1 files changed, 10 insertions, 0 deletions

diff --git a/libbb/bb_asprintf.c b/libbb/bb_asprintf.c
index 8658a5408..191417a2d 100644
--- a/libbb/bb_asprintf.c
+++ b/libbb/bb_asprintf.c
@@ -13,9 +13,19 @@ char *bb_xasprintf(const char *format, ...)
         int r;
         char *string_ptr;
 
+#ifdef HAVE_GNU_EXTENSIONS
         va_start(p, format);
         r = vasprintf(&string_ptr, format, p);
         va_end(p);
+#else
+        va_start(p, format);
+        r = vsnprintf(NULL, 0, format, p);
+        va_end(p);
+        string_ptr = xmalloc(r+1);
+        va_start(p, format);
+        r = vsnprintf(string_ptr, r+1, format, p);
+        va_end(p);
+#endif
 
         if (r < 0) {
                 bb_perror_msg_and_die("bb_xasprintf");