From 084c6dd6352077e64f10cf7aa168f95d800f3819 Mon Sep 17 00:00:00 2001
From: Jonathan Ringer <jonringer117@gmail.com>
Date: Mon, 9 Nov 2020 10:24:35 -0800
Subject: [PATCH] CPython: Don't use ldconfig

---
 Lib/ctypes/util.py | 77 ++--------------------------------------------
 1 file changed, 2 insertions(+), 75 deletions(-)

diff --git a/Lib/ctypes/util.py b/Lib/ctypes/util.py
index 0c2510e..7fb98af 100644
--- a/Lib/ctypes/util.py
+++ b/Lib/ctypes/util.py
@@ -100,53 +100,7 @@ elif os.name == "posix":
             return thefile.read(4) == elf_header
 
     def _findLib_gcc(name):
-        # Run GCC's linker with the -t (aka --trace) option and examine the
-        # library name it prints out. The GCC command will fail because we
-        # haven't supplied a proper program with main(), but that does not
-        # matter.
-        expr = os.fsencode(r'[^\(\)\s]*lib%s\.[^\(\)\s]*' % re.escape(name))
-
-        c_compiler = shutil.which('gcc')
-        if not c_compiler:
-            c_compiler = shutil.which('cc')
-        if not c_compiler:
-            # No C compiler available, give up
-            return None
-
-        temp = tempfile.NamedTemporaryFile()
-        try:
-            args = [c_compiler, '-Wl,-t', '-o', temp.name, '-l' + name]
-
-            env = dict(os.environ)
-            env['LC_ALL'] = 'C'
-            env['LANG'] = 'C'
-            try:
-                proc = subprocess.Popen(args,
-                                        stdout=subprocess.PIPE,
-                                        stderr=subprocess.STDOUT,
-                                        env=env)
-            except OSError:  # E.g. bad executable
-                return None
-            with proc:
-                trace = proc.stdout.read()
-        finally:
-            try:
-                temp.close()
-            except FileNotFoundError:
-                # Raised if the file was already removed, which is the normal
-                # behaviour of GCC if linking fails
-                pass
-        res = re.findall(expr, trace)
-        if not res:
-            return None
-
-        for file in res:
-            # Check if the given file is an elf file: gcc can report
-            # some files that are linker scripts and not actual
-            # shared objects. See bpo-41976 for more details
-            if not _is_elf(file):
-                continue
-            return os.fsdecode(file)
+        return None
 
 
     if sys.platform == "sunos5":
@@ -268,34 +222,7 @@ elif os.name == "posix":
     else:
 
         def _findSoname_ldconfig(name):
-            import struct
-            if struct.calcsize('l') == 4:
-                machine = os.uname().machine + '-32'
-            else:
-                machine = os.uname().machine + '-64'
-            mach_map = {
-                'x86_64-64': 'libc6,x86-64',
-                'ppc64-64': 'libc6,64bit',
-                'sparc64-64': 'libc6,64bit',
-                's390x-64': 'libc6,64bit',
-                'ia64-64': 'libc6,IA-64',
-                }
-            abi_type = mach_map.get(machine, 'libc6')
-
-            # XXX assuming GLIBC's ldconfig (with option -p)
-            regex = r'\s+(lib%s\.[^\s]+)\s+\(%s'
-            regex = os.fsencode(regex % (re.escape(name), abi_type))
-            try:
-                with subprocess.Popen(['/sbin/ldconfig', '-p'],
-                                      stdin=subprocess.DEVNULL,
-                                      stderr=subprocess.DEVNULL,
-                                      stdout=subprocess.PIPE,
-                                      env={'LC_ALL': 'C', 'LANG': 'C'}) as p:
-                    res = re.search(regex, p.stdout.read())
-                    if res:
-                        return os.fsdecode(res.group(1))
-            except OSError:
-                pass
+            return None
 
         def _findLib_ld(name):
             # See issue #9998 for why this is needed
-- 
2.28.0