portability: warn if provided snprintf.c is used

We don't have any visibility of changes to fix bugs in the snprintf
which is supplied with secnet.  Therefore at the very least we should
print a warning if we turn out to use it, rather than perhaps silently
using an ancient and perhaps-buggy implementation.

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>

diff --git a/snprintf.c b/snprintf.c
index 86f42e90df54b1165b053334b36c766a982c5407..c9ab8fc8339b9047f6353f55011056ccf9fdba7d 100644 (file)
--- a/snprintf.c
+++ b/snprintf.c
@@ -279,6 +279,8 @@
  */
 
 
+#warning Platform has no snprintf?! Please check included snprintf.c for sanity!
+
 \f
 /* ============================================= */
 /* NO USER SERVICABLE PARTS FOLLOWING THIS POINT */