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Commit | Line | Data |
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604f3e4e YL |
1 | #!/usr/bin/env python3 |
2 | ||
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. | |
9 | ||
10 | ||
11 | import sys | |
12 | import subprocess | |
13 | ||
14 | def filter_lines_set(stdout, from_staticlib): | |
15 | linesSet = set() | |
16 | for line in stdout.splitlines(): | |
17 | tokens = line.split(b' ') | |
da0dfe25 PB |
18 | if len(tokens) >= 2: |
19 | if from_staticlib and tokens[1] == b'U': | |
20 | continue | |
21 | if not from_staticlib and tokens[1] != b'U': | |
22 | continue | |
604f3e4e YL |
23 | new_line = b'-Wl,-u,' + tokens[0] |
24 | if not new_line in linesSet: | |
25 | linesSet.add(new_line) | |
26 | return linesSet | |
27 | ||
28 | def main(args): | |
29 | if len(args) <= 3: | |
30 | sys.exit(0) | |
31 | ||
32 | nm = args[1] | |
33 | staticlib = args[2] | |
34 | pc = subprocess.run([nm, "-P", "-g", staticlib], stdout=subprocess.PIPE) | |
35 | if pc.returncode != 0: | |
36 | sys.exit(1) | |
37 | staticlib_syms = filter_lines_set(pc.stdout, True) | |
38 | ||
39 | shared_modules = args[3:] | |
40 | pc = subprocess.run([nm, "-P", "-g"] + shared_modules, stdout=subprocess.PIPE) | |
41 | if pc.returncode != 0: | |
42 | sys.exit(1) | |
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)) | |
46 | ||
47 | if __name__ == "__main__": | |
48 | main(sys.argv) |