Revert to BUILD_TESTING; make inc fix optionally transitive

Author: Matthew-Whitlock

CMakeLists.txt

@@ -15,57 +15,34 @@ project(Fenix C)
 set(FENIX_VERSION_MAJOR 1)
 set(FENIX_VERSION_MINOR 0)
 
-option(FENIX_EXAMPLES    "Builds example programs from the examples directory" OFF)
-option(FENIX_TESTS       "Builds tests and test modes of files"                OFF)
+option(BUILD_EXAMPLES    "Builds example programs from the examples directory" OFF)
+option(BUILD_TESTING     "Builds tests and test modes of files" ON)
+
 
 #Solves an issue with some system environments putting their MPI headers before
 #the headers CMake includes. Forces non-system MPI headers when incorrect headers
 #detected in include path.
-option(FENIX_SYSTEM_INC_FIX  "Attempts to force overriding any system MPI headers" ON)
-
+option(FENIX_SYSTEM_INC_FIX    "Attempts to force overriding any system MPI headers" ON)
+option(FENIX_PROPAGATE_INC_FIX "Attempt overriding system MPI headers in linking projects" ON)
 
 find_package(MPI REQUIRED)
 
-#If we're using mpicc, we don't need to worry about the includes.
-if("${CMAKE_C_COMPILER}" MATCHES ".*/?mpicc")
-  set(FENIX_SYSTEM_INC_FIX OFF)
-endif()
-
 if(${FENIX_SYSTEM_INC_FIX})
-  include(CheckIncludeFile)
-  set(CMAKE_REQUIRED_QUIET ON)
-  check_include_file("mpi.h" MPI_HEADER_CRASH)
-  set(CMAKE_REQUIRED_QUIET OFF)
-
-  if(${MPI_HEADER_CRASH})
-    message(WARNING "Detected system MPI headers, attempting to force use of ${MPI_C_INCLUDE_DIRS}. Set SYSTEM_INC_FIX=OFF to stop this behavior.")
-
-    if(${CMAKE_VERSION} VERSION_GREATER_EQUAL "3.25")
-      set_target_properties(MPI::MPI_C PROPERTIES SYSTEM "FALSE")
-    else()
-      foreach(MPI_DIR ${MPI_C_INCLUDE_DIRS})
-        if(NOT ("${CMAKE_C_FLAGS}" MATCHES ".* -I${MPI_DIR}.*"))
-          message(STATUS ${MPI_DIR})
-          set(CMAKE_C_FLAGS " -I${MPI_DIR} ${CMAKE_C_FLAGS}" CACHE INTERNAL "Flags to append to build commands for C.")
-        endif()
-      endforeach()
-      set_target_properties(MPI::MPI_C PROPERTIES INTERFACE_INCLUDE_DIRECTORIES "")
-    endif()
-  endif()
-
-endif() #SYSTEM_INC_FIX
+  include(cmake/systemMPIOverride.cmake)
+endif()
 
 
 add_subdirectory(src)
 
+
 include(CTest)
 list(APPEND MPIEXEC_PREFLAGS "--with-ft;mpi")
 
-if(FENIX_EXAMPLES)
+if(BUILD_EXAMPLES)
     add_subdirectory(examples)
 endif()
 
-if(FENIX_TESTS)
+if(BUILD_TESTING)
     add_subdirectory(test)
 endif()
 
@@ -75,17 +52,22 @@ configure_file(
     ${CMAKE_CURRENT_SOURCE_DIR}/include/fenix-config.h.in
     ${CMAKE_CURRENT_BINARY_DIR}/include/fenix-config.h @ONLY
 )
+configure_file(
+    ${CMAKE_CURRENT_SOURCE_DIR}/cmake/systemMPIOverride.cmake
+    ${CMAKE_CURRENT_BINARY_DIR}/cmake/systemMPIOverride.cmake COPYONLY
+)
+
 
 include(CMakePackageConfigHelpers)
-configure_package_config_file(fenixConfig.cmake.in
-                              ${CMAKE_CURRENT_BINARY_DIR}/fenixConfig.cmake
+configure_package_config_file(cmake/fenixConfig.cmake.in
+                              ${CMAKE_CURRENT_BINARY_DIR}/cmake/fenixConfig.cmake
                               INSTALL_DESTINATION cmake)
-write_basic_package_version_file(${CMAKE_CURRENT_BINARY_DIR}/fenixConfigVersion.cmake
+write_basic_package_version_file(${CMAKE_CURRENT_BINARY_DIR}/cmake/fenixConfigVersion.cmake
                                  VERSION "${FENIX_VERSION_MAJOR}.${FENIX_VERSION_MINOR}"
                                  COMPATIBILITY SameMajorVersion)
 install(
     FILES
-    ${CMAKE_CURRENT_BINARY_DIR}/fenixConfig.cmake
-    ${CMAKE_CURRENT_BINARY_DIR}/fenixConfigVersion.cmake
+    ${CMAKE_CURRENT_BINARY_DIR}/cmake/fenixConfig.cmake
+    ${CMAKE_CURRENT_BINARY_DIR}/cmake/systemMPIOverride.cmake
     DESTINATION cmake
 )

cmake/fenixConfig.cmake.in

@@ -0,0 +1,13 @@
+@PACKAGE_INIT@
+
+include(CMakeFindDependencyMacro)
+
+include("${CMAKE_CURRENT_LIST_DIR}/fenixTargets.cmake")
+
+set(FENIX_SYSTEM_INC_FIX @FENIX_SYSTEM_INC_FIX@)
+if(${FENIX_SYSTEM_INC_FIX})
+  option(FENIX_PROPAGATE_INC_FIX "Attempt overriding system MPI headers in linking projects" @FENIX_PROPAGATE_INC_FIX@)
+  if(${FENIX_PROPAGATE_INC_FIX})
+    include("${CMAKE_CURRENT_LIST_DIR}/systemMPIOverride.cmake")
+  endif()
+endif()

cmake/systemMPIOverride.cmake

@@ -0,0 +1,51 @@
+#If we're using mpicc, we don't need to worry about the includes.
+if("${CMAKE_C_COMPILER}" MATCHES ".*/?mpic")
+    return()
+endif()
+
+include(CheckIncludeFile)
+set(CMAKE_REQUIRED_QUIET ON)
+check_include_file("mpi.h" MPI_HEADER_CLASH)
+set(CMAKE_REQUIRED_QUIET OFF)
+
+if(${MPI_HEADER_CLASH})
+  if(TARGET fenix)
+    message(WARNING "Fenix detected system MPI headers, attempting to force use of ${MPI_C_INCLUDE_DIRS}. Disable FENIX_PROPAGATE_INC_FIX to stop this behavior.")
+  else()
+    message(WARNING "Detected system MPI headers, attempting to force use of ${MPI_C_INCLUDE_DIRS}. Disable FENIX_SYSTEM_INC_FIX to stop this behavior.")
+  endif()
+
+  if(${CMAKE_VERSION} VERSION_GREATER_EQUAL "3.25")
+
+    if(TARGET MPI::MPI_C)
+      set_target_properties(MPI::MPI_C PROPERTIES SYSTEM "FALSE")
+    endif()
+    if(TARGET MPI::MPI_CXX)
+      set_target_properties(MPI::MPI_CXX PROPERTIES SYSTEM "FALSE")
+    endif()
+
+  else()
+
+    if(TARGET MPI::MPI_C)
+      set_property(DIRECTORY ${CMAKE_SOURCE_DIR} APPEND PROPERTY INCLUDE_DIRECTORIES "${MPI_C_INCLUDE_DIRS}")
+    endif()
+    if(TARGET MPI::MPI_CXX)
+      set_property(DIRECTORY ${CMAKE_SOURCE_DIR} APPEND PROPERTY INCLUDE_DIRECTORIES "${MPI_CXX_INCLUDE_DIRS}")
+    endif()
+
+    if(TARGET fenix)
+      get_target_property(FENIX_INCLUDES fenix INTERFACE_INCLUDE_DIRECTORIES)
+      list(REMOVE_ITEM FENIX_INCLUDES ${MPI_C_INCLUDE_DIRS})
+      list(REMOVE_ITEM FENIX_INCLUDES ${MPI_CXX_INCLUDE_DIRS})
+      set_target_properties(fenix PROPERTIES INTERFACE_INCLUDE_DIRECTORIES "${FENIX_INCLUDES}")
+    endif()
+    
+    if(TARGET MPI::MPI_C)
+      set_target_properties(MPI::MPI_C PROPERTIES INTERFACE_INCLUDE_DIRECTORIES "")
+    endif()
+    if(TARGET MPI::MPI_CXX)
+      set_target_properties(MPI::MPI_CXX PROPERTIES INTERFACE_INCLUDE_DIRECTORIES "")
+    endif()
+
+  endif()
+endif()

examples/01_hello_world/fenix/CMakeLists.txt

@@ -11,7 +11,7 @@
 add_executable(fenix_hello_world fenix_hello_world.c)
 target_link_libraries(fenix_hello_world fenix ${MPI_C_LIBRARIES})
 
-if(FENIX_TESTS)
+if(BUILD_TESTING)
    add_test(NAME hello_world 
       COMMAND ${MPIEXEC_EXECUTABLE} ${MPIEXEC_NUMPROC_FLAG} 3 ${MPIEXEC_PREFLAGS} fenix_hello_world ${MPIEXEC_POSTFLAGS} "1")
 endif()

examples/02_send_recv/fenix/CMakeLists.txt

@@ -11,7 +11,7 @@
 add_executable(fenix_ring fenix_ring.c)
 target_link_libraries(fenix_ring fenix ${MPI_C_LIBRARIES} m )
 
-if(FENIX_TESTS)
+if(BUILD_TESTING)
    add_test(NAME ring 
       COMMAND ${MPIEXEC_EXECUTABLE} ${MPIEXEC_NUMPROC_FLAG} 5 ${MPIEXEC_PREFLAGS} fenix_ring ${MPIEXEC_POSTFLAGS} 1 2)
    set_tests_properties(ring PROPERTIES

examples/05_subset_create/CMakeLists.txt

@@ -11,7 +11,7 @@
 add_executable(subset_create subset_create.c)
 target_link_libraries(subset_create fenix ${MPI_C_LIBRARIES})
 
-if(FENIX_TESTS) 
+if(BUILD_TESTING) 
    add_test(NAME subset_create 
       COMMAND ${MPIEXEC_EXECUTABLE} ${MPIEXEC_NUMPROC_FLAG} 5 ${MPIEXEC_PREFLAGS} subset_create ${MPIEXEC_POSTFLAGS} 1)
    set_tests_properties(subset_create PROPERTIES

examples/06_subset_createv/CMakeLists.txt

@@ -11,7 +11,7 @@
 add_executable(subset_createv subset_createv.c)
 target_link_libraries(subset_createv fenix ${MPI_C_LIBRARIES})
 
-if(FENIX_TESTS) 
+if(BUILD_TESTING) 
    add_test(NAME subset_createv 
       COMMAND ${MPIEXEC_EXECUTABLE} ${MPIEXEC_NUMPROC_FLAG} 5 ${MPIEXEC_PREFLAGS} subset_createv ${MPIEXEC_POSTFLAGS} 1)
    set_tests_properties(subset_createv PROPERTIES

fenixConfig.cmake.in

@@ -33,7 +33,7 @@ globals.c
 
 add_library( fenix STATIC ${Fenix_SOURCES})
 
-target_link_libraries(fenix MPI::MPI_C)
+target_link_libraries(fenix PUBLIC MPI::MPI_C)
 
 target_include_directories(fenix 
     PUBLIC