dejagnu/runtest.exp

# runtest.exp -- Test framework driver
# Copyright (C) 1992-2019, 2020 Free Software Foundation, Inc.
#
# This file is part of DejaGnu.
#
# DejaGnu 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 3 of the License, or
# (at your option) any later version.
#
# DejaGnu 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 DejaGnu; if not, write to the Free Software Foundation,
# Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.

# This file was written by Rob Savoye <rob@welcomehome.org>.

set frame_version	1.6.3-rc4
if {![info exists argv0]} {
    send_error "Must use a version of Expect greater than 5.0\n"
    exit 1
}

# trap some signals so we know whats happening. These definitions are only
# temporary until we read in the library stuff
#
trap { send_user "\ninterrupted by user\n"; exit 130 } SIGINT
trap { send_user "\nquit\n";                exit 131 } SIGQUIT
trap { send_user "\nterminated\n";          exit 143 } SIGTERM

#
# Initialize a few global variables used by all tests.
# `reset_vars' resets several of these, we define them here to document their
# existence.  In fact, it would be nice if all globals used by some interface
# of dejagnu proper were documented here.
#
# Keep these all lowercase.  Interface variables used by the various
# testsuites (eg: the gcc testsuite) should be in all capitals
# (eg: TORTURE_OPTIONS).
#
set mail_logs   0		;# flag for mailing of summary and diff logs
set psum_file   "latest"	;# file name of previous summary to diff against

set exit_status	0		;# exit code returned by this program

set xfail_flag  0		;# indicates that a failure is expected
set xfail_prms	0		;# GNATS prms id number for this expected failure
set kfail_flag  0		;# indicates that it is a known failure
set kfail_prms	0		;# bug id for the description of the known failure
set sum_file	""		;# name of the file that contains the summary log
set base_dir	""		;# the current working directory
set xml_file    ""              ;# handle on the XML file if requested
set xml         0               ;# flag for requesting xml
set logname     ""		;# the users login name
set prms_id	0               ;# GNATS prms id number
set bug_id	0               ;# optional bug id number
set dir		""		;# temp variable for directory names
set srcdir      "."		;# source directory containing the test suite
set ignoretests ""		;# list of tests to not execute
set objdir	"."		;# directory where test case binaries live
set reboot      0
set multipass   ""		;# list of passes and var settings
set errno	"";		;#
set exit_error  1		;# Toggle for whether to set the exit status
				;# on Tcl bugs in test case drivers.
#
# These describe the host and target environments.
#
set build_triplet  ""		;# type of architecture to run tests on
set build_os	   ""		;# type of os the tests are running on
set build_vendor   ""		;# vendor name of the OS or workstation the test are running on
set build_cpu      ""		;# type of the cpu tests are running on
set host_triplet   ""		;# type of architecture to run tests on, sometimes remotely
set host_os	   ""		;# type of os the tests are running on
set host_vendor    ""		;# vendor name of the OS or workstation the test are running on
set host_cpu       ""		;# type of the cpu tests are running on
set target_triplet ""		;# type of architecture to run tests on, final remote
set target_os	   ""		;# type of os the tests are running on
set target_vendor  ""		;# vendor name of the OS or workstation the test are running on
set target_cpu     ""		;# type of the cpu tests are running on
set target_alias   ""		;# standard abbreviation of target
set compiler_flags ""		;# the flags used by the compiler

#
# These set configuration file names and are local to this file.
#
set local_init_file	site.exp	;# testsuite-local init file name
set global_init_file	site.exp	;# global init file name

#
# These are used to locate parts of the testsuite.
#
set testsuitedir	"testsuite"	;# top-level testsuite source directory
set testbuilddir	"testsuite"	;# top-level testsuite object directory

#
# Collected errors
#
namespace eval ::dejagnu::error {
    # list of { file message errorCode errorInfo } lists
    variable list [list]
}

# Various ccache versions provide incorrect debug info such as ignoring
# different current directory, breaking GDB testsuite.
set env(CCACHE_DISABLE) 1
unset -nocomplain env(CCACHE_NODISABLE)

#
# some convenience abbreviations
#
set hex "0x\[0-9A-Fa-f\]+"
set decimal "\[0-9\]+"

#
# set the base dir (current working directory)
#
set base_dir [pwd]

#
# These are set here instead of the init module so they can be overridden
# by command line options.
#
set all_flag	0
set binpath	""
set debug	0
set options	""
set outdir	"."
set reboot	1
set tracelevel	0
set verbose	0
set log_dialog	0

#
# verbose [-n] [-log] [--] message [level]
#
# Print MESSAGE if the verbose level is >= LEVEL.
# The default value of LEVEL is 1.
# "-n" says to not print a trailing newline.
# "-log" says to add the text to the log file even if it won't be printed.
# Note that the apparent behaviour of `send_user' dictates that if the message
# is printed it is also added to the log file.
# Use "--" if MESSAGE begins with "-".
#
# This is defined here rather than in framework.exp so we can use it
# while still loading in the support files.
#
proc verbose { args } {
    global verbose
    set newline 1
    set logfile 0

    set i 0
    if { [string index [lindex $args 0] 0] eq "-" } {
	for { set i 0 } { $i < [llength $args] } { incr i } {
	    if { [lindex $args $i] eq "--" } {
		incr i
		break
	    } elseif { [lindex $args $i] eq "-n" } {
		set newline 0
	    } elseif { [lindex $args $i] eq "-log" } {
		set logfile 1
	    } elseif { [lindex $args $i] eq "-x" } {
		set xml 1
	    } elseif { [string index [lindex $args $i] 0] eq "-" } {
		clone_output "ERROR: verbose: illegal argument: [lindex $args $i]"
		return
	    } else {
		break
	    }
	}
	if { [llength $args] == $i } {
	    clone_output "ERROR: verbose: nothing to print"
	    return
	}
    }

    set level 1
    if { [llength $args] > $i + 1 } {
	set level [lindex $args [expr { $i + 1 }]]
    }
    set message [lindex $args $i]

    if { $verbose >= $level } {
	# We assume send_user also sends the text to the log file (which
	# appears to be the case though the docs aren't clear on this).
	if { $newline } {
	    send_user -- "$message\n"
	} else {
	    send_user -- $message
	}
    } elseif { $logfile } {
	if { $newline } {
	    send_log -- "$message\n"
	} else {
	    send_log -- $message
	}
    }
}

#
# Transform a tool name to get the installed name.
# target_triplet is the canonical target name.  target_alias is the
# target name used when configure was run.
#
proc transform { name } {
    global target_triplet
    global target_alias
    global host_triplet
    global board

    if { $target_triplet eq $host_triplet } {
	return $name
    }
    if { $target_triplet eq "native" } {
	return $name
    }
    if {[board_info host exists no_transform_name]} {
	return $name
    }
    if { $target_triplet eq "" } {
	return $name
    } else {
	if {[info exists board]} {
	    if {[board_info $board exists target_install]} {
		set target_install [board_info $board target_install]
	    }
	}
	if {[target_info exists target_install]} {
	    set target_install [target_info target_install]
	}
	if {[info exists target_alias]} {
	    set tmp $target_alias-$name
	} elseif {[info exists target_install]} {
	    if { [lsearch -exact $target_install $target_alias] >= 0 } {
		set tmp $target_alias-$name
	    } else {
		set tmp "[lindex $target_install 0]-$name"
	    }
	}
	verbose "Transforming $name to $tmp"
	return $tmp
    }
}

#
# findfile arg0 [arg1] [arg2]
#
# Find a file and see if it exists. If you only care about the false
# condition, then you'll need to pass a null "" for arg1.
#	arg0 is the filename to look for. If the only arg,
#            then that's what gets returned. If this is the
#            only arg, then if it exists, arg0 gets returned.
#            if it doesn't exist, return only the prog name.
#       arg1 is optional, and it's what gets returned if
#	     the file exists.
#       arg2 is optional, and it's what gets returned if
#            the file doesn't exist.
#
proc findfile { args } {
    # look for the file
    verbose "Seeing if [lindex $args 0] exists." 2
    if {[file exists [lindex $args 0]]} {
	if { [llength $args] > 1 } {
	    verbose "Found file, returning [lindex $args 1]"
	    return [lindex $args 1]
	} else {
	    verbose "Found file, returning [lindex $args 0]"
	    return [lindex $args 0]
	}
    } else {
	if { [llength $args] > 2 } {
	    verbose "Didn't find file [lindex $args 0], returning [lindex $args 2]"
	    return [lindex $args 2]
	} else {
	    verbose "Didn't find file, returning [file tail [lindex $args 0]]"
	    return [transform [file tail [lindex $args 0]]]
	}
    }
}

#
# load_file [-1] [--] file1 [ file2 ... ]
#
# Utility to source a file.  All are sourced in order unless the flag "-1"
# is given in which case we stop after finding the first one.
# The result is 1 if a file was found, 0 if not.
# If a tcl error occurs while sourcing a file, we print an error message
# and exit.
#
proc load_file { args } {
    set i 0
    set only_one 0
    if { [lindex $args $i] eq "-1" } {
	set only_one 1
	incr i
    }
    if { [lindex $args $i] eq "--" } {
	incr i
    }

    set found 0
    foreach file [lrange $args $i end] {
	verbose "Looking for $file" 2
	# In Tcl, "file exists" fails if the filename looks like
	# ~/FILE and the environment variable HOME does not exist.
	if {! [catch {file exists $file} result] && $result} {
	    set found 1
	    verbose "Found $file"
	    if { [catch "uplevel #0 source $file"] == 1 } {
		send_error "ERROR: tcl error sourcing $file.\n"
		global errorInfo
		if {[info exists errorInfo]} {
		    send_error "$errorInfo\n"
		}
		exit 1
	    }
	    if { $only_one } {
		break
	    }
	}
    }
    return $found
}

#
# search_and_load_file -- search DIRLIST looking for FILELIST.
# TYPE is used when displaying error and progress messages.
#
proc search_and_load_file { type filelist dirlist } {
    set found 0

    foreach dir $dirlist {
	foreach initfile $filelist {
	    set filename [file join $dir $initfile]
	    verbose "Looking for $type $filename" 2
	    if {[file exists $filename]} {
		set found 1
		set error ""
		if { $type ne "library file" } {
		    send_user "Using $filename as $type.\n"
		} else {
		    verbose "Loading $filename"
		}
		if {[catch "uplevel #0 source $filename" error] == 1} {
		    global errorInfo
		    send_error "ERROR: tcl error sourcing $type $filename.\n$error\n"
		    if {[info exists errorInfo]} {
			send_error "$errorInfo\n"
		    }
		    exit 1
		}
		break
	    }
	}
	if { $found } {
	    break
	}
    }
    return $found
}

#
# Give a usage statement.
#
proc usage { } {
    global tool

    send_user "USAGE: runtest \[options...\]\n"
    send_user "\t--all, -a\t\tPrint all test output to screen\n"
    send_user "\t--build \[triplet\]\tThe canonical triplet of the build machine\n"
    send_user "\t--debug\t\t\tSet expect debugging ON\n"
    send_user "\t--directory name\tRun only the tests in directory 'name'\n"
    send_user "\t--global_init \[name\]\tThe file to load for global configuration\n"
    send_user "\t--help\t\t\tPrint help text\n"
    send_user "\t--host \[triplet\]\tThe canonical triplet of the host machine\n"
    send_user "\t--host_board \[name\]\tThe host board to use\n"
    send_user "\t--ignore \[name(s)\]\tThe names of specific tests to ignore\n"
    send_user "\t--local_init \[name\]\tThe file to load for local configuration\n"
    send_user "\t--log_dialog\t\t\Emit Expect output on stdout\n"
    send_user "\t--mail \[name(s)\]\tWhom to mail the results to\n"
    send_user "\t--objdir \[name\]\t\tThe test suite binary directory\n"
    send_user "\t--outdir \[name\]\t\tThe directory to put logs in\n"
    send_user "\t--reboot\t\tReboot the target (if supported)\n"
    send_user "\t--srcdir \[name\]\t\tThe test suite source code directory\n"
    send_user "\t--status\t\tSet the exit status to fail on Tcl errors\n"
    send_user "\t--strace \[number\]\tTurn on Expect tracing\n"
    send_user "\t--target \[triplet\]\tThe canonical triplet of the target board\n"
    send_user "\t--target_board \[name(s)\] The list of target boards to run tests on\n"
    send_user "\t--tool \[name(s)\]\tRun tests on these tools\n"
    send_user "\t--tool_exec \[name\]\tThe path to the tool executable to test\n"
    send_user "\t--tool_opts \[options\]\tA list of additional options to pass to the tool\n"
    send_user "\t--verbose, -v\t\tProduce verbose output\n"
    send_user "\t--version, -V\t\tPrint all relevant version numbers\n"
    send_user "\t--xml, -x\t\tWrite out an XML results file\n"
    send_user "\t--D\[0-1\]\t\tTcl debugger\n"
    send_user "\tscript.exp\[=arg(s)\]\tRun these tests only\n"
    if { [info exists tool] } {
	if { [info procs ${tool}_option_help] ne "" } {
	    ${tool}_option_help
	}
    }
}

#
# Parse the arguments the first time looking for these.  We will ultimately
# parse them twice.  Things are complicated because:
# - we want to parse --verbose early on
# - we don't want config files to override command line arguments
#   (eg: $base_dir/$local_init_file vs --host/--target)
# - we need some command line arguments before we can process some config files
#   (eg: --objdir before $objdir/$local_init_file, --host/--target before $DEJAGNU)
# The use of `arg_host_triplet' and `arg_target_triplet' lets us avoid parsing
# the arguments three times.
#

namespace eval ::dejagnu::command_line {
    variable cmd_var_list [list]

    proc save_cmd_var {name} {
	variable cmd_var_list

	upvar 1 $name target_var
	lappend cmd_var_list $name $target_var
    }

    proc restore_cmd_vars {} {
	variable cmd_var_list

	foreach {name value} $cmd_var_list {
	    uplevel 1 set $name $value
	}
	verbose "Variables set by command line arguments restored." 4
    }

    proc dump_cmd_vars {} {
	variable cmd_var_list

	verbose "Variables set by command line arguments:" 4
	foreach {name value} $cmd_var_list {
	    verbose "  $name -> $value" 4
	}
    }
}

set arg_host_triplet ""
set arg_target_triplet ""
set arg_build_triplet ""
set argc [ llength $argv ]
for { set i 0 } { $i < $argc } { incr i } {
    set option [lindex $argv $i]

    # make all options have two hyphens
    switch -glob -- $option {
	"--*" {
	}
	"-*" {
	    set option "-$option"
	}
    }

    # split out the argument for options that take them
    switch -glob -- $option {
	"--*=*" {
	    regexp {^[^=]*=(.*)$} $option nil optarg
	}
	"--bu*" -
	"--g*" -
	"--ho*" -
	"--ig*"  -
	"--loc*" -
	"--m*"  -
	"--ob*" -
	"--ou*" -
	"--sr*" -
	"--str*" -
	"--ta*" -
	"--di*" -
	"--to*" {
	    incr i
	    set optarg [lindex $argv $i]
	}
    }

    switch -glob -- $option {
	"--V*" -
	"--vers*" {			# (--version) version numbers
	    send_user "DejaGnu version\t$frame_version\n"
	    send_user "Expect version\t[exp_version]\n"
	    send_user "Tcl version\t[ info tclversion ]\n"
	    exit 0
	}

	"--bu*" {			# (--build) the build host configuration
	    set arg_build_triplet $optarg
	    ::dejagnu::command_line::save_cmd_var arg_build_triplet
	    continue
	}

	"--g*" {			# (--global_init) the global init file name
	    set global_init_file $optarg
	    ::dejagnu::command_line::save_cmd_var global_init_file
	    continue
	}

	"--host_bo*" {
	    set host_board $optarg
	    ::dejagnu::command_line::save_cmd_var host_board
	    continue
	}

	"--ho*" {			# (--host) the host configuration
	    set arg_host_triplet $optarg
	    ::dejagnu::command_line::save_cmd_var arg_host_triplet
	    continue
	}

	"--loc*" {			# (--local_init) the local init file name
	    set local_init_file $optarg
	    ::dejagnu::command_line::save_cmd_var local_init_file
	    continue
	}

	"--ob*" {			# (--objdir) where the test case object code lives
	    set objdir $optarg
	    ::dejagnu::command_line::save_cmd_var objdir
	    continue
	}

	"--sr*" {			# (--srcdir) where the testsuite source code lives
	    set srcdir $optarg
	    ::dejagnu::command_line::save_cmd_var srcdir
	    continue
	}

	"--target_bo*" {
	    set target_list $optarg
	    ::dejagnu::command_line::save_cmd_var target_list
	    continue
	}

	"--ta*" {			# (--target) the target configuration
	    set arg_target_triplet $optarg
	    ::dejagnu::command_line::save_cmd_var arg_target_triplet
	    continue
	}

	"--tool_opt*" {
	    set TOOL_OPTIONS $optarg
	    ::dejagnu::command_line::save_cmd_var TOOL_OPTIONS
	    continue
	}

	"--tool_exec*" {
	    set TOOL_EXECUTABLE $optarg
	    ::dejagnu::command_line::save_cmd_var TOOL_EXECUTABLE
	    continue
	}

	"--to*" {			# (--tool) specify tool name
	    set tool $optarg
	    set comm_line_tool $optarg
	    ::dejagnu::command_line::save_cmd_var tool
	    ::dejagnu::command_line::save_cmd_var comm_line_tool
	    continue
	}

	"--di*" {
	    set cmdline_dir_to_run $optarg
	    ::dejagnu::command_line::save_cmd_var cmdline_dir_to_run
	    continue
	}

	"--v" -
	"--verb*" {			# (--verbose) verbose output
	    incr verbose
	    continue
	}

	"[A-Z0-9_-.]*=*" { # process makefile style args like CC=gcc, etc...
	    if {[regexp "^(\[A-Z0-9_-\]+)=(.*)$" $option junk var val]} {
		set $var $val
		verbose "$var is now $val"
		append makevars "set $var $val;" ;# FIXME: Used anywhere?
		unset junk var val
	    } else {
		send_error "Illegal variable specification:\n"
		send_error "$option\n"
	    }
	    continue
	}

    }
}
verbose "Verbose level is $verbose"

verbose [concat "Initial working directory is" [pwd]]

::dejagnu::command_line::dump_cmd_vars

#
# get the users login name
#
if { $logname eq "" } {
    if {[info exists env(USER)]} {
	set logname $env(USER)
    } else {
	if {[info exists env(LOGNAME)]} {
	    set logname $env(LOGNAME)
	} else {
	    # try getting it with whoami
	    catch "set logname [exec whoami]" tmp
	    if {[string match "*couldn't find*to execute*" $tmp]} {
		# try getting it with who am i
		unset tmp
		catch "set logname [exec who am i]" tmp
		if {[string match "*Command not found*" $tmp]} {
		    send_user "ERROR: couldn't get the users login name\n"
		    set logname "Unknown"
		} else {
		    set logname [lindex [split $logname " !"] 1]
		}
	    }
	}
    }
}

verbose "Login name is $logname"

#
# lookfor_file -- try to find a file by searching up multiple directory levels
#
proc lookfor_file { dir name } {
    foreach x [list . .. ../.. ../../.. ../../../..] {
	verbose $dir/$x/$name 2
	if {[file exists [file join $dir $name]]} {
	    return [file join $dir $name]
	}
	set dir [remote_file build dirname $dir]
    }
    return ""
}

#
# load_lib -- load a library by sourcing it
#
# If there a multiple files with the same name, stop after the first one found.
# The order is first look in the install dir, then in a parallel dir in the
# source tree (up one or two levels), then in the current dir.
#
proc load_lib { file } {
    global verbose execpath tool
    global libdir libdirs srcdir testsuitedir base_dir
    global loaded_libs

    if {[info exists loaded_libs($file)]} {
	return
    }

    set loaded_libs($file) ""
    set search_dirs [list ../lib $libdir $libdir/lib]
    lappend search_dirs [file dirname [file dirname $srcdir]]/dejagnu/lib
    lappend search_dirs $testsuitedir/lib
    lappend search_dirs $execpath/lib "."
    lappend search_dirs [file dirname [file dirname [file dirname $srcdir]]]/dejagnu/lib
    if {[info exists libdirs]} {
	lappend search_dirs $libdirs
    }
    if { [search_and_load_file "library file" $file $search_dirs ] == 0 } {
	send_error "ERROR: Couldn't find library file $file.\n"
	exit 1
    }
}

#
# Begin sourcing the config files.
# All are sourced in order.
#
# Search order:
#    (local)	$base_dir/$local_init_file -> $objdir/$local_init_file ->
#    (global)	installed($global_init_file) -> $DEJAGNU -> $HOME/.dejagnurc
#
# For the normal case, we expect $base_dir/$local_init_file to set
# host_triplet and target_triplet.
#

load_file [file join $base_dir $local_init_file]

# Ensure that command line parameters override testsuite init files.
::dejagnu::command_line::restore_cmd_vars

#
# If objdir didn't get set in $base_dir/$local_init_file, set it to
# $base_dir.  Make sure we source $objdir/$local_init_file in case
# $base_dir/$local_init_file doesn't exist and objdir was given on the
# command line.
#

if { $objdir eq "." || $objdir eq $srcdir } {
    set objdir $base_dir
} else {
    load_file [file join $objdir $local_init_file]
}

# Ensure that command line parameters override testsuite init files.
::dejagnu::command_line::restore_cmd_vars

#
# Find the testsuite.
#

# The DejaGnu manual has always stated that a testsuite must be in a
# testsuite/ subdirectory.

verbose "Finding testsuite ..." 3
verbose "\$base_dir -> $base_dir" 3
verbose "\$srcdir -> $srcdir" 3
verbose "\$objdir -> $objdir" 3
verbose [concat "file tail \$srcdir -> " [file tail $srcdir]] 3
verbose [concat "file join \$srcdir testsuite -> " \
	     [file join $srcdir testsuite]] 3
verbose [concat "file isdirectory [file join \$srcdir testsuite] -> " \
	     [file isdirectory [file join $srcdir testsuite]]] 3
verbose [concat "file tail \$base_dir -> " [file tail $base_dir]] 3

if { [file tail $srcdir] eq "testsuite" } {
    # Subdirectory case -- $srcdir includes testsuite/
    set testsuitedir $srcdir
    set testbuilddir $objdir
} elseif { [file tail $srcdir] ne "testsuite"
	   && [file isdirectory [file join $srcdir testsuite]] } {
    # Top-level case -- testsuite in $srcdir/testsuite/
    set testsuitedir [file join $srcdir testsuite]
    set testbuilddir [file join $objdir testsuite]
} elseif { $srcdir eq "." && [file tail $base_dir] eq "testsuite" } {
    # Development scaffold case -- testsuite in ".", but "." is "testsuite"
    set testsuitedir $base_dir
    set testbuilddir $base_dir
} else {
    if { $testsuitedir eq "testsuite" && $srcdir eq "." && $objdir eq "." } {
	# Broken legacy case -- testsuite not actually in testsuite/
	# Produce a warning, but continue.
	send_error "WARNING: testsuite is not in a testsuite/ directory.\n"
	set testsuitedir $srcdir
	set testbuilddir $objdir
    } else {
	# Custom case -- all variables are assumed to have been set correctly
    }
}

verbose "Finding testsuite ... done" 3

# Well, this just demonstrates the real problem...
if {![info exists tool_root_dir]} {
    set tool_root_dir [file dirname $objdir]
    if {[file exists [file join $tool_root_dir testsuite]]} {
	set tool_root_dir [file dirname $tool_root_dir]
    }
}

verbose "Using test sources in $srcdir"
verbose "Using test binaries in $objdir"
verbose "Testsuite root is $testsuitedir"
verbose "Tool root directory is $tool_root_dir"

set execpath [file dirname $argv0]

# The runtest.exp file is installed directly in libdir.
# Conveniently, the source tree layout is the same as the installed libdir.
set libdir [file dirname $argv0]
if {[info exists env(DEJAGNULIBS)]} {
    set libdir $env(DEJAGNULIBS)
}
# list of extra search directories used by load_lib to look for libs
set libdirs {}

verbose "Using $libdir to find libraries"

#
# If the host or target was given on the command line, override the above
# config files.  We allow $DEJAGNU to massage them though in case it would
# ever want to do such a thing.
#
if { $arg_host_triplet ne "" } {
    set host_triplet $arg_host_triplet
}
if { $arg_build_triplet ne "" } {
    set build_triplet $arg_build_triplet
}

# If we only specify --host, then that must be the build machine too,
# and we're stuck using the old functionality of a simple cross test.
if {[expr { $build_triplet eq ""  &&  $host_triplet ne "" } ]} {
    set build_triplet $host_triplet
}
# If we only specify --build, then we'll use that as the host too.
if {[expr { $build_triplet ne "" && $host_triplet eq "" } ]} {
    set host_triplet $build_triplet
}
unset arg_host_triplet arg_build_triplet

#
# If the build machine type hasn't been specified by now, use config.guess.
#

if {[expr {$build_triplet eq "" && $host_triplet eq ""}]} {
    # find config.guess
    foreach dir [list $libdir $libdir/libexec $libdir/.. $execpath $srcdir $srcdir/.. $srcdir/../..] {
	verbose "Looking for $dir/config.guess" 2
	if {[file exists [file join $dir config.guess]]} {
	    set config_guess [file join $dir config.guess]
	    verbose "Found [file join $dir config.guess]"
	    break
	}
    }

    # get the canonical triplet
    if {![info exists config_guess]} {
	send_error "ERROR: Couldn't find config.guess program.\n"
	exit 1
    }
    if { [info exists ::env(CONFIG_SHELL)] } {
	if { [catch {exec $::env(CONFIG_SHELL) $config_guess} build_triplet] } {
	    if { [lindex $::errorCode 0] eq "CHILDSTATUS" } {
		send_error "ERROR: Running config.guess with\
					CONFIG_SHELL=$::env(CONFIG_SHELL)\
					exited on code\
					[lindex $::errorCode 2].\n"
	    } else {
		send_error "ERROR: Running config.guess with\
					CONFIG_SHELL=$::env(CONFIG_SHELL)\
					produced error:\n"
		send_error "        $::errorCode\n"
	    }
	}
    } elseif { [info exists ::env(SHELL)] } {
	if { [catch {exec $::env(SHELL) $config_guess} build_triplet] } {
	    if { [lindex $::errorCode 0] eq "CHILDSTATUS" } {
		send_error "ERROR: Running config.guess with\
					SHELL=$::env(SHELL)\
					exited on code\
					[lindex $::errorCode 2].\n"
	    } else {
		send_error "ERROR: Running config.guess with\
					SHELL=$::env(SHELL)\
					produced error:\n"
		send_error "        $::errorCode\n"
	    }
	}
    } else {
	if { [catch {exec $config_guess} build_triplet] } {
	    if { [lindex $::errorCode 0] eq "CHILDSTATUS" } {
		send_error "ERROR: Running config.guess exited on code\
					[lindex $::errorCode 2].\n"
	    } else {
		send_error "ERROR: Running config.guess produced error:\n"
		send_error "        $::errorCode\n"
	    }
	}
    }
    if { ![regexp -- {^[[:alnum:]_.]+(-[[:alnum:]_.]+)+$} $build_triplet] } {
	send_error "ERROR: Running config.guess produced bogus build triplet:\n"
	send_error "        $build_triplet\n"
	send_error "       (Perhaps you need to set CONFIG_SHELL or\
				SHELL in your environment\n"
	send_error "        to the absolute file name of a POSIX shell?)\n"
	exit 1
    }
    verbose "Assuming build host is $build_triplet"
    if { $host_triplet eq "" } {
	set host_triplet $build_triplet
    }
}

#
# Figure out the target. If the target hasn't been specified, then we have to
# assume we are native.
#
if { $arg_target_triplet ne "" } {
    set target_triplet $arg_target_triplet
} elseif { $target_triplet eq "" } {
    set target_triplet $build_triplet
    verbose "Assuming native target is $target_triplet" 2
}
unset arg_target_triplet
#
# Default target_alias to target_triplet.
#
if {![info exists target_alias]} {
    set target_alias $target_triplet
}

proc get_local_hostname { } {
    if {[catch "info hostname" hb]} {
	set hb ""
    } else {
	regsub "\\..*$" $hb "" hb
    }
    verbose "hostname=$hb" 3
    return $hb
}

#
# We put these here so that they can be overridden later by site.exp or
# friends.
#
# Set up the target as machine NAME. We also load base-config.exp as a
# default configuration. The config files are sourced with the global
# variable $board set to the name of the current target being defined.
#
proc setup_target_hook { whole_name name } {
    global board
    global host_board

    if {[info exists host_board]} {
	set hb $host_board
    } else {
	set hb [get_local_hostname]
    }

    set board $whole_name

    global board_type
    set board_type "target"

    load_config base-config.exp
    if {![load_board_description $name $whole_name $hb]} {
	if { $name ne "unix" } {
	    perror "couldn't load description file for $name"
	    exit 1
	} else {
	    load_generic_config "unix"
	}
    }

    if {[board_info $board exists generic_name]} {
	load_tool_target_config [board_info $board generic_name]
    }

    unset board
    unset board_type

    push_target $whole_name

    if { [info procs ${whole_name}_init] ne "" } {
	${whole_name}_init $whole_name
    }

    if { ![isnative] && ![isremote target] } {
	global env build_triplet target_triplet
	if { (![info exists env(DEJAGNU)]) && ($build_triplet ne $target_triplet) } {
	    warning "Assuming target board is the local machine (which is probably wrong).\nYou may need to set your DEJAGNU environment variable."
	}
    }
}

#
# Clean things up afterwards.
#
proc cleanup_target_hook { name } {
    global tool
    # Clean up the target board.
    if { [info procs ${name}_exit] ne "" } {
	${name}_exit
    }
    # We also call the tool exit routine here.
    if {[info exists tool]} {
	if { [info procs ${tool}_exit] ne "" } {
	    ${tool}_exit
	}
    }
    remote_close target
    pop_target
}

proc setup_host_hook { name } {
    global board
    global board_info
    global board_type

    set board $name
    set board_type "host"

    load_board_description $name
    unset board
    unset board_type
    push_host $name
    if { [info procs ${name}_init] ne "" } {
	${name}_init $name
    }
}

proc setup_build_hook { name } {
    global board
    global board_info
    global board_type

    set board $name
    set board_type "build"

    load_board_description $name
    unset board
    unset board_type
    push_build $name
    if { [info procs ${name}_init] ne "" } {
	${name}_init $name
    }
}

#
# Find and load the global config file if it exists.
# The global config file is used to set the connect mode and other
# parameters specific to each particular target.
# These files assume the host and target have been set.
#

if { [load_file -- [file join $libdir $global_init_file]] == 0 } {
    # If $DEJAGNU isn't set either then there isn't any global config file.
    # Warn the user as there really should be one.
    if { ! [info exists env(DEJAGNU)] } {
	send_error "WARNING: Couldn't find the global config file.\n"
    }
}

if {[info exists env(DEJAGNU)]} {
    if { [load_file -- $env(DEJAGNU)] == 0 } {
	# It may seem odd to only issue a warning if there isn't a global
	# config file, but issue an error if $DEJAGNU is erroneously defined.
	# Since $DEJAGNU is set there is *supposed* to be a global config file,
	# so the current behaviour seems reasonable.
	send_error "ERROR: global config file $env(DEJAGNU) not found.\n"
	exit 1
    }
    if {![info exists boards_dir]} {
	set boards_dir "[file dirname $env(DEJAGNU)]/boards"
    }
}

# Load user .dejagnurc file last as the ultimate override.
load_file ~/.dejagnurc

if {![info exists boards_dir]} {
    set boards_dir ""
}

#
# parse out the config parts of the triplet name
#

# build values
if { $build_cpu eq "" } {
    regsub -- "-.*-.*" $build_triplet "" build_cpu
}
if { $build_vendor eq "" } {
    regsub -- "^\[a-z0-9\]*-" $build_triplet "" build_vendor
    regsub -- "-.*" $build_vendor "" build_vendor
}
if { $build_os eq "" } {
    regsub -- ".*-.*-" $build_triplet "" build_os
}

# host values
if { $host_cpu eq "" } {
    regsub -- "-.*-.*" $host_triplet "" host_cpu
}
if { $host_vendor eq "" } {
    regsub -- "^\[a-z0-9\]*-" $host_triplet "" host_vendor
    regsub -- "-.*" $host_vendor "" host_vendor
}
if { $host_os eq "" } {
    regsub -- ".*-.*-" $host_triplet "" host_os
}

# target values
if { $target_cpu eq "" } {
    regsub -- "-.*-.*" $target_triplet "" target_cpu
}
if { $target_vendor eq "" } {
    regsub -- "^\[a-z0-9\]*-" $target_triplet "" target_vendor
    regsub -- "-.*" $target_vendor "" target_vendor
}
if { $target_os eq "" } {
    regsub -- ".*-.*-" $target_triplet "" target_os
}

#
# Load the primary tool initialization file.
#

proc load_tool_init { file } {
    global srcdir testsuitedir
    global loaded_libs

    if {[info exists loaded_libs(tool/$file)]} {
	return
    }

    set loaded_libs(tool/$file) ""

    lappend searchpath [file join $testsuitedir lib tool]
    lappend searchpath [file join $testsuitedir lib]
    # for legacy testsuites that might have files in lib/ instead of
    # testsuite/lib/ in the package source tree; deprecated
    lappend searchpath [file join $srcdir lib]

    if { ![search_and_load_file "tool init file" [list $file] $searchpath] } {
	warning "Couldn't find tool init file"
    }
}

#
# load the testing framework libraries
#
load_lib utils.exp
load_lib framework.exp
load_lib debugger.exp
load_lib remote.exp
load_lib target.exp
load_lib targetdb.exp
load_lib libgloss.exp

# Initialize the test counters and reset them to 0.
init_testcounts
reset_vars

#
# Parse the command line arguments.
#

# Load the tool initialization file. Allow the --tool option to override
# what's set in the site.exp file.
if {[info exists comm_line_tool]} {
    set tool $comm_line_tool
}

if {[info exists tool]} {
    load_tool_init ${tool}.exp
}

set argc [ llength $argv ]
for { set i 0 } { $i < $argc } { incr i } {
    set option [ lindex $argv $i ]

    # make all options have two hyphens
    switch -glob -- $option {
	"--*" {
	}
	"-*" {
	    set option "-$option"
	}
    }

    # split out the argument for options that take them
    switch -glob -- $option {
	"--*=*" {
	    regexp {^[^=]*=(.*)$} $option nil optarg
	}
	"--bu*" -
	"--g*" -
	"--ho*" -
	"--ig*"  -
	"--loc*" -
	"--m*"  -
	"--ob*" -
	"--ou*" -
	"--sr*" -
	"--str*" -
	"--ta*" -
	"--di*" -
	"--to*" {
	    incr i
	    set optarg [lindex $argv $i]
	}
    }

    switch -glob -- $option {
	"--v*" {			# (--verbose) verbose output
	    # Already parsed.
	    continue
	}

	"--g*" {			# (--global_init) the global init file name
	    # Already parsed (and no longer useful).  The file has been loaded.
	    continue
	}

	"--loc*" {			# (--local_init) the local init file name
	    # Already parsed (and no longer useful).  The file has been loaded.
	    continue
	}

	"--bu*" {			# (--build) the build host configuration
	    # Already parsed (and don't set again).  Let $DEJAGNU rename it.
	    continue
	}

	"--ho*" {			# (--host) the host configuration
	    # Already parsed (and don't set again).  Let $DEJAGNU rename it.
	    continue
	}

	"--target_bo*" {
	    # Set it again, father knows best.
	    set target_list $optarg
	    continue
	}

	"--ta*" {			# (--target) the target configuration
	    # Already parsed (and don't set again).  Let $DEJAGNU rename it.
	    continue
	}

	"--a*" {			# (--all) print all test output to screen
	    set all_flag 1
	    verbose "Print all test output to screen"
	    continue
	}

	"--di*" {
	    # Already parsed (and don't set again).  Let $DEJAGNU rename it.
	    continue
	}


	"--de*" {			# (--debug) expect internal debugging
	    if {[file exists ./dbg.log]} {
		catch [file delete -force -- dbg.log]
	    }
	    if { $verbose > 2 } {
		exp_internal -f dbg.log 1
	    } else {
		exp_internal -f dbg.log 0
	    }
	    verbose "Expect Debugging is ON"
	    continue
	}

	"--D[01]" {			# (-Debug) turn on Tcl debugger
	    # The runtest shell script handles this option, but it
	    # still appears in the options in the Tcl code.
	    verbose "Tcl debugger is ON"
	    continue
	}

	"--m*" {			# (--mail) mail the output
	    set mailing_list $optarg
	    set mail_logs 1
	    verbose "Mail results to $mailing_list"
	    continue
	}

	"--r*" {			# (--reboot) reboot the target
	    set reboot 1
	    verbose "Will reboot the target (if supported)"
	    continue
	}

	"--ob*" {			# (--objdir) where the test case object code lives
	    # Already parsed, but parse again to make sure command line
	    # options override any config file.
	    set objdir $optarg
	    verbose "Using test binaries in $objdir"
	    continue
	}

	"--ou*" {			# (--outdir) where to put the output files
	    set outdir $optarg
	    verbose "Test output put in $outdir"
	    continue
	}

	"--log_dialog*" {
	    incr log_dialog
	    continue
	}

	"*.exp" {			#  specify test names to run
	    set all_runtests($option) ""
	    verbose "Running only tests $option"
	    continue
	}

	"*.exp=*" {			#  specify test names to run
	    set tmp [split $option "="]
	    set all_runtests([lindex $tmp 0]) [lindex $tmp 1]
	    verbose "Running only tests $option"
	    unset tmp
	    continue
	}

	"--ig*" {			#  (--ignore) specify test names to exclude
	    set ignoretests $optarg
	    verbose "Ignoring test $ignoretests"
	    continue
	}

	"--sr*" {			# (--srcdir) where the testsuite source code lives
	    # Already parsed, but parse again to make sure command line
	    # options override any config file.

	    set srcdir $optarg
	    continue
	}

	"--str*" {			# (--strace) expect trace level
	    set tracelevel $optarg
	    strace $tracelevel
	    verbose "Source Trace level is now $tracelevel"
	    continue
	}

	"--sta*" {			# (--status) exit status flag
	    # preserved for compatability, do nothing
	    continue
	}

	"--tool_opt*" {
	    continue
	}

	"--tool_exec*" {
	    set TOOL_EXECUTABLE $optarg
	    continue
	}

	"--to*" {			# (--tool) specify tool name
	    set tool $optarg
	    verbose "Testing $tool"
	    continue
	}

	"--x*" {
	    set xml 1
	    verbose "XML logging turned on"
	    continue
	}

	"--he*" {			# (--help) help text
	    usage
	    exit 0
	}

	"[A-Z0-9_-.]*=*" { # skip makefile style args like CC=gcc, etc... (processed in first pass)
	    continue
	}

	default {
	    if {[info exists tool]} {
		if { [info procs ${tool}_option_proc] ne "" } {
		    if {[${tool}_option_proc $option]} {
			continue
		    }
		}
	    }
	    send_error "\nIllegal Argument \"$option\"\n"
	    send_error "try \"runtest --help\" for option list\n"
	    exit 1
	}
    }
}

#
# check for a few crucial variables
#
if {![info exists tool]} {
    send_error "WARNING: No tool specified\n"
    set tool ""
}

#
# initialize a few Tcl variables to something other than their default
#
if { $verbose > 2 || $log_dialog } {
    log_user 1
} else {
    log_user 0
}

set timeout 10



#
# open log files
#
open_logs

# print the config info
clone_output "Test run by $logname on [timestamp -format %c]"
if {[is3way]} {
    clone_output "Target is $target_triplet"
    clone_output "Host   is $host_triplet"
    clone_output "Build  is $build_triplet"
} else {
    if {[isnative]} {
	clone_output "Native configuration is $target_triplet"
    } else {
	clone_output "Target is $target_triplet"
	clone_output "Host   is $host_triplet"
    }
}

clone_output "\n\t\t=== $tool tests ===\n"

#
# Look for the generic board configuration file. It searches in several
# places: $libdir/config, $libdir/../config, and $boards_dir.
#

proc load_generic_config { name } {
    global libdir
    global board
    global board_info
    global boards_dir
    global board_type

    if {[info exists board]} {
	if {![info exists board_info($board,generic_name)]} {
	    set board_info($board,generic_name) $name
	}
    }

    if {[info exists board_type]} {
	set type "for $board_type"
    } else {
	set type ""
    }

    set dirlist [concat $libdir/config [file dirname $libdir]/config $boards_dir]
    set result [search_and_load_file "generic interface file $type" $name.exp $dirlist]

    return $result
}

#
# Load the tool-specific target description.
#
proc load_config { args } {
    global testsuitedir

    set found 0

    return [search_and_load_file "tool-and-target-specific interface file" $args [list $testsuitedir/config $testsuitedir/../config $testsuitedir/../../config $testsuitedir/../../../config]]
}

#
# Find the files that set up the configuration for the target. There
# are assumed to be two of them; one defines a basic set of
# functionality for the target that can be used by all tool
# testsuites, and the other defines any necessary tool-specific
# functionality. These files are loaded via load_config.
#
# These used to all be named $target_abbrev-$tool.exp, but as the
# $tool variable goes away, it's now just $target_abbrev.exp.  First
# we look for a file named with both the abbrev and the tool names.
# Then we look for one named with just the abbrev name. Finally, we
# look for a file called default, which is the default actions, as
# some tools could be purely host based. Unknown is mostly for error
# trapping.
#

proc load_tool_target_config { name } {
    global target_os libdir testsuitedir

    set found [load_config $name.exp $target_os.exp "default.exp" "unknown.exp"]

    if { $found == 0 } {
	send_error "WARNING: Couldn't find tool config file for $name, using default.\n"
	# If we can't load the tool init file, this must be a simple natively hosted
	# test suite, so we use the default procs for Unix.
	if { [search_and_load_file "library file" default.exp [list $libdir $libdir/config [file dirname [file dirname $testsuitedir]]/dejagnu/config $testsuitedir/config . [file dirname [file dirname [file dirname $testsuitedir]]]/dejagnu/config]] == 0 } {
	    send_error "ERROR: Couldn't find default tool init file.\n"
	    exit 1
	}
    }
}

#
# Find the file that describes the machine specified by board_name.
#

proc load_board_description { board_name args } {
    global libdir
    global board
    global board_info
    global boards_dir
    global board_type

    set dejagnu ""

    if { [llength $args] > 0 } {
	set whole_name [lindex $args 0]
    } else {
	set whole_name $board_name
    }

    set board_info($whole_name,name) $whole_name
    if {![info exists board]} {
	set board $whole_name
	set board_set 1
    } else {
	set board_set 0
    }

    set dirlist {}
    if { [llength $args] > 1 } {
	set suffix [lindex $args 1]
	if { $suffix ne "" } {
	    foreach x $boards_dir {
		lappend dirlist $x/$suffix
	    }
	    lappend dirlist $libdir/baseboards/$suffix
	}
    }
    set dirlist [concat $dirlist $boards_dir]
    lappend dirlist $libdir/baseboards
    verbose "dirlist is $dirlist"
    if {[info exists board_type]} {
	set type "for $board_type"
    } else {
	set type ""
    }
    if {![info exists board_info($whole_name,isremote)]} {
	set board_info($whole_name,isremote) 1
	if {[info exists board_type]} {
	    if { $board_type eq "build" } {
		set board_info($whole_name,isremote) 0
	    }
	}
	if { $board_name eq [get_local_hostname] } {
	    set board_info($whole_name,isremote) 0
	}
    }
    search_and_load_file "standard board description file $type" standard.exp $dirlist
    set found [search_and_load_file "board description file $type" $board_name.exp $dirlist]
    if { $board_set != 0 } {
	unset board
    }

    return $found
}

#
# Find the base-level file that describes the machine specified by args. We
# only look in one directory, $libdir/baseboards.
#

proc load_base_board_description { board_name } {
    global libdir
    global board
    global board_info
    global board_type

    set board_set 0
    set board_info($board_name,name) $board_name
    if {![info exists board]} {
	set board $board_name
	set board_set 1
    }
    if {[info exists board_type]} {
	set type "for $board_type"
    } else {
	set type ""
    }
    if {![info exists board_info($board_name,isremote)]} {
	set board_info($board_name,isremote) 1
	if {[info exists board_type]} {
	    if { $board_type eq "build" } {
		set board_info($board_name,isremote) 0
	    }
	}
    }

    if { $board_name eq [get_local_hostname] } {
	set board_info($board_name,isremote) 0
    }
    set found [search_and_load_file "board description file $type" $board_name.exp [list $libdir/baseboards]]
    if { $board_set != 0 } {
	unset board
    }

    return $found
}

#
# Source the testcase in TEST_FILE_NAME.
#

proc runtest { test_file_name } {
    global prms_id
    global bug_id
    global test_result
    global errcnt
    global errorCode
    global errorInfo
    global tool
    global testdir

    clone_output "Running $test_file_name ..."
    set prms_id	0
    set bug_id	0
    set test_result ""

    # set testdir so testsuite file -test has a starting point
    set testdir [file dirname $test_file_name]

    if {[file exists $test_file_name]} {
	set timestart [timestamp]

	if {[info exists tool]} {
	    if { [info procs ${tool}_init] ne "" } {
		${tool}_init $test_file_name
	    }
	}

	if { [catch "uplevel #0 source $test_file_name" msg] == 1 } {
	    # If we have a Tcl error, propagate the exit status so
	    # that 'make' (if it invokes runtest) notices the error.
	    global exit_status exit_error
	    # exit error is set by the --status command line option
	    if { $exit_status == 0 } {
		set exit_status 2
	    }
	    set new_error [list $test_file_name $msg]
	    # We can't call `perror' here, it resets `errorInfo'
	    # before we want to look at it.  Also remember that perror
	    # increments `errcnt'.  If we do call perror we'd have to
	    # reset errcnt afterwards.
	    clone_output "ERROR: tcl error sourcing $test_file_name."
	    if {[info exists errorCode]} {
		clone_output "ERROR: tcl error code $errorCode"
		lappend new_error $errorCode
	    } else {
		lappend new_error [list]
	    }
	    if {[info exists errorInfo]} {
		clone_output "ERROR: $errorInfo"
		lappend new_error $errorInfo
		unset errorInfo
	    } else {
		lappend new_error [list]
	    }
	    lappend ::dejagnu::error::list $new_error
	    unresolved "testcase '$test_file_name' aborted due to Tcl error"
	}

	if {[info exists tool]} {
	    if { [info procs ${tool}_finish] ne "" } {
		${tool}_finish
	    }
	}
	set timeend [timestamp]
	set timediff [expr {$timeend - $timestart}]
	verbose -log "testcase $test_file_name completed in $timediff seconds" 4
    } else {
	# This should never happen, but maybe if the file got removed
	# between the `find' above and here.
	perror "$test_file_name does not exist." 0
    }
}

# Trap some signals so we know what's happening.  These replace the previous
# ones because we've now loaded the library stuff.
#
if {![exp_debug]} {
    foreach sig {{SIGINT {interrupted by user} 130} \
		     {SIGQUIT {interrupted by user} 131} \
		     {SIGTERM {terminated} 143}} {
	set signal [lindex $sig 0]
	set str [lindex $sig 1]
	set code [lindex $sig 2]
	trap "send_error \"got a \[trap -name\] signal, $str \\n\"; set exit_status $code; log_and_exit;" $signal
	verbose "setting trap for $signal to $str" 1
    }
    unset signal str sig
}

#
# Given a list of targets, process any iterative lists.
#
proc process_target_variants { target_list } {
    set result {}
    foreach x $target_list {
	if {[regexp "\\(" $x]} {
	    regsub {^.*\(([^()]*)\)$} $x {\1} variant_list
	    regsub {\([^(]*$} $x "" x
	    set list [process_target_variants $x]
	    set result {}
	    foreach x $list {
		set result [concat $result [iterate_target_variants $x [split $variant_list ","]]]
	    }
	} elseif {[regexp "\{" $x]} {
	    regsub "^.*\{(\[^\{\}\]*)\}$" $x {\1} variant_list
	    regsub "\{\[^\{\]*$" $x "" x
	    set list [process_target_variants $x]
	    foreach x $list {
		foreach i [split $variant_list ","] {
		    set name $x
		    if { $i ne "" } {
			append name "/" $i
		    }
		    lappend result $name
		}
	    }
	} else {
	    lappend result $x
	}
    }
    return $result
}

proc iterate_target_variants { target variants } {
    return [iterate_target_variants_two $target $target $variants]
}

#
# Given a list of variants, produce the list of all possible combinations.
#
proc iterate_target_variants_two { orig_target target variants } {

    if { [llength $variants] == 0 } {
	return [list $target]
    } else {
	if { [llength $variants] > 1 } {
	    set result [iterate_target_variants_two $orig_target $target [lrange $variants 1 end]]
	} else {
	    if { $target ne $orig_target } {
		set result [list $target]
	    } else {
		set result {}
	    }
	}
	if { [lindex $variants 0] ne "" } {
	    append target "/" [lindex $variants 0]
	    return [concat $result [iterate_target_variants_two $orig_target $target [lrange $variants 1 end]]]
	} else {
	    return [concat $result $target]
	}
    }
}

setup_build_hook [get_local_hostname]

if {[info exists host_board]} {
    setup_host_hook $host_board
} else {
    set hb [get_local_hostname]
    if { $hb ne "" } {
	setup_host_hook $hb
    }
}

#
# main test execution loop
#

if {[info exists errorInfo]} {
    unset errorInfo
}


# make sure we have only single path delimiters
regsub -all {([^/])//*} $srcdir {\1/} srcdir
regsub -all {([^/])//*} $objdir {\1/} objdir
regsub -all {([^/])//*} $testsuitedir {\1/} testsuitedir
regsub -all {([^/])//*} $testbuilddir {\1/} testbuilddir

if {![info exists target_list]} {
    # Make sure there is at least one target machine. It's probably a Unix box,
    # but that's just a guess.
    set target_list { "unix" }
} else {
    verbose "target list is $target_list"
}

#
# Iterate through the list of targets.
#
global current_target

set target_list [process_target_variants $target_list]

set target_count [llength $target_list]

clone_output "Schedule of variations:"
foreach current_target $target_list {
    clone_output "    $current_target"
}
clone_output ""


foreach current_target $target_list {
    verbose "target is $current_target"
    set current_target_name $current_target
    set tlist [split $current_target /]
    set current_target [lindex $tlist 0]
    set board_variant_list [lrange $tlist 1 end]

    # Set the counts for this target to 0.
    reset_vars
    clone_output "Running target $current_target_name"

    setup_target_hook $current_target_name $current_target

    # If multiple passes requested, set them up.  Otherwise prepare just one.
    # The format of `MULTIPASS' is a list of elements containing
    # "{ name var1=value1 ... }" where `name' is a generic name for the pass and
    # currently has no other meaning.

    global env

    if { [info exists MULTIPASS] } {
	set multipass $MULTIPASS
    }
    if { $multipass eq "" } {
	set multipass { "" }
    }

    # If PASS is specified, we want to run only the tests specified.
    # Its value should be a number or a list of numbers that specify
    # the passes that we want to run.
    if {[info exists PASS]} {
	set pass $PASS
    } else {
	set pass ""
    }

    if {$pass ne ""} {
	set passes [list]
	foreach p $pass {
	    foreach multipass_elem $multipass {
		set multipass_name [lindex $multipass_elem 0]
		if {$p == $multipass_name} {
		    lappend passes $multipass_elem
		    break
		}
	    }
	}
	set multipass $passes
    }

    foreach pass $multipass {

	# multipass_name is set for `record_test' to use (see framework.exp).
	if { [lindex $pass 0] ne "" } {
	    set multipass_name [lindex $pass 0]
	    clone_output "Running pass `$multipass_name' ..."
	} else {
	    set multipass_name ""
	}
	set restore ""
	foreach varval [lrange $pass 1 end] {
	    set tmp [string first "=" $varval]
	    set var [string range $varval 0 [expr {$tmp - 1}]]
	    # Save previous value.
	    if {[info exists $var]} {
		lappend restore "$var [list [eval concat \$$var]]"
	    } else {
		lappend restore $var
	    }
	    # Handle "CFLAGS=$CFLAGS foo".
	    eval set $var \[string range \"$varval\" [expr {$tmp + 1}] end\]
	    verbose "$var is now [eval concat \$$var]"
	    unset tmp var
	}

	# look for the top level testsuites. if $tool doesn't
	# exist and there are no subdirectories in $testsuitedir, then
	# we print a warning and default to srcdir.
	set test_top_dirs [lsort [getdirs -all $testsuitedir $tool*]]
	if { $test_top_dirs eq "" } {
	    send_error "WARNING: could not find testsuite; trying $srcdir.\n"
	    set test_top_dirs [list $srcdir]
	} else {
	    # JYG:
	    # DejaGNU's notion of test tree and test files is very
	    # general:
	    # given $testsuitedir and $tool, any subdirectory (at any
	    # level deep) with the "$tool" prefix starts a test tree
	    # given a test tree, any *.exp file underneath (at any
	    # level deep) is a test file.
	    #
	    # For test tree layouts with $tool prefix on
	    # both a parent and a child directory, we need to eliminate
	    # the child directory entry from test_top_dirs list.
	    # e.g. gdb.hp/gdb.base-hp/ would result in two entries
	    # in the list: gdb.hp, gdb.hp/gdb.base-hp.
	    # If the latter not eliminated, test files under
	    # gdb.hp/gdb.base-hp would be run twice (since test files
	    # are gathered from all sub-directories underneath a
	    # directory).
	    #
	    # Since $tool may be g++, etc. which could confuse
	    # regexp, we cannot do the simpler test:
	    #     ...
	    #     if [regexp "$testsuitedir/.*$tool.*/.*$tool.*" $dir]
	    #     ...
	    # instead, we rely on the fact that test_top_dirs is
	    # a sorted list of entries, and any entry that contains
	    # the previous valid test top dir entry in its own pathname
	    # must be excluded.

	    set temp_top_dirs [list]
	    set prev_dir ""
	    foreach dir $test_top_dirs {
		if { $prev_dir eq ""
		     || [string first $prev_dir/ $dir] == -1 } {
		    # the first top dir entry, or an entry that
		    # does not share the previous entry's entire
		    # pathname, record it as a valid top dir entry.
		    #
		    lappend temp_top_dirs $dir
		    set prev_dir $dir
		}
	    }
	    set test_top_dirs $temp_top_dirs
	}
	verbose "Top level testsuite dirs are $test_top_dirs" 2
	set testlist ""
	if {[array exists all_runtests]} {
	    foreach x [array names all_runtests] {
		verbose "trying to glob $testsuitedir/$x" 2
		set s [glob -nocomplain $testsuitedir/$x]
		if { $s ne "" } {
		    set testlist [concat $testlist $s]
		}
	    }
	}
	#
	# If we have a list of tests, run all of them.
	#
	if { $testlist ne "" } {
	    foreach test_name $testlist {
		if { $ignoretests ne "" } {
		    if { 0 <= [lsearch $ignoretests [file tail $test_name]]} {
			continue
		    }
		}

		# set subdir to the tail of the dirname after $srcdir,
		# for the driver files that want it.  XXX this is silly.
		# drivers should get a single var, not $srcdir/$subdir
		set subdir [relative_filename $srcdir \
				[file dirname $test_name]]

		# XXX not the right thing to do.
		set runtests [list [file tail $test_name] ""]

		runtest $test_name
	    }
	} else {
	    #
	    # Go digging for tests.
	    #
	    foreach dir $test_top_dirs {
		if { $dir ne $testsuitedir } {
		    # Ignore this directory if is a directory to be
		    # ignored.
		    if {[info exists ignoredirs] && $ignoredirs ne ""} {
			set found 0
			foreach directory $ignoredirs {
			    if {[string match *$directory* $dir]} {
				set found 1
				break
			    }
			}
			if { $found } {
			    continue
			}
		    }

		    # Run the test if dir_to_run was specified as a
		    # value (for example in MULTIPASS) and the test
		    # directory matches that directory.
		    if {[info exists dir_to_run] && $dir_to_run ne ""} {
			# JYG: dir_to_run might be a space delimited list
			# of directories.  Look for match on each item.
			set found 0
			foreach directory $dir_to_run {
			    if {[string match *$directory* $dir]} {
				set found 1
				break
			    }
			}
			if {!$found} {
			    continue
			}
		    }

		    # Run the test if cmdline_dir_to_run was specified
		    # by the user using --directory and the test
		    # directory matches that directory
		    if {[info exists cmdline_dir_to_run] \
			    && $cmdline_dir_to_run ne ""} {
			# JYG: cmdline_dir_to_run might be a space delimited
			# list of directories.  Look for match on each item.
			set found 0
			foreach directory $cmdline_dir_to_run {
			    # Look for a directory that ends with the
			    # provided --directory name.
			    if {[string match $directory $dir]
				|| [string match "*/$directory" $dir]} {
				set found 1
				break
			    }
			}
			if {!$found} {
			    continue
			}
		    }

		    foreach test_name [lsort [find $dir *.exp]] {
			if { $test_name eq "" } {
			    continue
			}
			# Ignore this one if asked to.
			if { $ignoretests ne "" } {
			    if { 0 <= [lsearch $ignoretests [file tail $test_name]]} {
				continue
			    }
			}

			# Get the path after the $srcdir so we know
			# the subdir we're in.
			set subdir [relative_filename $srcdir \
					[file dirname $test_name]]
			# Check to see if the range of tests is limited,
			# set `runtests' to a list of two elements: the script name
			# and any arguments ("" if none).
			if {[array exists all_runtests]} {
			    verbose "searching for $test_name in [array names all_runtests]" 2
			    if { 0 > [lsearch [array names all_runtests] [file tail $test_name]]} {
				if { 0 > [lsearch [array names all_runtests] $test_name] } {
				    continue
				}
			    }
			    set runtests [list [file tail $test_name] $all_runtests([file tail $test_name])]
			} else {
			    set runtests [list [file tail $test_name] ""]
			}
			runtest $test_name
		    }
		}
	    }
	}

	# Restore the variables set by this pass.
	foreach varval $restore {
	    if { [llength $varval] > 1 } {
		verbose "Restoring [lindex $varval 0] to [lindex $varval 1]" 4
		set [lindex $varval 0] [lindex $varval 1]
	    } else {
		verbose "Restoring [lindex $varval 0] to `unset'" 4
		unset -- [lindex $varval 0]
	    }
	}
    }
    cleanup_target_hook $current_target
    if { $target_count > 1 } {
	log_summary
    }
}

log_and_exit