cmake_minimum_required(VERSION 3.30)
project(libcurl-test C)

block(SCOPE_FOR VARIABLES)
    # blocked by FindOpenSSL in CMake 3.30: set(CMAKE_DISABLE_FIND_PACKAGE_PkgConfig 1)
    set(env_pkg_config_backup "$ENV{PKG_CONFIG}")
    set(ENV{PKG_CONFIG} "${CMAKE_COMMAND} -E false")

    find_package(CURL COMPONENTS libz REQUIRED)

    add_executable(main-targets main.c)
    target_link_libraries(main-targets PRIVATE CURL::libcurl)

    add_executable(main-variables main.c)
    target_include_directories(main-variables PRIVATE ${CURL_INCLUDE_DIRS})
    target_link_libraries(main-variables PRIVATE ${CURL_LIBRARIES})

    unset(PKG_CONFIG_EXECUTABLE CACHE)
    unset(PKG_CONFIG_ARGN CACHE)
    set(ENV{PKG_CONFIG} "${env_pkg_config_backup}")
endblock()

block(SCOPE_FOR VARIABLES)
    find_package(PkgConfig REQUIRED)
    pkg_check_modules(libcurl_pc libcurl REQUIRED IMPORTED_TARGET)

    add_executable(main-pkgconfig main.c)
    target_link_libraries(main-pkgconfig PRIVATE PkgConfig::libcurl_pc)
endblock()

block(SCOPE_FOR VARIABLES)
if(NOT CMAKE_HOST_WIN32)
    find_program(CURL_CONFIG NAMES curl-config REQUIRED)
    execute_process(COMMAND "${CURL_CONFIG}" --cflags OUTPUT_VARIABLE curl-config-cflags OUTPUT_STRIP_TRAILING_WHITESPACE)
    separate_arguments(curl-config-cflags UNIX_COMMAND "${curl-config-cflags}")
    execute_process(COMMAND "${CURL_CONFIG}" --libs OUTPUT_VARIABLE curl-config-libs OUTPUT_STRIP_TRAILING_WHITESPACE)
    separate_arguments(curl-config-libs UNIX_COMMAND "${curl-config-libs}")
    string(REGEX REPLACE "(^-|;-)framework;" "\\1framework " curl-config-libs "${curl-config-libs}")

    add_executable(main-curl-config main.c)
    target_compile_options(main-curl-config PRIVATE ${curl-config-cflags})
    target_link_libraries(main-curl-config PRIVATE ${curl-config-libs})
endif()
endblock()