skia failed to follow build instructions

Question

I am trying to build skia on windows platform and I am following official skia buid guide. So what I have done till now:

• I downloaded visual studio 2019 with microsoft clang compiler via vs installer
• then I obtained depot_tools unzipped them and add to system PATH via control panel and using gclient command I confirmed that path was ok.
• then using git clone https://skia.googlesource.com/skia.git I got skia on my pc.

Having that done in skia dir I typed :

• python3 tools/git-sync-deps
• python3 bin/fetch-ninja

Ok now my questions. This command python3 tools/git-sync-deps has load a lot of things like like libpng, libwebp, or libjpeg-turbo. So what flags should I pass to GN to build skia? Where should I find these flags? Does microsoft clang compiler is the one that should I use to build skia.