SDL_image: cmake: define AOM_TARGET_CPU for powerpc and unknown ISA

SDL Commits
1 
From 929e4aacf94d6ef4304b6d38839748124f6a6616 Mon Sep 17 00:00:00 2001
From: Anonymous Maarten <[EMAIL REDACTED]>
Date: Sun, 5 Apr 2026 01:22:27 +0200
Subject: [PATCH] cmake: define AOM_TARGET_CPU for powerpc and unknown ISA

---
 CMakeLists.txt | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index ac14877b..5caa8206 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -528,6 +528,10 @@ if(SDLIMAGE_AOM)
           set(AOM_NEON_INTRIN_FLAG "-mfpu=neon" CACHE STRING "AOM CFLAGS for enabling neon intrinsics")
         elseif(SDL_CPU_ARM64)
           set(AOM_TARGET_CPU "aarch64")
+        elseif(SDL_CPU_POWERPC32 OR SDL_CPU_POWERPC64)
+          set(AOM_TARGET_CPU "ppc")
+        else()
+          set(AOM_TARGET_CPU "generic")
         endif()
         add_subdirectory(external/aom external/aom-build EXCLUDE_FROM_ALL)
         register_license(aom external/aom/LICENSE)