[CMake] more targets to run in parallel

[Andrea Crotti]

On 02/20/2012 11:51 AM, Eric Noulard wrote:
> 2012/2/20 Andrea Crotti<andrea.crotti.0 at gmail.com>:
>> On 02/17/2012 03:35 PM, Andrea Crotti wrote:
>> ..
>>
>> I can make the question much simpler, is it possible to generate targets
>> dynamically with CMake?
> As far as I know you can "generate" targets at CMake-time but not at build-time.
> So from my point of view this "computed target" but not really "dynamic target".
> if you want your target to trigger the command you may
> add the OUTPUT of the command as a dependency of the target.
>
> add_custom_target(${t}
>      DEPENDS ${t_cmd}
>                              )
>
>

Ah thanks now I got it, I thought that the name of the custom_command 
was given
from the OUTPUT, for some strange reason.

Doing this however:
foreach (t ${target_list})
   set(t_cmd ${t}.out)
   add_custom_command(OUTPUT ${t_cmd}
     COMMAND "ls ${t}"
     )
endforeach ()

foreach (t ${target_list})
   message("analyzing target ${t}")
   set(t_cmd ${t}.out)
   add_custom_target(${t}
     DEPENDS ${t_cmd}
     )
endforeach ()

is still problematic:
~/psi_diet/test_cmake $ make uno
[100%] Generating uno.out
/bin/sh: ls uno: command not found
make[3]: *** [uno.out] Error 127



So I tried an even simpler example:
add_custom_command(OUTPUT simple
   COMMAND "ls -l"
   )

add_custom_target(simple
   DEPENDS simple
   )


and everything works apparently, but it doesn't generate the "simple" file..
How do I generate an output file which is used as dependency of the "simple"
target then?