VS10: Fix working directory of consecutive custom commands (#11938)

The VS 10 msbuild tool uses a single command shell to invoke all the
custom command scripts in a project.  Isolate the environment and
working directory of custom commands using setlocal/endlocal.  The
form of each command is

  set errlev=
  setlocal
  cd c:\work\dir
  if %errorlevel% neq 0 goto :cmEnd
  c:
  if %errorlevel% neq 0 goto :cmEnd
  command1 ...
  if %errorlevel% neq 0 goto :cmEnd
  ...
  commandN ...
  if %errorlevel% neq 0 goto :cmEnd
  :cmEnd
  endlocal & set errlev=%errorlevel%
  if %errlev% neq 0 goto :VCEnd

so that all changes to the environment and working directory are
isolated within the script and the return code is preserved.

1 files changed, 2 insertions, 2 deletions

diff --git a/Source/cmLocalVisualStudio10Generator.cxx b/Source/cmLocalVisualStudio10Generator.cxx
index de2a837..1850c16 100644
--- a/Source/cmLocalVisualStudio10Generator.cxx
+++ b/Source/cmLocalVisualStudio10Generator.cxx
@@ -119,7 +119,7 @@ void cmLocalVisualStudio10Generator
 }
 
 //----------------------------------------------------------------------------
-std::string cmLocalVisualStudio10Generator::CheckForErrorLine()
+const char* cmLocalVisualStudio10Generator::ReportErrorLabel() const
 {
-  return "if errorlevel 1 goto :VCEnd";
+  return ":VCEnd";
 }