From 504209ce714c2fff97b700c064a9f32ba38435f2 Mon Sep 17 00:00:00 2001
From: Moritz Bunkus <moritz@bunkus.org>
Date: Sat, 15 Jul 2017 16:59:58 +0200
Subject: [PATCH] configure: options for enabling address/undefined behavior
 sanitizers

The `Rakefile` has supported both for a while now, but the values had
to be set manually in `build-config`.
---
 ac/debugging_profiling.m4 | 22 ++++++++++++++++++++++
 build-config.in           |  4 ++++
 2 files changed, 26 insertions(+)

diff --git a/ac/debugging_profiling.m4 b/ac/debugging_profiling.m4
index ab1ca4bca..7d56b329e 100644
--- a/ac/debugging_profiling.m4
+++ b/ac/debugging_profiling.m4
@@ -59,7 +59,29 @@ else
   opt_features_no="$opt_features_no\n   * profiling support"
 fi
 
+AC_ARG_ENABLE([addrsan],
+  AC_HELP_STRING([--enable-addrsan],[compile with address sanitization turned on (no)]),
+  [ADDRSAN=yes],[ADDRSAN=no])
+
+if test x"$ADDRSAN" = xyes ; then
+  opt_features_yes="$opt_features_yes\n   * development technique 'address sanitizer'"
+else
+  opt_features_no="$opt_features_no\n   * development technique 'address sanitizer'"
+fi
+
+AC_ARG_ENABLE([ubsan],
+  AC_HELP_STRING([--enable-ubsan],[compile with sanitization for undefined behavior turned on (no)]),
+  [UBSAN=yes],[UBSAN=no])
+
+if test x"$UBSAN" = xyes ; then
+  opt_features_yes="$opt_features_yes\n   * development technique 'undefined behavior sanitizer'"
+else
+  opt_features_no="$opt_features_no\n   * development technique 'undefined behavior sanitizer'"
+fi
+
 AC_SUBST(DEBUG_CFLAGS)
 AC_SUBST(PROFILING_CFLAGS)
 AC_SUBST(PROFILING_LIBS)
 AC_SUBST(OPTIMIZATION_CFLAGS)
+AC_SUBST(ADDRSAN)
+AC_SUBST(UBSAN)
diff --git a/build-config.in b/build-config.in
index 801968b1a..d52318d66 100644
--- a/build-config.in
+++ b/build-config.in
@@ -138,3 +138,7 @@ BUILD_TOOLS = @BUILD_TOOLS@
 
 TRANSLATIONS = @TRANSLATIONS@
 MANPAGES_TRANSLATIONS = @MANPAGES_TRANSLATIONS@
+
+# Debugging aids: compiler sanitization features
+ADDRSAN = @ADDRSAN@
+UBSAN = @UBSAN@