EGLNativeDisplayType is only a pointer type on window systems that define
one.  Mesa's surfaceless configuration, which is what is used on macOS,
typedefs it to int, so passing it to eglGetPlatformDisplayEXT() -- whose
second parameter is void * -- is an integer-to-pointer conversion.

clang 15 and later make -Wint-conversion an error rather than a warning, so
on macOS 26 with Apple clang this is a hard build failure:

    ui/egl-helpers.c:531:54: error: incompatible integer to pointer conversion
      passing 'EGLNativeDisplayType' (aka 'int') to parameter of type 'void *'

Casting via uintptr_t is correct whether the typedef is an integer or a
pointer, so no version or platform guard is needed.  Only reachable with the
+gl variant, which turns on opengl and virglrenderer.

See https://trac.macports.org/ticket/73902

--- ui/egl-helpers.c.orig
+++ ui/egl-helpers.c
@@ -528,7 +528,16 @@
     /* In practise any EGL 1.5 implementation would support the EXT extension */
     if (epoxy_has_egl_extension(NULL, "EGL_EXT_platform_base")) {
         if (platform != 0) {
-            dpy = eglGetPlatformDisplayEXT(platform, native, NULL);
+            /*
+             * eglGetPlatformDisplayEXT() takes a void *, while
+             * EGLNativeDisplayType is only pointer-typed on window systems
+             * that define one.  Mesa's surfaceless/macOS configuration
+             * typedefs it to int, so cast via uintptr_t, which is correct
+             * either way.  clang 15 and later make -Wint-conversion an
+             * error, so this is a hard build failure there.
+             */
+            dpy = eglGetPlatformDisplayEXT(platform,
+                                           (void *)(uintptr_t)native, NULL);
         }
     }