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add documentation for make_jobs variable (#44838)

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* add documentation for make_jobs variable

* apply suggested changes

* Update packaging_guide.rst

add suggestions to the documentation

* Update packaging_guide.rst

fix missing quotes in the documentation

* suggestions to packaging_guide.rst
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Miguel 2024-06-25 19:24:49 +02:00 committed by GitHub
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lib/spack/docs/packaging_guide.rst
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@ -2344,6 +2344,27 @@ you set ``parallel`` to ``False`` at the package level, then each call
to ``make()`` will be sequential by default, but packagers can call to ``make()`` will be sequential by default, but packagers can call
``make(parallel=True)`` to override it. ``make(parallel=True)`` to override it.
Note that the `--jobs` option works out of the box for all standard
build systems. If you are using a non-standard build system instead, you
can use the variable `make_jobs` to extract the number of jobs specified
by the `--jobs` option:
.. code-block:: python
:emphasize-lines: 7, 11
:linenos:
class Xios(Package):
...
def install(self, spec, prefix):
...
options = [
...
'--jobs', str(make_jobs),
]
...
make_xios = Executable("./make_xios")
make_xios(*options)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Install-level build parallelism Install-level build parallelism
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^