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https://github.com/NixOS/nixpkgs.git
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77 lines
2.7 KiB
Nix
77 lines
2.7 KiB
Nix
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# This file defines the various standard build environments.
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#
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# On Linux systems, the standard build environment consists of
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# Nix-built instances glibc and the `standard' Unix tools, i.e., the
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# Posix utilities, the GNU C compiler, and so on. On other systems,
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# we use the native C library.
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{system, allPackages}: rec {
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# The native (i.e., impure) build environment. This one uses the
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# tools installed on the system outside of the Nix environment,
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# i.e., the stuff in /bin, /usr/bin, etc. This environment should
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# be used with care, since many Nix packages will not build properly
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# with it (e.g., because they require GNU Make).
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stdenvNative = (import ../stdenv/native) {system = system;};
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stdenvNativePkgs = allPackages {system = system; stdenv = stdenvNative;};
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# The Nix build environment.
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stdenvNix = (import ../stdenv/nix) {
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bootStdenv = stdenvNative;
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pkgs = stdenvNativePkgs;
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};
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stdenvNixPkgs = allPackages {system = system; stdenv = stdenvNix;};
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# The Linux build environment is a fully bootstrapped Nix
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# environment, that is, it should contain no external references.
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# 1) Build glibc in the native build environment. The result is
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# pure (I promise!).
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stdenvLinuxGlibc = stdenvNativePkgs.glibc;
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# 2) Construct a stdenv consisting of the native build environment,
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# plus the pure glibc.
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stdenvLinuxBoot1 = (import ../stdenv/nix-linux/boot.nix) {
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system = system;
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glibc = stdenvLinuxGlibc;
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};
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# 3) Now we can build packages that will have the Nix glibc.
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stdenvLinuxBoot1Pkgs = allPackages {system = system; stdenv = stdenvLinuxBoot1;};
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# 4) However, since these packages are built by an native C compiler
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# and linker, they may well pick up impure references (e.g., bash
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# might end up linking against /lib/libncurses). So repeat, but
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# now use the Nix-built tools from step 2/3.
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stdenvLinuxBoot2 = (import ../stdenv/nix-linux) {
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bootStdenv = stdenvLinuxBoot1;
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pkgs = stdenvLinuxBoot1Pkgs;
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glibc = stdenvLinuxGlibc;
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};
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# 5) These packages should be pure.
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stdenvLinuxBoot2Pkgs = allPackages {system = system; stdenv = stdenvLinuxBoot2;};
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# 6) So finally we can construct the Nix build environment.
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stdenvLinux = (import ../stdenv/nix-linux) {
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bootStdenv = stdenvLinuxBoot2;
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pkgs = stdenvLinuxBoot2Pkgs;
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glibc = stdenvLinuxGlibc;
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};
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# 7) And we can build all packages against that, but we don't
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# rebuild stuff from step 6.
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stdenvLinuxPkgs =
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allPackages {system = system; stdenv = stdenvLinux;} //
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{inherit (stdenvLinuxBoot2Pkgs)
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gzip bzip2 bash binutils coreutils diffutils findutils gawk gcc
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gnumake gnused gnutar gnugrep wget;
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} //
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{glibc = stdenvLinuxGlibc;};
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}
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