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109 lines
2.8 KiB
Python
109 lines
2.8 KiB
Python
#! /usr/bin/env python
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# encoding: utf-8
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"""
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Compile whole groups of C/C++ files at once
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(C and C++ files are processed independently though).
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To enable globally::
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def options(opt):
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opt.load('compiler_cxx')
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def build(bld):
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bld.load('compiler_cxx unity')
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To enable for specific task generators only::
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def build(bld):
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bld(features='c cprogram unity', source='main.c', ...)
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The file order is often significant in such builds, so it can be
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necessary to adjust the order of source files and the batch sizes.
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To control the amount of files processed in a batch per target
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(the default is 50)::
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def build(bld):
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bld(features='c cprogram', unity_size=20)
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"""
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from waflib import Task, Options
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from waflib.Tools import c_preproc
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from waflib import TaskGen
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MAX_BATCH = 50
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EXTS_C = ('.c',)
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EXTS_CXX = ('.cpp','.cc','.cxx','.C','.c++')
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def options(opt):
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global MAX_BATCH
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opt.add_option('--batchsize', action='store', dest='batchsize', type=int, default=MAX_BATCH,
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help='default unity batch size (0 disables unity builds)')
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@TaskGen.taskgen_method
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def batch_size(self):
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default = getattr(Options.options, 'batchsize', MAX_BATCH)
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if default < 1:
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return 0
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return getattr(self, 'unity_size', default)
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class unity(Task.Task):
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color = 'BLUE'
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scan = c_preproc.scan
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def to_include(self, node):
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ret = node.path_from(self.outputs[0].parent)
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ret = ret.replace('\\', '\\\\').replace('"', '\\"')
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return ret
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def run(self):
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lst = ['#include "%s"\n' % self.to_include(node) for node in self.inputs]
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txt = ''.join(lst)
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self.outputs[0].write(txt)
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def __str__(self):
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node = self.outputs[0]
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return node.path_from(node.ctx.launch_node())
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def bind_unity(obj, cls_name, exts):
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if not 'mappings' in obj.__dict__:
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obj.mappings = dict(obj.mappings)
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for j in exts:
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fun = obj.mappings[j]
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if fun.__name__ == 'unity_fun':
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raise ValueError('Attempt to bind unity mappings multiple times %r' % j)
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def unity_fun(self, node):
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cnt = self.batch_size()
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if cnt <= 1:
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return fun(self, node)
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x = getattr(self, 'master_%s' % cls_name, None)
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if not x or len(x.inputs) >= cnt:
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x = self.create_task('unity')
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setattr(self, 'master_%s' % cls_name, x)
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cnt_cur = getattr(self, 'cnt_%s' % cls_name, 0)
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c_node = node.parent.find_or_declare('unity_%s_%d_%d.%s' % (self.idx, cnt_cur, cnt, cls_name))
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x.outputs = [c_node]
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setattr(self, 'cnt_%s' % cls_name, cnt_cur + 1)
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fun(self, c_node)
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x.inputs.append(node)
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obj.mappings[j] = unity_fun
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@TaskGen.feature('unity')
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@TaskGen.before('process_source')
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def single_unity(self):
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lst = self.to_list(self.features)
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if 'c' in lst:
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bind_unity(self, 'c', EXTS_C)
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if 'cxx' in lst:
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bind_unity(self, 'cxx', EXTS_CXX)
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def build(bld):
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if bld.env.CC_NAME:
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bind_unity(TaskGen.task_gen, 'c', EXTS_C)
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if bld.env.CXX_NAME:
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bind_unity(TaskGen.task_gen, 'cxx', EXTS_CXX)
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