/usr/lib/ is in ccontrol 1.0-1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/ccontrol/
/usr/lib/ccontrol/x86_64-linux-gnu-gcc-4.6
/usr/lib/ccontrol/g++-4.6
/usr/lib/ccontrol/x86_64-linux-gnu-g++
/usr/lib/ccontrol/g++
/usr/lib/ccontrol/x86_64-linux-gnu-gcc
/usr/lib/ccontrol/x86_64-linux-gnu-g++-4.4
/usr/lib/ccontrol/make
/usr/lib/ccontrol/g++-4.5
/usr/lib/ccontrol/g++-4.4
/usr/lib/ccontrol/gcc-4.4
/usr/lib/ccontrol/x86_64-linux-gnu-gcc-4.4
/usr/lib/ccontrol/x86_64-linux-gnu-g++-4.6
/usr/lib/ccontrol/ld
/usr/lib/ccontrol/gcc
/usr/lib/ccontrol/gcc-4.5
/usr/lib/ccontrol/x86_64-linux-gnu-gcc-4.5
/usr/lib/ccontrol/c++
/usr/lib/ccontrol/x86_64-linux-gnu-g++-4.5
/usr/lib/ccontrol/cc
/usr/lib/ccontrol/gcc-4.6