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