build,win: fix VS2022 arm64 PGO build

Refs: #62761
Signed-off-by: StefanStojanovic <stefan.stojanovic@janeasystems.com>
PR-URL: #63413
Reviewed-By: Vinícius Lourenço Claro Cardoso <contact@viniciusl.com.br>

Author: StefanStojanovic

configure.py

@@ -1959,18 +1959,29 @@ def configure_node(o):
 msvc_dir=target_arch# 'x64' or 'arm64'
 
 vc_tools_dir=os.environ.get('VCToolsInstallDir', '')
-ifvc_tools_dir:
-clang_profile_lib=os.path.join(vc_tools_dir, 'lib', msvc_dir, lib_name)
-ifos.path.isfile(clang_profile_lib):
-o['variables']['clang_profile_lib'] =clang_profile_lib
-else:
-raiseException(
-f'PGO profile runtime library not found at {clang_profile_lib}. '
-'Ensure the ClangCL toolset is installed.')
-else:
+ifnotvc_tools_dir:
 raiseException(
 'VCToolsInstallDir not set. Run from a Visual Studio command prompt.')
 
+# Primary location: VS2026 and VS2022 x64
+candidates= [os.path.join(vc_tools_dir, 'lib', msvc_dir, lib_name)]
+
+# Secondary location: VS2022 arm64 fallback
+clang_major=options.clang_cl.split('.', 1)[0]
+candidates.append(os.path.normpath(os.path.join(
+vc_tools_dir, '..', '..', 'Llvm', msvc_dir,
+'lib', 'clang', clang_major, 'lib', 'windows', lib_name)))
+
+clang_profile_lib=next(
+ (pforpincandidatesifos.path.isfile(p)), None)
+ifclang_profile_lib:
+o['variables']['clang_profile_lib'] =clang_profile_lib
+else:
+raiseException(
+f'PGO profile runtime library {lib_name} not found. Searched:\n '+
+'\n '.join(candidates) +
+'\nEnsure the ClangCL toolset is installed.')
+
 ifflavor!='win'andoptions.enable_thin_lto:
 raiseException(
 'Use --enable-lto instead.')