--- a/lib/python3.8/site-packages/wheel/macosx_libfile.py	Mon Jul 27 03:47:31 2020 -0400
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,341 +0,0 @@
-"""
-This module contains function to analyse dynamic library
-headers to extract system information
-
-Currently only for MacOSX
-
-Library file on macosx system starts with Mach-O or Fat field.
-This can be distinguish by first 32 bites and it is called magic number.
-Proper value of magic number is with suffix _MAGIC. Suffix _CIGAM means
-reversed bytes order.
-Both fields can occur in two types: 32 and 64 bytes.
-
-FAT field inform that this library contains few version of library
-(typically for different types version). It contains
-information where Mach-O headers starts.
-
-Each section started with Mach-O header contains one library
-(So if file starts with this field it contains only one version).
-
-After filed Mach-O there are section fields.
-Each of them starts with two fields:
-cmd - magic number for this command
-cmdsize - total size occupied by this section information.
-
-In this case only sections LC_VERSION_MIN_MACOSX (for macosx 10.13 and earlier)
-and LC_BUILD_VERSION (for macosx 10.14 and newer) are interesting,
-because them contains information about minimal system version.
-
-Important remarks:
-- For fat files this implementation looks for maximum number version.
-  It not check if it is 32 or 64 and do not compare it with currently builded package.
-  So it is possible to false report higher version that needed.
-- All structures signatures are taken form macosx header files.
-- I think that binary format will be more stable than `otool` output.
-  and if apple introduce some changes both implementation will need to be updated.
-"""
-
-import ctypes
-import sys
-
-"""here the needed const and struct from mach-o header files"""
-
-FAT_MAGIC = 0xcafebabe
-FAT_CIGAM = 0xbebafeca
-FAT_MAGIC_64 = 0xcafebabf
-FAT_CIGAM_64 = 0xbfbafeca
-MH_MAGIC = 0xfeedface
-MH_CIGAM = 0xcefaedfe
-MH_MAGIC_64 = 0xfeedfacf
-MH_CIGAM_64 = 0xcffaedfe
-
-LC_VERSION_MIN_MACOSX = 0x24
-LC_BUILD_VERSION = 0x32
-
-
-mach_header_fields = [
-        ("magic", ctypes.c_uint32), ("cputype", ctypes.c_int),
-        ("cpusubtype", ctypes.c_int), ("filetype", ctypes.c_uint32),
-        ("ncmds", ctypes.c_uint32), ("sizeofcmds", ctypes.c_uint32),
-        ("flags", ctypes.c_uint32)
-    ]
-"""
-struct mach_header {
-    uint32_t	magic;		/* mach magic number identifier */
-    cpu_type_t	cputype;	/* cpu specifier */
-    cpu_subtype_t	cpusubtype;	/* machine specifier */
-    uint32_t	filetype;	/* type of file */
-    uint32_t	ncmds;		/* number of load commands */
-    uint32_t	sizeofcmds;	/* the size of all the load commands */
-    uint32_t	flags;		/* flags */
-};
-typedef integer_t cpu_type_t;
-typedef integer_t cpu_subtype_t;
-"""
-
-mach_header_fields_64 = mach_header_fields + [("reserved", ctypes.c_uint32)]
-"""
-struct mach_header_64 {
-    uint32_t	magic;		/* mach magic number identifier */
-    cpu_type_t	cputype;	/* cpu specifier */
-    cpu_subtype_t	cpusubtype;	/* machine specifier */
-    uint32_t	filetype;	/* type of file */
-    uint32_t	ncmds;		/* number of load commands */
-    uint32_t	sizeofcmds;	/* the size of all the load commands */
-    uint32_t	flags;		/* flags */
-    uint32_t	reserved;	/* reserved */
-};
-"""
-
-fat_header_fields = [("magic", ctypes.c_uint32), ("nfat_arch", ctypes.c_uint32)]
-"""
-struct fat_header {
-    uint32_t	magic;		/* FAT_MAGIC or FAT_MAGIC_64 */
-    uint32_t	nfat_arch;	/* number of structs that follow */
-};
-"""
-
-fat_arch_fields = [
-    ("cputype", ctypes.c_int), ("cpusubtype", ctypes.c_int),
-    ("offset", ctypes.c_uint32), ("size", ctypes.c_uint32),
-    ("align", ctypes.c_uint32)
-]
-"""
-struct fat_arch {
-    cpu_type_t	cputype;	/* cpu specifier (int) */
-    cpu_subtype_t	cpusubtype;	/* machine specifier (int) */
-    uint32_t	offset;		/* file offset to this object file */
-    uint32_t	size;		/* size of this object file */
-    uint32_t	align;		/* alignment as a power of 2 */
-};
-"""
-
-fat_arch_64_fields = [
-    ("cputype", ctypes.c_int), ("cpusubtype", ctypes.c_int),
-    ("offset", ctypes.c_uint64), ("size", ctypes.c_uint64),
-    ("align", ctypes.c_uint32), ("reserved", ctypes.c_uint32)
-]
-"""
-struct fat_arch_64 {
-    cpu_type_t	cputype;	/* cpu specifier (int) */
-    cpu_subtype_t	cpusubtype;	/* machine specifier (int) */
-    uint64_t	offset;		/* file offset to this object file */
-    uint64_t	size;		/* size of this object file */
-    uint32_t	align;		/* alignment as a power of 2 */
-    uint32_t	reserved;	/* reserved */
-};
-"""
-
-segment_base_fields = [("cmd", ctypes.c_uint32), ("cmdsize", ctypes.c_uint32)]
-"""base for reading segment info"""
-
-segment_command_fields = [
-    ("cmd", ctypes.c_uint32), ("cmdsize", ctypes.c_uint32),
-    ("segname", ctypes.c_char * 16), ("vmaddr", ctypes.c_uint32),
-    ("vmsize", ctypes.c_uint32), ("fileoff", ctypes.c_uint32),
-    ("filesize", ctypes.c_uint32), ("maxprot", ctypes.c_int),
-    ("initprot", ctypes.c_int), ("nsects", ctypes.c_uint32),
-    ("flags", ctypes.c_uint32),
-    ]
-"""
-struct segment_command { /* for 32-bit architectures */
-    uint32_t	cmd;		/* LC_SEGMENT */
-    uint32_t	cmdsize;	/* includes sizeof section structs */
-    char		segname[16];	/* segment name */
-    uint32_t	vmaddr;		/* memory address of this segment */
-    uint32_t	vmsize;		/* memory size of this segment */
-    uint32_t	fileoff;	/* file offset of this segment */
-    uint32_t	filesize;	/* amount to map from the file */
-    vm_prot_t	maxprot;	/* maximum VM protection */
-    vm_prot_t	initprot;	/* initial VM protection */
-    uint32_t	nsects;		/* number of sections in segment */
-    uint32_t	flags;		/* flags */
-};
-typedef int vm_prot_t;
-"""
-
-segment_command_fields_64 = [
-    ("cmd", ctypes.c_uint32), ("cmdsize", ctypes.c_uint32),
-    ("segname", ctypes.c_char * 16), ("vmaddr", ctypes.c_uint64),
-    ("vmsize", ctypes.c_uint64), ("fileoff", ctypes.c_uint64),
-    ("filesize", ctypes.c_uint64), ("maxprot", ctypes.c_int),
-    ("initprot", ctypes.c_int), ("nsects", ctypes.c_uint32),
-    ("flags", ctypes.c_uint32),
-    ]
-"""
-struct segment_command_64 { /* for 64-bit architectures */
-    uint32_t	cmd;		/* LC_SEGMENT_64 */
-    uint32_t	cmdsize;	/* includes sizeof section_64 structs */
-    char		segname[16];	/* segment name */
-    uint64_t	vmaddr;		/* memory address of this segment */
-    uint64_t	vmsize;		/* memory size of this segment */
-    uint64_t	fileoff;	/* file offset of this segment */
-    uint64_t	filesize;	/* amount to map from the file */
-    vm_prot_t	maxprot;	/* maximum VM protection */
-    vm_prot_t	initprot;	/* initial VM protection */
-    uint32_t	nsects;		/* number of sections in segment */
-    uint32_t	flags;		/* flags */
-};
-"""
-
-version_min_command_fields = segment_base_fields + \
-    [("version", ctypes.c_uint32), ("sdk", ctypes.c_uint32)]
-"""
-struct version_min_command {
-    uint32_t	cmd;		/* LC_VERSION_MIN_MACOSX or
-                               LC_VERSION_MIN_IPHONEOS or
-                               LC_VERSION_MIN_WATCHOS or
-                               LC_VERSION_MIN_TVOS */
-    uint32_t	cmdsize;	/* sizeof(struct min_version_command) */
-    uint32_t	version;	/* X.Y.Z is encoded in nibbles xxxx.yy.zz */
-    uint32_t	sdk;		/* X.Y.Z is encoded in nibbles xxxx.yy.zz */
-};
-"""
-
-build_version_command_fields = segment_base_fields + \
-    [("platform", ctypes.c_uint32), ("minos", ctypes.c_uint32),
-     ("sdk", ctypes.c_uint32), ("ntools", ctypes.c_uint32)]
-"""
-struct build_version_command {
-    uint32_t	cmd;		/* LC_BUILD_VERSION */
-    uint32_t	cmdsize;	/* sizeof(struct build_version_command) plus */
-                                /* ntools * sizeof(struct build_tool_version) */
-    uint32_t	platform;	/* platform */
-    uint32_t	minos;		/* X.Y.Z is encoded in nibbles xxxx.yy.zz */
-    uint32_t	sdk;		/* X.Y.Z is encoded in nibbles xxxx.yy.zz */
-    uint32_t	ntools;		/* number of tool entries following this */
-};
-"""
-
-
-def swap32(x):
-    return (((x << 24) & 0xFF000000) |
-            ((x << 8) & 0x00FF0000) |
-            ((x >> 8) & 0x0000FF00) |
-            ((x >> 24) & 0x000000FF))
-
-
-def get_base_class_and_magic_number(lib_file, seek=None):
-    if seek is None:
-        seek = lib_file.tell()
-    else:
-        lib_file.seek(seek)
-    magic_number = ctypes.c_uint32.from_buffer_copy(
-        lib_file.read(ctypes.sizeof(ctypes.c_uint32))).value
-
-    # Handle wrong byte order
-    if magic_number in [FAT_CIGAM, FAT_CIGAM_64, MH_CIGAM, MH_CIGAM_64]:
-        if sys.byteorder == "little":
-            BaseClass = ctypes.BigEndianStructure
-        else:
-            BaseClass = ctypes.LittleEndianStructure
-
-        magic_number = swap32(magic_number)
-    else:
-        BaseClass = ctypes.Structure
-
-    lib_file.seek(seek)
-    return BaseClass, magic_number
-
-
-def read_data(struct_class, lib_file):
-    return struct_class.from_buffer_copy(lib_file.read(
-                        ctypes.sizeof(struct_class)))
-
-
-def extract_macosx_min_system_version(path_to_lib):
-    with open(path_to_lib, "rb") as lib_file:
-        BaseClass, magic_number = get_base_class_and_magic_number(lib_file, 0)
-        if magic_number not in [FAT_MAGIC, FAT_MAGIC_64, MH_MAGIC, MH_MAGIC_64]:
-            return
-
-        if magic_number in [FAT_MAGIC, FAT_CIGAM_64]:
-            class FatHeader(BaseClass):
-                _fields_ = fat_header_fields
-
-            fat_header = read_data(FatHeader, lib_file)
-            if magic_number == FAT_MAGIC:
-
-                class FatArch(BaseClass):
-                    _fields_ = fat_arch_fields
-            else:
-
-                class FatArch(BaseClass):
-                    _fields_ = fat_arch_64_fields
-
-            fat_arch_list = [read_data(FatArch, lib_file) for _ in range(fat_header.nfat_arch)]
-
-            versions_list = []
-            for el in fat_arch_list:
-                try:
-                    version = read_mach_header(lib_file, el.offset)
-                    if version is not None:
-                        versions_list.append(version)
-                except ValueError:
-                    pass
-
-            if len(versions_list) > 0:
-                return max(versions_list)
-            else:
-                return None
-
-        else:
-            try:
-                return read_mach_header(lib_file, 0)
-            except ValueError:
-                """when some error during read library files"""
-                return None
-
-
-def read_mach_header(lib_file, seek=None):
-    """
-    This funcition parse mach-O header and extract
-    information about minimal system version
-
-    :param lib_file: reference to opened library file with pointer
-    """
-    if seek is not None:
-        lib_file.seek(seek)
-    base_class, magic_number = get_base_class_and_magic_number(lib_file)
-    arch = "32" if magic_number == MH_MAGIC else "64"
-
-    class SegmentBase(base_class):
-        _fields_ = segment_base_fields
-
-    if arch == "32":
-
-        class MachHeader(base_class):
-            _fields_ = mach_header_fields
-
-    else:
-
-        class MachHeader(base_class):
-            _fields_ = mach_header_fields_64
-
-    mach_header = read_data(MachHeader, lib_file)
-    for _i in range(mach_header.ncmds):
-        pos = lib_file.tell()
-        segment_base = read_data(SegmentBase, lib_file)
-        lib_file.seek(pos)
-        if segment_base.cmd == LC_VERSION_MIN_MACOSX:
-            class VersionMinCommand(base_class):
-                _fields_ = version_min_command_fields
-
-            version_info = read_data(VersionMinCommand, lib_file)
-            return parse_version(version_info.version)
-        elif segment_base.cmd == LC_BUILD_VERSION:
-            class VersionBuild(base_class):
-                _fields_ = build_version_command_fields
-
-            version_info = read_data(VersionBuild, lib_file)
-            return parse_version(version_info.minos)
-        else:
-            lib_file.seek(pos + segment_base.cmdsize)
-            continue
-
-
-def parse_version(version):
-    x = (version & 0xffff0000) >> 16
-    y = (version & 0x0000ff00) >> 8
-    z = (version & 0x000000ff)
-    return x, y, z