SDL: configure.ac: Explicitly disable Vulkan support on Solaris.

From b23343b7cd88f4c7eb50e014fde389cebc67e94e Mon Sep 17 00:00:00 2001
From: "Ryan C. Gordon" <[EMAIL REDACTED]>
Date: Thu, 27 Jun 2024 01:39:44 -0400
Subject: [PATCH] configure.ac: Explicitly disable Vulkan support on Solaris.

Fixes #10100.
---
 configure.ac | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/configure.ac b/configure.ac
index 46c17dc3b5bf3..0cd458f5985d8 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2743,6 +2743,10 @@ CheckVulkan()
                   #endif
                 ]],[])], [],[enable_video_vulkan=no])
                 ;;
+            *-*-solaris*)
+dnl             Strictly speaking, what's missing here is libxcb. Even without Vulkan support at the OS level, it should still compile if we had that.
+                enable_video_vulkan=no
+                ;;
             *-*-darwin*)
                 save_CFLAGS="$CFLAGS"
 dnl             Work around that we don't have Objective-C support in autoconf