[clang] 79dfa88 - [clang][modules-driver] Add missing PrependArg for Clang module precompile jobs (#191610)

[via cfe-commits]

Author: Naveen Seth Hanig
Date: 2026-04-11T10:28:30+02:00
New Revision: 79dfa887f1b5d3f3418dc8b5aad3c75e9aa1f1ad

URL: https://github.com/llvm/llvm-project/commit/79dfa887f1b5d3f3418dc8b5aad3c75e9aa1f1ad
DIFF: https://github.com/llvm/llvm-project/commit/79dfa887f1b5d3f3418dc8b5aad3c75e9aa1f1ad.diff

LOG: [clang][modules-driver] Add missing PrependArg for Clang module precompile jobs (#191610)

In `createClangModulePrecompileJob`, the `PrependArg` parameter was not
being passed for the newly created Clang module precompile job.
This causes failures for setups where the clang executable is a wrapper
(e.g., the llvm-driver wrapper).

See
https://github.com/llvm/llvm-project/pull/191258#issuecomment-4227294864

Added: 
    

Modified: 
    clang/lib/Driver/ModulesDriver.cpp

Removed: 
    


################################################################################
diff  --git a/clang/lib/Driver/ModulesDriver.cpp b/clang/lib/Driver/ModulesDriver.cpp
index 1a5fcb491c686..82865f903590f 100644
--- a/clang/lib/Driver/ModulesDriver.cpp
+++ b/clang/lib/Driver/ModulesDriver.cpp
@@ -1252,11 +1252,12 @@ createClangModulePrecompileJob(Compilation &C, const Command &ImportingJob,
   for (const auto &Arg : BuildArgs)
     JobArgs.push_back(TCArgs.MakeArgString(Arg));
 
-  return std::make_unique<Command>(*PA, ImportingJob.getCreator(),
-                                   ResponseFileSupport::AtFileUTF8(),
-                                   C.getDriver().getClangProgramPath(), JobArgs,
-                                   /*Inputs=*/ArrayRef<InputInfo>{},
-                                   /*Outputs=*/ArrayRef<InputInfo>{});
+  const auto &D = C.getDriver();
+  return std::make_unique<Command>(
+      *PA, ImportingJob.getCreator(), ResponseFileSupport::AtFileUTF8(),
+      D.getClangProgramPath(), JobArgs,
+      /*Inputs=*/ArrayRef<InputInfo>{},
+      /*Outputs=*/ArrayRef<InputInfo>{}, D.getPrependArg());
 }
 
 /// Creates a \c ClangModuleJobNode with associated job for each unique Clang