how do i compile from scratch Grub2 on Debian 64 bit and install it ? I'm very insistant on not using multiarch on my Debian 64-bit system. i can upgrade to testing as long as i can compile Grub2 from scratch and use nothing but 64 bit Debian. i have 1024MB EFI FAT32 parition on my drive in case Grub needs it, i've seen a linux distro use it before.

I boot from usb or DVD that is not EFI boot on bios. sometimes i think grub2 does not care or not about that fact. i'm on Legacy OS not Windows 7 UEFI selector on bios, and still want to compile grub from scratch no questions asked.

This should give you a start though I have to admit I don't know whether it will ask for 32 bit packages or not and find your refusal to install them odd to say the least.

theoretically do you think you or someone else could tell me how to compile grub2 on multiarch Debian with a listing of all needed packages ? i have never successfully compiled it before. i would like me to be a success for compiling grub2 on Debian from source.

thank you

I linked to a page showing how to compile any software on Debian using source code from their repositories to produce a .deb package which ought to make things easier the first time. However, this will create a virtually identical package to the one already in Debian so unless you expand upon exactly what you need it's difficult or anyone to help.

Why? What for ?

EFI is a BIOS replacement, so "EFI boot on BIOS" does not make sense.

GRUB does not take part in booting your DVD/USB. So it definitely doesn't care.


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I cloned the GRUB2 git repository, and compiled it without much trouble. I didn't create a Debian software package, because I wanted to set up my GRUB copy as my primary boot loader (under Legacy BIOS), independently of any Operating System installed on my computer.

From the primary boot loader, I can select any installed Operating System (i.e., Linux distribution, in my case), and chainload the boot loader that was set up by said Operating System. (I let each Linux distribution install its own boot loader to the boot sector of its root partition, instead of the Master Boot Record of the boot disk.)

Anyway, compiling GRUB2 from the git clone works fine for me under Debian. It failed, however, under Slackware 14.1, apparantly because of incomplete Unicode support, or some such. This issue was resolved with Slackware 14.2.