[CMake] Restrict libxar linkage to just llvm-objdump

At some point we're going to need libObject to have this dependency, but as it is now this is causing too many headaches. This commit will reduce the linkage to just llvm-objdump where it is strictly needed, and we'll cross the libObject bridge later when we need it.

llvm-svn: 270866

lib/Object/CMakeLists.txt

@@ -21,6 +21,4 @@ add_llvm_library(LLVMObject
 
   DEPENDS
   intrinsics_gen
-
-  LINK_LIBS ${XAR_LIB}
   )

lib/Support/CMakeLists.txt

@@ -24,9 +24,6 @@ elseif( CMAKE_HOST_UNIX )
   if( UNIX AND NOT (BEOS OR HAIKU) )
     set(system_libs ${system_libs} m)
   endif()
-  if(HAVE_LIBXAR)
-    list(APPEND system_libs ${XAR_LIB})
-  endif()
 endif( MSVC OR MINGW )
 
 add_llvm_library(LLVMSupport

tools/llvm-objdump/CMakeLists.txt

@@ -17,3 +17,7 @@ add_llvm_tool(llvm-objdump
   ELFDump.cpp
   MachODump.cpp
   )
+
+if(HAVE_LIBXAR)
+  target_link_libraries(llvm-objdump ${XAR_LIB})
+endif()