a first README to describe the current state

README.af_yocto

+PURPOSE:
+  This document describes the installation, use and content of the git repository af_yocto.
+
+
+INSTALLATION and USE:
+
+  The repository only contains our contributions to the existing yocto poky-danny-8.0 archive.
+  To obtain all files, unpack http://downloads.yoctoproject.org/releases/yocto/yocto-1.3/poky-danny-8.0.tar.bz2 into this repository.
+
+  The commands
+    source oe-init-build-env
+    bitbake core-image-bmw
+  builds our specifically configured linux image.
+  
+  With `runqemu qemux86-64 core-image-bmw` the linux image runs within a virtual machine.
+  
+  We assume that this is running on and compiled for an x86-64 architecture. For other architectures, some settings must be adjusted.
+
+CONTENT of the repository:
+
+  .gitignore   list of filenames of the poky-danny-8.0 release to ignore. Adjust file to track newly added recipes.
+  build/conf/bblayers.conf   setting files for building image
+  build/conf/local.conf
+  meta/recipes-core/images/core-image-bmw.bb   recipe for our own core image (derived from core-image-minimal)
+  meta/recipes-devtools/python/python-pyyaml_3.10.bb   recipe for pyyaml python library
+  meta/recipes-devtools/python/python-rospkg_1.0.15.bb   recipe for rospkg tool
+
+OPEN ISSUES:
+  - recipes for python-pyyaml and python-rospkg create invalid shell scripts
+    (header line refers to python-native instead of python.)
+  - Yocto: python-setuptools requires python-modules at run-time.
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