cmake-native-dummy.bbclass: initial add

Some CMake projects make references on executables they create. These
references are absolut and therefore CMake complains when using in depending
packages. To have a valid reference we create a dummy binary in native sysroot
(cross sysroot cannot not contain executables by oe design).

Note this will not work for references really used - we do that only for
CMake's over enthusiatic behaviour to check all files referenced regardless
these files are used or not.

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

classes/cmake-native-dummy.bbclass

@@ -0,0 +1,22 @@
+#
+# Class to create dummy native binaries so cmake can reference them
+# Inspired by binconfig-disabled.bbclass
+#
+
+inherit native
+
+# The list of scripts which should be disabled.
+CMAKE_DUMMY_BINARIES ?= ""
+
+do_install () {
+    install -d ${D}${bindir}
+    for x in ${CMAKE_DUMMY_BINARIES}; do
+        echo "#!/bin/sh" > ${D}${bindir}/$x
+        # Make the disabled script emit invalid parameters for those configure
+        # scripts which call it without checking the return code.
+        echo "echo '--should-not-have-used-$x'" >> ${D}${bindir}/$x
+        echo "exit 1" >> ${D}${bindir}/$x
+        chmod 755 ${D}${bindir}/$x
+    done
+}
+