append to/from command line variable

[Martin d'Anjou]

Hi,

I read that it is not possible to append to a variable from the command
line: http://lists.gnu.org/archive/html/help-make/2003-02/msg00001.html

How hard is it to modify the source code to acheive this anyway? My C is
rusty, but the benefit would be terrific, at least in my application. I
have *hundreds* of variables and doing the _local_ trick is a maintenance
problem.

Thanks,
Martin