On Mon, Dec 30, 2002 at 01:39:30PM -0800, Roland McGrath wrote: > > > Please try > > > > extern int x; > > int _x __attribute__((section (".bss"))); > > asm(".symver _x,x@VERS_1"); > > int foo() { return x; } > > That produces an undefined reference to unversioned `x'. > If _x is undefined, as will generate a versioned reference to x. H.J.