This layer provides clang/llvm as alternative to your system C/C++ compiler for OpenEmbedded based distributions along with gcc

git clone git://github.com/openembedded/openembedded-core.git
cd openembeeded-core
git clone git://github.com/openembedded/bitbake.git
git clone git://github.com/kraj/meta-clang.git

$ . ./oe-init-build-env

Edit conf/bblayers.conf to add meta-clang to layer mix e.g.

BBLAYERS ?= " \
  /home/kraj/openembedded-core/meta-clang \
  /home/kraj/openembedded-core/meta \
  "

Note that by default gcc will remain the system compiler, however if you wish clang to be the default compiler then set

TOOLCHAIN ?= "clang"

in local.conf, this would now switch to using clang as default compiler systemwide you can select clang per package too by writing bbappends for them containing

TOOLCHAIN = "clang"

Below we build for qemuarm machine as an example

$ MACHINE=qemux86 bitbake core-image-minimal

$ runqemu qemux86

Few components do not build with clang, if you have a component to add to that list simply add it to conf/nonclangable.inc e.g.

TOOLCHAIN_pn-<recipe> = "gcc"

and OE will start using gcc to cross compile that recipe,

URI: git://github.com/openembedded/openembedded-core.git
branch: master
revision: HEAD

URI: git://github.com/openembedded/bitbake.git
branch: master
revision: HEAD

Send pull requests to [email protected] with '[meta-clang]' in the subject'

When sending single patches, please use something like:

'git send-email -M -1 --to [email protected] --subject-prefix=meta-clang][PATCH'

You are encouraged to fork the mirror on github to share your patches, this is preferred for patch sets consisting of more than one patch. Other services like gitorious, repo.or.cz or self hosted setups are of course accepted as well, 'git fetch ' works the same on all of them. We recommend github because it is free, easy to use, has been proven to be reliable and has a really good web GUI.

Layer Maintainer: Khem Raj