Source code for waflib.Tools.ccroot

#!/usr/bin/env python
# encoding: utf-8
# Thomas Nagy, 2005-2018 (ita)

Classes and methods shared by tools providing support for C-like language such
as C/C++/D/Assembly/Go (this support module is almost never used alone).

import os, re
from waflib import Task, Utils, Node, Errors, Logs
from waflib.TaskGen import after_method, before_method, feature, taskgen_method, extension
from waflib.Tools import c_aliases, c_preproc, c_config, c_osx, c_tests
from waflib.Configure import conf

SYSTEM_LIB_PATHS = ['/usr/lib64', '/usr/lib', '/usr/local/lib64', '/usr/local/lib']

USELIB_VARS = Utils.defaultdict(set)
Mapping for features to :py:class:`waflib.ConfigSet.ConfigSet` variables. See :py:func:`waflib.Tools.ccroot.propagate_uselib_vars`.

USELIB_VARS['d']        = set(['INCLUDES', 'DFLAGS'])

USELIB_VARS['cstlib']   = USELIB_VARS['cxxstlib']   = set(['ARFLAGS', 'LINKDEPS'])

USELIB_VARS['dstlib']   = set(['ARFLAGS', 'LINKDEPS'])

USELIB_VARS['asm'] = set(['ASFLAGS'])

# =================================================================================================

[docs]@taskgen_method def create_compiled_task(self, name, node): """ Create the compilation task: c, cxx, asm, etc. The output node is created automatically (object file with a typical **.o** extension). The task is appended to the list *compiled_tasks* which is then used by :py:func:`waflib.Tools.ccroot.apply_link` :param name: name of the task class :type name: string :param node: the file to compile :type node: :py:class:`waflib.Node.Node` :return: The task created :rtype: :py:class:`waflib.Task.Task` """ out = '%s.%d.o' % (, self.idx) task = self.create_task(name, node, node.parent.find_or_declare(out)) try: self.compiled_tasks.append(task) except AttributeError: self.compiled_tasks = [task] return task
[docs]@taskgen_method def to_incnodes(self, inlst): """ Task generator method provided to convert a list of string/nodes into a list of includes folders. The paths are assumed to be relative to the task generator path, except if they begin by **#** in which case they are searched from the top-level directory (``bld.srcnode``). The folders are simply assumed to be existing. The node objects in the list are returned in the output list. The strings are converted into node objects if possible. The node is searched from the source directory, and if a match is found, the equivalent build directory is created and added to the returned list too. When a folder cannot be found, it is ignored. :param inlst: list of folders :type inlst: space-delimited string or a list of string/nodes :rtype: list of :py:class:`waflib.Node.Node` :return: list of include folders as nodes """ lst = [] seen = set() for x in self.to_list(inlst): if x in seen or not x: continue seen.add(x) # with a real lot of targets, it is sometimes interesting to cache the results below if isinstance(x, Node.Node): lst.append(x) else: if os.path.isabs(x): lst.append(self.bld.root.make_node(x) or x) else: if x[0] == '#': p = self.bld.bldnode.make_node(x[1:]) v = self.bld.srcnode.make_node(x[1:]) else: p = self.path.get_bld().make_node(x) v = self.path.make_node(x) if p.is_child_of(self.bld.bldnode): p.mkdir() lst.append(p) lst.append(v) return lst
[docs]@feature('c', 'cxx', 'd', 'asm', 'fc', 'includes') @after_method('propagate_uselib_vars', 'process_source') def apply_incpaths(self): """ Task generator method that processes the attribute *includes*:: tg = bld(features='includes', includes='.') The folders only need to be relative to the current directory, the equivalent build directory is added automatically (for headers created in the build directory). This enables using a build directory or not (``top == out``). This method will add a list of nodes read by :py:func:`waflib.Tools.ccroot.to_incnodes` in ``tg.env.INCPATHS``, and the list of include paths in ``tg.env.INCLUDES``. """ lst = self.to_incnodes(self.to_list(getattr(self, 'includes', [])) + self.env.INCLUDES) self.includes_nodes = lst cwd = self.get_cwd() self.env.INCPATHS = [x.path_from(cwd) for x in lst]
def rm_tgt(cls): old = def wrap(self): try: os.remove(self.outputs[0].abspath()) except OSError: pass return old(self) setattr(cls, 'run', wrap) rm_tgt(stlink_task)
[docs]@taskgen_method def use_rec(self, name, **kw): """ Processes the ``use`` keyword recursively. This method is kind of private and only meant to be used from ``process_use`` """ if name in self.tmp_use_not or name in self.tmp_use_seen: return try: y = self.bld.get_tgen_by_name(name) except Errors.WafError: self.uselib.append(name) self.tmp_use_not.add(name) return self.tmp_use_seen.append(name) # bind temporary attributes on the task generator y.tmp_use_objects = objects = kw.get('objects', True) y.tmp_use_stlib = stlib = kw.get('stlib', True) try: link_task = y.link_task except AttributeError: y.tmp_use_var = '' else: objects = False if not isinstance(link_task, stlink_task): stlib = False y.tmp_use_var = 'LIB' else: y.tmp_use_var = 'STLIB' p = self.tmp_use_prec for x in self.to_list(getattr(y, 'use', [])): if self.env["STLIB_" + x]: continue try: p[x].append(name) except KeyError: p[x] = [name] self.use_rec(x, objects=objects, stlib=stlib)
[docs]@feature('c', 'cxx', 'd', 'use', 'fc') @before_method('apply_incpaths', 'propagate_uselib_vars') @after_method('apply_link', 'process_source') def process_use(self): """ Process the ``use`` attribute which contains a list of task generator names:: def build(bld): bld.shlib(source='a.c', target='lib1') bld.program(source='main.c', target='app', use='lib1') See :py:func:`waflib.Tools.ccroot.use_rec`. """ use_not = self.tmp_use_not = set() self.tmp_use_seen = [] # we would like an ordered set use_prec = self.tmp_use_prec = {} self.uselib = self.to_list(getattr(self, 'uselib', [])) self.includes = self.to_list(getattr(self, 'includes', [])) names = self.to_list(getattr(self, 'use', [])) for x in names: self.use_rec(x) for x in use_not: if x in use_prec: del use_prec[x] # topological sort out = self.tmp_use_sorted = [] tmp = [] for x in self.tmp_use_seen: for k in use_prec.values(): if x in k: break else: tmp.append(x) while tmp: e = tmp.pop() out.append(e) try: nlst = use_prec[e] except KeyError: pass else: del use_prec[e] for x in nlst: for y in use_prec: if x in use_prec[y]: break else: tmp.append(x) if use_prec: raise Errors.WafError('Cycle detected in the use processing %r' % use_prec) out.reverse() link_task = getattr(self, 'link_task', None) for x in out: y = self.bld.get_tgen_by_name(x) var = y.tmp_use_var if var and link_task: if self.env.SKIP_STLIB_LINK_DEPS and isinstance(link_task, stlink_task): # If the skip_stlib_link_deps feature is enabled then we should # avoid adding lib deps to the stlink_task instance. pass elif var == 'LIB' or y.tmp_use_stlib or x in names: self.env.append_value(var, [[ + 1:]]) self.link_task.dep_nodes.extend(y.link_task.outputs) tmp_path = y.link_task.outputs[0].parent.path_from(self.get_cwd()) self.env.append_unique(var + 'PATH', [tmp_path]) else: if y.tmp_use_objects: self.add_objects_from_tgen(y) if getattr(y, 'export_includes', None): # self.includes may come from a global variable #2035 self.includes = self.includes + y.to_incnodes(y.export_includes) if getattr(y, 'export_defines', None): self.env.append_value('DEFINES', self.to_list(y.export_defines)) # and finally, add the use variables (no recursion needed) for x in names: try: y = self.bld.get_tgen_by_name(x) except Errors.WafError: if not self.env['STLIB_' + x] and not x in self.uselib: self.uselib.append(x) else: for k in self.to_list(getattr(y, 'use', [])): if not self.env['STLIB_' + k] and not k in self.uselib: self.uselib.append(k)
[docs]@taskgen_method def add_objects_from_tgen(self, tg): """ Add the objects from the depending compiled tasks as link task inputs. Some objects are filtered: for instance, .pdb files are added to the compiled tasks but not to the link tasks (to avoid errors) PRIVATE INTERNAL USE ONLY """ try: link_task = self.link_task except AttributeError: pass else: for tsk in getattr(tg, 'compiled_tasks', []): for x in tsk.outputs: if self.accept_node_to_link(x): link_task.inputs.append(x)
[docs]@taskgen_method def get_uselib_vars(self): """ :return: the *uselib* variables associated to the *features* attribute (see :py:attr:`waflib.Tools.ccroot.USELIB_VARS`) :rtype: list of string """ _vars = set() for x in self.features: if x in USELIB_VARS: _vars |= USELIB_VARS[x] return _vars
[docs]@feature('c', 'cxx', 'd', 'fc', 'javac', 'cs', 'uselib', 'asm') @after_method('process_use') def propagate_uselib_vars(self): """ Process uselib variables for adding flags. For example, the following target:: def build(bld): bld.env.AFLAGS_aaa = ['bar'] from waflib.Tools.ccroot import USELIB_VARS USELIB_VARS['aaa'] = ['AFLAGS'] tg = bld(features='aaa', aflags='test') The *aflags* attribute will be processed and this method will set:: tg.env.AFLAGS = ['bar', 'test'] """ _vars = self.get_uselib_vars() env = self.env app = env.append_value feature_uselib = self.features + self.to_list(getattr(self, 'uselib', [])) for var in _vars: y = var.lower() val = getattr(self, y, []) if val: app(var, self.to_list(val)) for x in feature_uselib: val = env['%s_%s' % (var, x)] if val: app(var, val)
# ============ the code above must not know anything about import libs ==========
[docs]@feature('cshlib', 'cxxshlib', 'fcshlib') @after_method('apply_link') def apply_implib(self): """ Handle dlls and their import libs on Windows-like systems. A ``.dll.a`` file called *import library* is generated. It must be installed as it is required for linking the library. """ if not self.env.DEST_BINFMT == 'pe': return dll = self.link_task.outputs[0] if isinstance(, Node.Node): name = else: name = os.path.split([1] implib = self.env.implib_PATTERN % name implib = dll.parent.find_or_declare(implib) self.env.append_value('LINKFLAGS', self.env.IMPLIB_ST % implib.bldpath()) self.link_task.outputs.append(implib) if getattr(self, 'defs', None) and self.env.DEST_BINFMT == 'pe': node = self.path.find_resource(self.defs) if not node: raise Errors.WafError('invalid def file %r' % self.defs) if self.env.def_PATTERN: self.env.append_value('LINKFLAGS', self.env.def_PATTERN % node.path_from(self.get_cwd())) self.link_task.dep_nodes.append(node) else: # gcc for windows takes *.def file as input without any special flag self.link_task.inputs.append(node) # where to put the import library if getattr(self, 'install_task', None): try: # user has given a specific installation path for the import library inst_to = self.install_path_implib except AttributeError: try: # user has given an installation path for the main library, put the import library in it inst_to = self.install_path except AttributeError: # else, put the library in BINDIR and the import library in LIBDIR inst_to = '${IMPLIBDIR}' self.install_task.install_to = '${BINDIR}' if not self.env.IMPLIBDIR: self.env.IMPLIBDIR = self.env.LIBDIR self.implib_install_task = self.add_install_files(install_to=inst_to, install_from=implib, chmod=self.link_task.chmod, task=self.link_task)
# ============ the code above must not know anything about vnum processing on unix platforms ========= re_vnum = re.compile('^([1-9]\\d*|0)([.]([1-9]\\d*|0)){0,2}?$')
[docs]@feature('cshlib', 'cxxshlib', 'dshlib', 'fcshlib', 'vnum') @after_method('apply_link', 'propagate_uselib_vars') def apply_vnum(self): """ Enforce version numbering on shared libraries. The valid version numbers must have either zero or two dots:: def build(bld): bld.shlib(source='a.c', target='foo', vnum='14.15.16') In this example on Linux platform, ```` is installed as ````, and the following symbolic links are created: * `` →`` * `` →`` By default, the library will be assigned SONAME ````, effectively declaring ABI compatibility between all minor and patch releases for the major version of the library. When necessary, the compatibility can be explicitly defined using `cnum` parameter: def build(bld): bld.shlib(source='a.c', target='foo', vnum='14.15.16', cnum='14.15') In this case, the assigned SONAME will be ```` with ABI compatibility only between path releases for a specific major and minor version of the library. On OS X platform, install-name parameter will follow the above logic for SONAME with exception that it also specifies an absolute path (based on install_path) of the library. """ if not getattr(self, 'vnum', '') or != 'posix' or self.env.DEST_BINFMT not in ('elf', 'mac-o'): return link = self.link_task if not re_vnum.match(self.vnum): raise Errors.WafError('Invalid vnum %r for target %r' % (self.vnum, getattr(self, 'name', self))) nums = self.vnum.split('.') node = link.outputs[0] cnum = getattr(self, 'cnum', str(nums[0])) cnums = cnum.split('.') if len(cnums)>len(nums) or nums[0:len(cnums)] != cnums: raise Errors.WafError('invalid compatibility version %s' % cnum) libname = if libname.endswith('.dylib'): name3 = libname.replace('.dylib', '.%s.dylib' % self.vnum) name2 = libname.replace('.dylib', '.%s.dylib' % cnum) else: name3 = libname + '.' + self.vnum name2 = libname + '.' + cnum # add the so name for the ld linker - to disable, just unset env.SONAME_ST if self.env.SONAME_ST: v = self.env.SONAME_ST % name2 self.env.append_value('LINKFLAGS', v.split()) # the following task is just to enable execution from the build dir :-/ if self.env.DEST_OS != 'openbsd': outs = [node.parent.make_node(name3)] if name2 != name3: outs.append(node.parent.make_node(name2)) self.create_task('vnum', node, outs) if getattr(self, 'install_task', None): self.install_task.hasrun = Task.SKIPPED self.install_task.no_errcheck_out = True path = self.install_task.install_to if self.env.DEST_OS == 'openbsd': libname = self.link_task.outputs[0].name t1 = self.add_install_as(install_to='%s/%s' % (path, libname), install_from=node, chmod=self.link_task.chmod) self.vnum_install_task = (t1,) else: t1 = self.add_install_as(install_to=path + os.sep + name3, install_from=node, chmod=self.link_task.chmod) t3 = self.add_symlink_as(install_to=path + os.sep + libname, install_from=name3) if name2 != name3: t2 = self.add_symlink_as(install_to=path + os.sep + name2, install_from=name3) self.vnum_install_task = (t1, t2, t3) else: self.vnum_install_task = (t1, t3) if '-dynamiclib' in self.env.LINKFLAGS: # this requires after(propagate_uselib_vars) try: inst_to = self.install_path except AttributeError: inst_to = self.link_task.inst_to if inst_to: p = Utils.subst_vars(inst_to, self.env) path = os.path.join(p, name2) self.env.append_value('LINKFLAGS', ['-install_name', path]) self.env.append_value('LINKFLAGS', '-Wl,-compatibility_version,%s' % cnum) self.env.append_value('LINKFLAGS', '-Wl,-current_version,%s' % self.vnum)
[docs]class vnum(Task.Task): """ Create the symbolic links for a versioned shared library. Instances are created by :py:func:`waflib.Tools.ccroot.apply_vnum` """ color = 'CYAN' ext_in = ['.bin']
[docs] def keyword(self): return 'Symlinking'
def run(self): for x in self.outputs: path = x.abspath() try: os.remove(path) except OSError: pass try: os.symlink(self.inputs[0].name, path) except OSError: return 1
[docs]class fake_shlib(link_task): """ Task used for reading a system library and adding the dependency on it """
[docs] def runnable_status(self): for t in self.run_after: if not t.hasrun: return Task.ASK_LATER return Task.SKIP_ME
[docs]class fake_stlib(stlink_task): """ Task used for reading a system library and adding the dependency on it """
[docs] def runnable_status(self): for t in self.run_after: if not t.hasrun: return Task.ASK_LATER return Task.SKIP_ME
[docs]@conf def read_shlib(self, name, paths=[], export_includes=[], export_defines=[]): """ Read a system shared library, enabling its use as a local library. Will trigger a rebuild if the file changes:: def build(bld): bld.read_shlib('m') bld.program(source='main.c', use='m') """ return self(name=name, features='fake_lib', lib_paths=paths, lib_type='shlib', export_includes=export_includes, export_defines=export_defines)
[docs]@conf def read_stlib(self, name, paths=[], export_includes=[], export_defines=[]): """ Read a system static library, enabling a use as a local library. Will trigger a rebuild if the file changes. """ return self(name=name, features='fake_lib', lib_paths=paths, lib_type='stlib', export_includes=export_includes, export_defines=export_defines)
lib_patterns = { 'shlib' : ['', '', 'lib%s.dylib', 'lib%s.dll', '%s.dll'], 'stlib' : ['lib%s.a', '%s.a', 'lib%s.dll', '%s.dll', 'lib%s.lib', '%s.lib'], }
[docs]@feature('fake_lib') def process_lib(self): """ Find the location of a foreign library. Used by :py:class:`waflib.Tools.ccroot.read_shlib` and :py:class:`waflib.Tools.ccroot.read_stlib`. """ node = None names = [x % for x in lib_patterns[self.lib_type]] for x in self.lib_paths + [self.path] + SYSTEM_LIB_PATHS: if not isinstance(x, Node.Node): x = self.bld.root.find_node(x) or self.path.find_node(x) if not x: continue for y in names: node = x.find_node(y) if node: try: Utils.h_file(node.abspath()) except EnvironmentError: raise ValueError('Could not read %r' % y) break else: continue break else: raise Errors.WafError('could not find library %r' % self.link_task = self.create_task('fake_%s' % self.lib_type, [], [node]) =
[docs]class fake_o(Task.Task):
[docs] def runnable_status(self): return Task.SKIP_ME
@extension('.o', '.obj') def add_those_o_files(self, node): tsk = self.create_task('fake_o', [], node) try: self.compiled_tasks.append(tsk) except AttributeError: self.compiled_tasks = [tsk]
[docs]@feature('fake_obj') @before_method('process_source') def process_objs(self): """ Puts object files in the task generator outputs """ for node in self.to_nodes(self.source): self.add_those_o_files(node) self.source = []
[docs]@conf def read_object(self, obj): """ Read an object file, enabling injection in libs/programs. Will trigger a rebuild if the file changes. :param obj: object file path, as string or Node """ if not isinstance(obj, self.path.__class__): obj = self.path.find_resource(obj) return self(features='fake_obj', source=obj,
[docs]@feature('cxxprogram', 'cprogram') @after_method('apply_link', 'process_use') def set_full_paths_hpux(self): """ On hp-ux, extend the libpaths and static library paths to absolute paths """ if self.env.DEST_OS != 'hp-ux': return base = self.bld.bldnode.abspath() for var in ['LIBPATH', 'STLIBPATH']: lst = [] for x in self.env[var]: if x.startswith('/'): lst.append(x) else: lst.append(os.path.normpath(os.path.join(base, x))) self.env[var] = lst