nixpkgs/pkgs/os-specific/linux/dietlibc/builder.sh

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source $stdenv/setup
makeFlags="prefix=$out"
installFlags="prefix=$out"
postInstall=postInstall
postInstall() {
(cd $out && ln -s lib-* lib)
(cd $out/lib && ln -s start.o crt1.o)
# Fake crti.o and crtn.o.
touch empty.c
gcc -c empty.c -o $out/lib/crti.o
gcc -c empty.c -o $out/lib/crtn.o
# Copy <sys/user.h> from Glibc; binutils wants it.
cp $glibc/include/sys/user.h $out/include/sys/
# Remove <dlfcn.h>, it makes some packages think we can load
# dynamic libraries.
rm $out/include/dlfcn.h
# Dietlibc has a asm include directory, whose presence makes the
# asm directory of kernel-headers unreachable. So make symlinks
# from the dietlibc asm to the kernel-headers asm.
ln -s $kernelHeaders/include/asm/* $out/include/asm/ || true
# Idem for include/linux.
ln -s $kernelHeaders/include/linux/* $out/include/linux/ || true
}
genericBuild