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I tried to use the gcc-cross-wrapper, that may be very outdated.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
This comes from:
svn diff ^/nixpkgs/trunk/@18255 ^/nixpkgs/branches/stdenv-updates/ > diff
patch -p0 < diff
and then adding into svn all files new from the patch.
trunk@18255 comes from the last time I updated stdenv-updates from trunk.
svn path=/nixpkgs/stdenv-updates2/; revision=18272
* glibc_multi: a wrapper that combines the 32-bit and 64-bit Glibcs.
This is necessary so that 64-bit GCC can find gnu/stubs-32.h and the
32-bit Glibc libraries.
To build glibc_multi on x86_64-linux, you still need either the
i686-linux Glibc derivation from a channel, or to have configured
Nix with support for forwarding the build to a i686-linux machine.
In the future this may become unnecessary by providing a prebuilt
binary of 32-bit Glibc somewhere (like the binaries used in the
stdenvLinux bootstrap).
* With glibc_multi, it becomes possible to build gcc with multilib
support (i.e. it builds 32-bit and 64-bit versions of libgcc,
libstdc++, etc.).
svn path=/nixpkgs/trunk/; revision=12203
