# Copyright (C) 2019 Intel Corporation.  All rights reserved.
# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception

cmake_minimum_required(VERSION 3.14)

project(unit-test)

# Yes. To solve the compatibility issue with CMAKE (>= 4.0), we need to update
# our `cmake_minimum_required()` to 3.5. However, there are CMakeLists.txt
# from 3rd parties that we should not alter. Therefore, in addition to
# changing the `cmake_minimum_required()`, we should also add a configuration
# here that is compatible with earlier versions.
set(CMAKE_POLICY_VERSION_MINIMUM 3.5)

SET(CMAKE_BUILD_TYPE Debug)

set(CMAKE_CXX_STANDARD 17)

#TODO: modularization me
# Detect Hosting target info
string(TOLOWER ${CMAKE_HOST_SYSTEM_NAME} WAMR_BUILD_PLATFORM)
# Set WAMR_BUILD_TARGET, currently values supported:
# "X86_64", "AMD_64", "X86_32", "AARCH64[sub]", "ARM[sub]", "THUMB[sub]",
# "MIPS", "XTENSA", "RISCV64[sub]", "RISCV32[sub]"
if (NOT DEFINED WAMR_BUILD_TARGET)
  if (CMAKE_SYSTEM_PROCESSOR MATCHES "^(arm64|aarch64)")
    set (WAMR_BUILD_TARGET "AARCH64")
  elseif (CMAKE_SYSTEM_PROCESSOR STREQUAL "riscv64")
    set (WAMR_BUILD_TARGET "RISCV64")
  elseif (CMAKE_SIZEOF_VOID_P EQUAL 8)
    # Build as X86_64 by default in 64-bit platform
    set (WAMR_BUILD_TARGET "X86_64")
  elseif (CMAKE_SIZEOF_VOID_P EQUAL 4)
    # Build as X86_32 by default in 32-bit platform
    set (WAMR_BUILD_TARGET "X86_32")
  else ()
    message(SEND_ERROR "Unsupported build target platform!")
  endif ()
endif ()

set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS}")
set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS}")

if(WAMR_BUILD_TARGET STREQUAL "X86_32")
  # 1) Force -m32
  set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -m32" CACHE STRING "" FORCE)
  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -m32" CACHE STRING "" FORCE)
  set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -m32" CACHE STRING "" FORCE)
  set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -m32" CACHE STRING "" FORCE)

  # 2) Make CMake prefer i386 libraries
  set(CMAKE_SYSTEM_PROCESSOR i386 CACHE STRING "" FORCE)
  set(CMAKE_LIBRARY_ARCHITECTURE "i386-linux-gnu" CACHE STRING "" FORCE)
endif()

# Fetch Google test
include (FetchContent)
if(${CMAKE_VERSION} VERSION_GREATER_EQUAL "3.24")
  FetchContent_Declare (
    googletest
    URL https://github.com/google/googletest/archive/03597a01ee50ed33e9dfd640b249b4be3799d395.zip
    DOWNLOAD_EXTRACT_TIMESTAMP ON
  )
else()
  FetchContent_Declare (
    googletest
    URL https://github.com/google/googletest/archive/03597a01ee50ed33e9dfd640b249b4be3799d395.zip
  )
endif()

# Prevent overriding the parent project's compiler/linker
# settings on Windows
set(gtest_force_shared_crt ON CACHE BOOL "" FORCE)
FetchContent_MakeAvailable(googletest)

include(GoogleTest)
enable_testing()

if(DEFINED UNITTEST_FOLDER AND NOT "${UNITTEST_FOLDER}" STREQUAL "")
  add_subdirectory("${UNITTEST_FOLDER}")
  return()
endif()