[lua:x64-mingw-dynamic] vcpkg-built lua.exe doesn't work

[vadi2]

Describe the bug
Running lua.exe (REPL) that's built by vcpkg produces no output.

Environment

• OS: Windows 10
• Compiler: MinGW-w64 8.1.0

To Reproduce
Steps to reproduce the behavior:

1. ./vcpkg install lua
2. run lua.exe

PS C:\Users\username\Desktop\lua> .\luac.exe -v
Lua 5.4.1  Copyright (C) 1994-2020 Lua.org, PUC-Rio
PS C:\Users\username\Desktop\lua> .\lua.exe -v
PS C:\Users\username\Desktop\lua>

Expected behavior
Something along the lines of, adjusting for the Lua version:

Lua 5.1.5  Copyright (C) 1994-2012 Lua.org, PUC-Rio

Additional information
luac.exe (compiler) works fine.

[PhoebeHui]

@vadi2, I can't repro this issue with vs2017 on windows.

F:\VCPKG\clean\installed\x86-windows\tools\lua>luac.exe -v
Lua 5.4.1  Copyright (C) 1994-2020 Lua.org, PUC-Rio

F:\VCPKG\clean\installed\x86-windows\tools\lua>lua.exe -v
Lua 5.4.1  Copyright (C) 1994-2020 Lua.org, PUC-Rio

[StarGate-One]

@vadi2, I can't repro this issue with vs2017 on windows.

F:\VCPKG\clean\installed\x86-windows\tools\lua>luac.exe -v
Lua 5.4.1  Copyright (C) 1994-2020 Lua.org, PUC-Rio

F:\VCPKG\clean\installed\x86-windows\tools\lua>lua.exe -v
Lua 5.4.1  Copyright (C) 1994-2020 Lua.org, PUC-Rio

I get the same results @PhoebeHui but using the 64-bit binary:

SYSTEM@ANDROMEDA 11/20/2020 12:45:00 D:\vcpkg_x64\vs2019\prod\installed\x64-windows\tools\lua
->lua.exe -v
Lua 5.4.1 Copyright (C) 1994-2020 Lua.org, PUC-Rio

SYSTEM@ANDROMEDA 11/20/2020 12:45:04 D:\vcpkg_x64\vs2019\prod\installed\x64-windows\tools\lua
->luac.exe -v
Lua 5.4.1 Copyright (C) 1994-2020 Lua.org, PUC-Rio

[vadi2]

Hm, weird. I wouldn't know what the issue is then off the top of my head.

[PhoebeHui]

It looks you copied the lua files to C:\Users\username\Desktop\lua, right? do you copy the lua.dll as well?

[PhoebeHui]

@vadi2, does this still be a problem for you?

[vadi2]

My Lua in installed/triplet/tools doesn't work, but it seems to work in other locations, check out this build log: https://github.com/vadi2/vcpkg-lua-reproduction/runs/1524389309?check_suite_focus=true

How did you get it to work in installed/triplet/tools? My build file to reproduce it is pretty simple: https://github.com/vadi2/vcpkg-lua-reproduction/actions/runs/410402181/workflow

[vadi2]

The above is the Lua 5.4.1 port that's in vcpkg. When I build my own 5.1.5 port, lua.exe is only installed in $env:GITHUB_WORKSPACE\vcpkg\installed\x64-mingw-dynamic\tools\lua and that is the one that does not work.

[PhoebeHui]

@vadi2, thanks for the information!

It might relate to mingw, I can't repro this issue with x64-windows triplet which built with vs2019 on win10.

Anyone who could help take a look?

[vadi2]

Are you certain? In the build setup where it does work, I install VCPKG_ROOT/vcpkg install lua:x64-mingw-dynamic. That should use mingw, right?

[PhoebeHui]

Since you configure with triplet x64-mingw-dynamic, it should use mingw.

It's weird, since when install the tools, it will install the lua.exe and lua.dll from vcpkg\buildtrees\lua\x64-mingw-dynamic-rel\ to ./vcpkg/package diretory, after everything checked, vcpkg will copy them from package directory to vcpkg\installed\x64-mingw-dynamic\tools\lua, that means the lua.exe file are same in both paths. However, one works, one doesn't, I suspect it might relate to the dependency, could you double confirm if the lua.dll copy to the installed directory as well?

[vadi2]

I appreciate your continued assistance in this 👍

lua.dll is not copied to the installed directory, and that was the problem like you've hinted. That is not done neither by my 5.1.5 port nor the vcpkg-native 5.4.1 port, as visible in this screenshot #14667 (comment).

Perhaps it's not copied because there's only support for msvc and clang copying dll's, but not mingw: #14525

I wonder why does the vcpkg 5.4.1 port populate the \buildtrees folder fully (with lua.exe and lua.dll, where it works) vs my 5.1.5 port which is just about the same but for an older version.

As a hacky workaround, I copied lua.dll into the same folder as lua.exe and that did work!

Copy-Item "$env:GITHUB_WORKSPACE\3rdparty\vcpkg\installed\x64-mingw-dynamic\bin\liblua.dll" `
    "$env:GITHUB_WORKSPACE\3rdparty\vcpkg\installed\x64-mingw-dynamic\tools\lua"
  . $env:GITHUB_WORKSPACE\3rdparty\vcpkg\installed\x64-mingw-dynamic\tools\lua\lua.exe -v
Lua 5.1.5  Copyright (C) 1994-2012 Lua.org, PUC-Rio

So I guess with the vcpkg-native 5.4.1 port, the only issue is: vcpkg\installed\x64-mingw-dynamic\tools\lua\lua.exe doesn't work, possibly because of #14525.

I'm OK with closing this issue as there's one tracking the source of the problem already.

[PhoebeHui]

Glad you got the issue solved！

Since we already have issue #14525 to track, close this issue now.