updated ml build scripts to assume required tools are already set up, and added comments specifying which tools are required

ml/build.cmd

@@ -2,7 +2,11 @@
 SETLOCAL
 
 REM Script to generate, compile, test, and document the Z3 OCaml API
+REM
+REM Assumes that environment variables are set to provide access to the C and OCaml compilers, including flexdll and camlidl, as well as the following commands: diff, dos2unix, grep, sed, unix2dos
+REM
 REM usage: build.cmd [32|64] [-D UNSAFE_ERRORS] [-D LEAK_CONTEXTS]
+REM
 REM Invoke with "-D UNSAFE_ERRORS" to build version that does not support recoverable errors, but avoids some error-checking overhead.
 REM Invoke with "-D LEAK_CONTEXTS" to build version that leaks Z3_context objects, but avoids some garbage-collection overhead.
 
@@ -22,12 +26,6 @@ if %BITS% == 32 (
   set Z3DBG= ..\x64\Debug
 )
 
-echo { Setting up environment
-call "C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\vcvarsall.bat" %ARCH%
-call ..\tools\ocaml\win%BITS%\setup.cmd
-set PATH=..\tools;..\mlV3;%PATH%
-echo }
-
 echo { Cleaning
 call .\clean.cmd
 echo }
@@ -52,4 +50,4 @@ call .\update-ml-doc.cmd ..\doc
 if errorlevel 1 goto :EOF
 echo }
 
-ENDLOCAL
+ENDLOCAL