threadx/CMakeLists.txt

cmake_minimum_required(VERSION 3.13 FATAL_ERROR)

# Declare the project with C only first so that CMake loads the toolchain file,
# which sets THREADX_ARCH and THREADX_TOOLCHAIN as normal variables.  Checking
# those variables before project() would always fail because the toolchain is
# not sourced until the first project() call.
project(threadx LANGUAGES C)

if(NOT DEFINED THREADX_ARCH)
    message(FATAL_ERROR "Error: THREADX_ARCH not defined")
endif()
if(NOT DEFINED THREADX_TOOLCHAIN)
    message(FATAL_ERROR "Error: THREADX_TOOLCHAIN not defined")
endif()

# The Windows simulation ports do not use assembly.  All other ports require
# it.  enable_language() is called here rather than in project() above so that
# the ASM toolchain is only activated when we know the target actually needs it.
# Note: CMAKE_TRY_COMPILE_TARGET_TYPE is already set to STATIC_LIBRARY by
# every toolchain file in cmake/, so it does not need to be repeated here.
if(NOT ((THREADX_ARCH STREQUAL "win32") OR (THREADX_ARCH STREQUAL "win64")))
    enable_language(ASM)
endif()

option(THREADX_SMP "Build ThreadX SMP version" OFF)

# Enable testing at the top level so that tests registered by ports and
# example builds further down the tree are discoverable with ctest from the
# build root.  Without this, add_test() in a subdirectory still generates a
# CTestTestfile.cmake there, but the root does not reference it and
# "ctest --test-dir <build>" reports no tests at all.
enable_testing()

if(THREADX_SMP)
    set(TX_PORT_DIR "ports_smp")
    set(TX_COMMON_DIR "common_smp")
    set(TX_ARCH_DIR "${THREADX_ARCH}_smp")
    # Most SMP ports are named <arch>_smp, but ports_smp/linux and
    # ports_smp/win64 predate that convention and carry no suffix. Fall back to
    # the bare name for them. The check only fires when the suffixed directory
    # is absent, so no port that already resolves changes.
    if(NOT IS_DIRECTORY "${CMAKE_CURRENT_LIST_DIR}/${TX_PORT_DIR}/${TX_ARCH_DIR}")
        set(TX_ARCH_DIR "${THREADX_ARCH}")
    endif()
    message(STATUS "Building ThreadX SMP version")
else()
    set(TX_PORT_DIR "ports")
    set(TX_COMMON_DIR "common")
    set(TX_ARCH_DIR "${THREADX_ARCH}")
    message(STATUS "Building standard ThreadX version")
endif()

message(STATUS "THREADX_ARCH: ${THREADX_ARCH}")
message(STATUS "THREADX_TOOLCHAIN: ${THREADX_TOOLCHAIN}")

# Define our target library and an alias for consumers
add_library(${PROJECT_NAME})
add_library("azrtos::${PROJECT_NAME}" ALIAS ${PROJECT_NAME})

# A place for generated/copied include files (no need to change)
set(CUSTOM_INC_DIR ${CMAKE_CURRENT_BINARY_DIR}/custom_inc)

# Pick up the port specific variables and apply them
if(DEFINED THREADX_CUSTOM_PORT)
    add_subdirectory(${THREADX_CUSTOM_PORT} threadx_port)
else()
    add_subdirectory(${CMAKE_CURRENT_LIST_DIR}/${TX_PORT_DIR}/${TX_ARCH_DIR}/${THREADX_TOOLCHAIN})
endif()

# Pick up the common stuff
add_subdirectory(${CMAKE_CURRENT_LIST_DIR}/${TX_COMMON_DIR})

# Define the FreeRTOS adaptation layer
add_library(freertos-threadx EXCLUDE_FROM_ALL)
target_include_directories(freertos-threadx
    SYSTEM
    PUBLIC
    ${CMAKE_CURRENT_LIST_DIR}/utility/rtos_compatibility_layers/FreeRTOS
)
target_sources(freertos-threadx
    PRIVATE
    ${CMAKE_CURRENT_LIST_DIR}/utility/rtos_compatibility_layers/FreeRTOS/tx_freertos.c
)
target_link_libraries(freertos-threadx PUBLIC threadx)

# Define the POSIX compatibility layer.  It supplies its own errno.h, fcntl.h,
# pthread.h, sched.h, signal.h and time.h, so it cannot be combined with the
# hosted simulation ports: those build against a full C library that already
# provides those headers, and the layer's pthread.h even shares the _PTHREAD_H
# include guard with glibc's.  Skip it there rather than offering a target that
# could never build.
#
# It is also single-core by construction: px_int.h declares
# _tx_thread_current_ptr as a plain pointer, which is a per-core array in an SMP
# build, and the layer has no notion of which core it is running on.
if(THREADX_ARCH MATCHES "^(linux|win32|win64)$")
    message(STATUS "POSIX compatibility layer not available for ${THREADX_ARCH}")
elseif(THREADX_SMP)
    message(STATUS "POSIX compatibility layer not available for SMP builds")
else()
    add_subdirectory(${CMAKE_CURRENT_LIST_DIR}/utility/rtos_compatibility_layers/posix)
endif()

# If the user provided an override, copy it to the custom directory
if (NOT TX_USER_FILE)
    message(STATUS "Using default tx_user.h file")
    set(TX_USER_FILE ${CMAKE_CURRENT_LIST_DIR}/${TX_COMMON_DIR}/inc/tx_user_sample.h)
else()
    message(STATUS "Using custom tx_user.h file from ${TX_USER_FILE}")
endif()
configure_file(${TX_USER_FILE} ${CUSTOM_INC_DIR}/tx_user.h COPYONLY)
target_include_directories(${PROJECT_NAME}
    SYSTEM
    PUBLIC
    ${CUSTOM_INC_DIR}
)
target_compile_definitions(${PROJECT_NAME} PUBLIC "TX_INCLUDE_USER_DEFINE_FILE" )
if(THREADX_SMP)
    target_compile_definitions(${PROJECT_NAME} PUBLIC "TX_MPCORE" )
endif()

# Optional: build for S-mode (Supervisor mode) instead of M-mode (Machine mode).
# Required when running after OpenSBI, e.g. booted from U-Boot.
option(TX_RISCV_SMODE "Use S-mode CSRs instead of M-mode for RISC-V targets" OFF)
if(TX_RISCV_SMODE)
    message(STATUS "RISC-V S-mode enabled (TX_RISCV_SMODE)")
    target_compile_definitions(${PROJECT_NAME} PUBLIC "TX_RISCV_SMODE")
endif()

# Enable a build target that produces a ZIP file of all sources
set(CPACK_SOURCE_GENERATOR "ZIP")
set(CPACK_SOURCE_IGNORE_FILES
  \\.git/
  \\.github/
  _build/
  \\.git
  \\.gitattributes
  \\.gitignore
  ".*~$"
)
set(CPACK_VERBATIM_VARIABLES YES)
include(CPack)