Fix Windows SIZEOF_VOID_P and macOS llvmlite build errors

- Windows: replace -DSIZEOF_VOID_P=8 with -DMS_WIN64 to avoid
  conflict with pyconfig.h (MinGW doesn't define _M_X64 so
  pyconfig.h falls into 32-bit branch)
- macOS: remove numba from pyproject.toml build-system requires
  (numba/llvmlite not needed at build time, was failing because
  no pre-built llvmlite wheel for macosx_15_0_x86_64)
- Remove invalid pp* skip selector from pyproject.toml

Author: th1275

pyproject.toml

@@ -1,10 +1,10 @@
 #[build-system]
-#requires = ["setuptools>=42", "wheel", "Cython>=0.29.21", "numpy>=1.13.3", "numba>=0.58.0"]
+#requires = ["setuptools>=42", "wheel", "Cython>=0.29.21", "numpy>=1.13.3"]
 #build-backend = "setuptools.build_meta"
 #
 #[tool.cibuildwheel]
 ## Configuration for building wheels using cibuildwheel
-#skip = "pp* *-musllinux*"  # Skip PyPy and musllinux builds
+#skip = "*-musllinux*"  # Skip musllinux builds
 #
 ## Linux build configuration
 #[tool.cibuildwheel.linux]
@@ -20,12 +20,12 @@
 #CXXFLAGS = "-O3"
 
 [build-system]
-requires = ["setuptools>=42", "wheel", "Cython>=0.29.21", "numpy>=1.13.3", "numba>=0.58.0"]
+requires = ["setuptools>=42", "wheel", "Cython>=0.29.21", "numpy>=1.13.3"]
 build-backend = "setuptools.build_meta"
 
 [tool.cibuildwheel]
 # Configuration for building wheels using cibuildwheel
-skip = "pp* *-musllinux*"  # Skip PyPy and musllinux builds
+skip = "*-musllinux*"  # Skip musllinux builds
 
 # Linux build configuration
 [tool.cibuildwheel.linux]

setup.py

@@ -53,7 +53,12 @@ def force_mingw():
         "suitesparseconfig", "openblas"
     ]
     superlu_libraries = ["superlu", "openblas"]
-    extra_compile_args = ["-O3", "-DSIZEOF_VOID_P=8"]
+    # Use MS_WIN64 to help pyconfig.h detect 64-bit correctly with MinGW.
+    # Don't pass -DSIZEOF_VOID_P directly — it conflicts with pyconfig.h's own definition.
+    import struct
+    extra_compile_args = ["-O3"]
+    if struct.calcsize("P") == 8:
+        extra_compile_args.append("-DMS_WIN64")
     extra_link_args = []
 elif IS_LINUX:
     # On Linux, we'll use system libraries if available