SDL: SDL_atomic.h: __ARM_ARCH is not always defined for an arm platform (2b0ca)

From 2b0ca871195be8e43e3eb664f750ddd8926eb7d3 Mon Sep 17 00:00:00 2001
From: Anonymous Maarten <[EMAIL REDACTED]>
Date: Sat, 22 Jul 2023 21:20:34 +0200
Subject: [PATCH] SDL_atomic.h: __ARM_ARCH is not always defined for an arm
 platform

e.g. riscos toolchain
(cherry picked from commit 8105f1d5b5b83328f4d0017a562674efca821077)
---
 include/SDL_atomic.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/SDL_atomic.h b/include/SDL_atomic.h
index 8273287f960d..1dd816a3826e 100644
--- a/include/SDL_atomic.h
+++ b/include/SDL_atomic.h
@@ -240,7 +240,7 @@ typedef void (*SDL_KernelMemoryBarrierFunc)();
 /* "REP NOP" is PAUSE, coded for tools that don't know it by that name. */
 #if (defined(__GNUC__) || defined(__clang__)) && (defined(__i386__) || defined(__x86_64__))
     #define SDL_CPUPauseInstruction() __asm__ __volatile__("pause\n")  /* Some assemblers can't do REP NOP, so go with PAUSE. */
-#elif (defined(__arm__) && __ARM_ARCH >= 7) || defined(__aarch64__)
+#elif (defined(__arm__) && defined(__ARM_ARCH) && __ARM_ARCH >= 7) || defined(__aarch64__)
     #define SDL_CPUPauseInstruction() __asm__ __volatile__("yield" ::: "memory")
 #elif (defined(__powerpc__) || defined(__powerpc64__))
     #define SDL_CPUPauseInstruction() __asm__ __volatile__("or 27,27,27");