CMakeLists.txt

cmake_minimum_required(VERSION 3.20)

project(OpenADS
    VERSION 1.0.0
    LANGUAGES C CXX
    DESCRIPTION "Open-source ADS-compatible engine"
)

# Resolve the public version string the binary reports through
# `--version`. Prefer `git describe --tags` so a build straight off
# tag v1.0.0-rc13 reports "1.0.0-rc13", a build off main (between
# tags) reports "1.0.0-rc13-7-g<sha>[-dirty]", and a tarball without
# a .git tree falls back to ${PROJECT_VERSION} from project() above.
# The previous hard-coded "1.0.0-rc1" string drifted six releases
# behind reality and surprised users running rc12.
set(OPENADS_VERSION_STR "${PROJECT_VERSION}")
find_package(Git QUIET)
if(GIT_FOUND AND EXISTS "${CMAKE_SOURCE_DIR}/.git")
    execute_process(
        COMMAND ${GIT_EXECUTABLE} describe --tags --always --dirty
        WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
        OUTPUT_VARIABLE _git_describe
        OUTPUT_STRIP_TRAILING_WHITESPACE
        ERROR_QUIET
        RESULT_VARIABLE _git_rc)
    if(_git_rc EQUAL 0 AND NOT _git_describe STREQUAL "")
        # Strip a leading "v" so tags v1.0.0-rc13 surface as 1.0.0-rc13.
        string(REGEX REPLACE "^v" "" OPENADS_VERSION_STR "${_git_describe}")
    endif()
endif()
message(STATUS "OpenADS version: ${OPENADS_VERSION_STR}")
add_compile_definitions(OPENADS_VERSION_STR="${OPENADS_VERSION_STR}")

set(CMAKE_CXX_STANDARD 17)
set(CMAKE_CXX_STANDARD_REQUIRED ON)
set(CMAKE_CXX_EXTENSIONS OFF)

# openads_core is a STATIC library that gets linked into both an
# executable (openads_serverd, tests) and a SHARED library
# (openads_ace -> ace64.dll / libace64.so). On Linux / macOS the
# shared-library link path requires every translation unit pulled
# in to be position-independent, otherwise we hit
# `R_X86_64_TPOFF32 ... can not be used when making a shared
# object; recompile with -fPIC`. Force PIC globally — Windows
# silently ignores the flag, so this is a no-op there.
set(CMAKE_POSITION_INDEPENDENT_CODE ON)

if(NOT CMAKE_BUILD_TYPE AND NOT CMAKE_CONFIGURATION_TYPES)
    set(CMAKE_BUILD_TYPE Release CACHE STRING "" FORCE)
endif()

option(OPENADS_BUILD_TESTS "Build OpenADS unit tests" ON)
option(OPENADS_WARNINGS_AS_ERRORS "Treat warnings as errors" ON)

# M12.12 — real TLS transport via vendored mbedtls (Apache-2.0).
# Off by default so existing builds don't pull a network dependency
# at configure time. When ON, FetchContent downloads mbedtls 3.6 LTS
# at configure time and links it into openads_core; AdsConnect60
# with a `tls://` URI then opens a TlsTransport instead of returning
# AE_FUNCTION_NOT_AVAILABLE.
option(OPENADS_WITH_TLS "Enable TLS transport (vendors mbedtls 3.6 LTS via FetchContent)" OFF)

# studio.web — embedded HTTP web console inside openads_serverd.
# When ON, serverd gains a `--http-port N` flag that exposes a
# single-page admin UI + REST API on top of the running engine,
# so the database can be administered from any browser on the LAN
# without installing a desktop client. Vendors cpp-httplib (MIT)
# and nlohmann/json (MIT) at configure time via FetchContent.
option(OPENADS_WITH_HTTP "Enable embedded HTTP web console (Studio) in openads_serverd / ace64.dll" ON)

# Pull in mbedtls FIRST so our strict /WX -Werror flags don't bleed
# into the upstream sources (C4200 zero-sized arrays etc). Each
# OpenADS target adds the strict flags target-locally below via
# `apply_openads_warnings(<target>)`.
if(OPENADS_WITH_TLS)
    include(FetchContent)
    set(ENABLE_TESTING OFF CACHE BOOL "" FORCE)
    set(ENABLE_PROGRAMS OFF CACHE BOOL "" FORCE)
    set(MBEDTLS_FATAL_WARNINGS OFF CACHE BOOL "" FORCE)
    # Force a STATIC mbedtls so the OpenADS DLL / server binary
    # has no runtime dependency on a system OpenSSL. Reported by
    # downstream users: a release ZIP without those system DLLs
    # fails to launch on a clean Windows / macOS box. Static
    # linking sidesteps that whole class of "missing libssl/
    # libcrypto" deployment errors.
    set(USE_STATIC_MBEDTLS_LIBRARY ON  CACHE BOOL "" FORCE)
    set(USE_SHARED_MBEDTLS_LIBRARY OFF CACHE BOOL "" FORCE)
    set(BUILD_SHARED_LIBS          OFF CACHE BOOL "" FORCE)
    FetchContent_Declare(
        mbedtls
        GIT_REPOSITORY https://github.com/Mbed-TLS/mbedtls.git
        GIT_TAG        v3.6.2
        GIT_SHALLOW    TRUE
    )
    FetchContent_MakeAvailable(mbedtls)
    message(STATUS "OpenADS: TLS enabled via vendored mbedtls 3.6.2 (statically linked)")
endif()

if(OPENADS_WITH_HTTP)
    include(FetchContent)
    # cpp-httplib auto-detects OpenSSL / zlib / brotli on the host
    # and pulls them in as link libraries on its INTERFACE target.
    # That collides with the OpenADS no-runtime-DLL deployment
    # promise (the shipped DLL must not depend on libssl /
    # libcrypto). Force-disable the auto-link so Linux/macOS
    # builds match the Windows side: plain HTTP only, no system
    # OpenSSL pulled into ace64.dll / libace64.so.
    set(HTTPLIB_USE_OPENSSL_IF_AVAILABLE OFF CACHE BOOL "" FORCE)
    set(HTTPLIB_USE_ZLIB_IF_AVAILABLE    OFF CACHE BOOL "" FORCE)
    set(HTTPLIB_USE_BROTLI_IF_AVAILABLE  OFF CACHE BOOL "" FORCE)
    set(HTTPLIB_REQUIRE_OPENSSL          OFF CACHE BOOL "" FORCE)
    FetchContent_Declare(
        cpp_httplib
        GIT_REPOSITORY https://github.com/yhirose/cpp-httplib.git
        GIT_TAG        v0.18.5
        GIT_SHALLOW    TRUE
    )
    FetchContent_Declare(
        nlohmann_json
        GIT_REPOSITORY https://github.com/nlohmann/json.git
        GIT_TAG        v3.11.3
        GIT_SHALLOW    TRUE
    )
    set(JSON_BuildTests OFF CACHE INTERNAL "")
    FetchContent_MakeAvailable(cpp_httplib nlohmann_json)
    message(STATUS "OpenADS: HTTP web console enabled (cpp-httplib + nlohmann/json)")
endif()

if(MSVC)
    add_compile_options(/W4 /permissive-)
    add_compile_definitions(_CRT_SECURE_NO_WARNINGS)
    if(OPENADS_WARNINGS_AS_ERRORS)
        add_compile_options(/WX)
    endif()
else()
    add_compile_options(-Wall -Wextra -Wpedantic -Wshadow -Wconversion)
    # _CRT_SECURE_NO_WARNINGS: needed when clang-cl targets MSVC CRT on Windows;
    # harmless on Linux/macOS where this define has no effect.
    add_compile_definitions(_CRT_SECURE_NO_WARNINGS)
    if(OPENADS_WARNINGS_AS_ERRORS)
        add_compile_options(-Werror)
    endif()
endif()

add_subdirectory(src)
add_subdirectory(tools/serverd)
add_subdirectory(tools/bench)
add_subdirectory(tools/stress)
add_subdirectory(tools/mgprobe)
add_subdirectory(tools/import_dd)

if(OPENADS_BUILD_TESTS)
    enable_testing()
    add_subdirectory(tests)
endif()