This is a hack. Do not apply in on PowerPC systems, it is not needed there.
See comments in: https://gitlab.kitware.com/cmake/cmake/-/merge_requests/10616

--- Source/CPack/cmCPackDragNDropGenerator.cxx
+++ Source/CPack/cmCPackDragNDropGenerator.cxx	2025-04-09 05:30:02.000000000 +0800
@@ -29,7 +29,7 @@
 #include "cmValue.h"
 #include "cmXMLWriter.h"
 
-#if HAVE_CoreServices
+#if HAVE_CoreServices && defined(__clang__)
 // For the old LocaleStringToLangAndRegionCodes() function, to convert
 // to the old Script Manager RegionCode values needed for the 'LPic' data
 // structure used for generating multi-lingual SLAs.
@@ -609,7 +609,7 @@
                            kCFStringEncodingMacRoman);
         LangCode lang = 0;
         RegionCode region = 0;
-#if HAVE_CoreServices
+#if HAVE_CoreServices && defined(__clang__)
         OSStatus err =
           LocaleStringToLangAndRegionCodes(iso_language_cstr, &lang, &region);
         if (err != noErr)
@@ -620,7 +620,7 @@
                           << iso_language_cstr << std::endl);
           return 0;
         }
-#if HAVE_CoreServices
+#if HAVE_CoreServices && defined(__clang__)
         header_data.push_back(region);
         header_data.push_back(i);
         header_data.push_back(0);

--- Source/cmGlobalXCodeGenerator.cxx
+++ Source/cmGlobalXCodeGenerator.cxx	2025-04-09 05:32:50.000000000 +0800
@@ -61,7 +61,7 @@
 #  include <CoreFoundation/CFString.h>
 #  include <CoreFoundation/CFURL.h>
 #  include <CoreFoundation/CFUUID.h>
-#  if !TARGET_OS_IPHONE
+#  if !TARGET_OS_IPHONE && defined(__clang__)
 #    define HAVE_APPLICATION_SERVICES
 #    include <ApplicationServices/ApplicationServices.h>
 #  endif