[CMake] ARGVn madness?!

[Marcel Loose]

Hi all,

I've been bitten by an IMHO weird behaviour with argument substitution.
When I call a macro from within a function, then unused ARGVn variables
(where n=1..9) retain the value that they got when entering the
function. Is this a bug?!

This example demonstrates what I mean:

$ cat ../CMakeLists.txt
project(Dummy)
cmake_minimum_required(VERSION 2.6)

function(my_function)
  message(STATUS "my_function: ARGC=${ARGC}")
  message(STATUS "my_function: ARGV=${ARGV}")
  message(STATUS "my_function: ARGV0=${ARGV0}")
  message(STATUS "my_function: ARGV1=${ARGV1}")
  my_macro(mies)
endfunction(my_function)

macro(my_macro)
  message(STATUS "my_macro: ARGC=${ARGC}")
  message(STATUS "my_macro: ARGV=${ARGV}")
  message(STATUS "my_macro: ARGV0=${ARGV0}")
  message(STATUS "my_macro: ARGV1=${ARGV1}")
endmacro(my_macro)

my_function(aap noot)
my_macro(wim)

$ cmake ..
-- my_function: ARGC=2
-- my_function: ARGV=aap;noot
-- my_function: ARGV0=aap
-- my_function: ARGV1=noot
-- my_macro: ARGC=1
-- my_macro: ARGV=mies
-- my_macro: ARGV0=mies
-- my_macro: ARGV1=noot    <---
-- my_macro: ARGC=1
-- my_macro: ARGV=wim
-- my_macro: ARGV0=wim
-- my_macro: ARGV1=
-- Configuring done
-- Generating done
-- Build files have been written to: /tmp/loose/cmake/build

I expected to find "ARGV1=" in the line marked with "<---", not
"ARGV1=noot". 

Best regards,
Marcel Loose.