tests/cmake/CMakeLists.txt

#***************************************************************************
#                                  _   _ ____  _
#  Project                     ___| | | |  _ \| |
#                             / __| | | | |_) | |
#                            | (__| |_| |  _ <| |___
#                             \___|\___/|_| \_\_____|
#
# Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
#
# This software is licensed as described in the file COPYING, which
# you should have received as part of this distribution. The terms
# are also available at https://curl.se/docs/copyright.html.
#
# You may opt to use, copy, modify, merge, publish, distribute and/or sell
# copies of the Software, and permit persons to whom the Software is
# furnished to do so, under the terms of the COPYING file.
#
# This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
# KIND, either express or implied.
#
# SPDX-License-Identifier: curl
#
###########################################################################

cmake_minimum_required(VERSION 3.18 FATAL_ERROR)
message(STATUS "Using CMake version ${CMAKE_VERSION}")

option(TEST_CPP "Test C++" OFF)

if(TEST_CPP)
  project(test-CPP-consumer CXX)
  set(_source "test.cpp")
else()
  project(test-C-consumer C)
  set(_source "test.c")
endif()

option(TEST_INTEGRATION_MODE "Integration mode" "find_package")

message(STATUS "TEST_INTEGRATION_MODE: ${TEST_INTEGRATION_MODE}")

if(TEST_INTEGRATION_MODE STREQUAL "find_package")
  find_package(CURL REQUIRED CONFIG)
  find_package(CURL REQUIRED CONFIG)  # Double-inclusion test
  foreach(_result_var IN ITEMS
      CURL_FOUND
      CURL_SUPPORTS_HTTPS
      CURL_SUPPORTS_Largefile
      CURL_VERSION
      CURL_VERSION_STRING
  )
    if(NOT ${_result_var})
      message(FATAL_ERROR "'${_result_var}' variable expected, but not set by the CURL package.")
    endif()
  endforeach()
  # Show variables set by find_package()
  get_cmake_property(_vars VARIABLES)
  foreach(_var IN ITEMS ${_vars})
    string(TOUPPER "${_var}" _var_upper)
    if(_var_upper MATCHES "CURL")
      get_property(_var_type CACHE ${_var} PROPERTY TYPE)
      if(_var_type)
        set(_var_type ":${_var_type}")
      endif()
      message("find_package() sets: ${_var}${_var_type} = '${${_var}}'")
    endif()
  endforeach()
elseif(TEST_INTEGRATION_MODE STREQUAL "add_subdirectory")
  set(BUILD_SHARED_LIBS ON CACHE BOOL "")
  set(BUILD_STATIC_LIBS ON CACHE BOOL "")
  add_subdirectory(curl)
elseif(TEST_INTEGRATION_MODE STREQUAL "FetchContent")
  include(FetchContent)
  option(FROM_GIT_REPO "Git URL" "https://github.com/curl/curl.git")
  option(FROM_GIT_TAG "Git tag" "master")
  FetchContent_Declare(curl
    GIT_REPOSITORY "${FROM_GIT_REPO}"
    GIT_TAG "${FROM_GIT_TAG}"
    GIT_SHALLOW)
  set(BUILD_SHARED_LIBS ON CACHE BOOL "")
  set(BUILD_STATIC_LIBS ON CACHE BOOL "")
  FetchContent_MakeAvailable(curl)
elseif(TEST_INTEGRATION_MODE STREQUAL "ExternalProject")
  include(ExternalProject)
  set(_curl_install_dir "${CMAKE_BINARY_DIR}/curl-external-install")
  set(_curl_static_lib "${_curl_install_dir}/lib/${CMAKE_STATIC_LIBRARY_PREFIX}curl${CMAKE_STATIC_LIBRARY_SUFFIX}")
  string(REPLACE " " ";" CURL_TEST_OPTS "${CURL_TEST_OPTS}")
  if(CMAKE_VERSION VERSION_GREATER_EQUAL 3.24)
    set(_download_extract_timestamp "DOWNLOAD_EXTRACT_TIMESTAMP" "ON")
  endif()
  ExternalProject_Add(curl-external
    URL "${FROM_ARCHIVE}" URL_HASH "SHA256=${FROM_HASH}"
    ${_download_extract_timestamp}
    PREFIX "${CMAKE_BINARY_DIR}/curl-external"
    CMAKE_ARGS "-DCMAKE_INSTALL_PREFIX=${_curl_install_dir}" -DBUILD_SHARED_LIBS=OFF -DCURL_USE_LIBPSL=OFF
      -DCURL_USE_CMAKECONFIG=OFF -DCURL_USE_PKGCONFIG=OFF
      -DCURL_ENABLE_SSL=OFF -DCURL_ENABLE_SSL=OFF -DCURL_DISABLE_LDAP=ON -DCURL_USE_LIBSSH2=OFF -DUSE_NGHTTP2=OFF
      -DCURL_BROTLI=OFF -DCURL_ZLIB=OFF -DCURL_ZSTD=OFF -DUSE_LIBIDN2=OFF -DENABLE_IPV6=OFF
      ${CURL_TEST_OPTS}
    BUILD_BYPRODUCTS "${_curl_static_lib}")

  add_executable(test-consumer-static-fetch "${_source}")
  add_dependencies(test-consumer-static-fetch curl-external)
  if(WIN32)
    target_compile_definitions(test-consumer-static-fetch PRIVATE "CURL_STATICLIB")
    list(APPEND _curl_static_lib "ws2_32" "bcrypt")
  endif()
  target_include_directories(test-consumer-static-fetch PRIVATE "${_curl_install_dir}/include")
  target_link_libraries(test-consumer-static-fetch PRIVATE "${_curl_static_lib}")
endif()

if(TEST_INTEGRATION_MODE STREQUAL "find_package" OR
   TEST_INTEGRATION_MODE STREQUAL "add_subdirectory" OR
   TEST_INTEGRATION_MODE STREQUAL "FetchContent")

  add_executable(test-consumer-static-ns "${_source}")
  target_link_libraries(test-consumer-static-ns PRIVATE "CURL::libcurl_static")

  add_executable(test-consumer-shared-ns "${_source}")
  target_link_libraries(test-consumer-shared-ns PRIVATE "CURL::libcurl_shared")

  # Alias for either shared or static library
  add_executable(test-consumer-selected-ns "${_source}")
  target_link_libraries(test-consumer-selected-ns PRIVATE "CURL::libcurl")
endif()

if(TEST_INTEGRATION_MODE STREQUAL "add_subdirectory" OR
   TEST_INTEGRATION_MODE STREQUAL "FetchContent")

  add_executable(test-consumer-static-bare "${_source}")
  target_link_libraries(test-consumer-static-bare PRIVATE "libcurl_static")

  add_executable(test-consumer-shared-bare "${_source}")
  target_link_libraries(test-consumer-shared-bare PRIVATE "libcurl_shared")

  add_executable(test-consumer-selected-bare "${_source}")
  target_link_libraries(test-consumer-selected-bare PRIVATE "libcurl")
endif()