[CMake] passing arguments to the final make

[Michael Hertling]

On 02/23/2012 12:04 AM, John Drescher wrote:
>> And another thing, is it actually \${SCRIPT} a portable solution that works
>> on all the generators?
>>
> 
> This is not about generators but about what shell you are running
> cmake from. For example that would not work on windows since the
> command prompt has a different syntax for variables.

The point is that ${SCRIPT} is substituted in the Makefile by

(1) a macro specified on the command line
(2) a macro specified in the Makefile
(3) an environment variable

in that order, or with (2) and (3) reversed if Make is invoked with the
"-e" switch. When the Makefile's command lines are passed to the shell,
the substitution has already taken place, so it should also work with
the Windows command prompt. However, one needs a Make program, i.e. a
parameterization of this kind probably doesn't work with non-Makefile
generators. Even with Makefiles, there are subtle pitfalls: If a line
"SCRIPT = ..." happens to appear somewhere in the Makefiles, invoking
Make as "make SCRIPT=..." will overwrite it, most certainly resulting
in surprising and undesired behaviour. Personally, I'd advise against
using this method without explicit support by the Makefile generator.

Regards,

Michael