123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384 |
- #! /usr/bin/env python
- # encoding: utf-8
- """
- This tool supports the export_symbols_regex to export the symbols in a shared library.
- by default, all symbols are exported by gcc, and nothing by msvc.
- to use the tool, do something like:
- def build(ctx):
- ctx(features='c cshlib syms', source='a.c b.c', export_symbols_regex='mylib_.*', target='testlib')
- only the symbols starting with 'mylib_' will be exported.
- """
- import re
- from waflib.Context import STDOUT
- from waflib.Task import Task
- from waflib.Errors import WafError
- from waflib.TaskGen import feature, after_method
- class gen_sym(Task):
- def run(self):
- obj = self.inputs[0]
- kw = {}
- reg = getattr(self.generator, 'export_symbols_regex', '.+?')
- if 'msvc' in (self.env.CC_NAME, self.env.CXX_NAME):
- re_nm = re.compile(r'External\s+\|\s+_(?P<symbol>%s)\b' % reg)
- cmd = (self.env.DUMPBIN or ['dumpbin']) + ['/symbols', obj.abspath()]
- else:
- if self.env.DEST_BINFMT == 'pe': #gcc uses nm, and has a preceding _ on windows
- re_nm = re.compile(r'(T|D)\s+_(?P<symbol>%s)\b' % reg)
- elif self.env.DEST_BINFMT=='mac-o':
- re_nm=re.compile(r'(T|D)\s+(?P<symbol>_?%s)\b' % reg)
- else:
- re_nm = re.compile(r'(T|D)\s+(?P<symbol>%s)\b' % reg)
- cmd = (self.env.NM or ['nm']) + ['-g', obj.abspath()]
- syms = [m.group('symbol') for m in re_nm.finditer(self.generator.bld.cmd_and_log(cmd, quiet=STDOUT, **kw))]
- self.outputs[0].write('%r' % syms)
- class compile_sym(Task):
- def run(self):
- syms = {}
- for x in self.inputs:
- slist = eval(x.read())
- for s in slist:
- syms[s] = 1
- lsyms = list(syms.keys())
- lsyms.sort()
- if self.env.DEST_BINFMT == 'pe':
- self.outputs[0].write('EXPORTS\n' + '\n'.join(lsyms))
- elif self.env.DEST_BINFMT == 'elf':
- self.outputs[0].write('{ global:\n' + ';\n'.join(lsyms) + ";\nlocal: *; };\n")
- elif self.env.DEST_BINFMT=='mac-o':
- self.outputs[0].write('\n'.join(lsyms) + '\n')
- else:
- raise WafError('NotImplemented')
- @feature('syms')
- @after_method('process_source', 'process_use', 'apply_link', 'process_uselib_local', 'propagate_uselib_vars')
- def do_the_symbol_stuff(self):
- def_node = self.path.find_or_declare(getattr(self, 'sym_file', self.target + '.def'))
- compiled_tasks = getattr(self, 'compiled_tasks', None)
- if compiled_tasks:
- ins = [x.outputs[0] for x in compiled_tasks]
- self.gen_sym_tasks = [self.create_task('gen_sym', x, x.change_ext('.%d.sym' % self.idx)) for x in ins]
- self.create_task('compile_sym', [x.outputs[0] for x in self.gen_sym_tasks], def_node)
- link_task = getattr(self, 'link_task', None)
- if link_task:
- self.link_task.dep_nodes.append(def_node)
- if 'msvc' in (self.env.CC_NAME, self.env.CXX_NAME):
- self.link_task.env.append_value('LINKFLAGS', ['/def:' + def_node.bldpath()])
- elif self.env.DEST_BINFMT == 'pe':
- # gcc on windows takes *.def as an additional input
- self.link_task.inputs.append(def_node)
- elif self.env.DEST_BINFMT == 'elf':
- self.link_task.env.append_value('LINKFLAGS', ['-Wl,-version-script', '-Wl,' + def_node.bldpath()])
- elif self.env.DEST_BINFMT=='mac-o':
- self.link_task.env.append_value('LINKFLAGS',['-Wl,-exported_symbols_list,' + def_node.bldpath()])
- else:
- raise WafError('NotImplemented')
|