[Eug-lug] c and va_*

[Rob Hudson]

Hi EUGLUG,

I discovered elmo, not the cartoon character, but the mail client:
http://elmo.sourceforge.net/  I thought it might make a nice replacement to
mutt, which I've been using on my server for years.

I wanted to try it on my FreeBSD server but it dies on the linking stage
saying: 
/usr/local/src/elmo-1.2.0/src/str.c(.text+0x28d): undefined reference to `va_copy'

Do you know what va_copy does?  Is it part of C?

Here's the actual function in str.c:

int
str_vsprintf (str_t *str, const char *fmt, va_list ap)
{
        int     n; 
        int     max_size;
        va_list copy; 

        if (str == NULL || fmt == NULL)
                return -1;

        while (1){
                max_size = str->size - str->len - 1;
                va_copy (copy, ap);
                n = vsnprintf (str->str + str->len, max_size, fmt, copy);
                if (n > -1 && n < max_size){
                        str->len += n;
                        return n;
                }
                if (n > -1)
                        while (max_size < n + 1){
                                str->size *= 2;
                                max_size   = str->size - str->len;
                        }
                else {
                        str->size *= 2;
                }

                str->str = xrealloc (str->str, str->size + 1);
        }
}

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