Cross compilation on MacOS

This is a first attempt to support Cross compilation of VPP on MacOS for development (linting, completion, compile_commands.json)

Prerequisites

  • You’ll need to install the following packages

$ pip3 install ply pyyaml jsonschema
$ brew install diffutils gnu-sed pkg-config ninja crosstool-ng

  • You’ll also need to install gnu-ident 2.2.11 to be able to make checkstyle. This can be done with this doc

  • You should link the binaries to make them available in your path with their original names e.g. :

$ ln -s $(which gsed) /usr/local/bin/sed
$ ln -s $(which gindent) /usr/local/bin/indent
$ ln -s /usr/local/Cellar/diffutils/3.7/bin/diff /usr/local/bin/diff

Setup

  • Create a cross compile toolchain

  • Create a case sensitive volume and mount the toolchain in it e.g. in /Volumes/xchain

  • Create a xchain.toolchain file with $VPP_DIR/extras/scripts/cross_compile_macos.sh conf /Volumes/xchan

For now we don’t support e-build so dpdk, rdma, quicly won’t be compiled as part of make build

To build with the toolchain do:

$ $VPP_DIR/extras/scripts/cross_compile_macos.sh build

To get the compile_commands.json do

$ $VPP_DIR/extras/scripts/cross_compile_macos.sh cc
$ >> ./build-root/build-vpp[_debug]-native/vpp/compile_commands.json

This should build vpp on MacOS

Good luck :)

Installing indent 2.2.11

In order to install indent on macos :

$ wget http://mirror.sergal.org/gnu/indent/indent-2.2.11.tar.gz
$ tar -xzvf indent-2.2.11.tar.gz
$ cd indent-2.2.11
$ ./configure --disable-dependency-tracking --disable-debug --program-prefix=g --prefix=/usr/local/Cellar/gnu-indent/2.2.11

Install will exit with an error code, but indent 2.2.11 will still be installed in /usr/local/bin/gindent Other mirrors can be found on the GNU website