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74cfcd1c69
This fixes compiling with MSVC for aarch64 after
510999f6b0.
While MSVC does do dead code elimintation for function references
within e.g. "if (0)", it doesn't do that for functions referenced
within a static function, even if that static function itself ends
up not used.
A reproduction example:
void missing(void);
void (*func_ptr)(void);
static void wrapper(void) {
missing();
}
void init(int cpu_flags) {
if (0) {
func_ptr = wrapper;
}
}
If "wrapper" is entirely unreferenced, then MSVC doesn't produce
any reference to the symbol "missing". Also, if we do
"func_ptr = missing;" then the reference to missing also is
eliminated. But for the case of referencing the function in a
static function, even if the reference to the static function can
be eliminated, then MSVC does keep the reference to the symbol.