[CMake] big custom command dependency problem

[Juan Sanchez]

I found the problem.  The output from the custom command has to
explicitly specify the destination path of the output file.

OUTPUT ${PROJECT_BINARY_DIR}/output.cc

I was already specifying the full path for the input to the library.

Regards,

Juan


Juan Sanchez wrote:
> I created a custom command to generate a cpp file.
> 
> I then use this cpp file to create a library as a separate add_library
> command.
> 
> Whenever I type make, this cpp file is regenerated, and the library is
> recreated.  Compiling this file is super expensive.  Nothing has changed
> between invocations of make.
> 
> I stated the dependencies in the custom command.  Why is it always
> recreating the cpp file?
> 
> Is there anyway to stop this behavior?
> 
> Turning off dependency checking is not an option since it is needed for
> everything else.  This is gmake on a linux box.
> 
> Thanks,
> 
> Juan
> 
> 
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-- 
Juan Sanchez
Juan.Sanchez at amd.com
800-538-8450 Ext. 54395
512-602-4395