Can't build project under Windows (WSL1, WSL2, or pseudoenvironments)

[TheLogan]

I've been trying to build the project today and I get as far as running the make script (something I'm quite unfamiliar with), I've got everything I'm doing below, I'm using GIT Bash window in Windows 10

Logan@DESKTOP-ANBSM94 MINGW64 /c/Home automation
$ git clone --recurse-submodules https://github.com/j1nx/MycroftOS.git
Cloning into 'MycroftOS'...
remote: Enumerating objects: 425, done.
remote: Counting objects: 100% (425/425), done.
remote: Compressing objects: 100% (273/273), done.
remote: Total 7631 (delta 215), reused 313 (delta 133), pack-reused 7206
Receiving objects: 100% (7631/7631), 324.26 MiB | 25.27 MiB/s, done.
Resolving deltas: 100% (3529/3529), done.
Checking out files: 100% (1577/1577), done.
Submodule 'buildroot' (https://github.com/buildroot/buildroot.git) registered for path 'buildroot'
Cloning into 'C:/Home automation/MycroftOS/buildroot'...
remote: Enumerating objects: 270, done.
remote: Counting objects: 100% (270/270), done.
remote: Compressing objects: 100% (152/152), done.
remote: Total 405976 (delta 173), reused 188 (delta 118), pack-reused 405706
Receiving objects: 100% (405976/405976), 120.38 MiB | 13.06 MiB/s, done.
Resolving deltas: 100% (269821/269821), done.
Submodule path 'buildroot': checked out '6b8e73d6a1958fcf441d91338c64c73aadcc43e4'

Logan@DESKTOP-ANBSM94 MINGW64 /c/Home automation
$ cd MycroftOS/

Logan@DESKTOP-ANBSM94 MINGW64 /c/Home automation/MycroftOS (develop)
$ git checkout develop
Already on 'develop'
Your branch is up to date with 'origin/develop'.

Logan@DESKTOP-ANBSM94 MINGW64 /c/Home automation/MycroftOS (develop)
$ git submodule update --remote --merge
Updating 6b8e73d6a1..efca26a405
Fast-forward
 CHANGES                                            |  37 +++++
 Makefile                                           |   4 +-
 linux/linux.hash                                   |   4 +-
 .../binutils/{2.35.1 => 2.35.2}/0001-sh-conf.patch |   0
 .../0002-poison-system-directories.patch           |   0
 package/binutils/Config.in.host                    |   4 +-
 package/binutils/binutils.hash                     |   2 +-
 package/busybox/udhcpc.script                      |   2 +-
 package/dhcpcd/dhcpcd.mk                           |   1 +
 ...d-fix-Werror=format-overflow-under-gcc-10.patch | 162 +++++++++++++++++++++
 package/intel-mediadriver/intel-mediadriver.mk     |   6 +-
 package/linux-headers/Config.in.host               |   4 +-
 package/mutt/0002-CVE-2021-3181-1.patch            |  40 +++++
 package/mutt/0003-CVE-2021-3181-2.patch            |  53 +++++++
 package/mutt/0004-CVE-2021-3181-3.patch            |  30 ++++
 package/mutt/mutt.mk                               |   5 +
 package/privoxy/privoxy.hash                       |   8 +-
 package/privoxy/privoxy.mk                         |   2 +-
 package/pugixml/pugixml.hash                       |   4 +-
 package/pugixml/pugixml.mk                         |   4 +-
 package/python-django/python-django.hash           |   6 +-
 package/python-django/python-django.mk             |   4 +-
 package/socat/socat.hash                           |  10 +-
 package/socat/socat.mk                             |   2 +-
 ...arch-sh-Add-64-bit-time-types-from-kernel.patch |  33 +++++
 .../wireguard-linux-compat.hash                    |   4 +-
 .../wireguard-linux-compat.mk                      |   2 +-
 .../xserver_xorg-server/xserver_xorg-server.mk     |   3 +
 package/xenomai/Config.in                          |   6 +-
 support/dependencies/check-host-cmake.mk           |   5 +
 support/misc/Vagrantfile                           |   2 +-
 31 files changed, 409 insertions(+), 40 deletions(-)
 rename package/binutils/{2.35.1 => 2.35.2}/0001-sh-conf.patch (100%)
 rename package/binutils/{2.35.1 => 2.35.2}/0002-poison-system-directories.patch (100%)
 create mode 100644 package/intel-mediadriver/0002-build-fix-Werror=format-overflow-under-gcc-10.patch
 create mode 100644 package/mutt/0002-CVE-2021-3181-1.patch
 create mode 100644 package/mutt/0003-CVE-2021-3181-2.patch
 create mode 100644 package/mutt/0004-CVE-2021-3181-3.patch
 create mode 100644 package/uclibc/0001-arch-sh-Add-64-bit-time-types-from-kernel.patch
Submodule path 'buildroot': merged in 'efca26a4051372112c03c326642a74f2981639a3'

Logan@DESKTOP-ANBSM94 MINGW64 /c/Home automation/MycroftOS (develop)
$

Logan@DESKTOP-ANBSM94 MINGW64 /c/Home automation/MycroftOS (develop)
$ ./scripts/br-patches.sh
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Logan@DESKTOP-ANBSM94 MINGW64 /c/Home automation/MycroftOS (develop)
$ make clean
C:/Program Files (x86)/GnuWin32/bin/make -C buildroot BR2_EXTERNAL=../buildroot-external clean
/usr/bin/sh: -c: line 0: syntax error near unexpected token `('
/usr/bin/sh: -c: line 0: `C:/Program Files (x86)/GnuWin32/bin/make -C buildroot BR2_EXTERNAL=../buildroot-external clean'
make: *** [clean] Error 1

Logan@DESKTOP-ANBSM94 MINGW64 /c/Home automation/MycroftOS (develop)$ make
mkdir -p release
config rpi3_64-gui
C:/Program Files (x86)/GnuWin32/bin/make -C buildroot BR2_EXTERNAL=../buildroot-external "rpi3_64-gui_defconfig"
/usr/bin/sh: -c: line 0: syntax error near unexpected token `('
/usr/bin/sh: -c: line 0: `C:/Program Files (x86)/GnuWin32/bin/make -C buildroot BR2_EXTERNAL=../buildroot-external "rpi3_64-gui_defconfig"'
make: *** [rpi3_64-gui-config] Error 1

Logan@DESKTOP-ANBSM94 MINGW64 /c/Home automation/MycroftOS (develop)
$ make all
config rpi3_64-gui
C:/Program Files (x86)/GnuWin32/bin/make -C buildroot BR2_EXTERNAL=../buildroot-external "rpi3_64-gui_defconfig"
/usr/bin/sh: -c: line 0: syntax error near unexpected token `('
/usr/bin/sh: -c: line 0: `C:/Program Files (x86)/GnuWin32/bin/make -C buildroot BR2_EXTERNAL=../buildroot-external "rpi3_64-gui_defconfig"'
make: *** [rpi3_64-gui-config] Error 1

Logan@DESKTOP-ANBSM94 MINGW64 /c/Home automation/MycroftOS (develop)
$ make rpi3-config
make: *** No rule to make target `rpi3-config'.  Stop.

Logan@DESKTOP-ANBSM94 MINGW64 /c/Home automation/MycroftOS (develop)
$ make rpi3
make: *** No rule to make target `rpi3'.  Stop.

As you can see, fails in the make step, and I can't figure out why... any pointers?

[ChanceNCounter]

I'm inclined to suspect MinGW. It's certainly betrayed me in the past. I could be wrong, being unfamiliar with the build process, but I can't even find that open paren, so I'm guessing it's a binary's fault.

If you don't have access to a Linux system, I'd suggest trying it in WSL. WSL has betrayed me far less frequently.

[EVMakers]

https://github.com/OpenVoiceOS/OpenVoiceOS/issues/45

perhaps take a look here and try this device instead: make rpi4_64-gui
Pi 4 is the current development device from my understanding.

[j1nx]

Heuhm, guess I need to update the documentation a bit and remove the no longer used config files although I don't know if MinGW will work. Guess we will know sooner then later.

[TheLogan]

I discovered that there was also an issue of the path containing a space character, so I renamed "Home automation" to "HomeAutomation", deleted all files and started over, all with WSL, once I ran "make rpi4_64-gui I got this new error

root@DESKTOP-ANBSM94:/mnt/c/HomeAutomation/MycroftOS# make rpi4_64-gui
config rpi4_64-gui
make -C buildroot BR2_EXTERNAL=../buildroot-external "rpi4_64-gui_defconfig"
make[1]: Entering directory '/mnt/c/HomeAutomation/MycroftOS/buildroot'
/bin/bash: gcc: command not found
/bin/bash: line 0: [: : integer expression expected
mkdir -p /mnt/c/HomeAutomation/MycroftOS/buildroot/output/build/buildroot-config/lxdialog
PKG_CONFIG_PATH="" make CC="gcc" HOSTCC="gcc" \
    obj=/mnt/c/HomeAutomation/MycroftOS/buildroot/output/build/buildroot-config -C support/kconfig -f Makefile.br conf
make[2]: Entering directory '/mnt/c/HomeAutomation/MycroftOS/buildroot/support/kconfig'
gcc -DCURSES_LOC="<curses.h>" -DLOCALE -DKBUILD_NO_NLS -I/mnt/c/HomeAutomation/MycroftOS/buildroot/output/build/buildroot-config -DCONFIG_=\"\"  -MM *.c > /mnt/c/HomeAutomation/MycroftOS/buildroot/output/build/buildroot-config/.depend 2>/dev/null || :
gcc -DCURSES_LOC="<curses.h>" -DLOCALE -DKBUILD_NO_NLS -I/mnt/c/HomeAutomation/MycroftOS/buildroot/output/build/buildroot-config -DCONFIG_=\"\"   -c conf.c -o /mnt/c/HomeAutomation/MycroftOS/buildroot/output/build/buildroot-config/conf.o
/bin/sh: 1: gcc: not found
Makefile.br:34: recipe for target '/mnt/c/HomeAutomation/MycroftOS/buildroot/output/build/buildroot-config/conf.o' failed
make[2]: *** [/mnt/c/HomeAutomation/MycroftOS/buildroot/output/build/buildroot-config/conf.o] Error 127
make[2]: Leaving directory '/mnt/c/HomeAutomation/MycroftOS/buildroot/support/kconfig'
Makefile:968: recipe for target '/mnt/c/HomeAutomation/MycroftOS/buildroot/output/build/buildroot-config/conf' failed
make[1]: *** [/mnt/c/HomeAutomation/MycroftOS/buildroot/output/build/buildroot-config/conf] Error 2
make[1]: Leaving directory '/mnt/c/HomeAutomation/MycroftOS/buildroot'
Makefile:20: recipe for target 'rpi4_64-gui-config' failed
make: *** [rpi4_64-gui-config] Error 2

So I ran apt install gcc, it gave me a bunch of 404 errors, discovered that I needed to update my libraries or some such, ran sudo apt update, then installed gcc and finally ran make again, this time I'm being told I need to install g++, unzip and bc, so I'll go ahead and do that now xD

[TheLogan]

It ran for a long while this time but it ended with an error, and it seems to be this line:
mv: cannot stat '/mnt/c/HomeAutomation/MycroftOS/buildroot/output/build/glibc-2.31-74-gd0c84d22b6a67f85a1eed3b93aef30e6953294b5/build/dlfcn/stamp.oST': No such file or directory

The log is too large to post here xD

[TheLogan]

Any eta on the documentation? (or a new release)

[j1nx]

The README has been updated. Can you check if you start from scratch if it guides you through it?

[TheLogan]

I'll try it after work :)

[TheLogan]

Dangit, I'd written up the results of my test (it didn't work, in fact all 3 of the make commands failed), but I must have forgotten to click the "comment" button cause I can't seem to find the comment on this thread of any of the other ones.
I'll redo the run tomorrow when I get back to my computer!

[TheLogan]

So this is make clean:

root@DESKTOP-ANBSM94:/mnt/c/HomeAutomation/OpenVoiceOS# make clean
make -C buildroot BR2_EXTERNAL=../buildroot-external clean
make[1]: Entering directory '/mnt/c/HomeAutomation/OpenVoiceOS/buildroot'
/mnt/c/HomeAutomation/OpenVoiceOS/buildroot/support/scripts/setlocalversion: 11: /mnt/c/HomeAutomation/OpenVoiceOS/build: not foundt/scripts/setlocalversion:
/mnt/c/HomeAutomation/OpenVoiceOS/buildroot/support/scripts/setlocalversion: 14: /mnt/c/HomeAutomation/OpenVoiceOS/buildroot/support/scripts/setlocalversion: Syntax error: Bad fd number
: invalid optionbr2-external: line 2: set: -
set: usage: set [-abefhkmnptuvxBCHP] [-o option-name] [--] [arg ...]
support/scripts/br2-external: line 3: $'\r': command not found
support/scripts/br2-external: line 7: $'\r': command not found
': not a valid identifiernal: line 9: declare: `BR2_EXT_NAMES
support/scripts/br2-external: line 10: $'\r': command not found
support/scripts/br2-external: line 14: $'\r': command not found
support/scripts/br2-external: line 15: syntax error near unexpected token `$'{\r''
'upport/scripts/br2-external: line 15: `main() {
Makefile:192: /mnt/c/HomeAutomation/OpenVoiceOS/buildroot/output/.br2-external.mk: No such file or directory
rm -rf /mnt/c/HomeAutomation/OpenVoiceOS/buildroot/output/target /mnt/c/HomeAutomation/OpenVoiceOS/buildroot/output/images /mnt/c/HomeAutomation/OpenVoiceOS/buildroot/output/host  \
        /mnt/c/HomeAutomation/OpenVoiceOS/buildroot/output/build /mnt/c/HomeAutomation/OpenVoiceOS/buildroot/output/staging \
        /mnt/c/HomeAutomation/OpenVoiceOS/buildroot/output/legal-info /mnt/c/HomeAutomation/OpenVoiceOS/buildroot/output/graphs /mnt/c/HomeAutomation/OpenVoiceOS/buildroot/output/per-package
make[1]: Leaving directory '/mnt/c/HomeAutomation/OpenVoiceOS/buildroot'

This is make rpi4_64-gui-config

root@DESKTOP-ANBSM94:/mnt/c/HomeAutomation/OpenVoiceOS# make rpi4_64-gui-config
config rpi4_64-gui
make -C buildroot BR2_EXTERNAL=../buildroot-external "rpi4_64-gui_defconfig"
make[1]: Entering directory '/mnt/c/HomeAutomation/OpenVoiceOS/buildroot'
/mnt/c/HomeAutomation/OpenVoiceOS/buildroot/support/scripts/setlocalversion: 11: /mnt/c/HomeAutomation/OpenVoiceOS/build: not foundt/scripts/setlocalversion:
/mnt/c/HomeAutomation/OpenVoiceOS/buildroot/support/scripts/setlocalversion: 14: /mnt/c/HomeAutomation/OpenVoiceOS/buildroot/support/scripts/setlocalversion: Syntax error: Bad fd number
: invalid optionbr2-external: line 2: set: -
set: usage: set [-abefhkmnptuvxBCHP] [-o option-name] [--] [arg ...]
support/scripts/br2-external: line 3: $'\r': command not found
support/scripts/br2-external: line 7: $'\r': command not found
': not a valid identifiernal: line 9: declare: `BR2_EXT_NAMES
support/scripts/br2-external: line 10: $'\r': command not found
support/scripts/br2-external: line 14: $'\r': command not found
support/scripts/br2-external: line 15: syntax error near unexpected token `$'{\r''
'upport/scripts/br2-external: line 15: `main() {
Makefile:192: /mnt/c/HomeAutomation/OpenVoiceOS/buildroot/output/.br2-external.mk: No such file or directory
make[1]: *** No rule to make target 'rpi4_64-gui_defconfig'.  Stop.
make[1]: Leaving directory '/mnt/c/HomeAutomation/OpenVoiceOS/buildroot'
Makefile:20: recipe for target 'rpi4_64-gui-config' failed
make: *** [rpi4_64-gui-config] Error 2

And finally this is make rpi4_64-gui

root@DESKTOP-ANBSM94:/mnt/c/HomeAutomation/OpenVoiceOS# make rpi4_64-gui
config rpi4_64-gui
make -C buildroot BR2_EXTERNAL=../buildroot-external "rpi4_64-gui_defconfig"
make[1]: Entering directory '/mnt/c/HomeAutomation/OpenVoiceOS/buildroot'
/mnt/c/HomeAutomation/OpenVoiceOS/buildroot/support/scripts/setlocalversion: 11: /mnt/c/HomeAutomation/OpenVoiceOS/build: not foundt/scripts/setlocalversion:
/mnt/c/HomeAutomation/OpenVoiceOS/buildroot/support/scripts/setlocalversion: 14: /mnt/c/HomeAutomation/OpenVoiceOS/buildroot/support/scripts/setlocalversion: Syntax error: Bad fd number
: invalid optionbr2-external: line 2: set: -
set: usage: set [-abefhkmnptuvxBCHP] [-o option-name] [--] [arg ...]
support/scripts/br2-external: line 3: $'\r': command not found
support/scripts/br2-external: line 7: $'\r': command not found
': not a valid identifiernal: line 9: declare: `BR2_EXT_NAMES
support/scripts/br2-external: line 10: $'\r': command not found
support/scripts/br2-external: line 14: $'\r': command not found
support/scripts/br2-external: line 15: syntax error near unexpected token `$'{\r''
'upport/scripts/br2-external: line 15: `main() {
Makefile:192: /mnt/c/HomeAutomation/OpenVoiceOS/buildroot/output/.br2-external.mk: No such file or directory
make[1]: *** No rule to make target 'rpi4_64-gui_defconfig'.  Stop.
make[1]: Leaving directory '/mnt/c/HomeAutomation/OpenVoiceOS/buildroot'
Makefile:20: recipe for target 'rpi4_64-gui-config' failed
make: *** [rpi4_64-gui-config] Error 2

[j1nx]

All looks like linux / windows and of line character non-sense, so guess we can confirm WSL is not supported. If you do not have access to a physical linux machine, I recommend to setup a virtual machine.

[TheLogan]

I googled around a bit and discovered a solution. It turns out that

1. I was using WSL 1, there's a version 2 now, and
2. that there's a settings file I had to create here: /etc/wsl.conf
   I added the following to it

[interop]
enabled=false # enable launch of windows binaries; default is true
appendWindowsPath=false # append windows path to $PATH variable; default is true

And then went through the process again, this time it didn't change the line endings :)
I don't think it succeeded as my release as the final make command ends with 1 error, but I'd say I am a lot further this time around :)

I've appended the entirety of the output below:

root@DESKTOP-ANBSM94:/mnt/c/HomeAutomation/OpenVoiceOS# make clean
make -C buildroot BR2_EXTERNAL=../buildroot-external clean
make[1]: Entering directory '/mnt/c/HomeAutomation/OpenVoiceOS/buildroot'
make[1]: Warning: File '/mnt/c/HomeAutomation/OpenVoiceOS/buildroot/output/.br2-external.mk' has modification time 0.29 s in the future
rm -rf /mnt/c/HomeAutomation/OpenVoiceOS/buildroot/output/target /mnt/c/HomeAutomation/OpenVoiceOS/buildroot/output/images /mnt/c/HomeAutomation/OpenVoiceOS/buildroot/output/host  \
        /mnt/c/HomeAutomation/OpenVoiceOS/buildroot/output/build /mnt/c/HomeAutomation/OpenVoiceOS/buildroot/output/staging \
        /mnt/c/HomeAutomation/OpenVoiceOS/buildroot/output/legal-info /mnt/c/HomeAutomation/OpenVoiceOS/buildroot/output/graphs /mnt/c/HomeAutomation/OpenVoiceOS/buildroot/output/per-package
make[1]: warning:  Clock skew detected.  Your build may be incomplete.
make[1]: Leaving directory '/mnt/c/HomeAutomation/OpenVoiceOS/buildroot'
root@DESKTOP-ANBSM94:/mnt/c/HomeAutomation/OpenVoiceOS# make rpi4_64-gui-config
config rpi4_64-gui
make -C buildroot BR2_EXTERNAL=../buildroot-external "rpi4_64-gui_defconfig"
make[1]: Entering directory '/mnt/c/HomeAutomation/OpenVoiceOS/buildroot'
make[1]: Warning: File '/mnt/c/HomeAutomation/OpenVoiceOS/buildroot/output/.br2-external.mk' has modification time 0.29 s in the future
mkdir -p /mnt/c/HomeAutomation/OpenVoiceOS/buildroot/output/build/buildroot-config/lxdialog
PKG_CONFIG_PATH="" make CC="/usr/bin/gcc" HOSTCC="/usr/bin/gcc" \
    obj=/mnt/c/HomeAutomation/OpenVoiceOS/buildroot/output/build/buildroot-config -C support/kconfig -f Makefile.br conf
make[2]: Entering directory '/mnt/c/HomeAutomation/OpenVoiceOS/buildroot/support/kconfig'
/usr/bin/gcc -DCURSES_LOC="<curses.h>" -DLOCALE  -I/mnt/c/HomeAutomation/OpenVoiceOS/buildroot/output/build/buildroot-config -DCONFIG_=\"\"  -MM *.c > /mnt/c/HomeAutomation/OpenVoiceOS/buildroot/output/build/buildroot-config/.depend 2>/dev/null || :
make[2]: Warning: File '/mnt/c/HomeAutomation/OpenVoiceOS/buildroot/output/build/buildroot-config/.depend' has modification time 0.38 s in the future
/usr/bin/gcc -DCURSES_LOC="<curses.h>" -DLOCALE  -I/mnt/c/HomeAutomation/OpenVoiceOS/buildroot/output/build/buildroot-config -DCONFIG_=\"\"   -c conf.c -o /mnt/c/HomeAutomation/OpenVoiceOS/buildroot/output/build/buildroot-config/conf.o
/usr/bin/gcc -DCURSES_LOC="<curses.h>" -DLOCALE  -I/mnt/c/HomeAutomation/OpenVoiceOS/buildroot/output/build/buildroot-config -DCONFIG_=\"\"  -I. -c /mnt/c/HomeAutomation/OpenVoiceOS/buildroot/output/build/buildroot-config/zconf.tab.c -o /mnt/c/HomeAutomation/OpenVoiceOS/buildroot/output/build/buildroot-config/zconf.tab.o
In file included from /mnt/c/HomeAutomation/OpenVoiceOS/buildroot/output/build/buildroot-config/zconf.tab.c:2484:
./util.c: In function ‘file_write_dep’:
./util.c:54:18: warning: ‘..config.tmp’ directive writing 12 bytes into a region of size between 1 and 4097 [-Wformat-overflow=]
   54 |  sprintf(buf, "%s..config.tmp", dir);
      |                  ^~~~~~~~~~~~
./util.c:54:2: note: ‘sprintf’ output between 13 and 4109 bytes into a destination of size 4097
   54 |  sprintf(buf, "%s..config.tmp", dir);
      |  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /mnt/c/HomeAutomation/OpenVoiceOS/buildroot/output/build/buildroot-config/zconf.tab.c:2485:
./confdata.c: In function ‘conf_write’:
./confdata.c:778:23: warning: ‘.tmpconfig.’ directive writing 11 bytes into a region of size between 1 and 4097 [-Wformat-overflow=]
  778 |   sprintf(tmpname, "%s.tmpconfig.%d", dirname, (int)getpid());
      |                       ^~~~~~~~~~~
./confdata.c:778:3: note: ‘sprintf’ output between 13 and 4119 bytes into a destination of size 4097
  778 |   sprintf(tmpname, "%s.tmpconfig.%d", dirname, (int)getpid());
      |   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
./confdata.c: In function ‘conf_write_autoconf’:
./confdata.c:989:18: warning: ‘.config.cmd’ directive writing 11 bytes into a region of size between 1 and 4097 [-Wformat-overflow=]
  989 |  sprintf(buf, "%s.config.cmd", dir);
      |                  ^~~~~~~~~~~
./confdata.c:989:2: note: ‘sprintf’ output between 12 and 4108 bytes into a destination of size 4097
  989 |  sprintf(buf, "%s.config.cmd", dir);
      |  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
./confdata.c:995:18: warning: ‘.tmpconfig’ directive writing 10 bytes into a region of size between 1 and 4097 [-Wformat-overflow=]
  995 |  sprintf(buf, "%s.tmpconfig", dir);
      |                  ^~~~~~~~~~
./confdata.c:995:2: note: ‘sprintf’ output between 11 and 4107 bytes into a destination of size 4097
  995 |  sprintf(buf, "%s.tmpconfig", dir);
      |  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
./confdata.c:1000:18: warning: ‘.tmpconfig_tristate’ directive writing 19 bytes into a region of size between 1 and 4097 [-Wformat-overflow=]
 1000 |  sprintf(buf, "%s.tmpconfig_tristate", dir);
      |                  ^~~~~~~~~~~~~~~~~~~
./confdata.c:1000:2: note: ‘sprintf’ output between 20 and 4116 bytes into a destination of size 4097
 1000 |  sprintf(buf, "%s.tmpconfig_tristate", dir);
      |  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
./confdata.c:1007:18: warning: ‘.tmpconfig.h’ directive writing 12 bytes into a region of size between 1 and 4097 [-Wformat-overflow=]
 1007 |  sprintf(buf, "%s.tmpconfig.h", dir);
      |                  ^~~~~~~~~~~~
./confdata.c:1007:2: note: ‘sprintf’ output between 13 and 4109 bytes into a destination of size 4097
 1007 |  sprintf(buf, "%s.tmpconfig.h", dir);
      |  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
./confdata.c:1040:18: warning: ‘.tmpconfig.h’ directive writing 12 bytes into a region of size between 1 and 4097 [-Wformat-overflow=]
 1040 |  sprintf(buf, "%s.tmpconfig.h", dir);
      |                  ^~~~~~~~~~~~
./confdata.c:1040:2: note: ‘sprintf’ output between 13 and 4109 bytes into a destination of size 4097
 1040 |  sprintf(buf, "%s.tmpconfig.h", dir);
      |  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
./confdata.c:1046:18: warning: ‘.tmpconfig_tristate’ directive writing 19 bytes into a region of size between 1 and 4097 [-Wformat-overflow=]
 1046 |  sprintf(buf, "%s.tmpconfig_tristate", dir);
      |                  ^~~~~~~~~~~~~~~~~~~
./confdata.c:1046:2: note: ‘sprintf’ output between 20 and 4116 bytes into a destination of size 4097
 1046 |  sprintf(buf, "%s.tmpconfig_tristate", dir);
      |  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
./confdata.c:1054:18: warning: ‘.tmpconfig’ directive writing 10 bytes into a region of size between 1 and 4097 [-Wformat-overflow=]
 1054 |  sprintf(buf, "%s.tmpconfig", dir);
      |                  ^~~~~~~~~~
./confdata.c:1054:2: note: ‘sprintf’ output between 11 and 4107 bytes into a destination of size 4097
 1054 |  sprintf(buf, "%s.tmpconfig", dir);
      |  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/bin/gcc -DCURSES_LOC="<curses.h>" -DLOCALE  -I/mnt/c/HomeAutomation/OpenVoiceOS/buildroot/output/build/buildroot-config -DCONFIG_=\"\"   /mnt/c/HomeAutomation/OpenVoiceOS/buildroot/output/build/buildroot-config/conf.o /mnt/c/HomeAutomation/OpenVoiceOS/buildroot/output/build/buildroot-config/zconf.tab.o  -o /mnt/c/HomeAutomation/OpenVoiceOS/buildroot/output/build/buildroot-config/conf
make[2]: warning:  Clock skew detected.  Your build may be incomplete.
rm /mnt/c/HomeAutomation/OpenVoiceOS/buildroot/output/build/buildroot-config/zconf.tab.c
make[2]: Leaving directory '/mnt/c/HomeAutomation/OpenVoiceOS/buildroot/support/kconfig'
#
# configuration written to /mnt/c/HomeAutomation/OpenVoiceOS/buildroot/.config
#
make[1]: warning:  Clock skew detected.  Your build may be incomplete.
make[1]: Leaving directory '/mnt/c/HomeAutomation/OpenVoiceOS/buildroot'
root@DESKTOP-ANBSM94:/mnt/c/HomeAutomation/OpenVoiceOS# make rpi4_64-gui
config rpi4_64-gui
make -C buildroot BR2_EXTERNAL=../buildroot-external "rpi4_64-gui_defconfig"
make[1]: Entering directory '/mnt/c/HomeAutomation/OpenVoiceOS/buildroot'
make[1]: Warning: File '/mnt/c/HomeAutomation/OpenVoiceOS/buildroot/output/.br2-external.mk' has modification time 0.29 s in the future
#
# configuration written to /mnt/c/HomeAutomation/OpenVoiceOS/buildroot/.config
#
make[1]: warning:  Clock skew detected.  Your build may be incomplete.
make[1]: Leaving directory '/mnt/c/HomeAutomation/OpenVoiceOS/buildroot'
build rpi4_64-gui
make -C buildroot BR2_EXTERNAL=../buildroot-external 2>&1 | tee logs/buildroot_rpi4_64-gui_output.txt
make[1]: Entering directory '/mnt/c/HomeAutomation/OpenVoiceOS/buildroot'
/usr/bin/make -j1 O=/mnt/c/HomeAutomation/OpenVoiceOS/buildroot/output HOSTCC="/usr/bin/gcc" HOSTCXX="g++" syncconfig
make[2]: Entering directory '/mnt/c/HomeAutomation/OpenVoiceOS/buildroot'
make[2]: Warning: File '/mnt/c/HomeAutomation/OpenVoiceOS/buildroot/output/.br2-external.mk' has modification time 0.29 s in the future
make[2]: warning:  Clock skew detected.  Your build may be incomplete.
make[2]: Leaving directory '/mnt/c/HomeAutomation/OpenVoiceOS/buildroot'

You may have to install 'g++' on your build machine
>>> host-skeleton  Extracting
>>> host-skeleton  Patching
>>> host-skeleton  Configuring
>>> host-skeleton  Building
>>> host-skeleton  Installing to host directory
>>> host-ccache 3.7.12 Downloading
--2021-05-12 15:34:04--  https://github.com/ccache/ccache/releases/download/v3.7.12/ccache-3.7.12.tar.xz
Resolving github.com (github.com)... 140.82.121.4
Connecting to github.com (github.com)|140.82.121.4|:443... connected.
HTTP request sent, awaiting response... 302 Found
Location: https://github-releases.githubusercontent.com/461102/c2cb3b80-03f2-11eb-9ea7-b9841092a0dc?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=AKIAIWNJYAX4CSVEH53A%2F20210512%2Fus-east-1%2Fs3%2Faws4_request&X-Amz-Date=20210512T133404Z&X-Amz-Expires=300&X-Amz-Signature=b27cc2cf4ce9c5eccea55110a9d8ad2fbd2ce681c8618f21746857542e2b124b&X-Amz-SignedHeaders=host&actor_id=0&key_id=0&repo_id=461102&response-content-disposition=attachment%3B%20filename%3Dccache-3.7.12.tar.xz&response-content-type=application%2Foctet-stream [following]
--2021-05-12 15:34:04--  https://github-releases.githubusercontent.com/461102/c2cb3b80-03f2-11eb-9ea7-b9841092a0dc?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=AKIAIWNJYAX4CSVEH53A%2F20210512%2Fus-east-1%2Fs3%2Faws4_request&X-Amz-Date=20210512T133404Z&X-Amz-Expires=300&X-Amz-Signature=b27cc2cf4ce9c5eccea55110a9d8ad2fbd2ce681c8618f21746857542e2b124b&X-Amz-SignedHeaders=host&actor_id=0&key_id=0&repo_id=461102&response-content-disposition=attachment%3B%20filename%3Dccache-3.7.12.tar.xz&response-content-type=application%2Foctet-stream
Resolving github-releases.githubusercontent.com (github-releases.githubusercontent.com)... 185.199.110.154, 185.199.111.154, 185.199.108.154, ...
Connecting to github-releases.githubusercontent.com (github-releases.githubusercontent.com)|185.199.110.154|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: 354684 (346K) [application/octet-stream]
Saving to: ‘/mnt/c/HomeAutomation/OpenVoiceOS/buildroot/output/build/.ccache-3.7.12.tar.xz.Swem02/output’

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2021-05-12 15:34:04 (9.81 MB/s) - ‘/mnt/c/HomeAutomation/OpenVoiceOS/buildroot/output/build/.ccache-3.7.12.tar.xz.Swem02/output’ saved [354684/354684]

ccache-3.7.12.tar.xz: OK (sha256: a02f4e8360dc6618bc494ca35b0ae21cea080f804a4898eab1ad3fcd108eb400)
>>> host-tar 1.32 Downloading
--2021-05-12 15:34:04--  http://ftpmirror.gnu.org/tar/tar-1.32.cpio.gz
Resolving ftpmirror.gnu.org (ftpmirror.gnu.org)... 209.51.188.200, 2001:470:142:5::200
Connecting to ftpmirror.gnu.org (ftpmirror.gnu.org)|209.51.188.200|:80... connected.
HTTP request sent, awaiting response... 302 Moved Temporarily
Location: http://mirrors.dotsrc.org/gnu/tar/tar-1.32.cpio.gz [following]
--2021-05-12 15:34:05--  http://mirrors.dotsrc.org/gnu/tar/tar-1.32.cpio.gz
Resolving mirrors.dotsrc.org (mirrors.dotsrc.org)... 130.225.254.116, 2001:878:346::116
Connecting to mirrors.dotsrc.org (mirrors.dotsrc.org)|130.225.254.116|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 4244374 (4.0M) [application/octet-stream]
Saving to: ‘/mnt/c/HomeAutomation/OpenVoiceOS/buildroot/output/build/.tar-1.32.cpio.gz.jrv0GQ/output’

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  3700K .......... .......... .......... .......... .......... 90% 25.9M 0s
  3750K .......... .......... .......... .......... .......... 91% 22.7M 0s
  3800K .......... .......... .......... .......... .......... 92% 26.4M 0s
  3850K .......... .......... .......... .......... .......... 94% 28.2M 0s
  3900K .......... .......... .......... .......... .......... 95% 26.2M 0s
  3950K .......... .......... .......... .......... .......... 96% 23.1M 0s
  4000K .......... .......... .......... .......... .......... 97% 27.5M 0s
  4050K .......... .......... .......... .......... .......... 98% 26.8M 0s
  4100K .......... .......... .......... .......... ....      100% 24.1M=0.3s

2021-05-12 15:34:05 (12.1 MB/s) - ‘/mnt/c/HomeAutomation/OpenVoiceOS/buildroot/output/build/.tar-1.32.cpio.gz.jrv0GQ/output’ saved [4244374/4244374]

tar-1.32.cpio.gz: OK (sha256: 9fbfba0cba05233421dd619b8825e1ceb7c144e433c15ae48b68f17ede8d404a)
>>> host-tar 1.32 Extracting
mkdir -p /mnt/c/HomeAutomation/OpenVoiceOS/buildroot/output/build/host-tar-1.32
cd /mnt/c/HomeAutomation/OpenVoiceOS/buildroot/output/build/host-tar-1.32 && gzip -d -c /mnt/c/HomeAutomation/OpenVoiceOS/downloads/tar/tar-1.32.cpio.gz | cpio -i --preserve-modification-time
33443 blocks
mv /mnt/c/HomeAutomation/OpenVoiceOS/buildroot/output/build/host-tar-1.32/tar-1.32/* /mnt/c/HomeAutomation/OpenVoiceOS/buildroot/output/build/host-tar-1.32
rmdir /mnt/c/HomeAutomation/OpenVoiceOS/buildroot/output/build/host-tar-1.32/tar-1.32
>>> host-tar 1.32 Patching
>>> host-tar 1.32 Updating config.sub and config.guess
for file in config.guess config.sub; do for i in $(find /mnt/c/HomeAutomation/OpenVoiceOS/buildroot/output/build/host-tar-1.32 -name $file); do cp support/gnuconfig/$file $i; done; done
>>> host-tar 1.32 Patching libtool
>>> host-tar 1.32 Configuring
(cd /mnt/c/HomeAutomation/OpenVoiceOS/buildroot/output/build/host-tar-1.32/ && rm -rf config.cache; PATH="/mnt/c/HomeAutomation/OpenVoiceOS/buildroot/output/host/bin:/mnt/c/HomeAutomation/OpenVoiceOS/buildroot/output/host/sbin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin" PKG_CONFIG="/mnt/c/HomeAutomation/OpenVoiceOS/buildroot/output/host/bin/pkg-config" PKG_CONFIG_SYSROOT_DIR="/" PKG_CONFIG_ALLOW_SYSTEM_CFLAGS=1 PKG_CONFIG_ALLOW_SYSTEM_LIBS=1 PKG_CONFIG_LIBDIR="/mnt/c/HomeAutomation/OpenVoiceOS/buildroot/output/host/lib/pkgconfig:/mnt/c/HomeAutomation/OpenVoiceOS/buildroot/output/host/share/pkgconfig" AR="/usr/bin/ar" AS="/usr/bin/as" LD="/usr/bin/ld" NM="/usr/bin/nm" CC="/mnt/c/HomeAutomation/OpenVoiceOS/buildroot/output/host/bin/ccache /usr/bin/gcc" GCC="/mnt/c/HomeAutomation/OpenVoiceOS/buildroot/output/host/bin/ccache /usr/bin/gcc" CXX="/mnt/c/HomeAutomation/OpenVoiceOS/buildroot/output/host/bin/ccache g++" CPP="/usr/bin/cpp" OBJCOPY="/usr/bin/objcopy" RANLIB="/usr/bin/ranlib" CPPFLAGS="-I/mnt/c/HomeAutomation/OpenVoiceOS/buildroot/output/host/include" CFLAGS="-O2 -I/mnt/c/HomeAutomation/OpenVoiceOS/buildroot/output/host/include" CXXFLAGS="-O2 -I/mnt/c/HomeAutomation/OpenVoiceOS/buildroot/output/host/include" LDFLAGS="-L/mnt/c/HomeAutomation/OpenVoiceOS/buildroot/output/host/lib -Wl,-rpath,/mnt/c/HomeAutomation/OpenVoiceOS/buildroot/output/host/lib" INTLTOOL_PERL=/usr/bin/perl CFLAGS="-O2 -I/mnt/c/HomeAutomation/OpenVoiceOS/buildroot/output/host/include" LDFLAGS="-L/mnt/c/HomeAutomation/OpenVoiceOS/buildroot/output/host/lib -Wl,-rpath,/mnt/c/HomeAutomation/OpenVoiceOS/buildroot/output/host/lib" CC="/usr/bin/gcc" CXX="g++" CONFIG_SITE=/dev/null ./configure --prefix="/mnt/c/HomeAutomation/OpenVoiceOS/buildroot/output/host" --sysconfdir="/mnt/c/HomeAutomation/OpenVoiceOS/buildroot/output/host/etc" --localstatedir="/mnt/c/HomeAutomation/OpenVoiceOS/buildroot/output/host/var" --enable-shared --disable-static --disable-gtk-doc --disable-gtk-doc-html --disable-doc --disable-docs --disable-documentation --disable-debug --with-xmlto=no --with-fop=no --disable-nls --disable-dependency-tracking  --without-selinux )
configure: WARNING: unrecognized options: --enable-shared, --disable-static, --disable-gtk-doc, --disable-gtk-doc-html, --disable-doc, --disable-docs, --disable-documentation, --disable-debug, --with-xmlto, --with-fop
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checking build system type... x86_64-pc-linux-gnu
checking host system type... x86_64-pc-linux-gnu
checking for d_ino member in directory struct... yes
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checking type of array argument to getgroups... gid_t
checking whether lstat correctly handles trailing slash... yes
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checking for promoted mode_t type... mode_t
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configure: WARNING: libacl development library was not found or not usable.
configure: WARNING: GNU tar will be built without ACL support.
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checking whether fcntl understands F_DUPFD_CLOEXEC... needs runtime check
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checking whether futimens works... yes
checking whether getcwd handles long file names properly... yes
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checking whether getcwd aborts when 4k < cwd_length < 16k... no
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checking whether mbrtowc handles incomplete characters... (cached) guessing yes
checking whether mbrtowc works as well as mbtowc... (cached) guessing yes
checking whether mbrtowc handles incomplete characters... (cached) guessing yes
checking whether mbrtowc works as well as mbtowc... (cached) guessing yes
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checking for mempcpy... (cached) yes
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checking for mkfifo... yes
checking whether mkfifo rejects trailing slashes... yes
checking whether mknod can create fifo without root privileges... configure: error: in `/mnt/c/HomeAutomation/OpenVoiceOS/buildroot/output/build/host-tar-1.32':
configure: error: you should not run configure as root (set FORCE_UNSAFE_CONFIGURE=1 in environment to bypass this check)
See `config.log' for more details
make[1]: *** [package/pkg-generic.mk:240: /mnt/c/HomeAutomation/OpenVoiceOS/buildroot/output/build/host-tar-1.32/.stamp_configured] Error 1
make[1]: Leaving directory '/mnt/c/HomeAutomation/OpenVoiceOS/buildroot'
cp -f buildroot/output/images/sdcard.img release/OpenVoiceOS_rpi4_64-gui.img
cp: cannot stat 'buildroot/output/images/sdcard.img': No such file or directory
make: *** [Makefile:26: rpi4_64-gui] Error 1

[ChanceNCounter]

Now that we have Discussions, I'm gonna convert this to a thread, and name it to reflect that it seems to be an "on Windows" situation.

fwiw, this is heavier than anything I've ever done in WSL. Still, might be worth ongoing attempts.