CMake/Help/envvar/CMAKE_EXPORT_COMPILE_COMMANDS.rst

CMAKE_EXPORT_COMPILE_COMMANDS
-----------------------------

.. include:: ENV_VAR.txt

The default value for :variable:`CMAKE_EXPORT_COMPILE_COMMANDS` when there
is no explicit configuration given on the first run while creating a new
build tree.  On later runs in an existing build tree the value persists in
the cache as :variable:`CMAKE_EXPORT_COMPILE_COMMANDS`.