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How to check the source code of stdarg?
- From: Parmenides <mobile dot parmenides at gmail dot com>
- To: Gcc mailing list <gcc-help at gcc dot gnu dot org>
- Date: Wed, 2 Nov 2011 21:37:36 +0800
- Subject: How to check the source code of stdarg?
Hi,
The gcc implements the stdarg.h to support variable parameters
functions. I wonder how it work. So, I find the stdarg.h at
/usr/lib/gcc/i486-pc-linux-gnu/4.1.2/include/stdarg.h
Open it , I found some definitions as follows:
#define va_start(v,l) __builtin_va_start(v,l)
#define va_end(v) __builtin_va_end(v)
#define va_arg(v,l) __builtin_va_arg(v,l)
Every macro has its __builtin_... version. I try to look for these
'__builtin_...' in gcc source code, but has not found. So, I want to
know how to check their source code.