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| == Building in nix-shell == | | == Building in nix-shell == |
| Note: the following was tested and working on NixOS 21.11 (Porcupine) while compiling the QEMU target for Coreboot v4.15 as well as Coreboot master (7b168c92f6).
| | Coreboot as of 24.02 comes with a Nix shell expression for x86 at <code>util/nixshell//devshell-i386.nix</code>. |
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| To build your own coreboot bios:
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| Create a <code>shell.nix</code>, and run <code>nix-shell</code>
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| | |
| <syntaxhighlight lang="nix">
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| {
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| pkgs ? import <nixpkgs> { },
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| }:
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| # NOTE we need mkShellNoCC
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| # mkShell would add the regular gcc, which has no ada (gnat)
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| # https://github.com/NixOS/nixpkgs/issues/142943
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| pkgs.callPackage (
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| {
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| mkShellNoCC,
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| qemu,
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| pkg-config,
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| gnat11,
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| m4,
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| flex,
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| bison,
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| zlib,
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| ncurses,
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| }:
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| mkShellNoCC {
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| strictDeps = true;
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| # host/target agnostic programs
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| depsBuildBuild = [
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| qemu # override and change `hostCpuTargets` if cross-compiling
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| ];
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| # compilers & linkers & dependecy finding programs
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| nativeBuildInputs = [
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| pkg-config
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| gnat11 # gcc with ada
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| m4
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| flex
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| bison # Generate flashmap descriptor parser
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| ];
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| # libraries
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| buildInputs = [
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| zlib
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| ncurses # make menuconfig
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| ];
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| }
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| ) { }
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| </syntaxhighlight> | |
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| Now we can build coreboot:
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|
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| <syntaxHighlight lang=bash> | | <syntaxHighlight lang=bash> |
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| git submodule update --init --checkout --depth 1 | | git submodule update --init --checkout --depth 1 |
| du -sh . # ~700 MByte | | du -sh . # ~700 MByte |
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| | nix-shell --pure util/nixshell/devshell-i386.nix |
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| # configure | | # configure |
| # set mainboard model, chip size, ... | | # set mainboard model, chip size, ... |
| make menuconfig MENUCONFIG_COLOR=blackbg # blackbg = dark mode | | make menuconfig MENUCONFIG_COLOR=blackbg # blackbg = dark mode |
|
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| # build toolchain for a x86 target
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| # Note: the i386 toolchain is used for all x86 platforms including x86_64.
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| # See https://doc.coreboot.org/tutorial/part1.html
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| # to list all targets: make help
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| make crossgcc-i386 CPUS=$(nproc)
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|
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| # build firmware | | # build firmware |