3 # Before a shared module's DSO is produced, a static library is built for it
4 # and passed to this script. The script generates -Wl,-u options to force
5 # the inclusion of symbol from libqemuutil.a if the shared modules need them,
6 # This is necessary because the modules may use functions not needed by the
7 # executable itself, which would cause the function to not be linked in.
8 # Then the DSO loading would fail because of the missing symbol.
14 def filter_lines_set(stdout, from_staticlib):
16 for line in stdout.splitlines():
17 tokens = line.split(b' ')
19 if from_staticlib and tokens[1] == b'U':
21 if not from_staticlib and tokens[1] != b'U':
23 new_line = b'-Wl,-u,' + tokens[0]
24 if not new_line in linesSet:
25 linesSet.add(new_line)
34 pc = subprocess.run([nm, "-P", "-g", staticlib], stdout=subprocess.PIPE)
35 if pc.returncode != 0:
37 staticlib_syms = filter_lines_set(pc.stdout, True)
39 shared_modules = args[3:]
40 pc = subprocess.run([nm, "-P", "-g"] + shared_modules, stdout=subprocess.PIPE)
41 if pc.returncode != 0:
43 modules_undef_syms = filter_lines_set(pc.stdout, False)
44 lines = sorted(staticlib_syms.intersection(modules_undef_syms))
45 sys.stdout.buffer.write(b'\n'.join(lines))
47 if __name__ == "__main__":