# This file defines the various standard build environments. # # On Linux systems, the standard build environment consists of # Nix-built instances glibc and the `standard' Unix tools, i.e., the # Posix utilities, the GNU C compiler, and so on. On other systems, # we use the native C library. # stdenvType exists to support multiple kinds of stdenvs on the same # system, e.g., cygwin and mingw builds on i686-cygwin. Most people # can ignore it. {system, stdenvType ? system, allPackages}: assert system != "i686-cygwin" -> system == stdenvType; rec { # Trivial environment used for building other environments. stdenvInitial = import ./initial { name = "stdenv-initial"; inherit system; }; # The native (i.e., impure) build environment. This one uses the # tools installed on the system outside of the Nix environment, # i.e., the stuff in /bin, /usr/bin, etc. This environment should # be used with care, since many Nix packages will not build properly # with it (e.g., because they require GNU Make). stdenvNative = import ./native { inherit stdenvInitial; }; stdenvNativePkgs = allPackages { bootStdenv = stdenvNative; noSysDirs = false; }; # The Nix build environment. stdenvNix = import ./nix (rec { stdenv = stdenvNative; pkgs = stdenvNativePkgs; }); # Linux standard environment. stdenvLinux = (import ./linux {inherit system allPackages;}).stdenvLinux; # MinGW/MSYS standard environment. stdenvMinGW = import ./mingw { inherit system; }; # Select the appropriate stdenv for the platform `system'. stdenv = if stdenvType == "i686-linux" then stdenvLinux else if stdenvType == "x86_64-linux" then stdenvLinux else if stdenvType == "powerpc-linux" then stdenvLinux else if stdenvType == "i686-mingw" then stdenvMinGW else if stdenvType == "i686-darwin" then stdenvNix else stdenvNative; }