Cross-compiled kernel package contains host binaries

[Tomas Hlavacek]

The resulting package that came from cross-compilation of current master kernel (4.10-rc4+ or more precisely: 0aa0313f9d576affd7747cc3f179feb097d28990) using this command:

make-kpkg --rootcmd fakeroot --arch arm --cross-compile arm-linux-gnueabihf- --revision=1.0 kernel_image kernel_headers

contained files in /usr/src/linux-headers-<version>/scripts/mod/ that have been compiled for the host architecture, not for the target one. It complicates building new modules with the libraries.

There were many x86_64 binaries, so here is only and example from my test:

root@turris:~# file /usr/src/linux-headers-4.10.0-rc4+/scripts/mod/modpost
/usr/src/linux-headers-4.10.0-rc4+/scripts/mod/modpost: ELF 64-bit LSB shared object, x86-64, version 1 (SYSV), dynamically linked, interpreter /lib64/ld-linux-x86-64.so.2, for GNU/Linux 2.6.32, BuildID[sha1]=bd976cc4c263e4ebd659ce143d8f9eebcb39b518, stripped