Merge forward extras beyond python#21907 backport.

PCbuild/build.bat

@@ -9,8 +9,10 @@ rem  -r  Target Rebuild instead of Build
 rem  -t  Set the target manually (Build, Rebuild, Clean, or CleanAll)
 rem  -d  Set the configuration to Debug
 rem  -e  Pull in external libraries using get_externals.bat
+rem  -m  Enable parallel build (enabled by default)
 rem  -M  Disable parallel build
 rem  -v  Increased output messages
+rem  -k  Attempt to kill any running Pythons before building (usually unnecessary)
 
 setlocal
 set platf=Win32
@@ -20,6 +22,7 @@ set target=Build
 set dir=%~dp0
 set parallel=/m
 set verbose=/nologo /v:m
+set kill=
 
 :CheckOpts
 if '%1'=='-c' (set conf=%2) & shift & shift & goto CheckOpts
@@ -28,14 +31,20 @@ if '%1'=='-r' (set target=Rebuild) & shift & goto CheckOpts
 if '%1'=='-t' (set target=%2) & shift & shift & goto CheckOpts
 if '%1'=='-d' (set conf=Debug) & shift & goto CheckOpts
 if '%1'=='-e' call "%dir%get_externals.bat" & shift & goto CheckOpts
+if '%1'=='-m' (set parallel=/m) & shift & goto CheckOpts
 if '%1'=='-M' (set parallel=) & shift & goto CheckOpts
 if '%1'=='-v' (set verbose=/v:n) & shift & goto CheckOpts
+if '%1'=='-k' (set kill=true) & shift & goto CheckOpts
 
 if '%platf%'=='x64' (set vs_platf=x86_amd64)
 
 rem Setup the environment
 call "%dir%env.bat" %vs_platf% >nul
 
+if '%kill%'=='true' (
+    msbuild /v:m /nologo /target:KillPython "%pcbuild%\pythoncore.vcxproj" /p:Configuration=%conf% /p:Platform=%platf% /p:KillPython=true
+)
+
 rem Call on MSBuild to do the work, echo the command.
 rem Passing %1-9 is not the preferred option, but argument parsing in
 rem batch is, shall we say, "lackluster"

Tools/buildbot/build.bat

@@ -1,10 +1,7 @@
 @rem Used by the buildbot "compile" step.
 
 @rem Clean up
-set PLAT=
-if '%1' EQU '-p' if '%2' EQU 'x64' (set PLAT=-amd64)
-
-call "%~dp0clean%PLAT%.bat"
+call "%~dp0clean.bat" %*
 
 @rem If you need the buildbots to start fresh (such as when upgrading to
 @rem a new version of an external library, especially Tcl/Tk):
@@ -17,4 +14,4 @@ call "%~dp0clean%PLAT%.bat"
 @rem 4) re-comment, commit and push again
 
 @rem Do the build
-call "%~dp0..\..\PCbuild\build.bat" -e -d -v %*
+call "%~dp0..\..\PCbuild\build.bat" -e -d -k -v %*

Tools/buildbot/clean-amd64.bat

@@ -1,2 +1,2 @@
 @rem Used by the buildbot "clean" step.
-@call "%~dp0clean.bat" x64
+call "%~dp0clean.bat" -p x64 %*

Tools/buildbot/clean.bat

@@ -5,25 +5,12 @@ setlocal
 set root=%~dp0..\..
 set pcbuild=%root%\PCbuild
 
-if "%1" == "x64" (
-    set vcvars_target=x86_amd64
-    set platform=x64
-) else (
-    set vcvars_target=x86
-    set platform=Win32
-)
-
-call "%pcbuild%\env.bat" %vcvars_target%
-
-echo.Attempting to kill Pythons...
-msbuild /v:m /nologo /target:KillPython "%pcbuild%\pythoncore.vcxproj" /p:Configuration=Release /p:Platform=%platform% /p:KillPython=true
+echo Deleting build
+call "%pcbuild%\build.bat" -t Clean -k %*
+call "%pcbuild%\build.bat" -t Clean -k -d %*
 
 echo Deleting .pyc/.pyo files ...
 del /s "%root%\Lib\*.pyc" "%root%\Lib\*.pyo"
 
 echo Deleting test leftovers ...
 rmdir /s /q "%root%\build"
-
-echo Deleting build
-msbuild /v:m /nologo /target:clean "%pcbuild%\pcbuild.proj" /p:Configuration=Release /p:Platform=%platform%
-msbuild /v:m /nologo /target:clean "%pcbuild%\pcbuild.proj" /p:Configuration=Debug /p:Platform=%platform%

Tools/buildbot/test-amd64.bat

@@ -1,5 +1,2 @@
 @rem Used by the buildbot "test" step.
-
-setlocal
-
-call "%~dp0..\..\PCbuild\rt.bat" -d -q -x64 -uall -rwW -n --timeout=3600 %*
+call "%~dp0test.bat" -x64 %*

Tools/buildbot/test.bat

@@ -1,5 +1,15 @@
 @rem Used by the buildbot "test" step.
+@setlocal
 
-setlocal
+@set here=%~dp0
+@set rt_opts=-q -d
 
-call "%~dp0..\..\PCbuild\rt.bat" -d -q -uall -rwW -n --timeout=3600 %*
+:CheckOpts
+@if '%1'=='-x64' (set rt_opts=%rt_opts% %1) & shift & goto CheckOpts
+@if '%1'=='-d' (set rt_opts=%rt_opts% %1) & shift & goto CheckOpts
+@if '%1'=='-O' (set rt_opts=%rt_opts% %1) & shift & goto CheckOpts
+@if '%1'=='-q' (set rt_opts=%rt_opts% %1) & shift & goto CheckOpts
+@if '%1'=='+d' (set rt_opts=%rt_opts:-d=%) & shift & goto CheckOpts
+@if '%1'=='+q' (set rt_opts=%rt_opts:-q=%) & shift & goto CheckOpts
+
+call "%here%..\..\PCbuild\rt.bat" %rt_opts% -uall -rwW -n --timeout=3600 %1 %2 %3 %4 %5 %6 %7 %8 %9