Build: Use imported target `CURL::libcurl` instead of variables

Source/CMakeLists.txt

@@ -750,10 +750,10 @@ target_link_libraries(
   PUBLIC
     cmstd
     cmsys
+    CURL::libcurl
     EXPAT::EXPAT
     LibArchive::LibArchive
     ZLIB::ZLIB
-    ${CMAKE_CURL_LIBRARIES}
     ${CMAKE_JSONCPP_LIBRARIES}
     ${CMAKE_LIBUV_LIBRARIES}
     ${CMAKE_LIBRHASH_LIBRARIES}
@@ -1002,9 +1002,8 @@ target_include_directories(
   CTestLib
   PUBLIC
     "${CMake_SOURCE_DIR}/Source/CTest"
-    ${CMAKE_CURL_INCLUDES}
   )
-target_link_libraries(CTestLib PUBLIC CMakeLib ${CMAKE_CURL_LIBRARIES})
+target_link_libraries(CTestLib PUBLIC CMakeLib)
 
 #
 # Build CPackLib

Source/Modules/CMakeBuildUtilities.cmake

@@ -148,11 +148,7 @@ if(CMAKE_USE_SYSTEM_CURL)
     message(FATAL_ERROR
       "CMAKE_USE_SYSTEM_CURL is ON but a curl is not found!")
   endif()
-  set(CMAKE_CURL_INCLUDES ${CURL_INCLUDE_DIRS})
-  set(CMAKE_CURL_LIBRARIES ${CURL_LIBRARIES})
 else()
-  set(CMAKE_CURL_INCLUDES)
-  set(CMAKE_CURL_LIBRARIES cmcurl)
   if(CMAKE_TESTS_CDASH_SERVER)
     set(CMAKE_CURL_TEST_URL "${CMAKE_TESTS_CDASH_SERVER}/user.php")
   endif()
@@ -174,6 +170,7 @@ else()
     set(NGHTTP2_INCLUDE_DIR ${CMAKE_CURRENT_SOURCE_DIR}/Utilities/cmnghttp2/lib/includes)
   endif()
   add_subdirectory(Utilities/cmcurl)
+  add_library(CURL::libcurl ALIAS cmcurl)
   CMAKE_SET_TARGET_FOLDER(cmcurl "Utilities/3rdParty")
   CMAKE_SET_TARGET_FOLDER(LIBCURL "Utilities/3rdParty")
   if(NOT CMAKE_USE_SYSTEM_NGHTTP2)