Change:
Describe the bug Can be noticed when building . Since To Reproduce Steps to reproduce the behavior: ... ... ... Expected behavior A clear and concise description of what you expected to happen. Screenshots If applicable, add screenshots to help explain your problem. Additional context Add any other context about the problem here. Notify maintainers <!-- Please @ people who are in the list of the offending package or module. If in doubt, check for whoever last touched something. --Metadata Nixpkgs at Maintainer information:
is this still relevant with ?
nope fixed with

Discussion:
# libuuid, slowing down program startup a lot). ./no-ldconfig.patch <ins> # Fix ctypes.util.find_library with gcc10. ./find_library-gcc10.patch </ins> ] ++ optionals stdenv.hostPlatform.isCygwin [ ./2.5.2-ctypes-util-find_library.patch ./2.5.2-tkinter-x11.patch

<ins> Backport https://github.com/python/cpython/commit/82df3b3071bb003247c33eac4670775e9883c994 and https://github.com/python/cpython/commit/27ac19cca2c639caaf6fedf3632fe6beb265f24f Fixes the check phase of python2Packages.cffi. --- a/Lib/ctypes/util.py +++ b/Lib/ctypes/util.py @@ -87,6 +87,12 @@ elif os.name == "posix": # Andreas Degert's find functions, using gcc, /sbin/ldconfig, objdump import re, tempfile, errno +    def _is_elf(filename): +        "Return True if the given file is an ELF file" +        elf_header = b'x7fELF' +        with open(filename, 'rb') as thefile: +            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 @@ -110,10 +116,17 @@ elif os.name == "posix": # the normal behaviour of GCC if linking fails if e.errno != errno.ENOENT: raise -        res = re.search(expr, trace) +        res = re.findall(expr, trace) if not res: return None -        return res.group(0) + +        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 file if sys.platform == "sunos5": @@ -237,8 +250,37 @@ elif os.name == "posix": def _findSoname_ldconfig(name): return None +        def _findLib_ld(name): +            # See issue #9998 for why this is needed +            expr = r'[^()s]*lib%s.[^()s]*' % re.escape(name) +            cmd = ['ld', '-t'] +            libpath = os.environ.get('LD_LIBRARY_PATH') +            if libpath: +                for d in libpath.split(':'): +                    cmd.extend(['-L', d]) +            cmd.extend(['-o', os.devnull, '-l%s' % name]) +            result = None +            try: +                p = subprocess.Popen(cmd, stdout=subprocess.PIPE, +                                     stderr=subprocess.PIPE, +                                     universal_newlines=True) +                out, _ = p.communicate() +                res = re.findall(expr, out) +                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 file +            except Exception: +                pass  # result will be None +            return result + def find_library(name): -            return _findSoname_ldconfig(name) or _get_soname(_findLib_gcc(name)) +            # See issue #9998 +            return _findSoname_ldconfig(name) or  +                   _get_soname(_findLib_gcc(name)) or _get_soname(_findLib_ld(name)) ################################################################ # test code </ins>