compat: fall back on __va_copy if available

diff --git a/merge-recursive.c b/merge-recursive.c
index 16c2dbeab95a0f4099e3de8badf688bb4dee8189..2a4f739365e6ec72372b32ddb486aee6b21f4c22 100644 (file)
--- a/merge-recursive.c
+++ b/merge-recursive.c
@@ -137,7 +137,6 @@ static void flush_output(struct merge_options *o)
 __attribute__((format (printf, 3, 4)))
 static void output(struct merge_options *o, int v, const char *fmt, ...)
 {
-       int len;
        va_list ap;
 
        if (!show(o, v))
@@ -148,21 +147,9 @@ static void output(struct merge_options *o, int v, const char *fmt, ...)
        strbuf_setlen(&o->obuf, o->obuf.len + o->call_depth * 2);
 
        va_start(ap, fmt);
-       len = vsnprintf(o->obuf.buf + o->obuf.len, strbuf_avail(&o->obuf), fmt, ap);
+       strbuf_vaddf(&o->obuf, fmt, ap);
        va_end(ap);
 
-       if (len < 0)
-               len = 0;
-       if (len >= strbuf_avail(&o->obuf)) {
-               strbuf_grow(&o->obuf, len + 2);
-               va_start(ap, fmt);
-               len = vsnprintf(o->obuf.buf + o->obuf.len, strbuf_avail(&o->obuf), fmt, ap);
-               va_end(ap);
-               if (len >= strbuf_avail(&o->obuf)) {
-                       die("this should not happen, your snprintf is broken");
-               }
-       }
-       strbuf_setlen(&o->obuf, o->obuf.len + len);
        strbuf_add(&o->obuf, "\n", 1);
        if (!o->buffer_output)
                flush_output(o);