From d704af657ca8ea10400fdb60424ef57c42719245 Mon Sep 17 00:00:00 2001
From: Marc Stern <marc.stern@approach-cyber.com>
Date: Thu, 8 Aug 2024 16:16:14 +0200
Subject: [PATCH] Define _FORTIFY_SOURCE=3 & _GLIBCXX_ASSERTIONS that add
 glibc/libstdc++ assertions. See
 https://www.gnu.org/software/libc/manual/html_node/Source-Fortification.html
 & https://gcc.gnu.org/wiki/LibstdcxxDebugMode

_GLIBCXX_ASSERTIONS is probably useless as we have pure C here, but let's define it in case some checks are included (or will be in a future version).
As we handle some requests here, that may help to trap a problem.
---
 configure.ac | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/configure.ac b/configure.ac
index c75335c1..69228a6b 100644
--- a/configure.ac
+++ b/configure.ac
@@ -309,10 +309,10 @@ fi
 
 AC_ARG_ENABLE(assertions,
               AS_HELP_STRING([--enable-assertions],
-                             [Turn on assertions checks (undefine NDEBUG)]),
+                             [Turn on assertions checks (undefine NDEBUG, define _GLIBCXX_ASSERTIONS  & _FORTIFY_SOURCE)]),
 [
   if test "${enableval}" = "yes"; then
-      assertions='-UNDEBUG'
+      assertions='-UNDEBUG -D_FORTIFY_SOURCE=3 -D_GLIBCXX_ASSERTIONS'
   else
       assertions='-DNDEBUG'
   fi