On Fri, Dec 23, 2011 at 10:11 PM, Dave Hart <daveh...@gmail.com> wrote: > Another monkey wrench is gcc and Visual C++ have different models for > how PCH is implemented. Support in Automake would ideally target both
Have they? AFAIK they're equivalent. > by finding a compatible subset. I'm sure there are existing > open-source models that demonstrate how to use both gcc and VC > precompiled headers. As I recall, gcc support is a bit more generic > but involves a separate PCH invocation to "compile" the headers, while > VC++ requires precomp.h be the first item included in each > participating file but doesn't require a separate compiler invocation > -- the first one that can use the precomp.pch generates it. Both have a step to generate the PCH. VC builds stdafx.h via stdafx.cpp, GCC builds a header file directly. Both basically require the header to be the first include for PCH to be usable. -- Olaf
