Tweaks to build-all scripts

build-all.ps1

@@ -4,7 +4,6 @@
 
 # Setting PYTHONIOENCODING avoids an obscure crash related to code page mismatch
 $env:PYTHONIOENCODING="utf-8"
-$envsave = $env:PLATFORMIO_BUILD_FLAGS
 
 Function BuildMachine($names) {
     $basename = $names[0]
@@ -30,5 +29,4 @@ $base="3axis_v4.h"
 foreach ($filepath in Get-ChildItem -file .\Grbl_Esp32\Machines\add_*) {
     BuildMachine($base, $filepath.name)
 }
-
-$env:PLATFORMIO_BUILD_FLAGS=$envsave
+Remove-Item env:PLATFORMIO_BUILD_FLAGS

clear-flags.ps1

@@ -0,0 +1,7 @@
+# Remove the override of PLATFORMIO_BUILD_FLAGS
+# This is useful if you were running build-all.ps1 and
+# had to kill it with Ctrl-C, thus leaving
+# PLATFORMIO_BUILD_FLAGS set to override the machine type.
+# A clear-flags.sh equivalent is unnecessary, as build-all.sh
+# does not set PLATFORMIO_BUILD_FLAGS globally
+Remove-Item Env:PLATFORMIO_BUILD_FLAGS