Coreboot: Difference between revisions

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 == 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>.
-To build your own coreboot bios:
-Create a <code>shell.nix</code>, and run <code>nix-shell</code>
-<syntaxhighlight lang="nix">
-# shell.nix
-# NOTE we need mkShellNoCC
-# mkShell would add the regular gcc, which has no ada (gnat)
-# https://github.com/NixOS/nixpkgs/issues/142943
-with import <nixpkgs> { };
-mkShellNoCC {
-  buildInputs = [
-    gnat11 # gcc with ada
-    #gnatboot # gnat1
-    ncurses # make menuconfig
-    m4 flex bison # Generate flashmap descriptor parser
-    #clang
-    zlib
-    #acpica-tools # iasl
-    pkgconfig
-    qemu # test the image
-  ];
-  shellHook = ''
-    # TODO remove?
-    NIX_LDFLAGS="$NIX_LDFLAGS -lncurses"
-  '';
-}
-</syntaxhighlight>
-Now we can build coreboot:
 <syntaxHighlight lang=bash>
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 git submodule update --init --checkout --depth 1
 du -sh . # ~700 MByte
+nix-shell --pure util/nixshell/devshell-i386.nix
 # configure
 # set mainboard model, chip size, ...
 make menuconfig MENUCONFIG_COLOR=blackbg # blackbg = dark mode
-# build toolchain for a x86 target
-# Note: the i386 toolchain is used for all x86 platforms including x86_64.
-# See https://doc.coreboot.org/tutorial/part1.html
-# to list all targets: make help
-make crossgcc-i386 CPUS=$(nproc)
 # build firmware