From 06ddf9d81bd4b20366e3faa885cd418e156e3fbd Mon Sep 17 00:00:00 2001
From: maier <maier@0785d39b-7218-0410-832d-ea1e28bc413d>
Date: Sat, 28 Sep 2013 22:09:04 +0000
Subject: [PATCH] Bugfix: Run related MPI tests sequentally to avoid a
 racecondition when creating the executable

git-svn-id: https://svn.dealii.org/branches/branch_port_the_testsuite@31007 0785d39b-7218-0410-832d-ea1e28bc413d
---
 tests/cmake/macros/macro_add_test.cmake | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/tests/cmake/macros/macro_add_test.cmake b/tests/cmake/macros/macro_add_test.cmake
index 1faea678c9..8f538d46e6 100644
--- a/tests/cmake/macros/macro_add_test.cmake
+++ b/tests/cmake/macros/macro_add_test.cmake
@@ -189,6 +189,25 @@ MACRO(DEAL_II_ADD_TEST _category _test_name _comparison_file _n_cpu)
         LABEL "${_category}"
         TIMEOUT ${TEST_TIME_LIMIT}
         )
+
+      #
+      # We have to be careful not to run different mpirun settings for the
+      # same executable in parallel because this triggers a race condition
+      # when compiling the not yet existent executable that is shared
+      # between the different tests.
+      #
+      # Luckily CMake has a mechanism to force a test to be run when
+      # another has finished (and both are scheduled):
+      #
+      IF(NOT "${_n_cpu}" STREQUAL "0")
+        IF(DEFINED TEST_DEPENDENCIES_${_target})
+          SET_TESTS_PROPERTIES(${_test_full} PROPERTIES
+            DEPENDS ${TEST_DEPENDENCIES_${_target}}
+            )
+        ENDIF()
+        SET(TEST_DEPENDENCIES_${_target} ${_test_full})
+      ENDIF()
+
     ENDIF()
   ENDFOREACH()
 ENDMACRO()
-- 
2.39.5