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-rw-r--r--Lib/ctypes/test/test_loading.py7
-rw-r--r--Lib/ctypes/util.py18
-rw-r--r--Misc/ACKS1
-rw-r--r--Misc/NEWS3
4 files changed, 22 insertions, 7 deletions
diff --git a/Lib/ctypes/test/test_loading.py b/Lib/ctypes/test/test_loading.py
index 4029b463bc..c6815faaf6 100644
--- a/Lib/ctypes/test/test_loading.py
+++ b/Lib/ctypes/test/test_loading.py
@@ -102,5 +102,12 @@ class LoaderTest(unittest.TestCase):
# This is the real test: call the function via 'call_function'
self.assertEqual(0, call_function(proc, (None,)))
+ if os.name != "nt":
+ def test_libc_exists(self):
+ # A basic test that the libc is found by find_library()
+ # XXX Can this fail on some non-Windows systems?
+ self.assertTrue(libc_name)
+ self.assertTrue(os.path.exists(libc_name))
+
if __name__ == "__main__":
unittest.main()
diff --git a/Lib/ctypes/util.py b/Lib/ctypes/util.py
index 1881e89688..3e8379f2f3 100644
--- a/Lib/ctypes/util.py
+++ b/Lib/ctypes/util.py
@@ -203,14 +203,18 @@ elif os.name == "posix":
abi_type = mach_map.get(machine, 'libc6')
# XXX assuming GLIBC's ldconfig (with option -p)
- expr = r'(\S+)\s+\((%s(?:, OS ABI:[^\)]*)?)\)[^/]*(/[^\(\)\s]*lib%s\.[^\(\)\s]*)' \
- % (abi_type, re.escape(name))
+ name = 'lib%s' % name
+ pat = re.compile('\s*(/[^\(\)\s]*%s\.[^\(\)\s]*)' % re.escape(name))
with contextlib.closing(os.popen('LC_ALL=C LANG=C /sbin/ldconfig -p 2>/dev/null')) as f:
- data = f.read()
- res = re.search(expr, data)
- if not res:
- return None
- return res.group(1)
+ for line in f:
+ if not '=>' in line:
+ continue
+ path = line.rsplit('=>', 1)[1]
+ if not name+'.' in path:
+ continue
+ res = pat.search(path)
+ if res:
+ return res.group(1)
def find_library(name):
return _findSoname_ldconfig(name) or _get_soname(_findLib_gcc(name))
diff --git a/Misc/ACKS b/Misc/ACKS
index 8066ebcc16..20e9b0bd68 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -329,6 +329,7 @@ Dag Gruneau
Michael Guravage
Lars Gustäbel
Thomas Güttler
+Jonas H.
Barry Haddow
Paul ten Hagen
Rasmus Hahn
diff --git a/Misc/NEWS b/Misc/NEWS
index 30fa398ab9..3d0abee2dd 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -35,6 +35,9 @@ Core and Builtins
Library
-------
+- Issue #11258: Speed up ctypes.util.find_library() under Linux a lot. Patch
+ by Jonas H.
+
- Issue #11297: Add collections.ChainMap().
- Issue #10755: Add the posix.fdlistdir() function. Patch by Ross Lagerwall.