/usr/share/ is in gnat-7-x86-64-linux-gnux32 7.3.0-16ubuntu3cross1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/man/man1/x86_64-linux-gnux32-gnatlink.1.gz
/usr/share/man/man1/x86_64-linux-gnux32-gnatls-7.1.gz
/usr/share/man/man1/x86_64-linux-gnux32-gnatls.1.gz
/usr/share/man/man1/x86_64-linux-gnux32-gnatmake-7.1.gz
/usr/share/doc/
/usr/share/doc/gcc-7-x86-64-linux-gnux32-base/
/usr/share/doc/gcc-7-x86-64-linux-gnux32-base/ada/
/usr/share/doc/gcc-7-x86-64-linux-gnux32-base/ada/ChangeLog.gz
/usr/share/lintian/
/usr/share/lintian/overrides/
/usr/share/lintian/overrides/gnat-7-x86-64-linux-gnux32
/usr/share/man/
/usr/share/man/man1/
/usr/share/man/man1/x86_64-linux-gnux32-gnat-7.1.gz
/usr/share/doc/gnat-7-x86-64-linux-gnux32
/usr/share/man/man1/x86_64-linux-gnux32-gnat.1.gz
/usr/share/man/man1/x86_64-linux-gnux32-gnatbind-7.1.gz
/usr/share/man/man1/x86_64-linux-gnux32-gnatbind.1.gz
/usr/share/man/man1/x86_64-linux-gnux32-gnatchop-7.1.gz
/usr/share/man/man1/x86_64-linux-gnux32-gnatchop.1.gz
/usr/share/man/man1/x86_64-linux-gnux32-gnatclean-7.1.gz
/usr/share/man/man1/x86_64-linux-gnux32-gnatclean.1.gz
/usr/share/man/man1/x86_64-linux-gnux32-gnatfind-7.1.gz
/usr/share/man/man1/x86_64-linux-gnux32-gnatfind.1.gz
/usr/share/man/man1/x86_64-linux-gnux32-gnatgcc.1.gz
/usr/share/man/man1/x86_64-linux-gnux32-gnathtml-7.1.gz
/usr/share/man/man1/x86_64-linux-gnux32-gnathtml.1.gz
/usr/share/man/man1/x86_64-linux-gnux32-gnatkr-7.1.gz
/usr/share/man/man1/x86_64-linux-gnux32-gnatkr.1.gz
/usr/share/man/man1/x86_64-linux-gnux32-gnatlink-7.1.gz
/usr/share/man/man1/x86_64-linux-gnux32-gnatmake.1.gz
/usr/share/man/man1/x86_64-linux-gnux32-gnatname-7.1.gz
/usr/share/man/man1/x86_64-linux-gnux32-gnatname.1.gz
/usr/share/man/man1/x86_64-linux-gnux32-gnatprep-7.1.gz
/usr/share/man/man1/x86_64-linux-gnux32-gnatprep.1.gz
/usr/share/man/man1/x86_64-linux-gnux32-gnatxref-7.1.gz
/usr/share/man/man1/x86_64-linux-gnux32-gnatxref.1.gz