CMake: Running shell script after expanding variables in it

Question

Following is the issue, I am encountering

I have a shell script named my_script.sh.IN. I use configure_file for expanding script and thus creating my_script.sh.
I then need to run my_script.sh. For this purpose, I am using execute_process().
I need all of this at CMake time.

Issue: Problem is that when I run "cmake", system complains that he could not find "my_script.sh". I think that execute_process dependencies seem to be calculated before configure_file() function runs.

When I run "cmake" command second time, everything goes fine. Does anybody knows that how can I able to execute configure_file before execute_process?

Why does it needs to be done at cmake time? It would be much more easier to do it at compile time with add_custom_target / add_custom_command and a dependency on the my_script.sh file. — Guillaume
– Guillaume, Commented Nov 15, 2013 at 16:14

Antwane · Accepted Answer · 2014-01-09 09:00:48Z

1

You should try something like that:

set_source_files_properties("pat/to/my_script.sh" PROPERTIES GENERATED true)

It tells cmake to not check the existency of the file too early. You will probably have to use the variable containing the path of your generated shell script instead of typing directly its path.

But your issue is more probably related to order of the executed cmake commands. You should ensure configure_file() is run BEFORE execute_process() by CMake parser.

answered Jan 9, 2014 at 9:00

Antwane

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