I use Qt for C++ development, and today I produced a .vcproj file from a .pro file.
I noticed under the vcproj project properties, Qt added this flag into the C/C++ -> Command Line -> Additional Options
-Zm200
What is -Zm200?
-Zm is Specify Precompiled Header Memory Limit (more info here). It limits the amount of memory the compiler can allocate for processing precompiled headers. For Visual C++ 2008, -Zm200 means limit to 150 MB.