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47cafbeeb9
Currently we build the Python extension module from all the libfdt source files as well as the swig wrapper file. This is a bit silly, since we've already compiled libfdt itself. This changes the build to instead build the extension module from just the swig wrapper, linking it against the libfdt.a we've already build. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Reviewed-by: Simon Glass <sjg@chromium.org>
107 lines
3.1 KiB
Python
Executable file
107 lines
3.1 KiB
Python
Executable file
#!/usr/bin/env python2
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"""
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setup.py file for SWIG libfdt
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Copyright (C) 2017 Google, Inc.
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Written by Simon Glass <sjg@chromium.org>
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C flags to use are provided in CPPFLAGS
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Version is provided in VERSION
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If these variables are not given they are parsed from the Makefiles. This
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allows this script to be run stand-alone, e.g.:
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./pylibfdt/setup.py install [--prefix=...]
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"""
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from distutils.core import setup, Extension
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import os
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import re
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import sys
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# Decodes a Makefile assignment line into key and value (and plus for +=)
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RE_KEY_VALUE = re.compile('(?P<key>\w+) *(?P<plus>[+])?= *(?P<value>.*)$')
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def ParseMakefile(fname):
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"""Parse a Makefile to obtain its variables.
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This collects variable assigments of the form:
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VAR = value
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VAR += more
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It does not pick out := assignments, as these are not needed here. It does
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handle line continuation.
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Returns a dict:
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key: Variable name (e.g. 'VAR')
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value: Variable value (e.g. 'value more')
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"""
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makevars = {}
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with open(fname) as fd:
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prev_text = '' # Continuation text from previous line(s)
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for line in fd.read().splitlines():
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if line and line[-1] == '\\': # Deal with line continuation
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prev_text += line[:-1]
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continue
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elif prev_text:
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line = prev_text + line
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prev_text = '' # Continuation is now used up
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m = RE_KEY_VALUE.match(line)
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if m:
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value = m.group('value') or ''
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key = m.group('key')
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# Appending to a variable inserts a space beforehand
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if 'plus' in m.groupdict() and key in makevars:
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makevars[key] += ' ' + value
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else:
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makevars[key] = value
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return makevars
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def GetEnvFromMakefiles():
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"""Scan the Makefiles to obtain the settings we need.
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This assumes that this script is being run from the top-level directory,
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not the pylibfdt directory.
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Returns:
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Tuple with:
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Version string
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List of extra C preprocessor flags needed
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"""
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basedir = os.path.dirname(os.path.dirname(os.path.abspath(sys.argv[0])))
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makevars = ParseMakefile(os.path.join(basedir, 'Makefile'))
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version = '%s.%s.%s' % (makevars['VERSION'], makevars['PATCHLEVEL'],
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makevars['SUBLEVEL'])
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cflags = ['-I%s/libfdt' % basedir]
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return version, cflags
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progname = sys.argv[0]
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cflags = os.environ.get('CPPFLAGS', '').split()
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version = os.environ.get('VERSION')
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# If we were called directly rather than through our Makefile (which is often
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# the case with Python module installation), read the settings from the
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# Makefile.
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if not all((version, cflags)):
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version, cflags= GetEnvFromMakefiles()
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libfdt_module = Extension(
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'_libfdt',
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sources = ['pylibfdt/libfdt.i'],
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libraries = ['fdt'],
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library_dirs = ['libfdt'],
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extra_compile_args = cflags,
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)
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setup(
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name='libfdt',
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version= version,
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author='Simon Glass <sjg@chromium.org>',
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description='Python binding for libfdt',
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ext_modules=[libfdt_module],
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py_modules=['pylibfdt/libfdt'],
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)
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