From 83e0b5af7b6d501f23738540b8bf6d07950ce3a8 Mon Sep 17 00:00:00 2001
From: Matthias Maier <tamiko@43-1.org>
Date: Wed, 25 Apr 2018 13:14:49 -0500
Subject: [PATCH] CMake: add a safeguard

---
 cmake/configure/configure_adolc.cmake | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/cmake/configure/configure_adolc.cmake b/cmake/configure/configure_adolc.cmake
index 17bb4d4e96..51bb5670c3 100644
--- a/cmake/configure/configure_adolc.cmake
+++ b/cmake/configure/configure_adolc.cmake
@@ -17,6 +17,15 @@
 # Configuration for the ADOL-C library:
 #
 
+IF(NOT FEATURE_BOOST_PROCESSED)
+  MESSAGE(FATAL_ERROR "\n"
+    "Internal build system error: The configuration of "
+    "DEAL_II_WITH_ADOLC depends on "
+    "DEAL_II_WITH_BOOST, but CONFIGURE_FEATURE(ADOLC) "
+    "was called before CONFIGURE_FEATURE(BOOST).\n\n"
+    )
+ENDIF()
+
 MACRO(FEATURE_ADOLC_FIND_EXTERNAL var)
   FIND_PACKAGE(ADOLC)
 
-- 
2.39.5