opt/fsext: kernel mode winfsp extension

tools/impdef.bat

@@ -0,0 +1,44 @@
+@echo off
+
+setlocal
+setlocal EnableDelayedExpansion
+
+if X%1==X goto usage
+if X%2==X goto usage
+set infile=%1
+set infile=%infile:/=\%
+set outfile=%2
+set outfile=%outfile:/=\%
+set workdir=!infile!.work
+set workbase=!workdir!\%~n1
+set outarch=%~n2
+set outarch=%outarch:~-3%
+
+set arch=x64
+set cdef=/D_AMD64_
+if /i X%outarch%==Xx86 set arch=x86
+if /i X%outarch%==Xx86 set cdef=/D_X86_
+
+call "%VS140COMNTOOLS%\..\..\VC\vcvarsall.bat" !arch!
+set INCLUDE=%~dp0..\opt\fsext\inc;%~dp0..\inc;!WindowsSdkDir!Include\!WindowsSDKVersion!km\crt;!WindowsSdkDir!Include\!WindowsSDKVersion!km;!WindowsSdkDir!Include\!WindowsSDKVersion!km\shared;!INCLUDE!
+
+if exist !workdir! rmdir /s/q !workdir!
+mkdir !workdir!
+
+type !infile! >>!workbase!.c
+cl /LD /Fe!workbase!.sys /Fo!workbase!.obj !cdef! /D_KERNEL_MODE /wd4716 !workbase!.c
+if errorlevel 1 goto fail
+
+copy !workbase!.lib !outfile!
+if errorlevel 1 goto fail
+
+rmdir /s/q !workdir!
+
+exit /b 0
+
+:fail
+exit /b 1
+
+:usage
+echo usage: impdef.bat infile.impdef outfile.lib 1>&2
+exit /b 2