cmake_minimum_required(VERSION 3.20.0 FATAL_ERROR)

project(Thorin)

set(PACKAGE_VERSION "0.3.9")
#set(CMAKE_CONFIGURATION_TYPES "Debug;Release" CACHE STRING "limited config" FORCE)
set(CMAKE_WINDOWS_EXPORT_ALL_SYMBOLS 1)
set(CMAKE_CXX_STANDARD 17)
set(CMAKE_CXX_STANDARD_REQUIRED ON)

option(BUILD_SHARED_LIBS "Build shared libraries" ON)
option(THORIN_PROFILE "profile complexity in thorin::HashTable - only works in Debug build" ON)

if(CMAKE_BUILD_TYPE STREQUAL "")
    set(CMAKE_BUILD_TYPE Debug CACHE STRING "Debug or Release" FORCE)
endif()

set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib)
set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib)
set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/bin)

list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake/modules")

# check for Half library
find_package(Half REQUIRED)
message(STATUS "Building with Half library from ${Half_INCLUDE_DIRS}.")

# find json package for json output support.
if(TARGET nlohmann_json)
    set(THORIN_ENABLE_JSON TRUE)
else()
    find_package(nlohmann_json 3.2.0 QUIET)
    if(nlohmann_json_FOUND)
        set(THORIN_ENABLE_JSON TRUE)
    endif()
endif()

# check for possible llvm extension
find_package(LLVM QUIET CONFIG)
if(LLVM_FOUND)
    message(STATUS "Found LLVM ${LLVM_PACKAGE_VERSION}")
    message(STATUS "Using LLVMConfig.cmake in: ${LLVM_DIR}")
    if(LLVM_LINK_LLVM_DYLIB)
        set(AnyDSL_LLVM_LINK_SHARED "USE_SHARED")
    else()
        if (BUILD_SHARED_LIBS)
            message(SEND_ERROR "Cannot build thorin as a shared library with the current build of LLVM. Build LLVM with LLVM_LINK_LLVM_DYLIB or change BUILD_SHARED_LIBS to off.")
        endif()
    endif()
    # check for RV
    find_package(RV QUIET CONFIG)
    if(RV_FOUND)
        message(STATUS "Building with RV from LLVM installation.")
    else()
        message(STATUS "Building without RV. Install RV as part of LLVM.")
    endif()
else()
    message(STATUS "Building without LLVM and RV. Specify LLVM_DIR to compile with LLVM.")
endif()

include(CheckIncludeFile)
check_include_file(sys/resource.h THORIN_ENABLE_RLIMITS)

if (NOT TARGET shady)
    find_package(shady CONFIG)
    if (shady_FOUND)
        message(STATUS "Found shady at ${shady_DIR}")
        set(THORIN_ENABLE_SHADY TRUE)
    endif()
else()
    export(TARGETS shady api FILE ${CMAKE_BINARY_DIR}/share/anydsl/cmake/shady-exports.cmake)
    set(THORIN_ENABLE_SHADY TRUE)
endif()

find_package(SPIRV-Headers)
if (SPIRV-Headers_FOUND)
    message(STATUS "Found SPIRV-Headers at ${SPIRV-Headers_DIR}")
    set(THORIN_ENABLE_SPIRV TRUE)
endif()

message(STATUS "Using Debug flags: ${CMAKE_CXX_FLAGS_DEBUG}")
message(STATUS "Using Release flags: ${CMAKE_CXX_FLAGS_RELEASE}")
if(DEFINED CMAKE_BUILD_TYPE)
    message(STATUS "Build type: ${CMAKE_BUILD_TYPE}")
endif()

set(Thorin_ROOT_DIR ${CMAKE_CURRENT_SOURCE_DIR})

# configure thorin preprocessor definitions
if(CMAKE_BUILD_TYPE STREQUAL "Debug")
    set(THORIN_ENABLE_CHECKS TRUE)
endif()
if(THORIN_PROFILE)
    set(THORIN_ENABLE_PROFILING TRUE)
endif()
if(LLVM_FOUND)
    set(THORIN_ENABLE_LLVM TRUE)
endif()
if(RV_FOUND)
    set(THORIN_ENABLE_RV TRUE)
endif()
configure_file(src/thorin/config.h.in ${CMAKE_BINARY_DIR}/include/thorin/config.h @ONLY)

add_subdirectory(src)

export(TARGETS thorin FILE ${CMAKE_BINARY_DIR}/share/anydsl/cmake/thorin-exports.cmake)
configure_file(cmake/thorin-config.cmake.in ${CMAKE_BINARY_DIR}/share/anydsl/cmake/thorin-config.cmake @ONLY)