mirror of
https://github.com/mpv-player/mpv
synced 2024-12-27 09:32:40 +00:00
08170c6a67
Current code stolen from waf's extras, only supported 'pe' and 'elf'. OS X uses the 'Mach-O' binary format (which waf calls 'mac-o'... go figure). Add support for generating the global symbols file with nm and using it from clang.
86 lines
3.2 KiB
Python
86 lines
3.2 KiB
Python
#! /usr/bin/env python
|
|
# encoding: utf-8
|
|
# Source: waflib/extras/syms.py from waf git 610d0d59f (New BSD License)
|
|
|
|
"""
|
|
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 os
|
|
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 = {}
|
|
if 'msvc' in (self.env.CC_NAME, self.env.CXX_NAME):
|
|
re_nm = re.compile(r'External\s+\|\s+_(' + self.generator.export_symbols_regex + r')\b')
|
|
cmd = [self.env.DUMPBIN or 'dumpbin', '/symbols', obj.abspath()]
|
|
|
|
# Dumpbin requires custom environment sniffed out by msvc.py earlier
|
|
if self.env['PATH']:
|
|
env = dict(self.env.env or os.environ)
|
|
env.update(PATH = os.pathsep.join(self.env['PATH']))
|
|
kw['env'] = env
|
|
|
|
else:
|
|
if self.env.DEST_BINFMT in ('pe', 'mac-o'): #gcc uses nm, and has a preceding _ on windows and osx
|
|
re_nm = re.compile(r'T\s+_(' + self.generator.export_symbols_regex + r')\b')
|
|
else:
|
|
re_nm = re.compile(r'T\s+(' + self.generator.export_symbols_regex + r')\b')
|
|
cmd = [self.env.NM or 'nm', '-g', obj.abspath()]
|
|
syms = re_nm.findall(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("_"+sym for sym in lsyms))
|
|
else:
|
|
raise WafError('NotImplemented')
|
|
|
|
@feature('syms')
|
|
@after_method('process_source', 'process_use', 'apply_link', 'process_uselib_local')
|
|
def do_the_symbol_stuff(self):
|
|
ins = [x.outputs[0] for x in self.compiled_tasks]
|
|
self.gen_sym_tasks = [self.create_task('gen_sym', x, x.change_ext('.%d.sym' % self.idx)) for x in ins]
|
|
|
|
tsk = self.create_task('compile_sym',
|
|
[x.outputs[0] for x in self.gen_sym_tasks],
|
|
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')
|
|
|