1 files changed, 19 insertions, 1 deletions
diff --git a/llvm/tools/llvm-libtool-darwin/llvm-libtool-darwin.cpp b/llvm/tools/llvm-libtool-darwin/llvm-libtool-darwin.cpp
index 8d4529c..5fec847 100644
--- a/llvm/tools/llvm-libtool-darwin/llvm-libtool-darwin.cpp
+++ b/llvm/tools/llvm-libtool-darwin/llvm-libtool-darwin.cpp
@@ -10,6 +10,7 @@
 //
 //===----------------------------------------------------------------------===//
 
+#include "DependencyInfo.h"
 #include "llvm/BinaryFormat/Magic.h"
 #include "llvm/IR/LLVMContext.h"
 #include "llvm/Object/ArchiveWriter.h"
@@ -87,6 +88,12 @@ static cl::list<std::string> LibrarySearchDirs(
         " libraries"),
     cl::Prefix, cl::cat(LibtoolCategory));
 
+static cl::opt<std::string> DependencyInfoPath(
+    "dependency_info",
+    cl::desc("Write an Xcode dependency info file describing the dependencies "
+             "of the created library"),
+    cl::cat(LibtoolCategory));
+
 static cl::opt<bool>
     VersionOption("V", cl::desc("Print the version number and exit"),
                   cl::cat(LibtoolCategory));
@@ -109,6 +116,8 @@ static const std::array<std::string, 3> StandardSearchDirs{
     "/usr/local/lib",
 };
 
+std::unique_ptr<DependencyInfo> GlobalDependencyInfo;
+
 struct Config {
   bool Deterministic = true; // Updated by 'D' and 'U' modifiers.
   uint32_t ArchCPUType;
@@ -116,7 +125,6 @@ struct Config {
 };
 
 static Expected<std::string> searchForFile(const Twine &FileName) {
-
   auto FindLib =
       [FileName](ArrayRef<std::string> SearchDirs) -> Optional<std::string> {
     for (StringRef Dir : SearchDirs) {
@@ -125,6 +133,8 @@ static Expected<std::string> searchForFile(const Twine &FileName) {
 
       if (sys::fs::exists(Path))
         return std::string(Path);
+
+      GlobalDependencyInfo->addMissingInput(Path);
     }
     return None;
   };
@@ -652,6 +662,11 @@ static Expected<Config> parseCommandLine(int Argc, char **Argv) {
     return C;
   }
 
+  GlobalDependencyInfo =
+      DependencyInfoPath.empty()
+          ? std::make_unique<DummyDependencyInfo>()
+          : std::make_unique<DependencyInfo>(DependencyInfoPath);
+
   if (OutputFile.empty()) {
     std::string Error;
     raw_string_ostream Stream(Error);
@@ -686,6 +701,9 @@ static Expected<Config> parseCommandLine(int Argc, char **Argv) {
             MachO::getArchitectureFromName(ArchType));
   }
 
+  GlobalDependencyInfo->write("llvm-libtool-darwin " LLVM_VERSION_STRING,
+                              InputFiles, OutputFile);
+
   return C;
 }