https://bugs.python.org/issue21622 Based on the patch from Alpine Linux https://git.alpinelinux.org/aports/tree/main/python2/musl-find_library.patch --- a/Lib/ctypes/util.py +++ b/Lib/ctypes/util.py @@ -92,6 +92,8 @@ elif sys.platform.startswith("aix"): elif os.name == "posix": # Andreas Degert's find functions, using gcc, /sbin/ldconfig, objdump import re, tempfile + from glob import glob + musl_ldso = glob('/lib/ld-musl-*.so.1') def _findLib_gcc(name): # Run GCC's linker with the -t (aka --trace) option and examine the @@ -252,6 +254,57 @@ elif os.name == "posix": def find_library(name, is64 = False): return _get_soname(_findLib_crle(name, is64) or _findLib_gcc(name)) + elif musl_ldso and os.path.isfile(musl_ldso[0]): + + def _is_elf(filepath): + try: + with open(filepath, 'rb') as fh: + return fh.read(4) == b'\x7fELF' + except: + return False + + def find_library(name): + # absolute name? + if os.path.isabs(name): + if _is_elf(name): + return name + else: + return None + + # special case for unified standard libs + stdlibs = ['libcrypt.so', 'libdl.so', 'libm.so', 'libpthread.so', 'libresolv.so', 'librt.so', 'libutil.so', 'libxnet.so'] + if name in stdlibs: + name = 'libc.so' + elif ('lib' + name + '.so') in stdlibs: + name = 'c' + + paths = [] + # read path list from /etc/ld-musl-$(ARCH).path + path_list = musl_ldso[0].replace('/lib/', '/etc/').replace('.so.1', '.path') + try: + with open(path_list, 'r') as fh: + paths = [path for line in fh for path in line.rstrip('\n').split(':') if path] + except: + paths = [] + # default path list if /etc/ld-musl-$(ARCH).path is empty or does not exist + if not paths: + paths = ['/lib', '/usr/local/lib', '/usr/lib'] + + # prepend paths from LD_LIBRARY_PATH + if 'LD_LIBRARY_PATH' in os.environ: + paths = os.environ['LD_LIBRARY_PATH'].split(':') + paths + + for d in paths: + f = os.path.join(d, name) + if _is_elf(f): + return os.path.basename(f) + + prefix = os.path.join(d, 'lib'+name) + for suffix in ['.so', '.so.*']: + for f in glob('{0}{1}'.format(prefix, suffix)): + if _is_elf(f): + return os.path.basename(f) + else: def _findSoname_ldconfig(name):