PRECOMPILED_INCLUDE
Use the PRECOMPILED_INCLUDE macro to specify the name of the precompiled header. For example, if you have precompiled headers that are a.c, b.c, and c.c as your source files, and all of them include precomp.h, specify:
PRECOMPILED_INCLUDE=precomp.h
If you omit this instruction, you will not be able to use precompiled headers. PRECOMPILED_INCLUDE sets the build process use precompiled headers.
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Build date: 5/3/2011