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Compdb (compile_commands.json) Generator

Soong can generate compdb files. This is intended for use with editing tools such as YouCompleteMe and other libclang based completers.

compdb file generation is enabled via environment variable:

$ export SOONG_GEN_COMPDB=1
$ export SOONG_GEN_COMPDB_DEBUG=1

One can make soong generate a symlink to the compdb file using an environment variable:

$ export SOONG_LINK_COMPDB_TO=$ANDROID_HOST_OUT

You can then trigger an empty build:

$ make nothing

Note that if you build using mm or other limited makes with these environment variables set the compdb will only include files in included modules.