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Diffstat (limited to 'lib/spack/docs/build_settings.rst')
| -rw-r--r-- | lib/spack/docs/build_settings.rst | 28 |
1 files changed, 26 insertions, 2 deletions
diff --git a/lib/spack/docs/build_settings.rst b/lib/spack/docs/build_settings.rst index c306536c51..6438c0735e 100644 --- a/lib/spack/docs/build_settings.rst +++ b/lib/spack/docs/build_settings.rst @@ -396,10 +396,34 @@ choose between a set of options using ``any_of`` or ``one_of``: ``mpich`` already includes a conflict, so this is redundant but still demonstrates the concept). +You can also set default requirements for all packages under ``all`` +like this: + +.. code-block:: yaml + + packages: + all: + require: '%clang' + +which means every spec will be required to use ``clang`` as a compiler. + +Note that in this case ``all`` represents a *default set of requirements* - +if there are specific package requirements, then the default requirements +under ``all`` are disregarded. For example, with a configuration like this: + +.. code-block:: yaml + + packages: + all: + require: '%clang' + cmake: + require: '%gcc' + +Spack requires ``cmake`` to use ``gcc`` and all other nodes (including cmake dependencies) +to use ``clang``. + Other notes about ``requires``: -* You can only specify requirements for specific packages: you cannot - add ``requires`` under ``all``. * You cannot specify requirements for virtual packages (e.g. you can specify requirements for ``openmpi`` but not ``mpi``). * For ``any_of`` and ``one_of``, the order of specs indicates a |