mirror of https://github.com/mpv-player/mpv
86 lines
3.2 KiB
Python
86 lines
3.2 KiB
Python
#! /usr/bin/env python
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# encoding: utf-8
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# Source: waflib/extras/syms.py from waf git 610d0d59f (New BSD License)
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"""
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this tool supports the export_symbols_regex to export the symbols in a shared library.
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by default, all symbols are exported by gcc, and nothing by msvc.
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to use the tool, do something like:
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def build(ctx):
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ctx(features='c cshlib syms', source='a.c b.c', export_symbols_regex='mylib_.*', target='testlib')
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only the symbols starting with 'mylib_' will be exported.
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"""
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import os
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import re
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from waflib.Context import STDOUT
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from waflib.Task import Task
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from waflib.Errors import WafError
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from waflib.TaskGen import feature, after_method
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class gen_sym(Task):
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def run(self):
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obj = self.inputs[0]
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kw = {}
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if 'msvc' in (self.env.CC_NAME, self.env.CXX_NAME):
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re_nm = re.compile(r'External\s+\|\s+_(' + self.generator.export_symbols_regex + r')\b')
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cmd = [self.env.DUMPBIN or 'dumpbin', '/symbols', obj.abspath()]
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# Dumpbin requires custom environment sniffed out by msvc.py earlier
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if self.env['PATH']:
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env = dict(self.env.env or os.environ)
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env.update(PATH = os.pathsep.join(self.env['PATH']))
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kw['env'] = env
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else:
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if self.env.DEST_BINFMT in ('pe', 'mac-o'): #gcc uses nm, and has a preceding _ on windows and osx
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re_nm = re.compile(r'T\s+_(' + self.generator.export_symbols_regex + r')\b')
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else:
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re_nm = re.compile(r'T\s+(' + self.generator.export_symbols_regex + r')\b')
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cmd = [self.env.NM or 'nm', '-g', obj.abspath()]
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syms = re_nm.findall(self.generator.bld.cmd_and_log(cmd, quiet=STDOUT, **kw))
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self.outputs[0].write('%r' % syms)
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class compile_sym(Task):
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def run(self):
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syms = {}
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for x in self.inputs:
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slist = eval(x.read())
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for s in slist:
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syms[s] = 1
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lsyms = list(syms.keys())
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lsyms.sort()
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if self.env.DEST_BINFMT == 'pe':
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self.outputs[0].write('EXPORTS\n' + '\n'.join(lsyms))
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elif self.env.DEST_BINFMT == 'elf':
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self.outputs[0].write('{ global:\n' + ';\n'.join(lsyms) + ";\nlocal: *; };\n")
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elif self.env.DEST_BINFMT == 'mac-o':
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self.outputs[0].write('\n'.join("_"+sym for sym in lsyms))
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else:
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raise WafError('NotImplemented')
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@feature('syms')
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@after_method('process_source', 'process_use', 'apply_link', 'process_uselib_local')
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def do_the_symbol_stuff(self):
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ins = [x.outputs[0] for x in self.compiled_tasks]
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self.gen_sym_tasks = [self.create_task('gen_sym', x, x.change_ext('.%d.sym' % self.idx)) for x in ins]
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tsk = self.create_task('compile_sym',
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[x.outputs[0] for x in self.gen_sym_tasks],
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self.path.find_or_declare(getattr(self, 'sym_filename', self.target + '.def')))
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self.link_task.set_run_after(tsk)
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self.link_task.dep_nodes.append(tsk.outputs[0])
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if 'msvc' in (self.env.CC_NAME, self.env.CXX_NAME):
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self.link_task.env.append_value('LINKFLAGS', ['/def:' + tsk.outputs[0].bldpath()])
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elif self.env.DEST_BINFMT == 'pe': #gcc on windows takes *.def as an additional input
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self.link_task.inputs.append(tsk.outputs[0])
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elif self.env.DEST_BINFMT == 'elf':
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self.link_task.env.append_value('LINKFLAGS', ['-Wl,-version-script', '-Wl,' + tsk.outputs[0].bldpath()])
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elif self.env.DEST_BINFMT == 'mac-o':
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self.link_task.env.append_value('LINKFLAGS', ['-exported_symbols_list', tsk.outputs[0].bldpath()])
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else:
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raise WafError('NotImplemented')
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