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docs: jobserver & generated makefiles (#30526)

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Harmen Stoppels 2022-05-06 14:04:48 +02:00 committed by GitHub
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12
lib/spack/docs/environments.rst
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@ -950,12 +950,14 @@ A typical workflow is as follows:
spack -e . add perl
spack -e . concretize
spack -e . env depfile > Makefile
make -j8
make -j64
This creates an environment in the current working directory, and after
concretization, generates a ``Makefile``. Then ``make`` starts at most
8 concurrent jobs, meaning that multiple ``spack install`` processes may
start.
This generates a ``Makefile`` from a concretized environment in the
current working directory, and ``make -j64`` installs the environment,
exploiting parallelism across packages as much as possible. Spack
respects the Make jobserver and forwards it to the build environment
of packages, meaning that a single ``-j`` flag is enough to control the
load, even when packages are built in parallel.
By default the following phony convenience targets are available: