SDL: Don't use getpagesize() on Windows

SDL Commits
1 
From ea8e66ccd16fa264a1f1b4b1530b64c415fc70ec Mon Sep 17 00:00:00 2001
From: Sam Lantinga <[EMAIL REDACTED]>
Date: Mon, 3 Nov 2025 08:36:29 -0800
Subject: [PATCH] Don't use getpagesize() on Windows

Fixes https://github.com/libsdl-org/SDL/issues/14328
---
 src/cpuinfo/SDL_cpuinfo.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/cpuinfo/SDL_cpuinfo.c b/src/cpuinfo/SDL_cpuinfo.c
index bdfb5a3b06935..c277db837a40f 100644
--- a/src/cpuinfo/SDL_cpuinfo.c
+++ b/src/cpuinfo/SDL_cpuinfo.c
@@ -29,7 +29,11 @@
 
 // CPU feature detection for SDL
 
-#if defined(HAVE_SYSCONF) || defined(HAVE_GETPAGESIZE)
+#if defined(HAVE_GETPAGESIZE) && !defined(SDL_PLATFORM_WINDOWS)
+#define USE_GETPAGESIZE
+#endif
+
+#if defined(HAVE_SYSCONF) || defined(USE_GETPAGESIZE)
 #include <unistd.h>
 #endif
 #ifdef HAVE_SYSCTLBYNAME
@@ -1252,7 +1256,7 @@ int SDL_GetSystemPageSize(void)
             }
         }
 #endif
-#ifdef HAVE_GETPAGESIZE
+#ifdef USE_GETPAGESIZE
         if (SDL_SystemPageSize <= 0) {
             SDL_SystemPageSize = getpagesize();
         }