vibhatha commented on code in PR #40520:
URL: https://github.com/apache/arrow/pull/40520#discussion_r1555262817
##########
dev/archery/archery/linking.py:
##########
@@ -61,9 +64,71 @@ def list_dependency_names(self):
names.append(name)
return names
+ def _extract_symbols(self, symbol_info):
+ return [re.search(r'\S+$', line).group() for line in symbol_info if
line]
+
+ def _remove_weak_symbols(self, lines):
+ return [line for line in lines if not re.search(r'\s[Ww]\s', line)]
+
+ def list_symbols_for_dependency(self, dependency,
remove_symbol_versions=False):
+ result = _nm.run('-D', dependency, stdout=subprocess.PIPE)
+ lines = result.stdout.decode('utf-8').splitlines()
+ if remove_symbol_versions:
+ lines = [re.split('@@', line)[0] for line in lines]
+ return self._extract_symbols(lines)
+
+ def list_undefined_symbols_for_dependency(self, dependency,
+ remove_symbol_versions=False):
+ result = _nm.run('-u', dependency, stdout=subprocess.PIPE)
+ lines = result.stdout.decode('utf-8').splitlines()
+ if remove_symbol_versions:
+ lines = [re.split('@@', line)[0] for line in lines]
+ lines = self._remove_weak_symbols(lines)
+ return self._extract_symbols(lines)
+
+ def find_library_paths(self, libraries):
+ paths = {}
+ system = platform.system()
+ for lib in libraries:
+ paths[lib] = []
+ if system == 'Linux':
+ result = _ldconfig.run('-p', stdout=subprocess.PIPE)
Review Comment:
This is virtual one? What's actually happening here? My knowledge is limited
here?
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