2aba922d30
My idea is to provide special stdenv expressions that will contain in the path
additional cross compilers. As most expressions for programs accept a stdenv parameter,
we could substitute this parameter with the special stdenv, which will have a
generic builder that attempts the usual "--target=..." and can additionally
have an env variable like "cross" with the target architecture set.
So, finally we could have additional expressions like this:
bashRealArm = makeOverridable (import ../shells/bash) {
inherit fetchurl bison;
stdenv = stdenvCross "armv5tel-unknown-linux-gnueabi";
};
Meanwhile it does not work - I still cannot get the cross-gcc to build.
I think it does not fill the previous expressions with a lot of noise, so I
think it may be a good path to follow.
I only touched some files of the current stdenv: gcc-4.3, kernel headers
2.6.28, glibc 2.9, ...
I tried to use the gcc-cross-wrapper, that may be very outdated. Maybe I will
update it, or update the gcc-wrapper expression to make it fit the cross tools,
but meanwhile I even cannot build gcc, so I have not tested the wrapper.
This new idea on cross compiling is not similar to that of the
nixpkgs/branches/cross-compilation, which mostly added bare new expressions for
anything to be cross compiled, if I understood it correctly.
I cared not to break anything of the usual stdenv in all this work.
svn path=/nixpkgs/branches/stdenv-updates/; revision=18343
63 lines
1.8 KiB
Nix
63 lines
1.8 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 ../.., cross ? null}:
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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;
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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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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 cross;}).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 == "powerpc-linux" then /* stdenvLinux */ stdenvNative else
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if stdenvType == "i686-mingw" then stdenvMinGW else
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if stdenvType == "i686-darwin" then stdenvNix else
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stdenvNative;
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}
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