CMakeLists.txt

cmake_minimum_required(VERSION 3.0)
project(PLAN)
set(PROJECT_NAME plan)

set(SOURCE_FILES  src/global.hpp src/global.cpp src/tree.hpp src/tree.cpp src/analyses.hpp src/analyses.cpp src/main.cpp)
add_executable(plan ${SOURCE_FILES})

############################################################
## Other users may add irregular header search paths here ##
############################################################

option(HYBRID "Using hybrid plan with MPI+OpenMP" OFF)
option(PARALLEL "Using parallel plan with MPI" OFF)
option(OPENMP "Using multithreading plan with OpenMP" OFF)

message("============================================================")
message("Run cmake without any option will build a serial program.")
message("The availabel build options are:")
message("    -DPARALLEL=ON   to enable MPI")
message("    -DOPENMP=ON     to enable OpenMP")
message("    -DHYBRID=ON     to enable MPI+OpenMP")
message("N.B.: the chosen option is cached after the first use.")
message("To switch, add -DOPTION=OFF to turn off the previous choice.")
message("eg. cmake -DHYBRID=OFF -DOPENMP=ON ../")
message("You can always delete cache files/folders for a fresh start.")
message("PS: clang/gcc built-in with macOS does not support OpenMP.")
message("============================================================")

if (HYBRID OR (PARALLEL AND OPENMP))
    message("============================================================")
    message("Now, generating Makefile for hybrid program (MPI+OpenMP)")
    message("============================================================")
    target_compile_options(${PROJECT_NAME} PUBLIC -std=c++11 -Wall -DHybrid -O3 -DNDEBUG)
    set(TURN_ON_MPI ON)
    set(TURN_ON_OpenMP ON)
elseif (PARALLEL)
    message("============================================================")
    message("Now, generating Makefile for parallel program (MPI)")
    message("============================================================")
    target_compile_options(${PROJECT_NAME} PUBLIC -std=c++11 -Wall -DMPI_ON -O3 -DNDEBUG)
    set(TURN_ON_MPI ON)
    set(TURN_ON_OpenMP OFF)
elseif (OPENMP)
    message("============================================================")
    message("Now, generating Makefile for multithreaded program (OpenMP)")
    message("============================================================")
    target_compile_options(${PROJECT_NAME} PUBLIC -std=c++11 -Wall -DOpenMP_ON -O3 -DNDEBUG)
    set(TURN_ON_MPI OFF)
    set(TURN_ON_OpenMP ON)
else ()
    message("============================================================")
    message("Now, generating Makefile for serial program...")
    message("============================================================")
    target_compile_options(${PROJECT_NAME} PUBLIC -std=c++11 -Wall -O3 -DNDEBUG)
    set(TURN_ON_MPI OFF)
    set(TURN_ON_OpenMP OFF)
endif ()

if (TURN_ON_MPI)
    find_package(MPI REQUIRED)
    target_include_directories(${PROJECT_NAME} PUBLIC ${MPI_C_INCLUDE_DIRS})
    target_link_libraries(plan PUBLIC ${MPI_C_LIBRARIES})
    set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${MPI_C_LINK_FLAGS} -DMPICH_SKIP_MPICXX -DOMPI_SKIP_MPICXX")
endif ()
if (TURN_ON_OpenMP)
    find_package(OpenMP REQUIRED)
    set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${OpenMP_CXX_FLAGS}")
endif ()
if (NOT APPLE)
    add_compile_options(-march=native)
endif ()

find_package(Boost REQUIRED)
target_include_directories(${PROJECT_NAME} PUBLIC ${Boost_INCLUDE_DIRS})

set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -O3")
set(CMAKE_CXX_STANDARD 11)
set(CMAKE_VERBOSE_MAKEFILE ON)

unset(HYBRID)
unset(OPENMP)
unset(PARALLEL)
unset(TURN_ON_MPI)
unset(TURN_ON_OpenMP)