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Diffstat (limited to 'lib')
| -rw-r--r-- | lib/spack/docs/packaging_guide.rst | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/lib/spack/docs/packaging_guide.rst b/lib/spack/docs/packaging_guide.rst index 34d11308f5..31c676d4f5 100644 --- a/lib/spack/docs/packaging_guide.rst +++ b/lib/spack/docs/packaging_guide.rst @@ -1831,6 +1831,25 @@ successfully find ``libdwarf.h`` and ``libdwarf.so``, without the packager having to provide ``--with-libdwarf=/path/to/libdwarf`` on the command line. +Compiler flags +~~~~~~~~~~~~~~ +In rare circumstances such as compiling and running small unit tests, a package +developer may need to know what are the appropriate compiler flags to enable +features like ``OpenMP``, ``c++11``, ``c++14`` and alike. To that end the +compiler classes in ``spack`` implement the following _properties_ : +``openmp_flag``, ``cxx11_flag``, ``cxx14_flag``, which can be accessed in a +package by ``self.compiler.cxx11_flag`` and alike. Note that the implementation +is such that if a given compiler version does not support this feature, an +error will be produced. Therefore package developers can also use these properties +to assert that a compiler supports the requested feature. This is handy when a +package supports additional variants like + +.. code-block:: python + + variant('openmp', default=True, description="Enable OpenMP support.") + + + Message Parsing Interface (MPI) ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ It is common for high performance computing software/packages to use ``MPI``. |