diff -rupN --no-dereference Pillow-10.1.0/setup.py Pillow-10.1.0-new/setup.py

--- Pillow-10.1.0/setup.py	2023-10-15 10:59:17.000000000 +0200

+++ Pillow-10.1.0-new/setup.py	2023-10-15 17:05:40.196995053 +0200

@@ -136,7 +136,7 @@ class RequiredDependencyException(Except

     pass

-PLATFORM_MINGW = os.name == "nt" and "GCC" in sys.version

+PLATFORM_MINGW = "mingw32" in os.getenv("CC", "")

 def _dbg(s, tp=None):

@@ -509,7 +509,7 @@ class pil_build_ext(build_ext):

         #

         # add platform directories

-        if self.disable_platform_guessing:

+        if self.disable_platform_guessing or PLATFORM_MINGW:

             pass

         elif sys.platform == "cygwin":

@@ -600,7 +600,7 @@ class pil_build_ext(build_ext):

         # FIXME: check /opt/stuff directories here?

         # standard locations

-        if not self.disable_platform_guessing:

+        if not self.disable_platform_guessing and not PLATFORM_MINGW:

             _add_directory(library_dirs, "/usr/local/lib")

             _add_directory(include_dirs, "/usr/local/include")

@@ -842,7 +842,7 @@ class pil_build_ext(build_ext):

         if feature.xcb:

             libs.append(feature.xcb)

             defs.append(("HAVE_XCB", None))

-        if sys.platform == "win32":

+        if sys.platform == "win32" or PLATFORM_MINGW:

             libs.extend(["kernel32", "user32", "gdi32"])

         if struct.unpack("h", b"\0\1")[0] == 1:

             defs.append(("WORDS_BIGENDIAN", None))

@@ -857,6 +857,8 @@ class pil_build_ext(build_ext):

         if feature.freetype:

             srcs = []

             libs = ["freetype"]

+            if sys.platform == "win32" or PLATFORM_MINGW:

+                libs.extend(["dl"])

             defs = []

             if feature.raqm:

                 if not feature.want_vendor("raqm"):  # using system Raqm

@@ -879,7 +881,7 @@ class pil_build_ext(build_ext):

         if feature.lcms:

             extra = []

-            if sys.platform == "win32":

+            if sys.platform == "win32" or PLATFORM_MINGW:

                 extra.extend(["user32", "gdi32"])

             self._update_extension("PIL._imagingcms", [feature.lcms] + extra)

         else:

@@ -898,7 +900,7 @@ class pil_build_ext(build_ext):

         else:

             self._remove_extension("PIL._webp")

-        tk_libs = ["psapi"] if sys.platform in ("win32", "cygwin") else []

+        tk_libs = ["psapi"] if sys.platform in ("win32", "cygwin") or PLATFORM_MINGW else []

         self._update_extension("PIL._imagingtk", tk_libs)

         build_ext.build_extensions(self)

diff -rupN --no-dereference Pillow-10.1.0/src/libImaging/ImPlatform.h Pillow-10.1.0-new/src/libImaging/ImPlatform.h

--- Pillow-10.1.0/src/libImaging/ImPlatform.h	2023-10-15 10:59:17.000000000 +0200

+++ Pillow-10.1.0-new/src/libImaging/ImPlatform.h	2023-10-15 17:05:40.196995053 +0200

@@ -28,7 +28,7 @@

 #if defined(_WIN32) || defined(__CYGWIN__) /* WIN */

 #define WIN32_LEAN_AND_MEAN

-#include <Windows.h>

+#include <windows.h>

 #ifdef __CYGWIN__

 #undef _WIN64