build,win: enable pch for clang-cl

StefanStojanovic · marco-ippolito · commit dc552c6739a5 · 2025-01-24T22:17:25.000+01:00
Fixes: #55208 PR-URL: #55249 Reviewed-By: Yagiz Nizipli <yagiz@nizipli.com>
diff --git a/tools/gyp/pylib/gyp/generator/msvs.py b/tools/gyp/pylib/gyp/generator/msvs.py
@@ -3416,7 +3416,11 @@ def _FinalizeMSBuildSettings(spec, configuration):
     )
     # Turn on precompiled headers if appropriate.
     if precompiled_header:
-        precompiled_header = os.path.split(precompiled_header)[1]
+        # While MSVC works with just file name eg. "v8_pch.h", ClangCL requires
+        # the full path eg. "tools/msvs/pch/v8_pch.h" to find the file.
+        # P.S. Only ClangCL defines msbuild_toolset, for MSVC it is None.
+        if configuration.get("msbuild_toolset") != 'ClangCL':
+            precompiled_header = os.path.split(precompiled_header)[1]
         _ToolAppend(msbuild_settings, "ClCompile", "PrecompiledHeader", "Use")
         _ToolAppend(
             msbuild_settings, "ClCompile", "PrecompiledHeaderFile", precompiled_header
