From 763441bbd1b0515b7f5e7c30d01f533b7af8b8db Mon Sep 17 00:00:00 2001
From: Sergey Fedorov <barracuda@macos-powerpc.org>
Date: Fri, 26 Sep 2025 13:50:15 +0800
Subject: [PATCH] CMakeLists: fix for powerpc

---
 CMakeLists.txt          | 5 ++++-
 cmake/archdetect.cmake  | 3 +++
 cmake/osdetection.cmake | 4 ++++
 3 files changed, 11 insertions(+), 1 deletion(-)

diff --git CMakeLists.txt CMakeLists.txt
index 577f90e2..4faa0a24 100644
--- CMakeLists.txt
+++ CMakeLists.txt
@@ -129,7 +129,7 @@ include (${CMAKE_MODULE_PATH}/platform.cmake)
 # Detect OS and if Fat Runtime is available
 include (${CMAKE_MODULE_PATH}/osdetection.cmake)
 
-if(ARCH_X86_64 AND BUILD_SSE2_SIMDE AND NOT FAT_RUNTIME)
+if((ARCH_X86_64 AND BUILD_SSE2_SIMDE AND NOT FAT_RUNTIME) OR ARCH_PPC)
     set(SIMDE_BACKEND True)
 endif()
 
@@ -147,6 +147,9 @@ endif ()
 
 if (ARCH_PPC64EL)
     set(ARCH_FLAG mcpu)
+elseif (ARCH_PPC)
+    # Avoid mcpu, it can produce broken code on 32-bit ppc.
+    set(ARCH_FLAG mtune)
 else ()
     set(ARCH_FLAG march)
 endif ()
diff --git cmake/archdetect.cmake cmake/archdetect.cmake
index 5585f468..dddfaadb 100644
--- cmake/archdetect.cmake
+++ cmake/archdetect.cmake
@@ -93,6 +93,9 @@ else()
         elseif(ARCH_PPC64EL)
             set(GNUCC_ARCH power8)
             set(TUNE_FLAG power8)
+        elseif(ARCH_PPC)
+            set(GNUCC_ARCH G5)
+            set(TUNE_FLAG G5)
         else()
             set(GNUCC_ARCH x86-64-v2)
             set(TUNE_FLAG generic)
diff --git cmake/osdetection.cmake cmake/osdetection.cmake
index 96083baf..a74ff124 100644
--- cmake/osdetection.cmake
+++ cmake/osdetection.cmake
@@ -52,3 +52,7 @@ if (FAT_RUNTIME)
         message(FATAL_ERROR "Fat runtime is only built on Release builds")
     endif()
 endif ()
+
+if(MACOSX AND CMAKE_SYSTEM_PROCESSOR MATCHES "ppc|power")
+    set(ARCH_PPC TRUE)
+endif()
-- 
2.51.0