From 0a203b8720f2514569e46ad51755b43a38346113 Mon Sep 17 00:00:00 2001
From: Greg Hudson <ghudson@mit.edu>
Date: Thu, 30 Jun 2016 12:32:20 -0400
Subject: Add asan build support

Add the --enable-asan configure option.  This option suppresses the
undefined symbol check when building shared libraries on Linux, and
adds -fsanitize=address to the compiler and linker options.
---
 src/configure.in | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

(limited to 'src/configure.in')

diff --git a/src/configure.in b/src/configure.in
index 7ef0c62..433e9d1 100644
--- a/src/configure.in
+++ b/src/configure.in
@@ -399,6 +399,27 @@ if test "$enableval" = no ; then
 fi
 KRB5_RUN_FLAGS
 
+# asan is a gcc and clang facility to instrument the code with memory
+# error checking.  To use it, we compile C and C++ source files with
+# -fsanitize=address, and set ASAN=yes to suppress the undefined
+# symbols check when building shared libraries.
+AC_ARG_ENABLE([asan],
+AC_HELP_STRING([--enable-asan],[Build with asan memory checking]),[],
+               [enable_asan=no])
+if test "$enable_asan" != no; then
+    if test "$enable_asan" = yes; then
+        enable_asan=address
+    fi
+    ASAN_FLAGS="$DEFS -fsanitize=$enable_asan"
+    ASAN=yes
+    UNDEF_CHECK=
+else
+    ASAN_FLAGS=
+    ASAN=no
+fi
+AC_SUBST(ASAN_FLAGS)
+AC_SUBST(ASAN)
+
 AC_TYPE_SIGNAL
 
 # from old include/configure.in
-- 
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