 > --- a/meta/recipes-kernel/linux/files/debian/isar/common.tmpl > +++ b/meta/recipes-kernel/linux/files/debian/isar/common.tmpl > @@ -10,6 +10,7 @@ KERNEL_PKG_IMAGE=linux-image-${KERNEL_NAME_PROVIDED} > KERNEL_PKG_KERN_HEADERS=linux-headers-${KERNEL_NAME_PROVIDED} > KERNEL_PKG_LIBC_HEADERS=linux-libc-dev > KERNEL_PKG_LIBC_HEADERS_CROSS=linux-libc-dev-${DISTRO_ARCH}-cross > +KERNEL_PKG_KERN_CONFIG=linux-config-${KERNEL_NAME_PROVIDED} > KERNEL_PKG_KERN_KBUILD=linux-kbuild-${KERNEL_NAME_PROVIDED} > KERNEL_PKG_KERN_KBUILD_CROSS=${KERNEL_PKG_KERN_KBUILD}-${DISTRO_ARCH}-cross > > @@ -32,6 +33,7 @@ deb_dbg_dir=${deb_img_dir}-dbg > deb_kern_hdr_dir=${deb_top_dir}/${KERNEL_PKG_KERN_HEADERS} > deb_libc_hdr_dir=${deb_top_dir}/${KERNEL_PKG_LIBC_HEADERS} > deb_libc_hdr_cross_dir=${deb_top_dir}/${KERNEL_PKG_LIBC_HEADERS_CROSS} > +deb_kern_config_dir=${deb_top_dir}/${KERNEL_PKG_KERN_CONFIG} > deb_kern_kbuild_dir=${deb_top_dir}/${KERNEL_PKG_KERN_KBUILD} > deb_kern_kbuild_cross_dir=${deb_top_dir}/${KERNEL_PKG_KERN_KBUILD_CROSS} > > diff --git a/meta/recipes-kernel/linux/files/debian/isar/configure.tmpl b/meta/recipes-kernel/linux/files/debian/isar/configure.tmpl > index 389c9a85..19797b84 100644 > --- a/meta/recipes-kernel/linux/files/debian/isar/configure.tmpl > +++ b/meta/recipes-kernel/linux/files/debian/isar/configure.tmpl > @@ -10,10 +10,20 @@ do_configure() { > # Trace what we do here > set -x > > - # Process kernel config target and fragments > - ${MAKE} O=${KERNEL_BUILD_DIR} ${KERNEL_CONFIG_TARGET} > - ./scripts/kconfig/merge_config.sh -O ${KERNEL_BUILD_DIR}/ \ > - ${KERNEL_BUILD_DIR}/.config ${KERNEL_CONFIG_FRAGMENTS} > + configdir=/usr/lib/linux-config-${PV} > + if [ -e ${configdir}/kernelconfig ]; then > + # Prefer pregenerated kernel config > + # So, very expensive QEMU-emulated merge_config.sh > + # can be skipped for target specific linux-kbuild package > + mkdir -p ${KERNEL_BUILD_DIR} > + cp ${configdir}/kernelconfig ${KERNEL_BUILD_DIR}/.config > + ${MAKE} O=${KERNEL_BUILD_DIR} olddefconfig > + else > + # Process kernel config target and fragments > + ${MAKE} O=${KERNEL_BUILD_DIR} ${KERNEL_CONFIG_TARGET} > + ./scripts/kconfig/merge_config.sh -O ${KERNEL_BUILD_DIR}/ \ > + ${KERNEL_BUILD_DIR}/.config ${KERNEL_CONFIG_FRAGMENTS} > + fi > > # Stop tracing > set +x > diff --git a/meta/recipes-kernel/linux/files/debian/isar/install.tmpl b/meta/recipes-kernel/linux/files/debian/isar/install.tmpl > index 00011517..3387671c 100644 > --- a/meta/recipes-kernel/linux/files/debian/isar/install.tmpl > +++ b/meta/recipes-kernel/linux/files/debian/isar/install.tmpl > @@ -33,6 +33,13 @@ do_install() { > # Trace what we do here > set -x > > + if echo "${DEB_BUILD_PROFILES}" | grep -q "kconfig"; then > + # Install kernel config > + # The target specific linux-kbuild package can speedup > + # the build using this pregenerated kernel config > + install_kconf ${deb_kern_config_dir} > + fi > + > if echo "${DEB_BUILD_PROFILES}" | grep -q "kbuild"; then > # Install kernel scripts and tools > if echo "${DEB_BUILD_PROFILES}" | grep -q "cross"; then > @@ -223,6 +230,14 @@ install_headers() { > kernel_headers > } > > +install_kconf() { > + kernel_kconf_dir=usr/lib/linux-config-${PV} > + destdir=${1}/${kernel_kconf_dir} > + > + mkdir -p ${destdir} > + cp ${O}/${KCONF} ${destdir}/kernelconfig > +} > + > install_kbuild() { > kernel_kbuild_dir=usr/lib/linux-kbuild-${krel} > destdir=${1}/${kernel_kbuild_dir} > diff --git a/meta/recipes-kernel/linux/linux-custom.inc b/meta/recipes-kernel/linux/linux-custom.inc > index 647f09dd..b21a90f3 100644 > --- a/meta/recipes-kernel/linux/linux-custom.inc > +++ b/meta/recipes-kernel/linux/linux-custom.inc > @@ -25,6 +25,7 @@ KBUILD_DEPENDS ?= "build-essential:native, \ > flex, \ > git, \ > kmod, \ > + linux-config-${KERNEL_NAME_PROVIDED} , \ > rsync," > > KERNEL_DEBIAN_DEPENDS ?= "initramfs-tools | linux-initramfs-tool, \ > @@ -106,14 +107,14 @@ python() { > } > > # Default profiles and provides > -BUILD_PROFILES = "kernel kbuild" > +BUILD_PROFILES = "kernel kconfig kbuild" > > # We only offer the -kbuildtarget variant when actually cross compiling > BBCLASSEXTEND:append:cross-profile = " kbuildtarget" > > # When cross-profile is active: > -# build only kernel with the default variant of the recipe > -BUILD_PROFILES:cross-profile = "kernel" > +# build only kernel and package config with the default variant of the recipe > +BUILD_PROFILES:cross-profile = "kernel kconfig" > > # -native: kbuild package for host > BUILD_PROFILES:class-native = "kbuild" > @@ -122,14 +123,17 @@ RECIPE_PROVIDES:class-native = " \ > linux-kbuild-${KERNEL_NAME_PROVIDED}" > # Use pseudo target to pull in the base variant of the recipe. > # Will be auto-extended with -native by multiarch.bbclass. > -RDEPENDS:class-native += "${BPN}-pseudo" > +# Using DEPENDS, see below > +DEPENDS:class-native += "${BPN}-pseudo" > > # -kbuildtarget: kbuild package for target, enforcing non-cross-build > BUILD_PROFILES:class-kbuildtarget = "kbuild" > RECIPE_PROVIDES:class-kbuildtarget = " \ > linux-headers-${KERNEL_NAME_PROVIDED} \ > linux-kbuild-${KERNEL_NAME_PROVIDED}" > -RDEPENDS:class-kbuildtarget = "${BPN}" > +# Using DEPENDS instead of RDEPENDS to ensure creation of pregenerated > +# kernel config before build of target specific linux-kbuild package > +DEPENDS:class-kbuildtarget = "${BPN}" > ISAR_CROSS_COMPILE:class-kbuildtarget = "0" > > # Make bitbake know we will be producing linux-image and linux-headers packages -- Siemens AG, Technology Linux Expert Center