Subversion Repositories QNX 8.QNX8 LLVM/Clang compiler suite

@echo off

setlocal enableextensions enabledelayedexpansion

rem // what we're building

set PRODUCT_NAME=the LLVM compiler suite

rem // the WSL distribution to use and hostname where its packages are downloaded from

set WSL_DISTR=Ubuntu-22.04

set WSL_SOURCE=archive.ubuntu.com

rem // name of the QNX SDK root directory

set QNXSDK_DIRNAME=qnx800

rem // list of Linux tools required by the cross-build script

set REQUIRED_TOOLS=wget python3 cmake gcc g++ ninja:ninja-build ccache

rem // welcome the wary user

echo QNX8 toolchain cross-build script for WSL by Pierre-Marie Baty ^<pm@pmbaty.com^>

echo.

rem // make sure we have at least Windows 10

for /f "tokens=4 delims=. " %%i in ('ver') do set VERSION=%%i

echo Detected Windows NT kernel version: %VERSION%

if %VERSION% LSS 10 (

        echo.

        echo Error: you need at least Windows 10 to cross-build %PRODUCT_NAME% to QNX 8.

        echo Please upgrade your Windows operating system to Windows 10 version 2004 build

        echo 19041 or a later version.

        goto :exit_error

)

rem // if WSL is not installed, do so

echo|set /p=Checking whether the Windows Subsystem for Linux is installed...

wsl --list -v > nul 2>&1 || ( echo no & goto :install_wsl )

echo yes

rem // WSL is installed, make sure the Linux distribution we need is there

echo|set /p=Checking for the presence of the GNU/Linux distribution %WSL_DISTR% in WSL...

wsl --distribution %WSL_DISTR% -- cat /etc/os-release|find "%WSL_DISTR:-= %" > nul || ( echo no & goto :install_wsl )

echo yes

rem // WSL is installed with the right Linux distribution, make sure it's running WSL2

echo|set /p=Checking whether the WSL hypervisor is version 2...

wsl --distribution %WSL_DISTR% -- cat /proc/version|find "WSL2" > nul || (

        echo no

        echo|set /p=Attempting to convert the WSL distribution %WSL_DISTR% to WSL2...

        rem // this distribution needs to be converted

        wsl --set-version %WSL_DISTR% 2 || (

                echo failed

                echo.

                echo Error: you need the Windows Subsystem for Linux to support WSL2 for this

                echo cross-build script to work consistently.

                echo Please upgrade your Windows operating system to Windows 10 version 2004 build

                echo 19041 or a later version.

                goto :exit_error

        )

        rem // alright, this distribution is on WSL2

)

echo ok

rem // make sure we're running from LOCAL STORAGE - if not, WSL2 will have relocated to $HOME and this will fuck everything up

echo|set /p=Checking whether WSL knows the path to this very directory...

wsl --distribution %WSL_DISTR% -- test ^"$^(pwd^)^" = ^"${HOME}^" && (

        echo no

        echo.

        echo Error: you need to locate your working copy of this SVN repository on *local*

        echo storage for the cross-build script to work consistently. The Windows Subsystem

        echo for Linux cannot access Windows network shares.

        echo Please relocate this repository on a local hard drive and try again.

        goto :exit_error

)

echo yes

rem // make sure we have the required tools, install them if not

set ETC_SUDOERS_PATCHED=0

for %%i in (%REQUIRED_TOOLS%) do (

        rem // tool syntax: "<executable>:<optional APT package name>"

        rem // if package name is not specified, it defaults to <executable>

        set REQUIRED_TOOL_AND_PACKAGE=%%i

        for /f "tokens=1-2 delims=:" %%j in ('echo !REQUIRED_TOOL_AND_PACKAGE!') do (

                set REQUIRED_TOOL=%%j

                set REQUIRED_PACKAGE=%%k

                if "!REQUIRED_PACKAGE!"=="" set REQUIRED_PACKAGE=!REQUIRED_TOOL!

        )

        echo|set /p=Checking for the presence of !REQUIRED_TOOL! from APT package !REQUIRED_PACKAGE!...

        wsl --distribution %WSL_DISTR% -- !REQUIRED_TOOL! --version > nul 2>&1 && (

                echo yes

        ) || (

                echo no

                echo !REQUIRED_TOOL! needs installation. Attempting to install it.

                if "!ETC_SUDOERS_PATCHED!"=="0" (

                        rem // allow ourselves to run any commands by patching /etc/sudoers. Do this once, and only if necessary. Also drop a note for posterity on why this was done.

                        wsl --distribution %WSL_DISTR% -- sudo sh -c ^"grep -q '%%sudo  ALL=^(ALL^) NOPASSWD:ALL' /etc/sudoers ^|^| { echo ''; echo '# Pierre-Marie Baty -- added automatically on %DATE% by %~nx0 script'; echo '# This line allows members of the sudo group to execute any command WITHOUT the need to enter the root password'; echo '%%sudo  ALL=^(ALL^) NOPASSWD:ALL'; } ^>^> /etc/sudoers^"

                        set ETC_SUDOERS_PATCHED=1

                        rem // TEST if we have a working network from within WSL. It's no point waiting around if we don't. If it turns out we don't, jump to the relevant label

                        echo Testing network connectivity...

                        wsl --distribution %WSL_DISTR% -- ping -c 1 %WSL_SOURCE% > nul 2>&1 || goto :no_network

                        rem // we MIGHT have a working network. Update APT cache before installing stuff, but just once. If it turns out we can't, jump to the relevant label

                        wsl --distribution %WSL_DISTR% -- sudo apt-get -y update || goto :no_network

                        rem // at this point we can consider that networking works from within WSL.

                )

                rem // attempt installation of this package from the network. If it fails, assume it's a network problem (cable unplugged?) and jump to the relevant label

                wsl --distribution %WSL_DISTR% sudo apt-get -y install !REQUIRED_PACKAGE! || goto :no_network

        )

)

rem // if we reach here it means all the tools were successfully installed from the network, so jump to the next step

goto :packages_installed

:no_network

rem // if we reach here, it means package installation from the network failed. Stop being nice and stuff them up Linux's ass with maximal pain from local storage.

echo Looks like the network is unavailable. Nevermind the bollocks.

echo Installing all the necessary packages at once...

wsl --distribution %WSL_DISTR% sudo dpkg -i "../../Third-party software/%WSL_DISTR:-= % Debian packages for WSL2/"*.deb || (

        echo.

        echo Error: the required Linux tools %REQUIRED_TOOLS% can't be installed.

        goto :exit_error

)

goto :packages_installed

rem // nuff said.

:packages_installed

rem // setup the QNX SDP on the WSL side

rem // The build script initially recursively transferred the contents of $QNX_HOST and $QNX_TARGET to the WSL2 ext4 partition

rem // when necessary using the Plan9 NTFS to ext4 bridge (9p file protocol) implemented by Microsoft to transfer files

rem // from Windows to WSL2. The only problem with this is, and Microsoft admits it, that 9p is *catastrophically slow*.

rem // See https://learn.microsoft.com/en-us/windows/wsl/compare-versions - And when Microsoft says "slow", hear "unusable".

rem // To make this faster, here's what I do:

rem //   1. fire up an archiver and create a SINGLE FILE archive of the directory hierarchy to copy

rem //   2. hand the file over to WSL2

rem //   3. unpack the archive in place - as it's much faster to migrate a single file than a folder hierarchy.

rem // The only prerequisite shall be that the archive format be *operable with the tools at hand on both systems*.

rem // By using the "usr\bin\tar.exe" utility from the QNX8 Win64 host SDP tools and piping the data through a WSL2 instance running

rem // the Linux version of /usr/bin/tar to untar it directly at its location, we achieve 10x faster transfer speeds than 9p.

rem // This is just ridiculous. I scoured the web for hours looking for an acceptable file transfer solution from Windows to WSL2

rem // and it looks just like nobody found that one yet. Ah well...

rem // see if the SDP needs to be copied at all. Only do this when the modification time of the SDP directory on Windows is more recent than the one on Linux.

rem // So test for the presence of the symlinks state file as it's the last file that's created (this ensures a complete copy), then check for the directory mtimes.

rem // NOTE: on WSL2, the QNX SDK will always be copied to $HOME, regardless of what xdg-user-dir DESKTOP says.

echo|set /p=Checking if the %QNXSDK_DIRNAME% directory is present in WSL and up to date...

wsl --distribution %WSL_DISTR% -- test ! -f "${HOME}/%QNXSDK_DIRNAME%/.symlinks-state" -o "../%QNXSDK_DIRNAME%" -nt "${HOME}/%QNXSDK_DIRNAME%" && (

        echo no

        rem // copy needed - cleanup and create the directories we'll need in $HOME to accomodate the QNX SDK. We want the Linux host tools, and the QNX target sysroot files

        echo|set /p=Preparing to copy QNX8 SDK files to WSL2 ext4 filesystem...

        wsl --distribution %WSL_DISTR% -- rm -rf "${HOME}/%QNXSDK_DIRNAME%"; mkdir -p "${HOME}/%QNXSDK_DIRNAME%/host" "${HOME}/%QNXSDK_DIRNAME%/target" 2>nul

        echo done

        rem // transfer the QNX SDK host files: tar on Windows, pipe to WSL2, untar on Linux - or die

        echo|set /p=Deploying QNX8 SDK Linux host files to WSL2 ext4 filesystem ^(this can take some time^)...

        "..\%QNXSDK_DIRNAME%\host\win64\x86_64\usr\bin\tar.exe" -c --directory="..\%QNXSDK_DIRNAME%\host" linux | wsl --distribution %WSL_DISTR% -- tar -x --directory="${HOME}/%QNXSDK_DIRNAME%/host" || ( echo failed & goto :exit_error )

        echo done

        rem // Windows has absolutely no notion of UNIX permissions. The best we can do here is to arbitrarily set the executable flags on relevant parts of the migrated tree.

        echo|set /p=Setting executable permissions to QNX8 SDK toolchain files...

        wsl --distribution %WSL_DISTR% -- chmod -R +x "${HOME}/%QNXSDK_DIRNAME%/host/linux/x86_64/usr/bin" "${HOME}/%QNXSDK_DIRNAME%/host/linux/x86_64/usr/lib/gcc" || goto :exit_error

        echo done

        rem // transfer the QNX SDK target files: tar on Windows, pipe to WSL2, untar on Linux - or die

        echo|set /p=Deploying QNX8 SDK target sysroot files to WSL2 ext4 filesystem ^(this WILL take some time^)...

        "..\%QNXSDK_DIRNAME%\host\win64\x86_64\usr\bin\tar.exe" -c --directory="..\%QNXSDK_DIRNAME%\target" qnx | wsl --distribution %WSL_DISTR% -- tar -x --directory="${HOME}/%QNXSDK_DIRNAME%/target" || ( echo failed & goto :exit_error )

        echo done

        rem // setup the toolchain symlinks

        echo Setting up the QNX SDP platform-specific symlinks...

        "..\%QNXSDK_DIRNAME%\host\win64\x86_64\usr\bin\tar.exe" -c --directory="..\%QNXSDK_DIRNAME%" symlinks.sh | wsl --distribution %WSL_DISTR% -- tar -x --directory="${HOME}/%QNXSDK_DIRNAME%" || ( echo failed & goto :exit_error )

        wsl --distribution %WSL_DISTR% -- cd "${HOME}/%QNXSDK_DIRNAME%" ^&^& find . -name symlinks.lst -exec ./symlinks.sh {} create $1 \; ^&^& printf 'present-v2' ^> "${HOME}/%QNXSDK_DIRNAME%/.symlinks-state" || goto :exit_error

)

echo ok

rem // now chain-call the POSIX Bourne shell build script

echo Running POSIX build script...

wsl --distribution %WSL_DISTR% -- ./cross-build.sh || goto :exit_error

rem // at this point, the story is supposed to have ended well.

rem // Keep calm, and I'll tell you another one tomorrow.

echo.

echo The build ended successfully.

goto :exit_success

:install_wsl

        echo Installing the Windows Subsystem for Linux...

        echo  __________________________________________________________________________

        echo ^|                                                                          ^|

        echo ^| NOTE: please define a *non-root* Linux user name and password when asked ^|

        echo ^|       ^(for example: 'utilisateur' / 'utilisateur'^)                       ^|

        echo ^|       then type 'exit' at the Linux shell ^(green prompt^) to continue.    ^|

        echo ^|__________________________________________________________________________^|

        echo.

        wsl --install --distribution %WSL_DISTR% || (

                echo Error: you need at least a version of Windows 10 which has the "wsl" command.

                echo Please upgrade your Windows operating system to Windows 10 version 2004 build

                echo 19041 or a later version.

                goto :exit_error

        )

        echo The Windows Subsystem for Linux was successfully installed with the %WSL_DISTR% distribution.

        echo Action required: please reboot your computer if requested and run this script again.

        goto :exit_success

:exit_error

rem // failure exit

echo.

pause

exit /b 1

:exit_success

rem // successful exit

echo.

pause

exit /b 0