mirror of
https://github.com/clangen/musikcube.git
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4f44829cda
* Update minimum CMake version requirement to get rid of warning. * Include CMake compile commands for easier diagnostics. * More improvements to arm toolchain selection while cross-compiling third-party dependencies. * Use x-tools provided cmake toolchains * Add a script to download and extract deb dependencies for crosscompile. * Link against libstdc++ statically when cross-compiling to ARM to improve portability. * Update GeneratePackage.cmake to generate better filenames. * Ensure symbols are stripped properly when cross-compiling * Remove old scripts that are no longer required * Add script to install x-tools * Add some docs that describe how to setup a crosscompile environment. * Add docs for building standlone on Linux * Update CHANGELOG * Update version hash.
72 lines
2.5 KiB
Markdown
72 lines
2.5 KiB
Markdown
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# Forward
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- stolen from here: https://medium.com/@crmoratelli/architectural-chroot-for-faster-compilation-and-deployment-on-raspberry-pi-76224327659d
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# Install dependencies
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- `sudo apt install qemu-kvm qemu-user-static binfmt-support qemu-user-static qemu-utils kpartx e2fsprogs`
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# Create a new directory
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- `mkdir rpi-buster-chroot`
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# Download image
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- `wget https://downloads.raspberrypi.org/raspios_oldstable_lite_armhf/images/raspios_oldstable_lite_armhf-2023-05-03/2023-05-03-raspios-buster-armhf-lite.img.xz`
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# Extract image
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- `xz -d -v 2023-05-03-raspios-buster-armhf-lite.img.xz`
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# Expand the image
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- `qemu-img resize -f raw 2023-05-03-raspios-buster-armhf-lite.img 16G`
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# Expand the partition within the image
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- `fdisk 2023-05-03-raspios-buster-armhf-lite.img`
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- `Command: p` [prints the partition table. note partition #2's "Start" value.]
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- `Command: d` [delete a partition]
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- `Command: 2` [delete the Linux partition, which should be #2]
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- `Command: n` [add new partition]
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- `Command: p` [primary partition]
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- `Command: 2` [partition number]
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- `Command: ` [enter start value from first step]
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- `Command: ` [press enter to accept default value]
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- `Command: N` [to *NOT* remove the ext4 signature]
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- `Command: w` [write table to file]
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# Create a mount point
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- `mkdir os-mount`
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# Mount both disk imagen partitions via loopback
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- `sudo kpartx -a -v 2023-05-03-raspios-buster-armhf-lite.img`
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output, note device names:
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```
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add map loop4p1 (253:0): 0 524288 linear 7:4 8192
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add map loop4p2 (253:1): 0 33021952 linear 7:4 532480 <== THIS IS OUR ACTUAL OS
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```
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# Mount the second partition to the filesystem
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- `sudo mount /dev/mapper/loop4p2 ./os-mount`
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# Resize the ext filesystem
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- `sudo /sbin/resize2fs /dev/mapper/loop4p2`
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# Inject qemu and setup special mount points
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- `sudo cp /usr/bin/qemu-arm-static ./os-mount/usr/bin`
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- `sudo mount -o bind /dev ./os-mount/dev`
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- `sudo mount -o bind /proc ./os-mount/proc`
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- `sudo mount -o bind /sys ./os-mount/sys`
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# Magic: register `qemu-arm-static` as the arm interpreter in the kernel
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> Must be root, no `sudo`
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- `su`
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- `echo ':arm:M::\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x28\x00:\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff:/usr/bin/qemu-arm-static:' > /proc/sys/fs/binfmt_misc/register`
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- `exit`
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# Enter the chroot
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- `sudo chroot ./os-mount`
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# Shutdown
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- `sudo umount ./os-mount/dev`
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- `sudo umount ./os-mount/proc`
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- `sudo umount ./os-mount/sys`
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- `sudo umount ./os-mount`
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- `sudo kpartx -d -v 2023-05-03-raspios-buster-armhf-lite.img`
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