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https://github.com/borgbackup/borg.git
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d6635da654
- removed hardcoded lib search pathes - to find system libs/headers, one must point these env vars to them: BORG_LIBLZ4_PREFIX, BORG_LIBZSTD_PREFIX, BORG_LIBB2_PREFIX - moved some code from setup.py to setup_*.py
73 lines
2.4 KiB
Python
73 lines
2.4 KiB
Python
# Support code for building a C extension with blake2 files
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#
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# Copyright (c) 2016-present, Gregory Szorc (original code for zstd)
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# 2017-present, Thomas Waldmann (mods to make it more generic, code for blake2)
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# All rights reserved.
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#
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# This software may be modified and distributed under the terms
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# of the BSD license. See the LICENSE file for details.
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import os
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# b2 files, structure as seen in BLAKE2 (reference implementation) project repository:
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b2_sources = [
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'ref/blake2b-ref.c',
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]
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b2_includes = [
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'ref',
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]
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def b2_ext_kwargs(bundled_path, prefer_system, **kwargs):
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"""amend kwargs with b2 stuff for a distutils.extension.Extension initialization.
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bundled_path: relative (to this file) path to the bundled library source code files
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prefer_system: prefer the system-installed library (if found) over the bundled C code
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kwargs: distutils.extension.Extension kwargs that should be amended
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returns: amended kwargs
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"""
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def multi_join(paths, *path_segments):
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"""apply os.path.join on a list of paths"""
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return [os.path.join(*(path_segments + (path, ))) for path in paths]
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define_macros = kwargs.get('define_macros', [])
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system_prefix = os.environ.get('BORG_LIBB2_PREFIX')
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if prefer_system and system_prefix:
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print('Detected and preferring libb2 over bundled BLAKE2')
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define_macros.append(('BORG_USE_LIBB2', 'YES'))
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system = True
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else:
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print('Using bundled BLAKE2')
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system = False
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use_system = system and system_prefix is not None
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sources = kwargs.get('sources', [])
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if not use_system:
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sources += multi_join(b2_sources, bundled_path)
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include_dirs = kwargs.get('include_dirs', [])
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if use_system:
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include_dirs += multi_join(['include'], system_prefix)
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else:
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include_dirs += multi_join(b2_includes, bundled_path)
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library_dirs = kwargs.get('library_dirs', [])
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if use_system:
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library_dirs += multi_join(['lib'], system_prefix)
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libraries = kwargs.get('libraries', [])
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if use_system:
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libraries += ['b2', ]
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extra_compile_args = kwargs.get('extra_compile_args', [])
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if not use_system:
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extra_compile_args += [] # not used yet
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ret = dict(**kwargs)
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ret.update(dict(sources=sources, extra_compile_args=extra_compile_args,
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include_dirs=include_dirs, library_dirs=library_dirs, libraries=libraries))
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return ret
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