mirror of https://gitlab.com/ita1024/waf.git
124 lines
2.7 KiB
Python
124 lines
2.7 KiB
Python
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#!/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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"""
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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, after_method, feature
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lock = threading.Lock()
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preprocessor_flag = '-MD'
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@feature('cc')
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@before_method('apply_core')
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def add_mmd_cc(self):
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if self.env.get_flat('CFLAGS').find(preprocessor_flag) < 0:
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self.env.append_value('CFLAGS', [preprocessor_flag])
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@feature('cxx')
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@before_method('apply_core')
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def add_mmd_cxx(self):
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if self.env.get_flat('CXXFLAGS').find(preprocessor_flag) < 0:
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self.env.append_value('CXXFLAGS', [preprocessor_flag])
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def scan(self):
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"the scanner does not do anything initially"
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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("\.o$")
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def post_run(self):
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# The following code is executed by threads, it is not safe, so a lock is needed...
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if getattr(self, 'cached', None):
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return Task.Task.post_run(self)
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name = self.outputs[0].abspath()
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name = re_o.sub('.d', name)
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txt = Utils.readf(name)
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#os.unlink(name)
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txt = txt.replace('\\\n', '')
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lst = txt.strip().split(':')
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val = ":".join(lst[1:])
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val = val.split()
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nodes = []
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bld = self.generator.bld
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f = re.compile("^(\.\.)[\\/](.*)$")
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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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if not c_preproc.go_absolute:
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continue
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lock.acquire()
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try:
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node = bld.root.find_resource(x)
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finally:
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lock.release()
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else:
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path = bld.bldnode
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x = [k for k in Utils.split_path(x) if k and k != '.']
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while lst and x[0] == '..':
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x = x[1:]
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path = path.parent
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# when calling find_resource, make sure the path does not begin by '..'
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try:
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lock.acquire()
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node = path.find_resource(x)
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finally:
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lock.release()
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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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else:
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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: real scanner for %s returned %s' % (str(self), str(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:
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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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try:
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return Task.Task.sig_implicit_deps(self)
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except Errors.WafError:
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return Utils.SIG_NIL
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for name in 'cc cxx'.split():
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try:
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cls = Task.classes[name]
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except KeyError:
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pass
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else:
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cls.post_run = post_run
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cls.scan = scan
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cls.sig_implicit_deps = sig_implicit_deps
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