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79 lines
2.0 KiB
Python
79 lines
2.0 KiB
Python
#! /usr/bin/env python
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# encoding: utf-8
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# Thomas Nagy, 2010 (ita)
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VERSION='0.0.1'
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APPNAME='crazy_test'
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top = '.'
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out = 'build'
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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')
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def build(bld):
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bld.program(source='main.cpp', target='app')
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"""
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Only main.cpp is added to the program, then by looking at the include files,
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a <file.h> file is found. If a corresponding <file.cpp> exists,
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then a new c++ task is created to compile that file and to add it to the
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program (modify the link task).
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The idea is to change the method runnable_status of the task. A more correct but less obvious
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approach would be the creation of a specific c++ subclass, and using another
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extension mapping function (@extension).
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"""
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from waflib.Task import ASK_LATER
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from waflib.Tools.cxx import cxx
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def runnable_status(self):
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ret = super(cxx, self).runnable_status()
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self.more_tasks = []
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# use a cache to avoid creating the same tasks
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# for example, truc.cpp might be compiled twice
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try:
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shared = self.generator.bld.shared_tasks
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except AttributeError:
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shared = self.generator.bld.shared_tasks = {}
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if ret != ASK_LATER:
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for x in self.generator.bld.node_deps[self.uid()]:
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node = x.parent.get_src().find_resource(x.name.replace('.h', '.cpp'))
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if node:
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try:
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tsk = shared[node]
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except:
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tsk = shared[node] = self.generator.cxx_hook(node)
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self.more_tasks.append(tsk)
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# add the node created to the link task outputs
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try:
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link = self.generator.link_task
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except AttributeError:
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pass
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else:
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if not tsk.outputs[0] in link.inputs:
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link.inputs.append(tsk.outputs[0])
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link.set_run_after(tsk)
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# any change in the order of the input nodes may cause a recompilation
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link.inputs.sort(key=lambda x: x.abspath())
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# if you want to modify some flags
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# you *must* have the task recompute the signature
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self.env.append_value('CXXFLAGS', '-O2')
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delattr(self, 'cache_sig')
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return super(cxx, self).runnable_status()
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return ret
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cxx.runnable_status = runnable_status
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