Don't run library check under MSVC

src/ansi-c/library_check.sh does not work under MSVC, as that compiler
uses completely different flags. This commit removes the file generated
by that script---library-check.stamp---from the dependency graph under
cmake.

This commit fixes #4295.

Author: karkhaz

src/ansi-c/CMakeLists.txt

@@ -50,9 +50,11 @@ add_custom_command(
     WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
 )
 
-add_custom_target(c_library_check
-    DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/library-check.stamp
+if(NOT "${CMAKE_CXX_COMPILER_ID}" STREQUAL "MSVC")
+    add_custom_target(c_library_check
+        DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/library-check.stamp
 )
+endif()
 
 ################################################################################
 
@@ -102,6 +104,12 @@ set(extra_dependencies
     ${CMAKE_CURRENT_BINARY_DIR}/library-check.stamp
 )
 
+if("${CMAKE_CXX_COMPILER_ID}" STREQUAL "MSVC")
+    list(REMOVE_ITEM
+         extra_dependencies
+         ${CMAKE_CURRENT_BINARY_DIR}/library-check.stamp)
+endif()
+
 file(GLOB_RECURSE sources "*.cpp" "*.h")
 
 list(REMOVE_ITEM sources

src/cpp/CMakeLists.txt

@@ -22,9 +22,11 @@ add_custom_command(
     WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
 )
 
+if(NOT "${CMAKE_CXX_COMPILER_ID}" STREQUAL "MSVC")
 add_custom_target(cpp_library_check
     DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/library-check.stamp
 )
+endif()
 
 ################################################################################