vsnprintf: make more consistent with snprintf; doc fixes

[gnulib.git] / m4 / vsnprintf.m4

diff --git a/m4/vsnprintf.m4 b/m4/vsnprintf.m4
index ed189c2..17109a7 100644 (file)
--- a/m4/vsnprintf.m4
+++ b/m4/vsnprintf.m4
@@ -13,7 +13,12 @@ AC_DEFUN([gl_FUNC_VSNPRINTF],
     gl_SNPRINTF_SIZE1
     case "$gl_cv_func_snprintf_size1" in
       *yes)
-        gl_cv_func_vsnprintf_usable=yes
+        gl_SNPRINTF_RETVAL_C99
+        case "$gl_cv_func_snprintf_retval_c99" in
+          *yes)
+            gl_cv_func_vsnprintf_usable=yes
+            ;;
+        esac
         ;;
     esac
   fi