CMake/Help/variable/CMAKE_ARGV0.rst

CMAKE_ARGV0
-----------

Command line argument passed to CMake in script mode.

When run in -P script mode, CMake sets this variable to the first
command line argument.  It then also sets CMAKE_ARGV1, CMAKE_ARGV2,
...  and so on, up to the number of command line arguments given.  See
also CMAKE_ARGC.