core/pkgs/by-name/ll/llvm/multi.nix

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{ runCommand, clang, gcc64, gcc32, glibc_multi }:
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let
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combine = basegcc:
runCommand "combine-gcc-libc" { } ''
mkdir -p $out
cp -r ${basegcc.cc}/lib $out/lib
chmod u+rw -R $out/lib
cp -r ${basegcc.libc}/lib/* $(ls -d $out/lib/gcc/*/*)
'';
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gcc_multi_sysroot = runCommand "gcc-multi-sysroot" {
passthru = {
inherit (gcc64) version;
lib = gcc_multi_sysroot;
};
} ''
mkdir -p $out/lib{,64}/gcc
ln -s ${combine gcc64}/lib/gcc/* $out/lib64/gcc/
ln -s ${combine gcc32}/lib/gcc/* $out/lib/gcc/
# XXX: This shouldn't be needed, clang just doesn't look for "i686-unknown"
ln -s $out/lib/gcc/i686-unknown-linux-gnu $out/lib/gcc/i686-pc-linux-gnu
# includes
mkdir -p $out/include
ln -s ${glibc_multi.dev}/include/* $out/include
ln -s ${gcc64.cc}/include/c++ $out/include/c++
# dynamic linkers
mkdir -p $out/lib/32
ln -s ${glibc_multi.out}/lib/ld-linux* $out/lib
ln -s ${glibc_multi.out}/lib/32/ld-linux* $out/lib/32/
'';
clangMulti = clang.override {
# Only used for providing expected structure re:dynamic linkers, AFAIK Most
# of the magic is done by setting the --gcc-toolchain option via
# `gccForLibs`.
libc = gcc_multi_sysroot;
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bintools = clang.bintools.override { libc = gcc_multi_sysroot; };
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gccForLibs = gcc_multi_sysroot // {
inherit (glibc_multi) libgcc;
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langCC = assert (gcc64.cc.langCC != gcc32.cc.langCC) -> throw
"(gcc64.cc.langCC=${gcc64.cc.langCC}) != (gcc32.cc.langCC=${gcc32.cc.langCC})";
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gcc64.cc.langCC;
};
};
in clangMulti