From 31e18bff069e0f5417932cf23bfb970ad2625630 Mon Sep 17 00:00:00 2001
From: Guillaume Maudoux <guillaume.maudoux@uclouvain.be>
Date: Wed, 21 Sep 2016 14:02:34 +0200
Subject: [PATCH] Add warning for builds within source tree

---
 CMakeLists.txt | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index af3b873c1..c286b6e07 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -71,6 +71,9 @@ endif()
 # CMake does not allow to add dependencies to "builtin" targets like package_source.
 # We therefore wrap package_source in our own dist target.
 
+if("${MOZART_BUILD_DIR}/" MATCHES "${MOZART_DIR}/.*")
+  message(WARNING "You are compiling inside the source tree. Generating source tarballs will not work correctly.")
+endif()
 add_custom_target(dist COMMAND ${CMAKE_MAKE_PROGRAM} package_source)
 configure_file(cmake_local/MozartConfigVersion.cmake.in
     ${CMAKE_CURRENT_BINARY_DIR}/cmake_local/MozartConfigVersion.cmake @ONLY)