From bdf5b1f97d3841107db1479ebf4cbf73257a6d5b Mon Sep 17 00:00:00 2001
From: Patrick McDermott <patrick.mcdermott@libiquity.com>
Date: Wed, 31 Jul 2019 02:17:44 -0400
Subject: Revert "build: Disable address sanitization by default"

This reverts commit 0c9789c85ca4542697fbfae82f1ed412ab2b2dbe.
---
diff --git a/configure.ac b/configure.ac
index bdbf6d9..8970211 100644
--- a/configure.ac
+++ b/configure.ac
@@ -70,7 +70,11 @@ AC_ARG_ENABLE([address-sanitization],
 			[bad value ${enableval} for address-sanitization option]
 			);;
 	esac],
-	[address_sanitization=no]
+	[
+		address_sanitization=no
+		gl_GCC_VERSION_IFELSE([4], [8],
+			[test -d "${srcdir}/.git" && address_sanitization=yes])
+	]
 )
 if test "x${address_sanitization}" = 'xyes'; then
 	AX_CHECK_COMPILE_FLAG([-fsanitize=address],
diff --git a/m4/gcc_version.m4 b/m4/gcc_version.m4
new file mode 100644
index 0000000..9e16450
--- /dev/null
+++ b/m4/gcc_version.m4
@@ -0,0 +1,38 @@
+dnl Copied from GNU Coreutils configure.ac
+dnl
+dnl The 17 lines are probably too trivial to be copyrightable, but just in case:
+dnl
+dnl Copyright (C) 1991-2017 Free Software Foundation, Inc.
+dnl
+dnl This program is free software: you can redistribute it and/or modify
+dnl it under the terms of the GNU General Public License as published by
+dnl the Free Software Foundation, either version 3 of the License, or
+dnl (at your option) any later version.
+dnl
+dnl This program is distributed in the hope that it will be useful,
+dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
+dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+dnl GNU General Public License for more details.
+dnl
+dnl You should have received a copy of the GNU General Public License
+dnl along with this program.  If not, see <https://www.gnu.org/licenses/>.
+dnl
+dnl Written by Jim Meyering.
+
+# gl_GCC_VERSION_IFELSE([major], [minor], [run-if-found], [run-if-not-found])
+# ------------------------------------------------
+# If $CPP is gcc-MAJOR.MINOR or newer, then run RUN-IF-FOUND.
+# Otherwise, run RUN-IF-NOT-FOUND.
+AC_DEFUN([gl_GCC_VERSION_IFELSE],
+  [AC_PREPROC_IFELSE(
+    [AC_LANG_PROGRAM(
+      [[
+#if ($1) < __GNUC__ || (($1) == __GNUC__ && ($2) <= __GNUC_MINOR__)
+/* ok */
+#else
+# error "your version of gcc is older than $1.$2"
+#endif
+      ]]),
+    ], [$3], [$4])
+  ]
+)
--
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