dg.exp

this is a gcc file, you can download it and learn its usetility, for further detail please look at t

#   Copyright (C) 1997 Free Software Foundation, Inc.

# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
# 
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
# 
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  

# GCC testsuite that uses the `dg.exp' driver.

# Load support procs.
load_lib g77-dg.exp

# If a testcase doesn't have special options, use these.
global DEFAULT_FFLAGS
if ![info exists DEFAULT_FFLAGS] then {
    set DEFAULT_FFLAGS " -pedantic-errors"
}

# Initialize `dg'.
dg-init

# Main loop.
g77-dg-runtest [lsort [glob -nocomplain $srcdir/$subdir/*.f]] \
	$DEFAULT_FFLAGS

# All done.
dg-finish