[Mingw-users] va_arg long double

[Richard G. <rg...@ne...>]

I have been writing a function that takes a variable number of arguments 
using va_arg.  I have found that it does not seem to function correctly 
with long double types.  I know that printf() does not work with long 
double types because it uses the msvcrt library implementation, but does 
the va_arg functions suffer from the same problem?  If it does is this 
because MinGW uses the msvcrt library for va_arg as well?  Here is my test 
code:

#include <stdio.h>
#include <stdarg.h>

void test(int a,...)
{
	long double b;
	va_list argptr;

	va_start(argptr,a);
	b = va_arg(argptr,long double);

	//b = 50.1234;
	printf("a = %d\nb = %f",a,(double)b); //cast to double beacuse of 
limitations with printf() and long doube types

	va_end(argptr);
}

int main()
{
	test(1,50.1234);
	return 0;
}

outputs:
a = 1
b = -1.#IND00

Richard.