add cmake-extra-sanity.bbclass: error out do_install if /usr//usr is found in image

add inherit in kde-base.bbclass

Signed-off-by: Andreas Müller <schnitzeltony@googlemail.com>

classes/cmake-extra-sanity.bbclass

@@ -0,0 +1,9 @@
+do_install_append() {
+    # avoid strange prefixing seen often
+    old_dir=`pwd`
+    cd ${D}
+    if grep -qr 'usr\/\/usr' ; then
+        bbfatal 'usr//usr found in ${PN} - check sources for PREFIX or better CMAKE_INSTALL_PREFIX!'
+    fi
+    cd $old_dir
+}

classes/kde-base.bbclass

@@ -6,7 +6,7 @@ KDE_BRANCH ?= "master"
 SRC_URI = "git://anongit.kde.org/${BPN};protocol=git;branch=${KDE_BRANCH}"
 
 # extra-cmake-modules cause dependent to check for python
-inherit cmake_qt5 pythonnative
+inherit cmake_qt5 cmake-extra-sanity pythonnative
 
 FILES_${PN} += "${libdir}/plugins/kf5 ${datadir}/kf5"
 FILES_${PN}-dev += "${libdir}/cmake"