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Python
1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253#! /usr/bin/env python# encoding: utf-8# Original source: waflib/extras/syms.py from waf git 610d0d59f (New BSD License)
"""set the list of symbols exported from a dynamic libraryto use the tool, do something like:
def build(ctx): ctx(features='c cshlib syms', source='a.c b.c', export_symbols_def='syms.def', target='testlib')
only the symbols listed in the file syms.def will be exported."""
from waflib.Context import STDOUTfrom waflib.Task import Taskfrom waflib.Errors import WafErrorfrom waflib.TaskGen import feature, after_method
class compile_sym(Task): def run(self): lsyms = [] for line in self.inputs[0].read().split(): lsyms.append(line.strip()) 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("_"+sym for sym in 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): tsk = self.create_task('compile_sym', [self.path.find_node(self.export_symbols_def)], self.path.find_or_declare(getattr(self, 'sym_filename', self.target + '.def'))) self.link_task.set_run_after(tsk) self.link_task.dep_nodes.append(tsk.outputs[0]) if 'msvc' in (self.env.CC_NAME, self.env.CXX_NAME): self.link_task.env.append_value('LINKFLAGS', ['/def:' + tsk.outputs[0].bldpath()]) elif self.env.DEST_BINFMT == 'pe': #gcc on windows takes *.def as an additional input self.link_task.inputs.append(tsk.outputs[0]) elif self.env.DEST_BINFMT == 'elf': self.link_task.env.append_value('LINKFLAGS', ['-Wl,-version-script', '-Wl,' + tsk.outputs[0].bldpath()]) elif self.env.DEST_BINFMT == 'mac-o': self.link_task.env.append_value('LINKFLAGS', ['-exported_symbols_list', tsk.outputs[0].bldpath()]) else: raise WafError('NotImplemented')