NeXT: Emit symbols used to manage linking of Obj-C classes.
 - This ensures that references to undefined classes cause link
   errors.
 - NOTE: This relies on platform specific asm directives currently,
   this should be factored out.

Also, don't emit a SYMBOLS metadata entry if there are no symbols.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@55302 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed