cmake_minimum_required(VERSION 3.11)
project(class)
set(CMAKE_POSITION_INDEPENDENT_CODE ON)

# Options
option(ENABLE_TESTS "compile test executables" OFF)

# OpenMP
find_package(OpenMP)

# Sources
file( GLOB TOOLS_SRC
  ${PROJECT_SOURCE_DIR}/tools/*.c
)
file( GLOB SOURCE_SRC
  ${PROJECT_SOURCE_DIR}/source/*.c
)

set(CPP_SRC 
    ${PROJECT_SOURCE_DIR}/tools/arrays.c
    ${PROJECT_SOURCE_DIR}/tools/hyperspherical.c
    ${PROJECT_SOURCE_DIR}/source/perturbations.c
    ${PROJECT_SOURCE_DIR}/source/primordial.c
    ${PROJECT_SOURCE_DIR}/source/transfer.c
    ${PROJECT_SOURCE_DIR}/source/harmonic.c
    ${PROJECT_SOURCE_DIR}/source/lensing.c
)

set(TESTS
    test_loops
    test_loops_omp
    test_spectra
    test_transfer
    test_nonlinear
    test_perturbations
    test_thermodynamics
    test_background
    test_hyperspherical
)

file( GLOB EXTERNAL_SRC
    ${PROJECT_SOURCE_DIR}/external/RecfastCLASS/*.c
    ${PROJECT_SOURCE_DIR}/external/HyRec2020/*.c
    ${PROJECT_SOURCE_DIR}/external/heating/*.c
)
set(EXTERNAL_INCLUDE 
    ${PROJECT_SOURCE_DIR}/external/RecfastCLASS/ 
    ${PROJECT_SOURCE_DIR}/external/HyRec2020/
    ${PROJECT_SOURCE_DIR}/external/heating/
)

SET_SOURCE_FILES_PROPERTIES(${CPP_SRC} PROPERTIES LANGUAGE CXX )

## Main library

find_package(Threads REQUIRED)
if(THREADS_HAVE_PTHREAD_ARG)
    target_compile_options(libclass PUBLIC "-pthread")
endif()

if(CMAKE_THREAD_LIBS_INIT)
    target_link_libraries(libclass "${CMAKE_THREAD_LIBS_INIT}")
endif()

add_library(libclass STATIC ${TOOLS_SRC} ${SOURCE_SRC} ${EXTERNAL_SRC} )
add_library(class::libclass ALIAS libclass)

target_compile_options(libclass PRIVATE -Wno-write-strings -fpermissive -O3 -g)
set_property(TARGET libclass PROPERTY POSITION_INDEPENDENT_CODE ON)

target_compile_definitions(libclass PUBLIC "__CLASSDIR__=\"${CMAKE_CURRENT_SOURCE_DIR}\"")
target_include_directories(libclass PUBLIC include ${EXTERNAL_INCLUDE})
target_link_libraries(libclass PRIVATE m)
if(OpenMP_FOUND)
    target_link_libraries(libclass PRIVATE OpenMP::OpenMP_C)
endif()

if(ENABLE_HYREC)
    target_compile_definitions(libclass PUBLIC "HYREC")
    target_include_directories(libclass PUBLIC ${CMAKE_CURRENT_LIST_DIR}/external/HyRec2020)
    target_include_directories(libclass PUBLIC ${CMAKE_CURRENT_LIST_DIR}/external/RecFastCLASS)
    target_include_directories(libclass PUBLIC ${CMAKE_CURRENT_LIST_DIR}/external/heating)
endif()