runtime/CMakeLists.txt

cmake_minimum_required(VERSION 3.17.0)

# Start Project
project(runtime)

# Headers
add_library(trampoline-headers INTERFACE)
target_include_directories(trampoline-headers INTERFACE include)

# Build
if(NOT TRAMPOLINE_HEADERS_ONLY)
    # Check Architecture
    include(CheckSymbolExists)
    check_symbol_exists("__arm__" "" NO_RUNTIME_NEEDED)
    if(NOT NO_RUNTIME_NEEDED)
        check_symbol_exists("__aarch64__" "" USE_NATIVE_RUNTIME)
        check_symbol_exists("__x86_64__" "" USE_QEMU_RUNTIME)
        # Include Correct Sub-Project
        set(RUNTIME_RPATH "$ORIGIN/../lib/native")
        set(RUNTIME_EXTRA_LINK_FLAG "--disable-new-dtags")
        target_compile_definitions(trampoline-headers INTERFACE MCPI_BUILD_RUNTIME)
        if(USE_NATIVE_RUNTIME)
            add_subdirectory(native)
        elseif(USE_QEMU_RUNTIME)
            add_subdirectory(qemu)
            target_compile_definitions(trampoline-headers INTERFACE MCPI_RUNTIME_IS_QEMU)
        else()
            message(FATAL_ERROR "Unsupported Architecture")
        endif()
    endif()
else()
    # No-Op Install Function
    function(install_runtime)
    endfunction()
endif()