Any clever way to launch a makefile in Visual Studio only if build succeeded?

We have a makefile that is built last in our build process using Visual Studio to launch our unit tests. Unfortunately if the build fails the makefile is still processed and we have extra (annoying) errors. Any way to prevent that?

Example Project A : build dummy.exe Project B (makefile) : build command is : run dummy.exe /unittest

We want Project B to skip its build command when Project A has build errors. Thanks!

From stackoverflow Enigme

• Go to Project Properties. I assume you already have something in the "Post-Build event command line" box? There is a "Run the post-build event" combobox, set it to "On successful build".

  Is that what you're looking for?

  Enigme : Unfortunately it's not a post-build, it's a makefile project

  xero : Is there a way to get your makefile to do nothing if the other project's output hasn't been updated in the last 20 seconds? It's a hack but might work.
  From xero

• Set Project B (your makefile project) to be dependant on Project A. This way Project B will always try to build Project A before it builds.

  Enigme : I had great hope for this simple solution but even with compiling 1 project at a time it still fails (makefile is launched)
  From Joseph Daigle