forked from lijiext/lammps
55 lines
2.4 KiB
Plaintext
55 lines
2.4 KiB
Plaintext
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The Makefile.lammps file in this directory is used when building
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LAMMPS with its PYTHON package installed. The file has several
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settings needed to compile and link LAMMPS with the Python library.
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You should choose a Makefile.lammps.* file compatible with your system
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and your version of Python, and copy it to Makefile.lammps before
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building LAMMPS itself. You may need to edit one of the provided
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files to match your system.
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If you create a new Makefile.lammps file suitable for some version of
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Python on some system, that is not a match to one of the provided
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Makefile.lammps.* files, you can send it to the developers, and we can
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include it in the distribution for others to use.
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To illustrate, these are example settings from the
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Makefile.lammps.python2.7 file:
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python_SYSINC = -I/usr/local/include/python2.7
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python_SYSLIB = -lpython2.7 -lnsl -ldl -lreadline -ltermcap -lpthread -lutil -lm
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python_SYSPATH =
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python_SYSINC refers to the directory where Python's Python.h file is
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found. LAMMPS includes this file.
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python_SYSLIB refers to the libraries needed to link to from an
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application (LAMMPS in this case) to "embed" Python in the
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application. The Python library itself is listed (-lpython2.7) are
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are several system libraries needed by Python.
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python_SYSPATH = refers to the path (e.g. -L/usr/local/lib) where the
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Python library can be found. You may not need this setting if the
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path is already included in your LD_LIBRARY_PATH environment variable.
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-------------------------
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Note that the trickiest issue to figure out for inclusion in
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Makefile.lammps is what system libraries are needed by your Python to
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run in embedded mode on your machine.
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Here is what this Python doc page says about it:
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https://docs.python.org/2/extending/embedding.html#compiling-and-linking-under-unix-like-systems
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"It is not necessarily trivial to find the right flags to pass to your
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compiler (and linker) in order to embed the Python interpreter into
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your application, particularly because Python needs to load library
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modules implemented as C dynamic extensions (.so files) linked against
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it.
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To find out the required compiler and linker flags, you can execute
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the pythonX.Y-config script which is generated as part of the
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installation process (a python-config script may also be available)."
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It then gives examples of how to use the pythonX.Y-config script
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and further instructions for what to do if that doesn't work.
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