From 8a3e12b75f244c8e2cd63939abce8ca11403d739 Mon Sep 17 00:00:00 2001
From: Felipe Magno de Almeida <felipe@expertisesolutions.com.br>
Date: Thu, 9 Jul 2015 02:02:56 -0300
Subject: [PATCH] autotools: Added --disable-unwind option

Added --disable-uniwnd option to allow user to disable automatically finding libunwind.

This helps with compilation with -m32 without libunwind.
---
 configure.ac | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/configure.ac b/configure.ac
index 01c7850290..f05064ab81 100644
--- a/configure.ac
+++ b/configure.ac
@@ -842,8 +842,16 @@ case "${build_profile}" in
      ;;
 esac
 
-PKG_CHECK_MODULES(UNWIND, [libunwind libunwind-generic],
-                  [have_unwind=yes], [have_unwind=no])
+want_unwind="yes"
+have_unwind="no"
+AC_ARG_ENABLE([unwind],
+   [AS_HELP_STRING([--disable-unwind],[Disable unwind library. @<:@default=enabled@:>@])],
+   [want_unwind="no"], [])
+
+if test x"${want_unwind}" = "xyes"; then
+   PKG_CHECK_MODULES(UNWIND, [libunwind libunwind-generic],
+                     [have_unwind=${want_unwind}], [have_unwind=no])
+fi
 AS_IF([test "x$have_unwind" = "xyes"],
       [AC_DEFINE([HAVE_UNWIND], [1], [Have libunwind])])
 AM_CONDITIONAL(HAVE_UNWIND, test "x$have_unwind" = "xyes")