where is the definition of "_builtin_va_list"

[Ian Lance Taylor]

yzysea <yangjing47686@163.com> writes:

> But I am wondering how a customary  C parser rather than gcc to identify
> "__builtin_va_list".

I don't really understand your question.

Some header files, including <stdarg.h>, are provided by gcc.  They
use gcc internal constructs.  If you want to read those header files
with a different C compiler, then you need to be prepared to read gcc
internal constructs.  It doesn't make sense to prevent gcc from
assuming that only gcc will read the header files distributed with
gcc.

Ian