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{ stdenv, fetchurl, perl, bison, mktemp, linuxHeaders, linuxHeadersCross, kernel ? null }:
assert stdenv.isLinux;
let
version = "1.5.24";
baseMakeFlags = ["V=1" "prefix=$out" "SHLIBDIR=$out/lib"];
in
stdenv.mkDerivation {
name = "klibc-${version}${stdenv.lib.optionalString (kernel != null) "-${kernel.version}"}";
src = fetchurl {
url = "http://ftp.eu.openbsd.org/pub/linux/libs/klibc/1.5/klibc-${version}.tar.bz2";
sha256 = "18lm32dlj9k2ky9wwk274zmc3jndgrb41b6qm82g3lza6wlw3yki";
};
# Trick to make this build on nix. It expects to have the kernel sources
# instead of only the linux kernel headers.
# So it cannot run the 'make headers_install' it wants to run.
# We don't install the headers, so klibc will not be useful as libc, but
# usually in nixpkgs we only use the userspace tools comming with klibc.
prePatch = stdenv.lib.optionalString (kernel == null) ''
sed -i -e /headers_install/d scripts/Kbuild.install
'';
makeFlags = baseMakeFlags;
inherit linuxHeaders;
crossAttrs = {
makeFlags = baseMakeFlags ++ [ "CROSS_COMPILE=${stdenv.cross.config}-"
"KLIBCARCH=${stdenv.cross.arch}" ];
patchPhase = ''
sed -i 's/-fno-pic -mno-abicalls/& -mabi=32/' usr/klibc/arch/mips/MCONFIG
sed -i /KLIBCKERNELSRC/d scripts/Kbuild.install
# Wrong check for __mips64 in klibc
sed -i s/__mips64__/__mips64/ usr/include/fcntl.h
'';
linuxHeaders = linuxHeadersCross;
};
# The AEABI option concerns only arm systems, and does not affect the build for
# other systems.
preBuild = ''
sed -i /CONFIG_AEABI/d defconfig
echo "CONFIG_AEABI=y" >> defconfig
makeFlags=$(eval "echo $makeFlags")
'' + (if kernel == null then ''
mkdir linux
cp -prsd $linuxHeaders/include linux/
chmod -R u+w linux/include/
'' else ''
tar xvf ${kernel.src}
mv linux* linux
cd linux
ln -sv ${kernel}/config .config
make prepare
cd ..
'');
# Install static binaries as well.
postInstall = ''
dir=$out/lib/klibc/bin.static
mkdir $dir
cp $(find $(find . -name static) -type f ! -name "*.g" -a ! -name ".*") $dir/
cp usr/dash/sh $dir/
'';
buildNativeInputs = [ perl bison mktemp ];
}
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