BLD: fix potential issue with escape sequences in __config__.py

Backport of #25669.

The current code isn't robust to backslashes (from path segments on
Windows) in linker flags. No bug report for NumPy, but the same problem
did show up in SciPy already. Fix is the same as scipy/scipy#19945.

This actually pulls in all of `__config__.py` from main because there
have been a number of other changes.

[skip cirrus] [skip circle]

numpy/__config__.py.in

@@ -1,7 +1,7 @@
 # This file is generated by numpy's build process
 # It contains system_info results at the time of building this package.
 from enum import Enum
-from numpy.core._multiarray_umath import (
+from numpy._core._multiarray_umath import (
     __cpu_features__,
     __cpu_baseline__,
     __cpu_dispatch__,
@@ -32,21 +32,27 @@ CONFIG = _cleanup(
         "Compilers": {
             "c": {
                 "name": "@C_COMP@",
-                "linker": "@C_COMP_LINKER_ID@",
+                "linker": r"@C_COMP_LINKER_ID@",
                 "version": "@C_COMP_VERSION@",
-                "commands": "@C_COMP_CMD_ARRAY@",
+                "commands": r"@C_COMP_CMD_ARRAY@",
+                "args": r"@C_COMP_ARGS@",
+                "linker args": r"@C_COMP_LINK_ARGS@",
             },
             "cython": {
                 "name": "@CYTHON_COMP@",
-                "linker": "@CYTHON_COMP_LINKER_ID@",
+                "linker": r"@CYTHON_COMP_LINKER_ID@",
                 "version": "@CYTHON_COMP_VERSION@",
-                "commands": "@CYTHON_COMP_CMD_ARRAY@",
+                "commands": r"@CYTHON_COMP_CMD_ARRAY@",
+                "args": r"@CYTHON_COMP_ARGS@",
+                "linker args": r"@CYTHON_COMP_LINK_ARGS@",
             },
             "c++": {
                 "name": "@CPP_COMP@",
-                "linker": "@CPP_COMP_LINKER_ID@",
+                "linker": r"@CPP_COMP_LINKER_ID@",
                 "version": "@CPP_COMP_VERSION@",
-                "commands": "@CPP_COMP_CMD_ARRAY@",
+                "commands": r"@CPP_COMP_CMD_ARRAY@",
+                "args": r"@CPP_COMP_ARGS@",
+                "linker args": r"@CPP_COMP_LINK_ARGS@",
             },
         },
         "Machine Information": {
@@ -72,7 +78,7 @@ CONFIG = _cleanup(
                 "detection method": "@BLAS_TYPE_NAME@",
                 "include directory": r"@BLAS_INCLUDEDIR@",
                 "lib directory": r"@BLAS_LIBDIR@",
-                "openblas configuration": "@BLAS_OPENBLAS_CONFIG@",
+                "openblas configuration": r"@BLAS_OPENBLAS_CONFIG@",
                 "pc file directory": r"@BLAS_PCFILEDIR@",
             },
             "lapack": {
@@ -82,7 +88,7 @@ CONFIG = _cleanup(
                 "detection method": "@LAPACK_TYPE_NAME@",
                 "include directory": r"@LAPACK_INCLUDEDIR@",
                 "lib directory": r"@LAPACK_LIBDIR@",
-                "openblas configuration": "@LAPACK_OPENBLAS_CONFIG@",
+                "openblas configuration": r"@LAPACK_OPENBLAS_CONFIG@",
                 "pc file directory": r"@LAPACK_PCFILEDIR@",
             },
         },