updated build system

cmake/libraries/spdlog.cmake

@@ -6,15 +6,7 @@ if(PROJECT_ENABLE_SPDLOG)
 
     include_directories(BEFORE SYSTEM ${SPDLOG_INCLUDE_DIRS})
 
-    if(PROJECT_IS_MINGW_UNIX)
-      if(PROJECT_STATIC_LINK)
-        link_libraries(/mingw64/lib/libspdlog.a)
-      else()
-        link_libraries(/mingw64/lib/libspdlog.dll.a)
-      endif()
-    else()
-      link_libraries(spdlog::spdlog) 
-    endif()
+    link_libraries(spdlog::spdlog) 
   elseif(NOT PROJECT_IS_MINGW OR CMAKE_HOST_WIN32)
     ExternalProject_Add(spdlog_project
       PREFIX external
@@ -23,7 +15,6 @@ if(PROJECT_ENABLE_SPDLOG)
       LIST_SEPARATOR |
       CMAKE_ARGS ${PROJECT_EXTERNAL_CMAKE_FLAGS}
         -DBUILD_SHARED_LIBS=${PROJECT_BUILD_SHARED_LIBS}
-        -DBUILD_STATIC_LIBS=ON
         -DSPDLOG_BUILD_EXAMPLE=OFF
         -DSPDLOG_FMT_EXTERNAL=OFF
         -DSPDLOG_FMT_EXTERNAL_HO=OFF