>>>>> "Keith" == Keith Owens <kaos@ocs.com.au> writes:

 Keith> #define my_symbol my_symbol_versioned extern void
 Keith> my_symbol(void);

 Keith> void foo(void) { __asm__("call %0" : : "i" (my_symbol)); }

 Keith> # gcc -o x x.c /tmp/cclWXduj.s: Assembler messages:
 Keith> /tmp/cclWXduj.s:12: Error: suffix or operands invalid for
 Keith> `call'

Try ye' olde STRINGIFY and string concatenation?  Well, at least I try...

     #define my_symbol my_symbol_versioned
     #define STRINGIFY(a) STRINGIFY1(a)
     #define STRINGIFY1(a) #a
     extern void my_symbol(void);

     void foo(void)
     {
         __asm__("call " STRINGIFY(my_symbol) "\n");
     }

     [bpringle@localhost bpringle]$ gcc -o x x.c
     /usr/lib/crt1.o(.text+0x18): undefined reference to `main'
     /tmp/ccIj9Cit.o: In function `foo':
     /tmp/ccIj9Cit.o(.text+0x4): undefined reference to `my_symbol_versioned'
     collect2: ld returned 1 exit status

regards,
Bill Pringlemeir.

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