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944debb156
mac-o symbols are prefixed with an underscore. when specifying multiple sub-regexes (e.g. 'sym1|sym2|sym3'), only the first will be matched (since the expansion turns into '(?P<symbol>_?sym1|sym2|sym3)'). here, this is remedied by wrapping the symbol regex in a paren group.
85 lines
3.1 KiB
Python
85 lines
3.1 KiB
Python
#! /usr/bin/env python
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# encoding: utf-8
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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 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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reg = getattr(self.generator, 'export_symbols_regex', '.+?')
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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+_(?P<symbol>%s)\b' % reg)
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cmd = (self.env.DUMPBIN or ['dumpbin']) + ['/symbols', obj.abspath()]
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else:
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if self.env.DEST_BINFMT == 'pe': #gcc uses nm, and has a preceding _ on windows
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re_nm = re.compile(r'(T|D)\s+_(?P<symbol>%s)\b' % reg)
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elif self.env.DEST_BINFMT=='mac-o':
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re_nm=re.compile(r'(T|D)\s+(?P<symbol>_?(%s))\b' % reg)
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else:
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re_nm = re.compile(r'(T|D)\s+(?P<symbol>%s)\b' % reg)
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cmd = (self.env.NM or ['nm']) + ['-g', obj.abspath()]
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syms = [m.group('symbol') for m in re_nm.finditer(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(lsyms) + '\n')
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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', 'propagate_uselib_vars')
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def do_the_symbol_stuff(self):
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def_node = self.path.find_or_declare(getattr(self, 'sym_file', self.target + '.def'))
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compiled_tasks = getattr(self, 'compiled_tasks', None)
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if compiled_tasks:
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ins = [x.outputs[0] for x in 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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self.create_task('compile_sym', [x.outputs[0] for x in self.gen_sym_tasks], def_node)
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link_task = getattr(self, 'link_task', None)
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if link_task:
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self.link_task.dep_nodes.append(def_node)
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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:' + def_node.bldpath()])
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elif self.env.DEST_BINFMT == 'pe':
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# gcc on windows takes *.def as an additional input
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self.link_task.inputs.append(def_node)
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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,' + def_node.bldpath()])
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elif self.env.DEST_BINFMT=='mac-o':
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self.link_task.env.append_value('LINKFLAGS',['-Wl,-exported_symbols_list,' + def_node.bldpath()])
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else:
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raise WafError('NotImplemented')
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