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authorDavid Robillard <d@drobilla.net>2018-09-15 14:51:03 +0200
committerDavid Robillard <d@drobilla.net>2018-09-15 14:51:03 +0200
commitc2b0355b0de23f6ec83b5fa5be038bcce208e26f (patch)
treeff0760d5f3f0e994413c8c1dff7a4fed37914bee /extras/unity.py
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Squashed 'waflib/' content from commit 982416b
git-subtree-dir: waflib git-subtree-split: 982416b8a6c6728e200243e1be3ab60435c08830
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+#! /usr/bin/env python
+# encoding: utf-8
+
+"""
+Compile whole groups of C/C++ files at once
+(C and C++ files are processed independently though).
+
+To enable globally::
+
+ def options(opt):
+ opt.load('compiler_cxx')
+ def build(bld):
+ bld.load('compiler_cxx unity')
+
+To enable for specific task generators only::
+
+ def build(bld):
+ bld(features='c cprogram unity', source='main.c', ...)
+
+The file order is often significant in such builds, so it can be
+necessary to adjust the order of source files and the batch sizes.
+To control the amount of files processed in a batch per target
+(the default is 50)::
+
+ def build(bld):
+ bld(features='c cprogram', unity_size=20)
+
+"""
+
+from waflib import Task, Options
+from waflib.Tools import c_preproc
+from waflib import TaskGen
+
+MAX_BATCH = 50
+
+EXTS_C = ('.c',)
+EXTS_CXX = ('.cpp','.cc','.cxx','.C','.c++')
+
+def options(opt):
+ global MAX_BATCH
+ opt.add_option('--batchsize', action='store', dest='batchsize', type='int', default=MAX_BATCH,
+ help='default unity batch size (0 disables unity builds)')
+
+@TaskGen.taskgen_method
+def batch_size(self):
+ default = getattr(Options.options, 'batchsize', MAX_BATCH)
+ if default < 1:
+ return 0
+ return getattr(self, 'unity_size', default)
+
+
+class unity(Task.Task):
+ color = 'BLUE'
+ scan = c_preproc.scan
+ def to_include(self, node):
+ ret = node.path_from(self.outputs[0].parent)
+ ret = ret.replace('\\', '\\\\').replace('"', '\\"')
+ return ret
+ def run(self):
+ lst = ['#include "%s"\n' % self.to_include(node) for node in self.inputs]
+ txt = ''.join(lst)
+ self.outputs[0].write(txt)
+ def __str__(self):
+ node = self.outputs[0]
+ return node.path_from(node.ctx.launch_node())
+
+def bind_unity(obj, cls_name, exts):
+ if not 'mappings' in obj.__dict__:
+ obj.mappings = dict(obj.mappings)
+
+ for j in exts:
+ fun = obj.mappings[j]
+ if fun.__name__ == 'unity_fun':
+ raise ValueError('Attempt to bind unity mappings multiple times %r' % j)
+
+ def unity_fun(self, node):
+ cnt = self.batch_size()
+ if cnt <= 1:
+ return fun(self, node)
+ x = getattr(self, 'master_%s' % cls_name, None)
+ if not x or len(x.inputs) >= cnt:
+ x = self.create_task('unity')
+ setattr(self, 'master_%s' % cls_name, x)
+
+ cnt_cur = getattr(self, 'cnt_%s' % cls_name, 0)
+ c_node = node.parent.find_or_declare('unity_%s_%d_%d.%s' % (self.idx, cnt_cur, cnt, cls_name))
+ x.outputs = [c_node]
+ setattr(self, 'cnt_%s' % cls_name, cnt_cur + 1)
+ fun(self, c_node)
+ x.inputs.append(node)
+
+ obj.mappings[j] = unity_fun
+
+@TaskGen.feature('unity')
+@TaskGen.before('process_source')
+def single_unity(self):
+ lst = self.to_list(self.features)
+ if 'c' in lst:
+ bind_unity(self, 'c', EXTS_C)
+ if 'cxx' in lst:
+ bind_unity(self, 'cxx', EXTS_CXX)
+
+def build(bld):
+ if bld.env.CC_NAME:
+ bind_unity(TaskGen.task_gen, 'c', EXTS_C)
+ if bld.env.CXX_NAME:
+ bind_unity(TaskGen.task_gen, 'cxx', EXTS_CXX)
+