When final_scan_insn() emit a jump-table it always puts it in the 
readonly_data_section (unless JUMP_TABLES_IN_TEXT_SECTION).  If the current 
function is located in a linkonce section this generates a reference from a 
non-linkonce section to a local label of a linkonce section, and current 
binutils complain if the linkonce section is discarded. 
 
$ cat inline.h 
inline int foo (int x) 
{ 
  switch (x) 
    { 
    default: 
      return -1; 
    case 1: 
      return 0; 
    case 2: 
      return 1; 
    case 4: 
      return 2; 
    case 8: 
      return 3; 
    case 16: 
      return 4; 
    case 32: 
      return 5; 
    case 64: 
      return 6; 
    } 
} 
$ cat inline1.cc 
#include "inline.h" 
int (*x1) (int) = foo; 
$ cat inline2.cc 
#include "inline.h" 
int (*x2) (int) = foo; 
$ gcc -fPIC -shared inline1.cc inline2.cc 
`.gnu.linkonce.t._Z3fooi' referenced in section `.rodata' of /tmp/ccvGwdXw.o: 
defined in discarded section `.gnu.linkonce.t._Z3fooi' of /tmp/ccvGwdXw.o 
collect2: ld returned 1 exit status