Re: windows build slow due to windows.h includes

Em ter., 21 de set. de 2021 às 16:30, Andres Freund <andres@anarazel.de>
escreveu:

> Hi,
>
> For the AIO stuff I needed to build postgres for windows. And I was a bit
> horrified by the long compile times. At first I was ready to blame the MS
> compiler for being slow, until I noticed that using mingw gcc from linux to
> cross compile to windows is also a *lot* slower than building for linux.
>
> I found some blog-post-documented-only compiler flags [1], most importantly
> /d1reportTime. Which shows that the include processing of postgres.h takes
> 0.6s [2]
>
> Basically all the time in a debug windows build is spent parsing windows.h
> and
> related headers. Argh.
>
> The amount of stuff we include in win32_port.h and declare is pretty absurd
> imo. There's really no need to expose the whole backend to all of it. Most
> of
> it should just be needed in a few port/ files and a few select users.
>
> But that's too much work for my taste. As it turns out there's a partial
> solution to windows.h being just so damn big, the delightfully named
> WIN32_LEAN_AND_MEAN.
>
+1
But I did a quick dirty test here, and removed windows.h in win32_port.h,
and compiled normally with msvc 2019 (64 bit), would it work with mingw
cross compile?

regards,
Ranier Vilela