src/CMakeLists.txt

# Allow the source files to find headers in src/
include(GNUInstallDirs)
include_directories(${PROJECT_SOURCE_DIR}/src)

if (DEFINED BENCHMARK_CXX_LINKER_FLAGS)
  list(APPEND CMAKE_SHARED_LINKER_FLAGS ${BENCHMARK_CXX_LINKER_FLAGS})
  list(APPEND CMAKE_MODULE_LINKER_FLAGS ${BENCHMARK_CXX_LINKER_FLAGS})
endif()

file(GLOB
  SOURCE_FILES
    *.cc
    ${PROJECT_SOURCE_DIR}/include/benchmark/*.h
    ${CMAKE_CURRENT_SOURCE_DIR}/*.h)
file(GLOB BENCHMARK_MAIN "benchmark_main.cc")
foreach(item ${BENCHMARK_MAIN})
  list(REMOVE_ITEM SOURCE_FILES "${item}")
endforeach()

add_library(benchmark ${SOURCE_FILES})
add_library(benchmark::benchmark ALIAS benchmark)
set_target_properties(benchmark PROPERTIES
  OUTPUT_NAME "benchmark"
  VERSION ${GENERIC_LIB_VERSION}
  SOVERSION ${GENERIC_LIB_SOVERSION}
)
target_include_directories(benchmark PUBLIC
  $<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}/include>)

# libpfm, if available
if (HAVE_LIBPFM)
  target_link_libraries(benchmark PRIVATE pfm)
  add_definitions(-DHAVE_LIBPFM)
endif()

# Link threads.
target_link_libraries(benchmark PRIVATE Threads::Threads)

target_link_libraries(benchmark PRIVATE ${BENCHMARK_CXX_LIBRARIES})

if(HAVE_LIB_RT)
  target_link_libraries(benchmark PRIVATE rt)
endif(HAVE_LIB_RT)


# We need extra libraries on Windows
if(${CMAKE_SYSTEM_NAME} MATCHES "Windows")
  target_link_libraries(benchmark PRIVATE shlwapi)
endif()

# We need extra libraries on Solaris
if(${CMAKE_SYSTEM_NAME} MATCHES "SunOS")
  target_link_libraries(benchmark PRIVATE kstat)
endif()

# Benchmark main library
add_library(benchmark_main "benchmark_main.cc")
add_library(benchmark::benchmark_main ALIAS benchmark_main)
set_target_properties(benchmark_main PROPERTIES
  OUTPUT_NAME "benchmark_main"
  VERSION ${GENERIC_LIB_VERSION}
  SOVERSION ${GENERIC_LIB_SOVERSION}
)
target_link_libraries(benchmark_main PUBLIC benchmark::benchmark)


set(generated_dir "${PROJECT_BINARY_DIR}")

set(version_config "${generated_dir}/${PROJECT_NAME}ConfigVersion.cmake")
set(project_config "${generated_dir}/${PROJECT_NAME}Config.cmake")
set(pkg_config "${generated_dir}/${PROJECT_NAME}.pc")
set(targets_to_export benchmark benchmark_main)
set(targets_export_name "${PROJECT_NAME}Targets")

set(namespace "${PROJECT_NAME}::")

include(CMakePackageConfigHelpers)

configure_package_config_file (
  ${PROJECT_SOURCE_DIR}/cmake/Config.cmake.in
  ${project_config}
  INSTALL_DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/${PROJECT_NAME}
  NO_SET_AND_CHECK_MACRO
  NO_CHECK_REQUIRED_COMPONENTS_MACRO
)
write_basic_package_version_file(
  "${version_config}" VERSION ${GENERIC_LIB_VERSION} COMPATIBILITY SameMajorVersion
)

configure_file("${PROJECT_SOURCE_DIR}/cmake/benchmark.pc.in" "${pkg_config}" @ONLY)

export (
  TARGETS ${targets_to_export}
  NAMESPACE "${namespace}"
  FILE ${generated_dir}/${targets_export_name}.cmake
)

if (BENCHMARK_ENABLE_INSTALL)
  # Install target (will install the library to specified CMAKE_INSTALL_PREFIX variable)
  install(
    TARGETS ${targets_to_export}
    EXPORT ${targets_export_name}
    ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
    LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
    RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
    INCLUDES DESTINATION ${CMAKE_INSTALL_INCLUDEDIR})

  install(
    DIRECTORY "${PROJECT_SOURCE_DIR}/include/benchmark"
    DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}
    FILES_MATCHING PATTERN "*.*h")

  install(
      FILES "${project_config}" "${version_config}"
      DESTINATION "${CMAKE_INSTALL_LIBDIR}/cmake/${PROJECT_NAME}")

  install(
      FILES "${pkg_config}"
      DESTINATION "${CMAKE_INSTALL_LIBDIR}/pkgconfig")

  install(
      EXPORT "${targets_export_name}"
      NAMESPACE "${namespace}"
      DESTINATION "${CMAKE_INSTALL_LIBDIR}/cmake/${PROJECT_NAME}")
endif()

if (BENCHMARK_ENABLE_DOXYGEN)
  find_package(Doxygen REQUIRED)
  set(DOXYGEN_QUIET YES)
  set(DOXYGEN_RECURSIVE YES)
  set(DOXYGEN_GENERATE_HTML YES)
  set(DOXYGEN_GENERATE_MAN NO)
  set(DOXYGEN_MARKDOWN_SUPPORT YES)
  set(DOXYGEN_BUILTIN_STL_SUPPORT YES)
  set(DOXYGEN_EXTRACT_PACKAGE YES)
  set(DOXYGEN_EXTRACT_STATIC YES)
  set(DOXYGEN_SHOW_INCLUDE_FILES YES)
  set(DOXYGEN_BINARY_TOC YES)
  set(DOXYGEN_TOC_EXPAND YES)
  set(DOXYGEN_USE_MDFILE_AS_MAINPAGE "index.md")
  doxygen_add_docs(benchmark_doxygen
    docs
    include
    src
    ALL
    WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}
    COMMENT "Building documentation with Doxygen.")
  if (BENCHMARK_ENABLE_INSTALL AND BENCHMARK_INSTALL_DOCS)
    install(
      DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}/html/"
      DESTINATION ${CMAKE_INSTALL_DOCDIR})
  endif()
else()
  if (BENCHMARK_ENABLE_INSTALL AND BENCHMARK_INSTALL_DOCS)
    install(
      DIRECTORY "${PROJECT_SOURCE_DIR}/docs/"
      DESTINATION ${CMAKE_INSTALL_DOCDIR})
  endif()
endif()