CMakeLists.txt

cmake_minimum_required(VERSION 3.10)

set(CODSPEED_VERSION 1.0.0)

project(codspeed VERSION ${CODSPEED_VERSION} LANGUAGES CXX)

# Specify the C++ standard
set(CMAKE_CXX_STANDARD 17)
set(CMAKE_CXX_STANDARD_REQUIRED True)

# Add the include directory
include_directories(include)

# Add the library
add_library(codspeed src/codspeed.cpp src/walltime.cpp src/uri.cpp)

# Version
add_compile_definitions(CODSPEED_VERSION="${CODSPEED_VERSION}")

# Specify the include directories for users of the library
target_include_directories(
    codspeed
    PUBLIC $<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}/include>
)

# Disable valgrind compilation errors
if(CMAKE_CXX_COMPILER_ID MATCHES "GNU|Clang")
    # Disable the old-style-cast warning for the specific target
    target_compile_options(codspeed PRIVATE -Wno-old-style-cast)
endif()

execute_process(
    COMMAND git rev-parse --show-toplevel
    OUTPUT_VARIABLE GIT_ROOT_DIR
    OUTPUT_STRIP_TRAILING_WHITESPACE
    RESULT_VARIABLE GIT_COMMAND_RESULT
)

if(NOT GIT_COMMAND_RESULT EQUAL 0)
    message(
        WARNING
        "Failed to determine the git root directory.\
        Check that git is in your PATH, and that you are in a git repository.\
        Continuing, but codspeed features will not be useable"
    )
    # Default to user's cmake source directory
    set(GIT_ROOT_DIR ${CMAKE_SOURCE_DIR})
endif()

target_compile_definitions(
    codspeed
    INTERFACE -DCODSPEED_GIT_ROOT_DIR="${GIT_ROOT_DIR}"
)

set(CODSPEED_MODE_ALLOWED_VALUES "OFF" "instrumentation" "walltime")
set(CODSPEED_MODE "OFF" CACHE STRING "Build mode for Codspeed")
set_property(
    CACHE CODSPEED_MODE
    PROPERTY STRINGS ${CODSPEED_MODE_ALLOWED_VALUES}
)

if(NOT CODSPEED_MODE STREQUAL "OFF")
    target_compile_definitions(codspeed INTERFACE -DCODSPEED_ENABLED)

    if(NOT CMAKE_BUILD_TYPE)
        message(
            WARNING
            "CMAKE_BUILD_TYPE is not set. Consider setting it to 'RelWithDebInfo'."
        )
    elseif(NOT CMAKE_BUILD_TYPE STREQUAL "RelWithDebInfo")
        message(
            WARNING
            "CMAKE_BUILD_TYPE is set to '${CMAKE_BUILD_TYPE}', but 'RelWithDebInfo' is recommended."
        )
    endif()

    # Define a preprocessor macro based on the build mode
    if(CODSPEED_MODE STREQUAL "instrumentation")
        target_compile_definitions(
            codspeed
            INTERFACE -DCODSPEED_INSTRUMENTATION
        )
    elseif(CODSPEED_MODE STREQUAL "walltime")
        target_compile_definitions(codspeed INTERFACE -DCODSPEED_WALLTIME)
    else()
        message(
            FATAL_ERROR
            "Invalid build mode: ${CODSPEED_MODE}. Use one of ${CODSPEED_MODE_ALLOWED_VALUES}."
        )
    endif()
endif()

message(STATUS "Codspeed mode: ${CODSPEED_MODE}")

option(ENABLE_TESTS "Enable building the unit tests which depend on gtest" OFF)
if(ENABLE_TESTS)
    enable_testing()
    add_subdirectory(test)
endif()