mirror of https://github.com/python/cpython
199 lines
7.6 KiB
Python
199 lines
7.6 KiB
Python
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"""Build C/C++ libraries.
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This command is useful to build libraries that are included in the
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distribution and needed by extension modules.
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"""
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# XXX this module has *lots* of code ripped-off quite transparently from
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# build_ext.py -- not surprisingly really, as the work required to build
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# a static library from a collection of C source files is not really all
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# that different from what's required to build a shared object file from
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# a collection of C source files. Nevertheless, I haven't done the
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# necessary refactoring to account for the overlap in code between the
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# two modules, mainly because a number of subtle details changed in the
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# cut 'n paste. Sigh.
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import os
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from packaging.command.cmd import Command
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from packaging.errors import PackagingSetupError
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from packaging.compiler import customize_compiler
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from packaging import logger
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def show_compilers():
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from packaging.compiler import show_compilers
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show_compilers()
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class build_clib(Command):
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description = "build C/C++ libraries used by extension modules"
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user_options = [
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('build-clib=', 'b',
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"directory to build C/C++ libraries to"),
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('build-temp=', 't',
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"directory to put temporary build by-products"),
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('debug', 'g',
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"compile with debugging information"),
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('force', 'f',
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"forcibly build everything (ignore file timestamps)"),
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('compiler=', 'c',
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"specify the compiler type"),
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]
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boolean_options = ['debug', 'force']
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help_options = [
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('help-compiler', None,
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"list available compilers", show_compilers),
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]
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def initialize_options(self):
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self.build_clib = None
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self.build_temp = None
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# List of libraries to build
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self.libraries = None
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# Compilation options for all libraries
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self.include_dirs = None
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self.define = None
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self.undef = None
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self.debug = None
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self.force = False
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self.compiler = None
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def finalize_options(self):
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# This might be confusing: both build-clib and build-temp default
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# to build-temp as defined by the "build" command. This is because
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# I think that C libraries are really just temporary build
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# by-products, at least from the point of view of building Python
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# extensions -- but I want to keep my options open.
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self.set_undefined_options('build',
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('build_temp', 'build_clib'),
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('build_temp', 'build_temp'),
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'compiler', 'debug', 'force')
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self.libraries = self.distribution.libraries
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if self.libraries:
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self.check_library_list(self.libraries)
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if self.include_dirs is None:
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self.include_dirs = self.distribution.include_dirs or []
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if isinstance(self.include_dirs, str):
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self.include_dirs = self.include_dirs.split(os.pathsep)
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# XXX same as for build_ext -- what about 'self.define' and
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# 'self.undef' ?
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def run(self):
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if not self.libraries:
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return
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# Yech -- this is cut 'n pasted from build_ext.py!
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from packaging.compiler import new_compiler
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self.compiler = new_compiler(compiler=self.compiler,
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dry_run=self.dry_run,
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force=self.force)
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customize_compiler(self.compiler)
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if self.include_dirs is not None:
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self.compiler.set_include_dirs(self.include_dirs)
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if self.define is not None:
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# 'define' option is a list of (name,value) tuples
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for name, value in self.define:
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self.compiler.define_macro(name, value)
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if self.undef is not None:
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for macro in self.undef:
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self.compiler.undefine_macro(macro)
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self.build_libraries(self.libraries)
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def check_library_list(self, libraries):
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"""Ensure that the list of libraries is valid.
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`library` is presumably provided as a command option 'libraries'.
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This method checks that it is a list of 2-tuples, where the tuples
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are (library_name, build_info_dict).
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Raise PackagingSetupError if the structure is invalid anywhere;
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just returns otherwise.
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"""
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if not isinstance(libraries, list):
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raise PackagingSetupError("'libraries' option must be a list of tuples")
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for lib in libraries:
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if not isinstance(lib, tuple) and len(lib) != 2:
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raise PackagingSetupError("each element of 'libraries' must a 2-tuple")
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name, build_info = lib
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if not isinstance(name, str):
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raise PackagingSetupError("first element of each tuple in 'libraries' " + \
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"must be a string (the library name)")
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if '/' in name or (os.sep != '/' and os.sep in name):
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raise PackagingSetupError(("bad library name '%s': " +
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"may not contain directory separators") % \
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lib[0])
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if not isinstance(build_info, dict):
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raise PackagingSetupError("second element of each tuple in 'libraries' " + \
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"must be a dictionary (build info)")
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def get_library_names(self):
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# Assume the library list is valid -- 'check_library_list()' is
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# called from 'finalize_options()', so it should be!
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if not self.libraries:
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return None
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lib_names = []
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for lib_name, build_info in self.libraries:
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lib_names.append(lib_name)
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return lib_names
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def get_source_files(self):
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self.check_library_list(self.libraries)
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filenames = []
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for lib_name, build_info in self.libraries:
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sources = build_info.get('sources')
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if sources is None or not isinstance(sources, (list, tuple)):
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raise PackagingSetupError(("in 'libraries' option (library '%s'), "
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"'sources' must be present and must be "
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"a list of source filenames") % lib_name)
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filenames.extend(sources)
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return filenames
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def build_libraries(self, libraries):
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for lib_name, build_info in libraries:
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sources = build_info.get('sources')
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if sources is None or not isinstance(sources, (list, tuple)):
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raise PackagingSetupError(("in 'libraries' option (library '%s'), " +
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"'sources' must be present and must be " +
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"a list of source filenames") % lib_name)
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sources = list(sources)
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logger.info("building '%s' library", lib_name)
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# First, compile the source code to object files in the library
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# directory. (This should probably change to putting object
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# files in a temporary build directory.)
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macros = build_info.get('macros')
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include_dirs = build_info.get('include_dirs')
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objects = self.compiler.compile(sources,
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output_dir=self.build_temp,
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macros=macros,
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include_dirs=include_dirs,
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debug=self.debug)
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# Now "link" the object files together into a static library.
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# (On Unix at least, this isn't really linking -- it just
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# builds an archive. Whatever.)
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self.compiler.create_static_lib(objects, lib_name,
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output_dir=self.build_clib,
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debug=self.debug)
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