Introduce llvm-install-name-tool

This diff adds a new "driver" for llvm-objcopy
which is supposed to emulate the behavior of install-name-tool.
This is a recommit of b5913e6d2 with ubsan issues fixed.

Differential revision: https://reviews.llvm.org/D69146

Test plan: make check-all

1 files changed, 9 insertions, 3 deletions

diff --git a/llvm/tools/llvm-objcopy/CopyConfig.h b/llvm/tools/llvm-objcopy/CopyConfig.h
index 55a55d3..c262934 100644
--- a/llvm/tools/llvm-objcopy/CopyConfig.h
+++ b/llvm/tools/llvm-objcopy/CopyConfig.h
@@ -150,9 +150,9 @@ struct CopyConfig {
 
   // Main input/output options
   StringRef InputFilename;
-  FileFormat InputFormat;
+  FileFormat InputFormat = FileFormat::Unspecified;
   StringRef OutputFilename;
-  FileFormat OutputFormat;
+  FileFormat OutputFormat = FileFormat::Unspecified;
 
   // Only applicable when --output-format!=binary (e.g. elf64-x86-64).
   Optional<MachineInfo> OutputArch;
@@ -175,6 +175,7 @@ struct CopyConfig {
   std::vector<StringRef> AddSection;
   std::vector<StringRef> DumpSection;
   std::vector<StringRef> SymbolsToAdd;
+  std::vector<StringRef> RPathToAdd;
 
   // Section matchers
   NameMatcher KeepSection;
@@ -251,6 +252,12 @@ Expected<DriverConfig>
 parseObjcopyOptions(ArrayRef<const char *> ArgsArr,
                     llvm::function_ref<Error(Error)> ErrorCallback);
 
+// ParseInstallNameToolOptions returns the config and sets the input arguments.
+// If a help flag is set then ParseInstallNameToolOptions will print the help
+// messege and exit.
+Expected<DriverConfig>
+parseInstallNameToolOptions(ArrayRef<const char *> ArgsArr);
+
 // ParseStripOptions returns the config and sets the input arguments. If a
 // help flag is set then ParseStripOptions will print the help messege and
 // exit. ErrorCallback is used to handle recoverable errors. An Error returned
@@ -258,7 +265,6 @@ parseObjcopyOptions(ArrayRef<const char *> ArgsArr,
 Expected<DriverConfig>
 parseStripOptions(ArrayRef<const char *> ArgsArr,
                   llvm::function_ref<Error(Error)> ErrorCallback);
-
 } // namespace objcopy
 } // namespace llvm