From d228490162b2892a3f461b4ff1f1e1937de703c4 Mon Sep 17 00:00:00 2001
From: Nicolas Williams <nico@cryptonector.com>
Date: Sun, 17 Jan 2016 12:09:43 -0600
Subject: Add --enable-ubsan (undefined behavior sanitizer)

---
 Makefile.am  | 4 ++++
 configure.ac | 5 +++++
 2 files changed, 9 insertions(+)

diff --git a/Makefile.am b/Makefile.am
index 8a6ace42..2a3aded4 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -56,6 +56,10 @@ endif
 
 include_HEADERS = src/jv.h src/jq.h
 
+if ENABLE_UBSAN
+AM_CFLAGS += -fsanitize=undefined
+endif
+
 ### Running tests under Valgrind
 
 if ENABLE_ASAN
diff --git a/configure.ac b/configure.ac
index 03aa71d2..4f640822 100644
--- a/configure.ac
+++ b/configure.ac
@@ -95,6 +95,10 @@ dnl faster.
 AC_ARG_ENABLE([asan],
    AC_HELP_STRING([--enable-asan], [enable address sanitizer]))
 
+dnl Undefined Behavior Sanitizer
+AC_ARG_ENABLE([ubsan],
+   AC_HELP_STRING([--enable-ubsan], [enable undefined behavior sanitizer]))
+
 dnl Code coverage
 AC_ARG_ENABLE([gcov],
    AC_HELP_STRING([--enable-gcov], [enable gcov code coverage tool]))
@@ -137,6 +141,7 @@ EOF
 
 AM_CONDITIONAL([ENABLE_VALGRIND], [test "x$enable_valgrind" != xno])
 AM_CONDITIONAL([ENABLE_ASAN], [test "x$enable_asan" = xyes])
+AM_CONDITIONAL([ENABLE_UBSAN], [test "x$enable_ubsan" = xyes])
 AM_CONDITIONAL([ENABLE_GCOV], [test "x$enable_gcov" = xyes])
 AM_CONDITIONAL([ENABLE_DOCS], [test "x$enable_docs" != xno])
 AM_CONDITIONAL([ENABLE_ERROR_INJECTION], [test "x$enable_error_injection" = xyes])
-- 
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