Build/Win: Report CMAKE_MSVC_RUNTIME_LIBRARY value

... when using CMake 3.15+

CMakeLists.txt

@@ -385,6 +385,7 @@ if(MSVC)
   option(WITH_CRT_DLL
     "Link all ${CMAKE_PROJECT_NAME} libraries and executables with the C run-time DLL (msvcr*.dll) instead of the static C run-time library (libcmt*.lib.)  The default is to use the C run-time DLL only with the libraries and executables that need it."
     FALSE)
+  boolean_number(WITH_CRT_DLL)
   if(NOT WITH_CRT_DLL)
     # Use the static C library for all build types
     if(CMAKE_VERSION VERSION_EQUAL "3.15" OR
@@ -394,6 +395,7 @@ if(MSVC)
       else()
         set(CMAKE_MSVC_RUNTIME_LIBRARY MultiThreaded)
       endif()
+      message(STATUS "Visual C++ run-time library: ${CMAKE_MSVC_RUNTIME_LIBRARY} (WITH_CRT_DLL = ${WITH_CRT_DLL})")
     else()
       foreach(var CMAKE_C_FLAGS CMAKE_C_FLAGS_DEBUG CMAKE_C_FLAGS_RELEASE
         CMAKE_C_FLAGS_MINSIZEREL CMAKE_C_FLAGS_RELWITHDEBINFO)

sharedlib/CMakeLists.txt

@@ -18,6 +18,7 @@ if(MSVC)
     else()
       set(CMAKE_MSVC_RUNTIME_LIBRARY MultiThreadedDLL)
     endif()
+    message(STATUS "Visual C++ run-time library for libjpeg API DLL: ${CMAKE_MSVC_RUNTIME_LIBRARY}")
   else()
     foreach(var CMAKE_C_FLAGS CMAKE_C_FLAGS_DEBUG CMAKE_C_FLAGS_RELEASE
       CMAKE_C_FLAGS_MINSIZEREL CMAKE_C_FLAGS_RELWITHDEBINFO)