This file is indexed.

/etc/mpich2/mpif90.conf is in libmpich2-dev 1.4.1-1ubuntu1.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

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#! /bin/sh
#
# This file contains configuration information for mpicc.  This is
# essentially just the variable-initialization part of mpif90.
# --------------------------------------------------------------------------
# Set the default values of all variables.
#
# Directory locations: Fixed for any MPI implementation.
# Set from the directory arguments to configure (e.g., --prefix=/usr
prefix=/usr
exec_prefix=/usr
sysconfdir=/etc/mpich2
includedir=/usr/include/mpich2
modincdir=/usr/include/mpich2
libdir=/usr/lib

# Default settings for compiler, flags, and libraries
# Determined by a combination of environment variables and tests within
# configure (e.g., determining whehter -lsocket is needee)
FC="gfortran"
FCCPP=""
# Fortran 90 Compiler characteristics
FCINC="-I"
# f90modinc specifies how to add a directory to the search path for modules.
# Some compilers (Intel ifc version 5) do not support this concept, and 
# instead need 
# a specific list of files that contain module names and directories.
# The FCMODINCSPEC is a more general approach that uses <dir> and <file>
# for the directory and file respectively.
FCMODINC="-I"
FCMODINCSPEC=""
FCEXT="f90"
FCFLAGS=" "
LDFLAGS=" -Wl,-Bsymbolic-functions -Wl,-z,relro "
LIBS="-lopa -lmpl  -lrt -lcr -lpthread  "
MPILIBNAME="mpich"
PMPILIBNAME="pmpich"
NEEDSPLIB="no"
# MPICH2_VERSION is the version of the MPICH2 library that mpicc is intended for
MPICH2_VERSION="1.4.1"