diff options
| -rw-r--r-- | recipes/gst-plugins-rs.recipe | 91 |
1 files changed, 90 insertions, 1 deletions
diff --git a/recipes/gst-plugins-rs.recipe b/recipes/gst-plugins-rs.recipe index 1d463c71..4792a6c5 100644 --- a/recipes/gst-plugins-rs.recipe +++ b/recipes/gst-plugins-rs.recipe @@ -2,6 +2,12 @@ from custom import GStreamer from cerbero.utils import messages as m from cerbero.utils import shell +from pathlib import Path +import re +import shutil +import subprocess +import tempfile + class Recipe(recipe.Recipe): name = 'gst-plugins-rs' @@ -160,5 +166,88 @@ class Recipe(recipe.Recipe): if f.endswith('.a')] for f in libraries: if self.config.target_platform == Platform.ANDROID: - shell.new_call([self.env['STRIP'], '--wildcard', '--strip-all', '--keep-symbol=gst_plugin_*', f], self.config.prefix, env=self.env) + shell.new_call([self.env['STRIP'], '--wildcard', '--strip-all', + '--keep-symbol=gst_plugin_*', f], self.config.prefix, env=self.env) + elif self.config.target_platform == Platform.IOS: + # Unlike ELF, for MachO Apple wants you to do + # Single-Object Prelink + source = Path(f) + + # Only global symbols + # Only symbol names + # Use portable output format + # Skip undefined symbols + # Write pathname of the object file + manifest = subprocess.check_output([self.get_llvm_tool('nm'), + '-gjPUA', source.absolute()], + universal_newlines=True, + text=True) + + # Now we need to match the symbols to the pattern + + # Here's the catch: Apple strip is silly enough to be unable to + # -undefined suppress a .o because of the -two_level_namespace being + # the default post-10.1. So we need to determine which objects have + # matching symbols. The rest can be safely stripped. + + # The symbol listing format is as follows: + # ./libgstrswebrtc.a[gstrswebrtc-3a8116aacab254c2.2u9b7sba8k2fvc9v.rcgu.o]: _gst_plugin_rswebrtc_get_desc T 500 0 + # Field 1 has the object name between brackets. + # Field 2 is the symbol name. + symbol_pattern = re.compile('_gst_plugin_*') + + with tempfile.TemporaryDirectory(prefix='cerbero', dir=self.config.home_dir) as tmp: + # List those symbols that will be kept + symbols_to_keep = set() + + for line in manifest.stdout.splitlines(): + data = line.split(' ') + symbol = data[1] + + if symbol_pattern.match(symbol): + symbols_to_keep.add(symbol) + + module = ( + Path(tmp) / source.name).with_suffix('.symbols') + + with module.open('w', encoding='utf-8') as f: + f.write('# Stripped by Cerbero\n') + + for symbol in symbols_to_keep: + f.write(f'{symbol}\n') + + m.log(f'Symbols to preserve in {source.absolute()}:') + for symbol in symbols_to_keep: + m.log(f'\t{symbol}') + + # Unpack archive + m.log(f"Unpacking {source.absolute()} with ar") + shell.new_call( + [shutil.which('ar'), 'xv', source.absolute()], cmd_dir=tmp, logfile=self.logfile) + + # Now everything is flat in the pwd + print('Performing Single-Object Prelinking') + prelinked_obj = ( + Path(tmp) / source.name).with_suffix('.prelinked.o') + cmd = ' '.join([ + shutil.which('ld'), + '-r', + '-exported_symbols_list', + module, + '-o', + prelinked_obj, + '*.o', + ]) + shell.new_call(cmd, cmd_dir=tmp, + shell=True, logfile=self.logfile) + + # With the stripping done, all files now need to be rearchived + dest = Path(tmp) / source.name + print(f'Repacking library to {dest.absolute()}') + shell.new_call([shutil.which('libtool'), '-static', '-o', + dest.absolute(), prelinked_obj.absolute()], logfile=self.logfile) + + # And now we paper over + os.replace(dest.absolute(), f) + super().post_install() |