Merge branch 'isohybrid' into 'master'

Enable use of the isohybrid tool

The `isohybrid` tool (included with `syslinux`) allows users to create a bootable USB image from the
CD images we distribute. However, in order for this to work the CD
images must include `isolinux.bin`, not `isolinux-debug.bin`. Otherwise you will get an error like this:
```
$ isohybrid adelie-full-x86_64-1.0-alpha4-20171223.iso 
isohybrid: adelie-full-x86_64-1.0-alpha4-20171223.iso: boot loader does not have an isolinux.bin
hybrid signature. Note that isolinux-debug.bin does not support hybrid booting
```
This change is made for `pmmx` and `x86_64`.

I then used this change and built a new CD image, then ran `isohybrid adelie-full-x86_64-...`. The resulting image (it has the same filename by default) can be pushed to a USB drive like so (taken from [`syslinux`'s documentation](http://www.syslinux.org/wiki/index.php?title=Isohybrid)):
```
# dd bs=2048 if=/path/to/adelie.iso of=/dev/sdX status=progress
```
[Arch](https://wiki.archlinux.org/index.php/USB_flash_installation_media#Using_dd) uses `bs=4M oflag=sync`. Someone smarter than me can determine if this is needed.

No further changes were necessary to boot from USB at that point, other than fiddling with boot order and such.

Something else to consider is whether Adélie should distribute these hybrid images pre-made, or if it should be left to the user.


See merge request !1

0 files changed, 0 insertions, 0 deletions