VsDevCmd.bat appends to environment variables each time it is called, meaning that you eventually reach a point where you can no longer build. Adding SETLOCAL at the top of the batch file causes the changes from VsDevCmd.bat to be scoped to the lifetime of the batch file

2017-05-11 13:48:49 -07:00 · 2017-05-11 13:48:49 -07:00 · 5c6de9ee33
--- a/build-Win32Debug.bat
+++ b/build-Win32Debug.bat
@ -1,4 +1,5 @@
@echo off
+@setlocal ENABLEEXTENSIONS
 call "C:\Program Files (x86)\Microsoft Visual Studio 14.0\Common7\Tools\VsDevCmd.bat"

 echo ***************************************************************************************************
--- a/build-Win32Release.bat
+++ b/build-Win32Release.bat
@ -1,4 +1,5 @@
@echo off
+@setlocal ENABLEEXTENSIONS
 call "C:\Program Files (x86)\Microsoft Visual Studio 14.0\Common7\Tools\VsDevCmd.bat"

 echo ***************************************************************************************************
--- a/build-all.bat
+++ b/build-all.bat
@ -1,4 +1,5 @@
@echo off
+@setlocal ENABLEEXTENSIONS
 call "C:\Program Files (x86)\Microsoft Visual Studio 14.0\Common7\Tools\VsDevCmd.bat"

 echo ***************************************************************************************************
--- a/build-x64Debug.bat
+++ b/build-x64Debug.bat
@ -1,4 +1,5 @@
@echo off
+@setlocal ENABLEEXTENSIONS
 call "C:\Program Files (x86)\Microsoft Visual Studio 14.0\Common7\Tools\VsDevCmd.bat"

 echo ***************************************************************************************************
--- a/build-x64Release.bat
+++ b/build-x64Release.bat
@ -1,4 +1,5 @@
@echo off
+@setlocal ENABLEEXTENSIONS
 call "C:\Program Files (x86)\Microsoft Visual Studio 14.0\Common7\Tools\VsDevCmd.bat"

 echo ***************************************************************************************************