cmake_minimum_required (VERSION 3.12) 

# To allow linking to static libs from other directories
cmake_policy(SET CMP0079 NEW)
set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${CMAKE_CURRENT_SOURCE_DIR}/lasp/cmake")
include("BuildType")


# This is used for code completion in vim
set(CMAKE_EXPORT_COMPILE_COMMANDS=ON)
project(LASP LANGUAGES C CXX)

# Whether we want to use blas yes or no
option(LASP_USE_BLAS "Use external blas library for math" ON)
option(LASP_ARM "Compile subset of code for ARM real time (Bela board)" OFF)
option(LASP_DOUBLE_PRECISION "Compile as double precision floating point" ON)
option(LASP_PARALLEL "Parallel processing" ON)
option(LASP_HAS_RTAUDIO "Compile with RtAudio Daq backend" ON)
option(LASP_HAS_ULDAQ "Compile with UlDaq backend" ON)
set(LASP_MAX_NUM_CHANNELS 16 CACHE STRING "Maximum number of audio channels that is compiled in in code")
set(LASP_MAX_NUM_THREADS 30 CACHE STRING "The maximum number of simultaneous threads in parallel processing")
set(LASP_TRACERNAME "defaulttracer" CACHE STRING "Name of tracer variable containing level")
set(LASP_FFT_BACKEND "FFTW" CACHE STRING "FFT Library backend")
set_property(CACHE LASP_FFT_BACKEND PROPERTY STRINGS "FFTW" "FFTPack" "None")

if(CMAKE_BUILD_TYPE STREQUAL Debug)
    set(LASP_DEBUG True)
else()
    set(LASP_DEBUG False)
endif()

if(LASP_PARALLEL)
    add_definitions(-D_REENTRANT)
    set(LASP_THREADING_LIBRARIES pthread)
else()
    set(LASP_THREADING_LIBRARIES "")
endif()

if(LASP_USE_BLAS)
    # link openblas
    set(BLA_VENDOR OpenBLAS)
    find_package(BLAS REQUIRED)
endif()


# Reasonable maximum to the nfft size, at 48kHz this is 700s of data...
add_definitions(-DLASP_MAX_NFFT=33554432) # 2**25

# ####################################### End of user-adjustable variables section
set(CMAKE_CXX_STANDARD 11)
set(CMAKE_C_STANDARD 11)

if(LASP_FFT_BACKEND STREQUAL "FFTW")
    find_library(FFTW_LIBRARY NAMES fftw3 fftw)
    set(FFT_LIBRARIES "${FFTW_LIBRARY}")
elseif(LASP_FFT_BACKEND STREQUAL "FFTPack")
    include_directories(fftpack)
    set(FFT_LIBRARIES fftpack)
    add_subdirectory(fftpack)
endif()

# General make flags
set(CMAKE_POSITION_INDEPENDENT_CODE ON)
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall -Wextra -Wno-type-limits \
-Werror=implicit-function-declaration -Wno-unused-parameter \
-Werror=return-type")

if(CMAKE_SYSTEM_NAME STREQUAL "Windows")
    set(win32 true)
    set(home $ENV{USERPROFILE})
    # set(miniconda_dir ${home}\\Miniconda3)

    message("Building for Windows")
    include_directories(
        ..\\rtaudio
        C:\\mingw\\mingw64\\include\\OpenBLAS
        link_directories(${home}\\miniconda3\\Library\\include)
        )
    set(CMAKE_MODULE_PATH "${CMAKE_MODULE_PATH} $miniconda_dir\\Lib\\cmake")
    # include(
    add_definitions(-DMS_WIN64)
    link_directories(C:\\mingw\\mingw64\\lib)
    link_directories(C:\\mingw\\mingw64\\bin)
    link_directories(..\\rtaudio)
    link_directories(${home}\\Miniconda3)
    add_definitions(-DHAS_RTAUDIO_WIN_WASAPI_API)
else() # Linux compile
    set(win32 false)
    set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -std=c11 -Werror=incompatible-pointer-types")
    set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fPIC")
    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fPIC")	
    include_directories(/usr/local/include/rtaudio)
    include_directories(/usr/include/rtaudio)
    link_directories(/usr/local/lib)

    # This should become optional later on, and be added to the windows list as
    # well.

endif()

set(CYTHON_FLAGS "--fast-fail")
if(LASP_DEBUG)
    set(LASP_DEBUG_CYTHON=True)
    message("Building debug code")
    # This will produce html files
    # set(CYTHON_ANNOTATE ON)
    # Add the __FILENAME__ macro
    # set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -D__FILENAME__='\"$(subst ${CMAKE_SOURCE_DIR}/,,$(abspath $<))\"'")
else()
    message("Building LASP for release")
    set(LASP_DEBUG_CYTHON=False)
    set(CYTHON_ANNOTATE OFF)
    set(CYTHON_NO_DOCSTRINGS ON)
    # Strip unnecessary symbols
    # set(CMAKE_SHARED_LINKER_FLAGS "-Wl,--gc-sections")
    # set(CMAKE_MODULE_LINKER_FLAGS "-Wl,--gc-sections")
endif(LASP_DEBUG)

# The last argument here takes care of calling SIGABRT when an integer overflow
# occures.
############################## General compilation flags (independent of debug mode, windows or linux)
set(CYTHON_EXTRA_C_FLAGS "-Wno-sign-compare -Wno-cpp -Wno-implicit-fallthrough -Wno-incompatible-pointer-types -Wno-strict-aliasing")
set(CYTHON_EXTRA_CXX_FLAGS "-Wno-sign-compare -Wno-cpp -Wno-implicit-fallthrough -Wno-strict-aliasing")


set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Wextra \
-Wno-type-limits")

# Debug make flags
set(CMAKE_C_FLAGS_DEBUG "-g" )

set(CMAKE_C_FLAGS_RELEASE  "-O2 -mfpmath=sse -march=x86-64 -mtune=native \
-fdata-sections -ffunction-sections -fomit-frame-pointer -finline-functions")

# ############################# End compilation flags



# Python searching.
set(Python_ADDITIONAL_VERSIONS "3.8")
set(python_version_windll "38")
find_package(PythonLibs REQUIRED )
find_package(PythonInterp REQUIRED)

# Add FFTpack dir if used as FFT backend
if(LASP_FFTPACK_BACKEND)
    add_subdirectory(fftpack)
    include_directories(
        fftpack
        )
endif()

include_directories(
    lasp/c
    )

add_subdirectory(lasp)
add_subdirectory(test)

# set(SETUP_PY_IN "${CMAKE_CURRENT_SOURCE_DIR}/setup.py.in")
set(SETUP_PY    "${CMAKE_CURRENT_BINARY_DIR}/setup.py")

set(DEPS  "${CMAKE_CURRENT_SOURCE_DIR}/*.py"
    "${CMAKE_CURRENT_SOURCE_DIR}/lasp/*.py"
    "wrappers"
    "lasp_daq")

set(OUTPUT      "${CMAKE_CURRENT_BINARY_DIR}/build/timestamp")

# configure_file(${SETUP_PY_IN} ${SETUP_PY})
add_custom_command(OUTPUT ${OUTPUT}
    COMMAND ${PYTHON_EXECUTABLE} ${SETUP_PY} build
    COMMAND ${CMAKE_COMMAND} -E touch ${OUTPUT}
    DEPENDS ${DEPS})

add_custom_target(target ALL DEPENDS ${OUTPUT})

if(DEFINED INSTALL_DEBUG)
    set(EXTRA_SETUP_ARG --user -e)
else()
    set(EXTRA_SETUP_ARG "")
endif()


install(CODE "execute_process(COMMAND ${PYTHON_EXECUTABLE} -m pip install ${EXTRA_SETUP_ARG} .)")