[macho] -rpath support

Summary:
Work on adding -rpath support to the mach-o linker.
This patch is based on the ld64 behavior for the command line option validation.

It includes a basic test to check that the LC_RPATH load commands are properly generated when that option is used.

It also add LC_RPATH support to the binary reader, but I don't know how to test it though.


Reviewers: kledzik

Subscribers: llvm-commits

Projects: #lld

Differential Revision: http://reviews.llvm.org/D6724

llvm-svn: 224544

1 files changed, 5 insertions, 0 deletions

diff --git a/lld/lib/ReaderWriter/MachO/MachONormalizedFileBinaryReader.cpp b/lld/lib/ReaderWriter/MachO/MachONormalizedFileBinaryReader.cpp
index 89c6213c845..ef8ad1d3325 100644
--- a/lld/lib/ReaderWriter/MachO/MachONormalizedFileBinaryReader.cpp
+++ b/lld/lib/ReaderWriter/MachO/MachONormalizedFileBinaryReader.cpp
@@ -460,6 +460,11 @@ readBinary(std::unique_ptr<MemoryBuffer> &mb,
       f->dependentDylibs.push_back(entry);
      }
       break;
+    case LC_RPATH: {
+      const rpath_command *rpc = reinterpret_cast<const rpath_command *>(lc);
+      f->rpaths.push_back(lc + read32(&rpc->path, isBig));
+     }
+      break;
     case LC_DYLD_INFO:
     case LC_DYLD_INFO_ONLY:
       dyldInfo = reinterpret_cast<const dyld_info_command*>(lc);