From f7f3e3f6d7992d2ec33b831da704e7cf2748269c Mon Sep 17 00:00:00 2001
From: Harald Welte <laforge@gnumonks.org>
Date: Wed, 18 Apr 2018 23:51:28 +0200
Subject: [PATCH] configure.ac: Add --enable-sanitize and --enable-werror

this is "osmocom standard" these days, and is used by our CI scripts
---
 configure.ac | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)

diff --git a/configure.ac b/configure.ac
index b60ca81..5b94828 100644
--- a/configure.ac
+++ b/configure.ac
@@ -49,6 +49,33 @@ AC_CHECK_LIB(m, atan2, [LIBS="$LIBS -lm"])
 dnl librealtime (for rtl_test)
 AC_CHECK_LIB(rt, clock_gettime, [LIBS="$LIBS -lrt"])
 
+AC_ARG_ENABLE(sanitize,
+		[AS_HELP_STRING([--enable-sanitize], [Compile with address sanitizer enabled], )],
+		[sanitize=$enableval], [sanitize="no"])
+if test x"$sanitize" = x"yes"
+then
+	CFLAGS="$CFLAGS -fsanitize=address -fsanitize=undefined"
+	CPPFLAGS="$CPPFLAGS -fsanitize=address -fsanitize=undefined"
+fi
+
+AC_ARG_ENABLE(werror,
+	[AS_HELP_STRING(
+		[--enable-werror],
+		[Turn all compiler warnings into errors, with exceptions:
+		 a) deprecation (allow upstream to mark deprecation without breaking builds);
+		 b) "#warning" pragmas (allow to remind ourselves of errors without breaking builds)
+		]
+	)],
+	[werror=$enableval], [werror="no"])
+if test x"$werror" = x"yes"
+then
+	WERROR_FLAGS="-Werror"
+	WERROR_FLAGS+=" -Wno-error=deprecated -Wno-error=deprecated-declarations"
+	WERROR_FLAGS+=" -Wno-error=cpp" # "#warning"
+	CFLAGS="$CFLAGS $WERROR_FLAGS"
+	CPPFLAGS="$CPPFLAGS $WERROR_FLAGS"
+fi
+
 # The following test is taken from WebKit's webkit.m4
 saved_CFLAGS="$CFLAGS"
 CFLAGS="$CFLAGS -fvisibility=hidden "