3 # Thomas Nagy, 2008-2010 (ita)
6 Execute the tasks with gcc -MD, read the dependencies from the .d file
7 and prepare the dependency calculation for the next run
10 import os, re, threading
11 import Task, Logs, Utils, preproc
12 from TaskGen import before, after, feature
14 lock = threading.Lock()
16 preprocessor_flag = '-MD'
21 if self.env.get_flat('CCFLAGS').find(preprocessor_flag) < 0:
22 self.env.append_value('CCFLAGS', preprocessor_flag)
26 def add_mmd_cxx(self):
27 if self.env.get_flat('CXXFLAGS').find(preprocessor_flag) < 0:
28 self.env.append_value('CXXFLAGS', preprocessor_flag)
31 "the scanner does not do anything initially"
32 nodes = self.generator.bld.node_deps.get(self.unique_id(), [])
36 re_o = re.compile("\.o$")
37 re_src = re.compile("^(\.\.)[\\/](.*)$")
40 # The following code is executed by threads, it is not safe, so a lock is needed...
42 if getattr(self, 'cached', None):
43 return Task.Task.post_run(self)
45 name = self.outputs[0].abspath(self.env)
46 name = re_o.sub('.d', name)
47 txt = Utils.readf(name)
50 txt = txt.replace('\\\n', '')
52 lst = txt.strip().split(':')
53 val = ":".join(lst[1:])
57 bld = self.generator.bld
59 f = re.compile("^("+self.env.variant()+"|\.\.)[\\/](.*)$")
63 if not preproc.go_absolute:
68 node = bld.root.find_resource(x)
72 g = re.search(re_src, x)
77 node = bld.bldnode.parent.find_resource(x)
86 node = bld.srcnode.find_resource(x)
90 if id(node) == id(self.inputs[0]):
91 # ignore the source file, it is already in the dependencies
92 # this way, successful config tests may be retrieved from the cache
96 raise ValueError('could not find %r for %r' % (x, self))
100 Logs.debug('deps: real scanner for %s returned %s' % (str(self), str(nodes)))
102 bld.node_deps[self.unique_id()] = nodes
103 bld.raw_deps[self.unique_id()] = []
110 Task.Task.post_run(self)
112 import Constants, Utils
113 def sig_implicit_deps(self):
115 return Task.Task.sig_implicit_deps(self)
116 except Utils.WafError:
117 return Constants.SIG_NIL
119 for name in 'cc cxx'.split():
121 cls = Task.TaskBase.classes[name]
125 cls.post_run = post_run
127 cls.sig_implicit_deps = sig_implicit_deps