set a default value for CMAKE_RUNTIME_OUTPUT_DIRECTORY

Author: mirouse

proton-c/src/tests/CMakeLists.txt

@@ -28,6 +28,10 @@ if (ENABLE_VALGRIND AND VALGRIND_EXE)
     --suppressions=${CMAKE_CURRENT_SOURCE_DIR}/valgrind.supp)
 endif ()
 
+if (NOT CMAKE_RUNTIME_OUTPUT_DIRECTORY)
+  set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR})
+endif (NOT CMAKE_RUNTIME_OUTPUT_DIRECTORY)
+
 macro (pn_add_c_test test)
   add_executable (${test} ${ARGN})
   target_link_libraries (${test} qpid-proton ${PLATFORM_LIBS})