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239 lines
6.9 KiB
Python
239 lines
6.9 KiB
Python
#!/usr/bin/env python
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# encoding: utf-8
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# Thomas Nagy, 2008-2010 (ita)
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"""
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Execute the tasks with gcc -MD, read the dependencies from the .d file
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and prepare the dependency calculation for the next run.
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This affects the cxx class, so make sure to load Qt5 after this tool.
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Usage::
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def options(opt):
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opt.load('compiler_cxx')
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def configure(conf):
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conf.load('compiler_cxx gccdeps')
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"""
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import os, re, threading
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from waflib import Task, Logs, Utils, Errors
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from waflib.Tools import c_preproc
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from waflib.TaskGen import before_method, feature
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lock = threading.Lock()
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gccdeps_flags = ['-MD']
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if not c_preproc.go_absolute:
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gccdeps_flags = ['-MMD']
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# Third-party tools are allowed to add extra names in here with append()
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supported_compilers = ['gas', 'gcc', 'icc', 'clang']
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def scan(self):
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if not self.__class__.__name__ in self.env.ENABLE_GCCDEPS:
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return super(self.derived_gccdeps, self).scan()
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nodes = self.generator.bld.node_deps.get(self.uid(), [])
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names = []
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return (nodes, names)
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re_o = re.compile(r"\.o$")
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re_splitter = re.compile(r'(?<!\\)\s+') # split by space, except when spaces are escaped
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def remove_makefile_rule_lhs(line):
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# Splitting on a plain colon would accidentally match inside a
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# Windows absolute-path filename, so we must search for a colon
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# followed by whitespace to find the divider between LHS and RHS
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# of the Makefile rule.
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rulesep = ': '
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sep_idx = line.find(rulesep)
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if sep_idx >= 0:
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return line[sep_idx + 2:]
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else:
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return line
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def path_to_node(base_node, path, cached_nodes):
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# Take the base node and the path and return a node
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# Results are cached because searching the node tree is expensive
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# The following code is executed by threads, it is not safe, so a lock is needed...
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if getattr(path, '__hash__'):
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node_lookup_key = (base_node, path)
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else:
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# Not hashable, assume it is a list and join into a string
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node_lookup_key = (base_node, os.path.sep.join(path))
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try:
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lock.acquire()
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node = cached_nodes[node_lookup_key]
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except KeyError:
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node = base_node.find_resource(path)
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cached_nodes[node_lookup_key] = node
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finally:
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lock.release()
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return node
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def post_run(self):
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if not self.__class__.__name__ in self.env.ENABLE_GCCDEPS:
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return super(self.derived_gccdeps, self).post_run()
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name = self.outputs[0].abspath()
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name = re_o.sub('.d', name)
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try:
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txt = Utils.readf(name)
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except EnvironmentError:
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Logs.error('Could not find a .d dependency file, are cflags/cxxflags overwritten?')
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raise
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#os.remove(name)
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# Compilers have the choice to either output the file's dependencies
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# as one large Makefile rule:
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#
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# /path/to/file.o: /path/to/dep1.h \
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# /path/to/dep2.h \
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# /path/to/dep3.h \
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# ...
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#
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# or as many individual rules:
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#
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# /path/to/file.o: /path/to/dep1.h
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# /path/to/file.o: /path/to/dep2.h
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# /path/to/file.o: /path/to/dep3.h
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# ...
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#
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# So the first step is to sanitize the input by stripping out the left-
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# hand side of all these lines. After that, whatever remains are the
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# implicit dependencies of task.outputs[0]
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txt = '\n'.join([remove_makefile_rule_lhs(line) for line in txt.splitlines()])
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# Now join all the lines together
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txt = txt.replace('\\\n', '')
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val = txt.strip()
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val = [x.replace('\\ ', ' ') for x in re_splitter.split(val) if x]
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nodes = []
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bld = self.generator.bld
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# Dynamically bind to the cache
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try:
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cached_nodes = bld.cached_nodes
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except AttributeError:
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cached_nodes = bld.cached_nodes = {}
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for x in val:
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node = None
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if os.path.isabs(x):
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node = path_to_node(bld.root, x, cached_nodes)
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else:
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# TODO waf 1.9 - single cwd value
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path = getattr(bld, 'cwdx', bld.bldnode)
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# when calling find_resource, make sure the path does not contain '..'
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x = [k for k in Utils.split_path(x) if k and k != '.']
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while '..' in x:
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idx = x.index('..')
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if idx == 0:
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x = x[1:]
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path = path.parent
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else:
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del x[idx]
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del x[idx-1]
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node = path_to_node(path, x, cached_nodes)
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if not node:
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raise ValueError('could not find %r for %r' % (x, self))
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if id(node) == id(self.inputs[0]):
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# ignore the source file, it is already in the dependencies
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# this way, successful config tests may be retrieved from the cache
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continue
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nodes.append(node)
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Logs.debug('deps: gccdeps for %s returned %s', self, nodes)
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bld.node_deps[self.uid()] = nodes
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bld.raw_deps[self.uid()] = []
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try:
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del self.cache_sig
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except AttributeError:
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pass
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Task.Task.post_run(self)
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def sig_implicit_deps(self):
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if not self.__class__.__name__ in self.env.ENABLE_GCCDEPS:
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return super(self.derived_gccdeps, self).sig_implicit_deps()
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bld = self.generator.bld
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try:
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return self.compute_sig_implicit_deps()
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except Errors.TaskNotReady:
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raise ValueError("Please specify the build order precisely with gccdeps (asm/c/c++ tasks)")
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except EnvironmentError:
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# If a file is renamed, assume the dependencies are stale and must be recalculated
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for x in bld.node_deps.get(self.uid(), []):
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if not x.is_bld() and not x.exists():
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try:
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del x.parent.children[x.name]
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except KeyError:
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pass
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key = self.uid()
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bld.node_deps[key] = []
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bld.raw_deps[key] = []
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return Utils.SIG_NIL
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def wrap_compiled_task(classname):
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derived_class = type(classname, (Task.classes[classname],), {})
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derived_class.derived_gccdeps = derived_class
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derived_class.post_run = post_run
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derived_class.scan = scan
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derived_class.sig_implicit_deps = sig_implicit_deps
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for k in ('asm', 'c', 'cxx'):
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if k in Task.classes:
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wrap_compiled_task(k)
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@before_method('process_source')
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@feature('force_gccdeps')
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def force_gccdeps(self):
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self.env.ENABLE_GCCDEPS = ['asm', 'c', 'cxx']
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def configure(conf):
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# in case someone provides a --enable-gccdeps command-line option
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if not getattr(conf.options, 'enable_gccdeps', True):
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return
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global gccdeps_flags
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flags = conf.env.GCCDEPS_FLAGS or gccdeps_flags
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if conf.env.ASM_NAME in supported_compilers:
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try:
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conf.check(fragment='', features='asm force_gccdeps', asflags=flags, compile_filename='test.S', msg='Checking for asm flags %r' % ''.join(flags))
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except Errors.ConfigurationError:
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pass
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else:
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conf.env.append_value('ASFLAGS', flags)
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conf.env.append_unique('ENABLE_GCCDEPS', 'asm')
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if conf.env.CC_NAME in supported_compilers:
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try:
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conf.check(fragment='int main() { return 0; }', features='c force_gccdeps', cflags=flags, msg='Checking for c flags %r' % ''.join(flags))
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except Errors.ConfigurationError:
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pass
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else:
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conf.env.append_value('CFLAGS', flags)
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conf.env.append_unique('ENABLE_GCCDEPS', 'c')
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if conf.env.CXX_NAME in supported_compilers:
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try:
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conf.check(fragment='int main() { return 0; }', features='cxx force_gccdeps', cxxflags=flags, msg='Checking for cxx flags %r' % ''.join(flags))
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except Errors.ConfigurationError:
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pass
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else:
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conf.env.append_value('CXXFLAGS', flags)
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conf.env.append_unique('ENABLE_GCCDEPS', 'cxx')
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def options(opt):
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raise ValueError('Do not load gccdeps options')
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