removing symbol from shared lib

[Erik Leunissen]

To answer my own question:

Yes it is possible with the minimal setup below. It just doesn't work in 
a more complicated real world case, which doesn't lend itself for public 
consumption (yet).

Erik Leunissen
==============

 > cat a.c
void
X ()
{
}
 > cat b.c
extern void X();
void
Y ()
{
X();
}
 > gcc -c a.c b.c
 > gcc -shared -nostdlib -o ab.so a.o b.o
 > nm ab.so
00001328 A __bss_start
000012a4 A _DYNAMIC
00001328 A _edata
00001328 A _end
0000131c A _GLOBAL_OFFSET_TABLE_
0000028c T X
00000294 T Y
 > objcopy -L X ab.so
 > nm ab.so
00001328 A __bss_start
000012a4 A _DYNAMIC
00001328 A _edata
00001328 A _end
0000131c A _GLOBAL_OFFSET_TABLE_
0000028c t X
00000294 T Y
 > objcopy -x ab.so
 > nm ab.so
00001328 A __bss_start
000012a4 A _DYNAMIC
00001328 A _edata
00001328 A _end
0000131c A _GLOBAL_OFFSET_TABLE_
00000294 T Y
 >