Unable to compile on windows with MinGW from scoop

[paperjack93]

Godot version: bcbd480

OS/device including version: Windows 10

Issue description:
I cloned the project in C:/godot
I installed scoop and ran scoop install gcc python scons yasm make in my powershell
then I cd c:/godot in the folder and run scons platform=windows verbose=yes use_mingw=yes arch=x64
I receive the following error:

PS C:\godot> scons platform=windows verbose=yes use_mingw=yes arch=x64
scons: Reading SConscript files ...
Configuring for Windows: target=debug, bits=default
Using MinGW
Checking for C header file mntent.h... no
scons: done reading SConscript files.
scons: Building targets ...
[Initial build] g++ -o platform\windows\godot_windows.windows.tools.x64.o -c -std=gnu++17 -g3 -mwindows -Wall -Wshadow-local -Wno-misleading-indentation -Werror=return-type -DDEBUG_MEMORY_ALLOC -DDISABLE_FORCED_INLINE -DDEBUG_ENABLED -DWINDOWS_SUBSYSTEM_CONSOLE -DWINDOWS_ENABLED -DWASAPI_ENABLED -DWINMIDI_ENABLED -DWINVER=0x0601 -D_WIN32_WINNT=0x0601 -DVULKAN_ENABLED -DMINGW_ENABLED -DMINGW_HAS_SECURE_API=1 -DTOOLS_ENABLED -DMINIZIP_ENABLED -DZSTD_STATIC_LINKING_ONLY -Ithirdparty\freetype\include -Ithirdparty\libpng -Ithirdparty\vulkan -Ithirdparty\vulkan\include -Ithirdparty\vulkan\loader -Ithirdparty\zstd -Ithirdparty\zlib -Iplatform\windows -I. platform\windows\godot_windows.cpp
=====
b''
=====
scons: *** [platform\windows\godot_windows.windows.tools.x64.o] Error 1
scons: building terminated because of errors.

I tried looking up information but I couldn't find anything. The error seems to be related to a char in godot_windows.cpp

[akien-mga]

arch is not a valid argument for Windows, it's only used by macOS and iOS configs.
For Windows you should use bits=32 or bits=64 to pick x86 or x86_64.

I don't know if that's what causes your issue though.

[paperjack93]

@akien-mga same error

PS C:\godot> scons platform=windows verbose=yes use_mingw=yes bits=64
scons: Reading SConscript files ...
Configuring for Windows: target=debug, bits=64
Using MinGW
Checking for C header file mntent.h... (cached) no
scons: done reading SConscript files.
scons: Building targets ...
[Initial build] g++ -o platform\windows\godot_windows.windows.tools.64.o -c -std=gnu++17 -g3 -mwindows -Wall -Wshadow-local -Wno-misleading-indentation -Werror=return-type -DDEBUG_MEMORY_ALLOC -DDISABLE_FORCED_INLINE -DDEBUG_ENABLED -DWINDOWS_SUBSYSTEM_CONSOLE -DWINDOWS_ENABLED -DWASAPI_ENABLED -DWINMIDI_ENABLED -DWINVER=0x0601 -D_WIN32_WINNT=0x0601 -DVULKAN_ENABLED -DMINGW_ENABLED -DMINGW_HAS_SECURE_API=1 -DTOOLS_ENABLED -DMINIZIP_ENABLED -DZSTD_STATIC_LINKING_ONLY -Ithirdparty\freetype\include -Ithirdparty\libpng -Ithirdparty\vulkan -Ithirdparty\vulkan\include -Ithirdparty\vulkan\loader -Ithirdparty\zstd -Ithirdparty\zlib -Iplatform\windows -I. platform\windows\godot_windows.cpp
=====
b''
=====
scons: *** [platform\windows\godot_windows.windows.tools.64.o] Error 1
scons: building terminated because of errors.```

[akien-mga]

What's the output of scons --version?

[paperjack93]

@akien-mga

SCons by Steven Knight et al.:
        SCons: v4.1.0.215860fd4f6bea67896c145660a035fad20cc41c, 2021-01-19 20:03:01, by bdbaddog on ProDog2020
        SCons path: ['C:\\Users\\User\\scoop\\apps\\scons\\4.1.0\\scons-local-4.1.0\\SCons']
Copyright (c) 2001 - 2021 The SCons Foundation```

[akien-mga]

Then I have no clue what this b'' error is or comes from. The logs don't say much :(

[Zireael07]

b'' to me looks like empty Python bytes object - what version of Python are you on @paperjack93 ? Might be some 2 vs 3 incompatibility...

[paperjack93]

@Zireael07

python --version
Python 3.9.5

[GeorgeS2019]

@Zireael07 setup a virtualenv for python and try again and use older python e.g. python 3.7, as the build script is more often tested with non 3.9 version python

[paperjack93]

@Zireael07 setup a virtualenv for python and try again and use older python e.g. py0thon 3.7, as the build script is more often tested with non 3.9 version python

I tried with python 3.7.2 and it gives same error

[GeorgeS2019]

@Zireael07 Do u use virtualenv? I use VisualStudio2019 c++ building on regular basis
Your scon path is outside a virtualenv

I did not follow this step
scoop install gcc python scons yasm make

[paperjack93]

I don't use visualstudio or virtualenv @GeorgeS2019

[akien-mga]

@GeorgeS2019 This issue is about compiling with MinGW-GCC from scoop's distribution, Visual Studio is a completely different compiler so it's not relevant to this issue.

[Calinou]

As a workaround, you can install llvm-mingw, add its bin folders to your user's PATH environment variable, open a new command prompt (or reboot if you added it to your system PATH), and compile with scons use_mingw=yes use_llvm=yes use_lld=yes.

I think there are 2 folders to add in your PATH with llvm-mingw, but I can't check right now.

[paperjack93]

@Calinou do I have to remove the mingw from scoop ?

[paperjack93]

@Calinou I tried it and the error changed:

PS C:\godot> scons platform=windows verbose=yes use_mingw=yes bits=64
scons: Reading SConscript files ...
Configuring for Windows: target=debug, bits=64
Using MinGW
YASM is necessary for WebM SIMD optimizations.
WebM SIMD optimizations are disabled. Check if your CPU architecture, CPU bits or platform are supported!
Checking for C header file mntent.h... (cached) no
scons: done reading SConscript files.
scons: Building targets ...
[Initial build] gcc-ar q main\libmain.windows.tools.64.a main\main.windows.tools.64.o main\main_timer_sync.windows.tools.64.o main\performance.windows.tools.64.o
scons: *** [main\libmain.windows.tools.64.a] The system cannot find the file specified
scons: building terminated because of errors.
PS C:\godot>

[Xrayez]

@paperjack93 don't forget to add use_llvm=yes along with use_mingw=yes. Otherwise, it fails to find needed tools according to above log.

[Calinou]

@Calinou do I have to remove the mingw from scoop ?

You don't have to, but you have to make sure llvm-mingw is above the MinGW Scoop paths in the PATH editor.

Still, you can try removing it as a last resort with scoop uninstall gcc.

[paperjack93]

@Calinou I managed to compile successfully thanks to your workaround
@Xrayez thank you for the info! The use_llvm=yes was missing.
The problem with the scoop b'' remains, though.