Added ZMQ_BUILD_TESTS to CMakeLists.txt to allow turning off tests. Useful when…

Added ZMQ_BUILD_TESTS to CMakeLists.txt to allow turning off tests. Useful when building ZMQ as a git submodule.

CMakeLists.txt

@@ -580,81 +580,89 @@ if(NOT CMAKE_BUILD_TYPE STREQUAL "Debug") # Why?
   endforeach()
 endif()
 
-enable_testing()
-set(tests
-        test_system
-        test_pair_inproc
-        test_pair_tcp
-        test_reqrep_inproc
-        test_reqrep_tcp
-        test_hwm
-        test_reqrep_device
-        test_sub_forward
-        test_invalid_rep
-        test_msg_flags
-        test_connect_resolve
-        test_immediate
-        test_last_endpoint
-        test_term_endpoint
-        test_router_mandatory
-        test_probe_router
-        test_stream
-        test_stream_empty
-        test_stream_disconnect
-        test_disconnect_inproc
-        test_ctx_options
-        test_ctx_destroy
-        test_security_null
-        test_security_plain
-        test_security_curve
-        test_iov
-        test_spec_req
-        test_spec_rep
-        test_spec_dealer
-        test_spec_router
-        test_spec_pushpull
-        test_req_correlate
-        test_req_relaxed
-        test_conflate
-        test_inproc_connect
-        test_issue_566
-        test_shutdown_stress
-        test_timeo
-        test_many_sockets
-        test_diffserv
-        test_connect_rid
-)
-if(NOT WIN32)
-list(APPEND tests
-        test_monitor
-        test_pair_ipc
-        test_reqrep_ipc
-        test_fork
-        test_abstract_ipc
-        test_proxy
-        test_filter_ipc
-)
-endif()
+#-----------------------------------------------------------------------------
+# tests
+
+set(ZMQ_BUILD_TESTS ON CACHE BOOL "Build the tests for ZeroMQ")
+
+if(ZMQ_BUILD_TESTS)
+  enable_testing()
+  set(tests
+          test_system
+          test_pair_inproc
+          test_pair_tcp
+          test_reqrep_inproc
+          test_reqrep_tcp
+          test_hwm
+          test_reqrep_device
+          test_sub_forward
+          test_invalid_rep
+          test_msg_flags
+          test_connect_resolve
+          test_immediate
+          test_last_endpoint
+          test_term_endpoint
+          test_router_mandatory
+          test_probe_router
+          test_stream
+          test_stream_empty
+          test_stream_disconnect
+          test_disconnect_inproc
+          test_ctx_options
+          test_ctx_destroy
+          test_security_null
+          test_security_plain
+          test_security_curve
+          test_iov
+          test_spec_req
+          test_spec_rep
+          test_spec_dealer
+          test_spec_router
+          test_spec_pushpull
+          test_req_correlate
+          test_req_relaxed
+          test_conflate
+          test_inproc_connect
+          test_issue_566
+          test_shutdown_stress
+          test_timeo
+          test_many_sockets
+          test_diffserv
+          test_connect_rid
+  )
+  if(NOT WIN32)
+  list(APPEND tests
+          test_monitor
+          test_pair_ipc
+          test_reqrep_ipc
+          test_fork
+          test_abstract_ipc
+          test_proxy
+          test_filter_ipc
+  )
+  endif()
 
-foreach(test ${tests})
-  add_executable(${test} tests/${test}.cpp)
-  target_link_libraries(${test} libzmq)
+  foreach(test ${tests})
+    add_executable(${test} tests/${test}.cpp)
+    target_link_libraries(${test} libzmq)
 
-  if(RT_LIBRARY)
-    target_link_libraries(${test} ${RT_LIBRARY})
-  endif()
-  if(WIN32)
-    add_test(NAME ${test} WORKING_DIRECTORY ${LIBRARY_OUTPUT_PATH} COMMAND ${test})
-  else()
-    add_test(NAME ${test} COMMAND ${test})
-  endif()
-endforeach()
+    if(RT_LIBRARY)
+      target_link_libraries(${test} ${RT_LIBRARY})
+    endif()
+    if(WIN32)
+      add_test(NAME ${test} WORKING_DIRECTORY ${LIBRARY_OUTPUT_PATH} COMMAND ${test})
+    else()
+      add_test(NAME ${test} COMMAND ${test})
+    endif()
+  endforeach()
 
-if(NOT WIN32)
-  if(NOT CMAKE_SYSTEM_NAME MATCHES "Linux")
-    set_tests_properties(test_abstract_ipc PROPERTIES WILL_FAIL true)
+  if(NOT WIN32)
+    if(NOT CMAKE_SYSTEM_NAME MATCHES "Linux")
+      set_tests_properties(test_abstract_ipc PROPERTIES WILL_FAIL true)
+    endif()
   endif()
-endif()
+
+endif() # ZMQ_BUILD_TESTS
 
 #-----------------------------------------------------------------------------
 # installer