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[ClangScanDeps] Do not emit warning for P1689 format #186966

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Merged
ChuanqiXu9 merged 1 commit into from
Mar 24, 2026
Merged

[ClangScanDeps] Do not emit warning for P1689 format #186966

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2 changes: 2 additions & 0 deletions clang/lib/DependencyScanning/DependencyScannerImpl.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -412,6 +412,8 @@ void dependencies::initializeScanCompilerInstance(
ScanInstance.setBuildingModule(false);
ScanInstance.createVirtualFileSystem(FS, DiagConsumer);
ScanInstance.createDiagnostics(DiagConsumer, /*ShouldOwnClient=*/false);
if (Service.getOpts().Format == ScanningOutputFormat::P1689)
ScanInstance.getDiagnostics().setIgnoreAllWarnings(true);
ScanInstance.createFileManager();
ScanInstance.createSourceManager();

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23 changes: 23 additions & 0 deletions clang/test/ClangScanDeps/p1689-suppress-warnings.cppm
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Original file line number Diff line number Diff line change
@@ -0,0 +1,23 @@
// Test that P1689 format suppresses warnings during dependency scanning.
// This addresses https://github.com/llvm/llvm-project/issues/185394

// RUN: rm -rf %t
// RUN: mkdir -p %t
// RUN: split-file %s %t

// Test P1689 format - should NOT emit warnings
// RUN: clang-scan-deps -format=p1689 -- %clang++ -std=c++20 -I%t -c %t/mylib.cppm -o %t/mylib.o 2>&1 | FileCheck %s

// CHECK-NOT: warning:
// CHECK: {
// CHECK: "revision"

//--- header.h
// Empty header for testing

//--- mylib.cppm
module;

export module mylib;

#include <header.h>