Hi all,

I was able to build v8 (branch 4.8) on Windows 10 using Visual Studio 2015. 
I followed these instructions -
set DEPOT_TOOLS_WIN_TOOLCHAIN=0
set GYP_MSVS_VERSION=2015
set GYP_GENERATORS=msvs
wget https://storage.googleapis.com/chrome-infra/depot_tools.zip -OutFile 
depot_tools.zip
Expand-Archive .\depot_tools.zip -dest depot_tools

Set the path for depot tools using Control panel
fetch v8git checkout branch-heads/4.8
gclient sync
python.exe build\gyp_v8 -Dtarget_arch=x64

After generating the build files, it actually shows some warning messages 
asking us to manually delete some directories -
del v8\base\trace_event\common
del v8\third_party\instrumented_libraries
del v8\test\test262\harness
del v8\third_party\markupsafe
del v8\third_party\jinja2
del v8\test\wasm-js

>
>> Now open v8\build\all.sln in Visual Studio 2015 and build the whole 
solution. 


On Tuesday, 20 September 2016 13:34:15 UTC+5:30, Pieter wrote:

>
> I have been struggling for a couple of days to get the correct 
> incantations to get a build of v8 working on windows 10 with visual studio 
> 2015.
>
> In short the steps that i've been attempting are as follows
>
>    - set DEPOT_TOOLS_WIN_TOOLCHAIN=0
>    - set GYP_MSVS_VERSION=2015
>    - set GYP_GENERATORS=msvs-ninja,ninja
>    - Get depot tools from: wget 
>    https://storage.googleapis.com/chrome-infra/depot_tools.zip -OutFile 
>    depot_tools.zip
>    - Expand Archive: Expand-Archive .\depot_tools.zip -dest depot_tools
>    - Set the path for depot tools
>    - Checkout the v8 source code by running: fetch v8
>    - Change directory to /v8 and checkout 5.2: git checkout 
>    branch-heads/5.2
>    - Run sync so that all the dependencies are up to date with the 
>    branch: gclient sync
>    - To generate the project files run: third_party/python_26/python.exe 
>    build\gyp_v8 -Dtarget_arch=x64
>    - To build: : "c:\Program Files (x86)\Microsoft Visual Studio 
>    14.0\Common7\IDE\devenv.com" /build Release gypfiles\All.sln
>    
> I am running into all kinds of issues related with the build and after 
> running the last command it ends with
>
> The first occurrence of the error is 
>
> 1>  ninja -t msvc -e environment.x64 -- "C:\Program Files (x86)\Microsoft 
> Visual Studio 14.0\VC\bin\amd64\cl.exe" /nologo /showIncludes /FC @obj\
> third_party\icu\source\i18n\icui18n.collationkeys.obj.rsp /c..\..\
> third_party\icu\source\i18n\collationkeys.cpp /Foobj\third_party\icu\
> source\i18n\icui18n.collationkeys.obj /Fdobj\third_party\icu\icui18n.cc.
> pdb
> 1>C:\source\v8build\v8\third_party\icu\source\i18n\collationkeys.cpp : fatal 
> error C1083: Cannot open compiler generated file: 
> 'C:\source\v8build\v8\out\Release_x64\obj\third_party\icu\source\i18n\icui18n.collationkeys.obj'
> : Permission denied
>
> I am not sure why i'm getting a permission denied.
>
> the build then ends with
>
> 40>  ninja: build stopped: subcommand failed.
> 40>ninja : warning : premature end of file; recovering
> 40>C:\source\v8build\v8\test\fuzzer\wasm_fuzzer.vcxproj(334,5): error 
> MSB3073: The command "call ninja.exe -C ..\..\out\Release_x64\ 
> wasm_fuzzer" exited with code 1.
>
>  ..\..\out\Release_x64\ wasm_fuzzer" exited with code 1.
> ========== Build: 20 succeeded, 21 failed, 0 up-to-date, 0 skipped 
> ==========
>
>
> Any help would be much appreciated
>

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