copy xz config.h file from embedded version

config.h file is sourced from CPython's cpython-source-deps repo.

Author: jjhelmus

cpython-windows/build.py

@@ -625,7 +625,7 @@ def hack_project_files(
     static_replace_in_file(
         liblzma_path,
         b'<ClCompile Include="$(lzmaDir)src\\liblzma\\simple\\arm.c" />',
-        b'<ClCompile Include="$(lzmaDir)src\\liblzma\\simple\\arm.c" />\r\n    <ClCompile Include="$(lzmaDir)src\\liblzma\\simple\\arm64.c" />'
+        b'<ClCompile Include="$(lzmaDir)src\\liblzma\\simple\\arm.c" />\r\n    <ClCompile Include="$(lzmaDir)src\\liblzma\\simple\\arm64.c" />',
     )
     static_replace_in_file(
         liblzma_path,
@@ -1426,6 +1426,15 @@ def build_cpython(
             for f in fs:
                 f.result()
 
+        # Copy the config.h file used by upstream CPython for xz 5.8.1
+        # https://github.com/python/cpython-source-deps/blob/665d407bd6bc941944db2152e4b5dca388ea586e/windows/config.h
+        xz_version = DOWNLOADS["xz"]["version"]
+        xz_path = td / ("xz-%s" % xz_version)
+        config_src = SUPPORT / "xz-suport" / "config.h"
+        config_dest = xz_path / "windows" / "config.h"
+        log(f"copying {config_src} to {config_dest}")
+        shutil.copyfile(config_src, config_dest)
+
         extract_tar_to_directory(libffi_archive, td)
 
         # We need all the OpenSSL library files in the same directory to appease

cpython-windows/xz-support/README

@@ -0,0 +1,8 @@
+The upstream xz sources requires cmake to build on windows.
+This can be avoided by extracting a config.h file extracted from the CMake's 
+results, as is done by CPython.
+This file may need to be updated when upgrading the xz version.
+The file in this directory is taken from the xz branch of 
+https://github.com/python/cpython-source-deps.
+Specifically:
+https://github.com/python/cpython-source-deps/blob/665d407bd6bc941944db2152e4b5dca388ea586e/windows/config.h

cpython-windows/xz-support/config.h

@@ -0,0 +1,67 @@
+/* Configuration extracted from CMake'd project files.
+
+This is used by CPython, and is not part of the regular xz release.
+*/
+
+#define HAVE_CHECK_CRC32 1
+#define HAVE_CHECK_CRC64 1
+#define HAVE_CHECK_SHA256 1
+
+#define HAVE_DECODERS 1
+#define HAVE_DECODER_ARM 1
+#define HAVE_DECODER_ARM64 1
+#define HAVE_DECODER_ARMTHUMB 1
+#define HAVE_DECODER_DELTA 1
+#define HAVE_DECODER_IA64 1
+#define HAVE_DECODER_POWERPC 1
+#define HAVE_DECODER_LZMA1 1
+#define HAVE_DECODER_LZMA2 1
+#define HAVE_DECODER_SPARC 1
+#define HAVE_DECODER_X86 1
+
+#define HAVE_ENCODERS 1
+#define HAVE_ENCODER_ARM 1
+#define HAVE_ENCODER_ARM64 1
+#define HAVE_ENCODER_ARMTHUMB 1
+#define HAVE_ENCODER_DELTA 1
+#define HAVE_ENCODER_IA64 1
+#define HAVE_ENCODER_POWERPC 1
+#define HAVE_ENCODER_LZMA1 1
+#define HAVE_ENCODER_LZMA2 1
+#define HAVE_ENCODER_SPARC 1
+#define HAVE_ENCODER_X86 1
+
+#if defined(_M_ARM64)
+
+#undef HAVE_IMMINTRIN_H
+#undef HAVE_USABLE_CLMUL
+
+#else
+
+#define HAVE_IMMINTRIN_H 1
+#define HAVE_USABLE_CLMUL 1
+#define HAVE__MM_MOVEMASK_EPI8 1
+#define TUKLIB_FAST_UNALIGNED_ACCESS 1
+
+#endif
+
+#define HAVE___BUILTIN_ASSUME_ALIGNED 1
+#define HAVE__BOOL 1
+
+#define HAVE_INTTYPES_H 1
+#define HAVE_MF_BT2 1
+#define HAVE_MF_BT3 1
+#define HAVE_MF_BT4 1
+#define HAVE_MF_HC3 1
+#define HAVE_MF_HC4 1
+#define HAVE_STDBOOL_H 1
+#define HAVE_STDINT_H 1
+#define HAVE_VISIBILITY 0
+
+#define MYTHREAD_VISTA 1
+
+#define PACKAGE_BUGREPORT "xz@tukaani.org"
+#define PACKAGE_NAME "XZ Utils"
+#define PACKAGE_URL "https://tukaani.org/xz/"
+
+#define TUKLIB_SYMBOL_PREFIX lzma_