Ok, doing a
apt-mark hold libc6 libc6-dev libc-dev-bin[code]
results in
The following NEW packages will be installed:
linux-headers-3.15-1.towo-siduction-amd64 linux-image-3.15-1.towo-siduction-amd64
The following packages have been kept back:
libc-dev-bin libc6 libc6:i386 libc6-dev libc6-dev-i386 libc6-dev-x32 libc6-i386 libc6-i686:i386 libc6-x32
The following packages will be upgraded:
acpid binutils console-data cpp-4.9 dictionaries-common file firmware-linux-nonfree firmware-realtek g++-4.9 g++-4.9-multilib gcc-4.9
gcc-4.9-base gcc-4.9-base:i386 gcc-4.9-multilib iproute iproute2 lib32asan1 lib32atomic1 lib32cilkrts5 lib32gcc-4.9-dev lib32gcc1
lib32gomp1 lib32itm1 lib32quadmath0 lib32stdc++-4.9-dev lib32stdc++6 lib32ubsan0 lib32vtv0 libasan1 libatomic1 libc-bin libcilkrts5
libclamav6 libelf1 libgcc-4.9-dev libgcc1 libgcc1:i386 libgfortran3 libgomp1 libgssapi-krb5-2 libitm1 libk5crypto3 libkrb5-3
libkrb5support0 liblcms2-2 libllvm3.4 liblsan0 libmagic1 libqt4-dbus libqt4-declarative libqt4-designer libqt4-dev libqt4-dev-bin
libqt4-help libqt4-network libqt4-opengl libqt4-qt3support libqt4-script libqt4-scripttools libqt4-sql libqt4-sql-mysql libqt4-sql-sqlite
libqt4-svg libqt4-test libqt4-xml libqt4-xmlpatterns libqtcore4 libqtdbus4 libqtgui4 libquadmath0 libserf-1-1 libsqlite3-0
libstdc++-4.9-dev libstdc++6 libtasn1-6 libtsan0 libubsan0 libusb-1.0-0 libvtv0 libx32asan1 libx32atomic1 libx32cilkrts5 libx32gcc-4.9-dev
libx32gcc1 libx32gomp1 libx32itm1 libx32quadmath0 libx32stdc++-4.9-dev libx32stdc++6 libx32ubsan0 libx32vtv0 libyaml-perl
linux-headers-siduction-amd64 linux-image-siduction-amd64 linux-libc-dev locales multiarch-support python-mutagen qdbus qt4-linguist-tools
qt4-qmake qtcore4-l10n traceroute
103 upgraded, 2 newly installed, 0 to remove and 9 not upgraded.
Need to get 109 MB of archives.
After this operation, 144 MB of additional disk space will be used.
Do you want to continue? [Y/n]
I posted this separate to bluelupo's thread, because I did not see the same output