https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67301
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Try:
int main(int argc, char* argv[])
{
__asm__ __volatile__ (
"\t movl %[__ARGC], %%eax \n"
:
: [__ARGC] "r" (argc)
);
return 0;
}
Basically the syntax for naming operands is [XYZ] but since it is optional, [
is used to say it is optional part of the syntax. Yes it is slightly confusing
but that is what you get when you use [] as both part of the actual syntax and
saying it is an optional part.
