meta-toolchain: introduce TOOLCHAIN_TARGET_EXCLUDE to uninstall unneeded deps

TOOLCHAIN_TARGET_EXCLUDE is a list of packages to uninstall from the target
portion of meta-toolchain/SDK, which were brought as dependencies, but not
needed in the SDK.
Useful to have only relevant libPKG and PKG-dev packages with libs and headers
installed, while keeping the main PKG package with binaries out.

Signed-off-by: Denys Dmytriyenko <denis@denix.org>

diff --git a/recipes/meta/meta-toolchain.bb b/recipes/meta/meta-toolchain.bb
index e09778f..a8c27ec 100644 (file)
--- a/recipes/meta/meta-toolchain.bb
+++ b/recipes/meta/meta-toolchain.bb
@@ -14,6 +14,7 @@ IPKG_TARGET = "opkg-cl -f ${IPKGCONF_TARGET} -o ${SDK_OUTPUT}/${SDKPATH}/${TARGE
 
 TOOLCHAIN_HOST_TASK ?= "task-sdk-host"
 TOOLCHAIN_TARGET_TASK ?= "task-sdk-bare"
+TOOLCHAIN_TARGET_EXCLUDE ?= ""
 FEED_ARCH ?= "${TARGET_ARCH}"
 SDK_SUFFIX = "toolchain"
 TOOLCHAIN_OUTPUTNAME ?= "${DISTRO}-${DISTRO_VERSION}-${FEED_ARCH}-${TARGET_OS}-${SDK_SUFFIX}"
@@ -56,10 +57,18 @@ do_populate_sdk() {
        ${IPKG_TARGET} update
        ${IPKG_TARGET} install ${TOOLCHAIN_TARGET_TASK}
 
+       # Remove packages in the exclude list which were installed by dependencies
+       if [ ! -z "${TOOLCHAIN_TARGET_EXCLUDE}" ]; then
+               ${IPKG_TARGET} remove -force-depends ${TOOLCHAIN_TARGET_EXCLUDE}
+       fi
+
        install -d ${SDK_OUTPUT}/${SDKPATH}/usr/lib/opkg
        mv ${SDK_OUTPUT}/usr/lib/opkg/* ${SDK_OUTPUT}/${SDKPATH}/usr/lib/opkg/
        rm -Rf ${SDK_OUTPUT}/usr/lib
 
+       # Clean up empty directories from excluded packages
+       find ${SDK_OUTPUT} -depth -type d -empty -print0 | xargs -0 /bin/rmdir
+
        install -d ${SDK_OUTPUT}/${SDKPATH}/${TARGET_SYS}/${sysconfdir}
        install -m 0644 ${IPKGCONF_TARGET} ${IPKGCONF_SDK} ${SDK_OUTPUT}/${SDKPATH}/${TARGET_SYS}/${sysconfdir}/