Work around FreeBSD rtld rpath $ORIGIN limitation

FreeBSD's rtld requires the DF_ORIGIN flag set in order to process
$ORIGIN in rpath.

FreeBSD bug http://bugs.freebsd.org/187114

llvm-svn: 203419

llvm/CMakeLists.txt

@@ -445,6 +445,9 @@ if (APPLE)
 else(UNIX)
   if(NOT DEFINED CMAKE_INSTALL_RPATH)
     set(CMAKE_INSTALL_RPATH "\$ORIGIN/../lib")
+    if (${CMAKE_SYSTEM_NAME} MATCHES FreeBSD)
+      set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -Wl,-z,origin")
+    endif()
   endif(NOT DEFINED CMAKE_INSTALL_RPATH)
 endif()