cf8daf6312
This allows various applications. It allows users to set global optimisation flags, e.g. stdenv.userHook = ''NIX_CFLAGS_COMPILE+=" -funroll-loops"''; But the impetus is as an alternative to issue #229, allowing impure stdenv setup for people who want to use distcc: stdenv.userHook = "source /my/impure/setup-script.sh"; This is probably a bad idea, but at least now it's a bad idea in people's configuration and not in Nixpkgs. :-)
65 lines
2 KiB
Nix
65 lines
2 KiB
Nix
# 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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# stdenvType exists to support multiple kinds of stdenvs on the same
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# system, e.g., cygwin and mingw builds on i686-cygwin. Most people
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# can ignore it.
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{ system, stdenvType ? system, allPackages ? import ../.., platform, config }:
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assert system != "i686-cygwin" -> system == stdenvType;
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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 ./native {
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inherit system allPackages config;
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}).stdenv;
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stdenvNativePkgs = allPackages {
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bootStdenv = stdenvNative;
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noSysDirs = false;
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};
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# The Nix build environment.
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stdenvNix = import ./nix {
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inherit config;
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stdenv = stdenvNative;
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pkgs = stdenvNativePkgs;
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};
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# Linux standard environment.
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stdenvLinux = (import ./linux { inherit system allPackages platform config;}).stdenvLinux;
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# MinGW/MSYS standard environment.
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stdenvMinGW = import ./mingw {
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inherit system;
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};
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# Select the appropriate stdenv for the platform `system'.
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stdenv =
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if stdenvType == "i686-linux" then stdenvLinux else
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if stdenvType == "x86_64-linux" then stdenvLinux else
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if stdenvType == "armv5tel-linux" then stdenvLinux else
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if stdenvType == "armv7l-linux" then stdenvLinux else
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if stdenvType == "mips64el-linux" then stdenvLinux else
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if stdenvType == "powerpc-linux" then /* stdenvLinux */ stdenvNative else
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if stdenvType == "i686-mingw" then stdenvMinGW else
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if stdenvType == "x86_64-darwin" then stdenvNix else
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stdenvNative;
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}
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