On Tue, 17 Jul 2012 15:02:44 +0100, Jacob Carlborg <d...@me.com> wrote:
On 2012-07-17 14:32, Regan Heath wrote:After a bit of googling and a test with my local MSVC9 I think old-style variadics look like this: #include <varargs.h> #include <stdio.h> void foo(va_alist) va_dcl { va_list p; va_start(p); vprintf("%d %d %d\n", p); } void main() { foo(1, 2, 3); } (the above runs and outputs "1 2 3" on the console) The same syntax is/was supported by GNU C, see: http://ftp.gnu.org/old-gnu/Manuals/glibc-2.2.3/html_chapter/libc_34.html#SEC676 I believe, if you see an "old-style" function declaration in a header file like: int foo (); that you can't actually assume anything about it's parameters, it may have /any/ number of parameters, and may or may not be variadic.Clang seems to interpret it as a variadic function. Then if that is correct or not I don't know.
All my googling for "old style" "variadic" etc returned the use of va_alist and va_dcl so I can't see where/why Clang would do what it's doing.
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