From 4d7d40bce03be013c68ce1dcb07856ce63ae1b97 Mon Sep 17 00:00:00 2001
From: Gunnar Beutner <gunnar.beutner@netways.de>
Date: Wed, 26 Sep 2012 10:29:55 +0200
Subject: [PATCH] Unset ax_lib when we're done (as this would cause the next
 AC_BOOST_* call to fail).

---
 m4/ax_boost_signals.m4             | 1 +
 m4/ax_boost_system.m4              | 1 +
 m4/ax_boost_thread.m4              | 1 +
 m4/ax_boost_unit_test_framework.m4 | 1 +
 4 files changed, 4 insertions(+)

diff --git a/m4/ax_boost_signals.m4 b/m4/ax_boost_signals.m4
index 219bc6d5d..a522eb827 100644
--- a/m4/ax_boost_signals.m4
+++ b/m4/ax_boost_signals.m4
@@ -107,6 +107,7 @@ AC_DEFUN([AX_BOOST_SIGNALS],
 				AC_MSG_ERROR(Could not link against $ax_lib !)
 			fi
 		fi
+        ax_lib=""
 
 		CPPFLAGS="$CPPFLAGS_SAVED"
 	LDFLAGS="$LDFLAGS_SAVED"
diff --git a/m4/ax_boost_system.m4 b/m4/ax_boost_system.m4
index af2a8d2d0..ab7724b66 100644
--- a/m4/ax_boost_system.m4
+++ b/m4/ax_boost_system.m4
@@ -112,6 +112,7 @@ AC_DEFUN([AX_BOOST_SYSTEM],
 			if test "x$link_system" = "xno"; then
 				AC_MSG_ERROR(Could not link against $ax_lib !)
 			fi
+            ax_lib=""
 		fi
 
 		CPPFLAGS="$CPPFLAGS_SAVED"
diff --git a/m4/ax_boost_thread.m4 b/m4/ax_boost_thread.m4
index 9c46f817c..23923184c 100644
--- a/m4/ax_boost_thread.m4
+++ b/m4/ax_boost_thread.m4
@@ -142,6 +142,7 @@ AC_DEFUN([AX_BOOST_THREAD],
 
 			fi
 		fi
+        ax_lib=""
 
 		CPPFLAGS="$CPPFLAGS_SAVED"
 	LDFLAGS="$LDFLAGS_SAVED"
diff --git a/m4/ax_boost_unit_test_framework.m4 b/m4/ax_boost_unit_test_framework.m4
index b62d8a331..11e1b9db0 100644
--- a/m4/ax_boost_unit_test_framework.m4
+++ b/m4/ax_boost_unit_test_framework.m4
@@ -104,6 +104,7 @@ AC_DEFUN([AX_BOOST_UNIT_TEST_FRAMEWORK],
 				AC_MSG_ERROR(Could not link against $ax_lib !)
 			fi
 		fi
+        ax_lib=""
 
 		CPPFLAGS="$CPPFLAGS_SAVED"
 	LDFLAGS="$LDFLAGS_SAVED"