/usr/lib/petscdir/3.7.7/x86_64-linux-gnu-real-debug/include/petsc/finclude/petscao.h is in libpetsc3.7.7-dbg 3.7.7+dfsg1-2build5.
This file is owned by root:root, with mode 0o644.
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!
! Include file for Fortran use of the AO (application ordering) package in PETSc
!
#include "petsc/finclude/petscaodef.h"
!
! End of Fortran include file for the AO package in PETSc
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