diff options
Diffstat (limited to 'clang/lib/Frontend/PrecompiledPreamble.cpp')
| -rw-r--r-- | clang/lib/Frontend/PrecompiledPreamble.cpp | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/clang/lib/Frontend/PrecompiledPreamble.cpp b/clang/lib/Frontend/PrecompiledPreamble.cpp index 23371d1f426..30ae2db26d8 100644 --- a/clang/lib/Frontend/PrecompiledPreamble.cpp +++ b/clang/lib/Frontend/PrecompiledPreamble.cpp @@ -63,6 +63,16 @@ createVFSOverlayForPreamblePCH(StringRef PCHFilename, return Overlay; } +class PreambleDependencyCollector : public DependencyCollector { +public: + // We want to collect all dependencies for correctness. Avoiding the real + // system dependencies (e.g. stl from /usr/lib) would probably be a good idea, + // but there is no way to distinguish between those and the ones that can be + // spuriously added by '-isystem' (e.g. to suppress warnings from those + // headers). + bool needSystemDependencies() override { return true; } +}; + /// Keeps a track of files to be deleted in destructor. class TemporaryFiles { public: @@ -311,7 +321,7 @@ llvm::ErrorOr<PrecompiledPreamble> PrecompiledPreamble::Build( Clang->setSourceManager( new SourceManager(Diagnostics, Clang->getFileManager())); - auto PreambleDepCollector = std::make_shared<DependencyCollector>(); + auto PreambleDepCollector = std::make_shared<PreambleDependencyCollector>(); Clang->addDependencyCollector(PreambleDepCollector); // Remap the main source file to the preamble buffer. |
