forked from mirrors/nixpkgs
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I tried to use the gcc-cross-wrapper, that may be very outdated.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
99 lines
2.8 KiB
Bash
99 lines
2.8 KiB
Bash
source $stdenv/setup
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export NIX_FIXINC_DUMMY=$NIX_BUILD_TOP/dummy
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mkdir $NIX_FIXINC_DUMMY
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# libstdc++ needs this; otherwise it will use /lib/cpp, which is a Bad
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# Thing.
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export CPP="gcc -E"
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if test "$noSysDirs" = "1"; then
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if test -e $NIX_GCC/nix-support/orig-libc; then
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# Figure out what extra flags to pass to the gcc compilers
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# being generated to make sure that they use our glibc.
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extraCFlags="$(cat $NIX_GCC/nix-support/libc-cflags)"
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extraLDFlags="$(cat $NIX_GCC/nix-support/libc-ldflags) $(cat $NIX_GCC/nix-support/libc-ldflags-before)"
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# Use *real* header files, otherwise a limits.h is generated
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# that does not include Glibc's limits.h (notably missing
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# SSIZE_MAX, which breaks the build).
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export NIX_FIXINC_DUMMY=$(cat $NIX_GCC/nix-support/orig-libc)/include
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else
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# Hack: support impure environments.
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extraCFlags="-isystem /usr/include"
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extraLDFlags="-L/usr/lib64 -L/usr/lib"
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export NIX_FIXINC_DUMMY=/usr/include
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fi
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extraCFlags="-g0 -I$gmp/include -I$mpfr/include $extraCFlags"
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extraLDFlags="--strip-debug $extraLDFlags"
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export NIX_EXTRA_CFLAGS=$extraCFlags
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for i in $extraLDFlags; do
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export NIX_EXTRA_LDFLAGS="$NIX_EXTRA_LDFLAGS -Wl,$i"
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done
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makeFlagsArray=( \
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"${makeFlagsArray[@]}" \
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NATIVE_SYSTEM_HEADER_DIR="$NIX_FIXINC_DUMMY" \
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SYSTEM_HEADER_DIR="$NIX_FIXINC_DUMMY" \
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LIMITS_H_TEST=true \
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X_CFLAGS="$NIX_EXTRA_CFLAGS $NIX_EXTRA_LDFLAGS" \
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LDFLAGS="$NIX_EXTRA_CFLAGS $NIX_EXTRA_LDFLAGS" \
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LDFLAGS_FOR_TARGET="$NIX_EXTRA_CFLAGS $NIX_EXTRA_LDFLAGS" \
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)
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fi
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preConfigure() {
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# Perform the build in a different directory.
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mkdir ../build
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cd ../build
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configureScript=../$sourceRoot/configure
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}
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postInstall() {
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# Remove precompiled headers for now. They are very big and
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# probably not very useful yet.
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find $out/include -name "*.gch" -exec rm -rf {} \; -prune
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# Remove `fixincl' to prevent a retained dependency on the
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# previous gcc.
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rm -rf $out/libexec/gcc/*/*/install-tools
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rm -rf $out/lib/gcc/*/*/install-tools
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# Get rid of some "fixed" header files
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rm -rf $out/lib/gcc/*/*/include/root
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# Replace hard links for i686-pc-linux-gnu-gcc etc. with symlinks.
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for i in $out/bin/*-gcc*; do
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if cmp -s $out/bin/gcc $i; then
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ln -sfn gcc $i
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fi
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done
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for i in $out/bin/*-c++* $out/bin/*-g++*; do
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if cmp -s $out/bin/g++ $i; then
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ln -sfn g++ $i
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fi
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done
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}
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if test -n "$cross"; then
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if test -z "$profiledCompiler"; then
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buildFlags="bootstrap $buildFlags"
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else
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buildFlags="profiledbootstrap $buildFlags"
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fi
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fi
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genericBuild
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