Separated getarch ASM file when using MSVC.

cmake/prebuild.cmake

@@ -54,11 +54,20 @@ include("${CMAKE_SOURCE_DIR}/cmake/c_check.cmake")
 include("${CMAKE_SOURCE_DIR}/cmake/f_check.cmake")
 
 # compile getarch
+set(GETARCH_SRC
+  ${CMAKE_SOURCE_DIR}/getarch.c
+  ${CPUIDEMO}
+)
+
+if (NOT MSVC)
+  list(APPEND GETARCH_SRC ${CMAKE_SOURCE_DIR}/cpuid.S)
+endif ()
+
 set(GETARCH_DIR "${PROJECT_BINARY_DIR}/getarch_build")
 set(GETARCH_BIN "getarch${CMAKE_EXECUTABLE_SUFFIX}")
 file(MAKE_DIRECTORY ${GETARCH_DIR})
 try_compile(GETARCH_RESULT ${GETARCH_DIR}
-  SOURCES ${CMAKE_SOURCE_DIR}/getarch.c ${CMAKE_SOURCE_DIR}/cpuid.S ${CPUIDEMO}
+  SOURCES ${GETARCH_SRC}
   COMPILE_DEFINITIONS ${EXFLAGS} ${GETARCH_FLAGS} -I${CMAKE_SOURCE_DIR}
   OUTPUT_VARIABLE GETARCH_LOG
   COPY_FILE ${GETARCH_BIN}