Use a more robust method of obtaining the build timestamp on Windows.…

… 'wmic os get LocalDateTime' will always return the timestamp in the format we want (YYYYMMDD), whereas date /t is sensitive to locale. If wmic fails, then we fall back to using date /t, even though this means that the BUILD variable will end up in the incorrect format on some systems.

git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/branches/1.1.x@869 632fc199-4ca6-4c93-a231-07263d6284db

CMakeLists.txt

@@ -11,9 +11,15 @@ if(MINGW OR CYGWIN)
   execute_process(COMMAND "date" "+%Y%m%d" OUTPUT_VARIABLE BUILD)
   string(REGEX REPLACE "\n" "" BUILD ${BUILD})
 elseif(WIN32)
-  execute_process(COMMAND "${CMAKE_SOURCE_DIR}/cmakescripts/getdate.bat"
-    OUTPUT_VARIABLE BUILD)
-  string(REGEX REPLACE "\n" "" BUILD ${BUILD})
+  execute_process(COMMAND "wmic.exe" "os" "get" "LocalDateTime" OUTPUT_VARIABLE
+    BUILD)
+  string(REGEX REPLACE "[^0-9]" "" BUILD "${BUILD}")
+  if (BUILD STREQUAL "")
+    execute_process(COMMAND "cmd.exe" "/C" "DATE" "/T" OUTPUT_VARIABLE BUILD)
+    string(REGEX REPLACE ".*[ ]([0-9]*)[/.]([0-9]*)[/.]([0-9]*).*" "\\3\\2\\1" BUILD "${BUILD}")
+  else()
+    string(SUBSTRING "${BUILD}" 0 8 BUILD)
+  endif()
 else()
   message(FATAL_ERROR "Platform not supported by this build system.  Use autotools instead.")
 endif()