aboutsummaryrefslogtreecommitdiff
path: root/lib/target.exp
blob: 8d28770cd2e8ab1067277214c5c02df9a4f0aa49 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
# Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001
# 2002, 2003, 2005, 2006, 2007, 2008, 2009, 2010 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> and
# extensively modified by Bob Manson <manson@cygnus.com>.

# A hairy pattern to recognize text.
set text "\[- A-Za-z0-9\.\;\"\_\:\'\`\(\)\!\#\=\+\?\&\*]"

# This is a collection of support procs for the target data
# structures. We use a named array, since Tcl has no real data
# structures. Here's the special index words for the array:
#       Required fields are:
#	    name    - the name of the target. (mostly for error messages) This
#		      should also be the string used for this target's array.
#                     It should also be the same as the linker script so we
#		      can find them dynamically.
#       Optional fields are:
#	    ldflags - the flags required to produce a fully linked executable.
#	    config  - the target canonical for this target. This is a regexp
#		      as passed to istarget or isnative.
#	    cflags  - the flags required to produce an object file from a
#		      source file.
#	    connect - the connectmode for this target. This is for both IP and
#		      serial connections.
#	    hostname  - the hostname of the target. This is for TCP/IP based
#		      connections, and is also used for versions of tip that
#		      use /etc/remote.
#	    serial  - the serial port. This is typically /dev/tty? or com?:.
#	    baud    - the baud rate for a serial port connection.
#	    netport - the IP port.
#	    x10     - parameters for the x10 controller (used to reboot)
#	    fileid  - the fileid or spawn id of of the connection.
#	    prompt  - a regexp for matching the prompt.
#	    ioport  - the port for I/O on dual port systems.
#
# there are three main arrays, indexed in with "target", "build", and "host".
# all other targets are indexed with a name usually based on the linker script
# like "idp", or "ex93x.ld".
#

# Set the target connection.
#
proc push_target { name } {
    global target_abbrev

    pop_config  target
    push_config target $name
}

# Set the host connnection.
#
proc push_host { name } {
    pop_config host
    push_config host $name
}

# Set the build connnection.
#
proc push_build { name } {
    pop_config build
    push_config build $name
}

# Set the config for the current host or target connection.
#
proc push_config { type name } {
    global target_info

    verbose "pushing config for $type, name is $name"
    if {[info exists target_info($type,name)]} {
	if { $target_info($type,name) == $name } {
	    error "pushing config for $type, '$name' twice"
	}
    }
    set target_info($type,name) $name
}

# Set the current connection for target or host.
#
proc pop_config { type  } {
    global target_info

    if {[info exists target_info(${type},name)]} {
	unset target_info(${type},name)
    }
}

# Unset the target connection.
#
proc pop_target { } {
    pop_config target
}

# Unset the host connection.
#
proc pop_host { } {
    pop_config host
}

# Remove extraneous warnings from TEXT.
#
# An example is:
# ld.so: warning: /usr/lib/libc.so.1.8.1 has older revision than expected 9
#
proc prune_warnings { text } {
    global host_triplet

    # remove the \r part of "\r\n" so we don't break all the patterns
    # we want to match.
    regsub -all -- "\r" $text "" text

    # This is from sun4's.  Do it for all machines for now.
    # The "\\1" is to try to preserve a "\n" but only if necessary.
    if {[ishost "sparc-*-sunos*"]} {
	regsub -all "(^|\n)(ld.so: warning:\[^\n\]*\n?)+" $text "\\1" text
    }

    # See Brendan for the raison d'etre of this one.
    if {[ishost "alpha*-*-*"]} {
        regsub -all "(^|\n)(/usr/(ucb|bin)/ld.*without exceptions was\[^\n\]+\n?)" $text "\\1" text
    }
    if {[ishost "hppa*-*-hpux*"]} {
       # Ignore the compiler's warnings about PA incompatibility.
       regsub -all "(^|\n)\[^\n\]*PA 2.0 object file \[^\n\]* was detected. The linked output may not run on a PA 1.x system." $text "" text

       regsub -all "(^|\n)\[^\n\]*PA 2.0 object file \[^\n\]* was detected. The linked output may not run on a PA 1.x system." $text "" text

       # And the linker's +vcompatwarnings verbage.
       regsub -all "(^|\n)\[^\n\]*Linker features were used that may not be supported\[^\n\]*.\[^\n\]*." $text "" text

       # Ignore these warnings, which the HP aCC compiler seems to
       # generate on HP-UX 10.30 and 11.0.  (Something is probably
       # wrong with some system headers, but still...)
       #
       # This particular warning always is given with a line of warning
       # text, followed by a source line, followed by a line with "^^^"
       # underlining an offending symbol name.  Here we slurp up the
       # warning text and the next two lines, assuming that they are
       # the source line and underline chars.
       #
       regsub -all "Warning .*The linkage directive is ignored for an object or function declared static..\[^\n\]*.\[^\n\]*." $text "" text

       # Ignore these warnings, which I often see from the ANSI C
       # compiler installed on HP-UX 11.0 machines.  (Something is
       # probably wrong with an installation, or perhaps NLS isn't
       # quite healthy yet on 11.0.  In either case, it's easier to
       # "fix" this nit here, than it is to track down & fix the
       # root cause.)
       #
       # This particular warning always is given with a line of warning
       # text, followed by line that says "Using internal messages".
       #
       regsub -all "Warning: Unable to open pxdb message catalog.*" $text "" text
       regsub -all ".* Using internal messages.*" $text "" text

       # Another form of the "unable to find message catalog" warning.
       #
       regsub -all "cpp: warning .*Possibly incorrect message catalog." $text "" text

       # Another odd warning on 11.0.
       #
       regsub -all "aCC .assigner.: Warning .*Could not find library for -l.*" $text "" text

       # Oh heck, just keep adding 'em here...
       #
       regsub -all "aCC .assigner.: Warning .*Could not satisfy instantiation request for \[^\n\]* contained in\[^\n\]*\n\t/lib/pa20_64/lib\[a-zA-Z0-9\]*.sl" $text "" text

      # Remove the lines that are output by the HP F77 compiler to
      # indicate the functions that are being compiled.
      upvar compiler_type compiler_type
      if { [info exists compiler_type] && $compiler_type == "f77" } {
	  regsub -all "\[ \ta-zA-Z_0-9\./\]*:\[\r\n\]+" $text "" text
      }

      # Ignore the warnings about unknown options
      regsub -all ".*warning \[0-9\]+: Unknown option.*ignored.*" $text "" text

      }

    # Ignore these.
    regsub -all "(^|\n)\[^\n\]*linker input file unused since linking not done" $text "" text
    regsub -all "(^|\n)\[^\n\]*file path prefix \[^\n\]* never used" $text "" text

    # This is from sun4's.  Do it for all machines for now.
    # The "\\1" is to try to preserve a "\n" but only if necessary.
    regsub -all "(^|\n)(ld.so: warning:\[^\n\]*\n?)+" $text "\\1" text

    # This happens when compiling on Alpha OSF/1 with cc -g -O.
    regsub -all "(^|\n)(\n*uopt: Warning: file not optimized; use -g3 if both optimization and debug wanted\n?)+" $text "\\1" text

    # This happens when compiling on Alpha OSF using gas.
    regsub -all "(^|\n)(/usr/.*/ld:\nWarning: Linking some objects which contain exception information sections\n\tand some which do not. This may cause fatal runtime exception handling\n\tproblems\[^\n\]*\n?)+" $text "\\1" text

    # This happens on SunOS with cc -g -O.
    regsub -all "(^|\n)(cc: Warning: -O conflicts with -g. -O turned off.\n?)+" $text "\\1" text

    # This happens when assembling code with the native HP assembler
    regsub -all "(^|\n)(as:\[^\n\]*err#13.\n  .warning.\[^\n\]*\n?)+" $text "\\1" text

    # When using the HP assembler, -g isn't supported.
    regsub -all "(^|\n)(cc1: warning: -g is only supported when using GAS on this processor\[^\n\]*\ncc1: warning:\[^\n\]*\n?)+" $text "\\1" text
    regsub -all "(^|\n)(cc1plus: warning: -g is only supported when using GAS on this processor\[^\n\]*\ncc1plus: warning:\[^\n\]*\n?)+" $text "\\1" text

    # This happens when testing across NFS.
    regsub -all "(^|\n)((NFS|nfs) server \[^\n\]* not responding\[^\n\]*\n?)+" $text "\\1" text
    regsub -all "(^|\n)((NFS|nfs) server \[^\n\]* (ok|is alive again)\[^\n\]*\n?)+" $text "\\1" text

    # This happens when testing across NFS on osf4.
    regsub -all "(^|\n)(NFS3 server \[^\n\]* not responding still trying\[^\n\]*\n?)+" $text "\\1" text
    regsub -all "(^|\n)(NFS3 server \[^\n\]* ok\[^\n\]*\n?)+" $text "\\1" text

    # When using the IRIX 6 o32 assembler, -g isn't supported
    regsub -all "(^|\n)(cc1: warning: `-g' not supported by this configuration of GCC\[^\n\]*\n?)+" $text "\\1" text
    regsub -all "(^|\n)(cc1plus: warning: `-g' not supported by this configuration of GCC\[^\n\]*\n?)+" $text "\\1" text

    regsub -all "(^|\n)(cc1: warning: -mabi=32 does not support -g\[^\n\]*\n?)+" $text "\\1" text
    regsub -all "(^|\n)(cc1plus: warning: -mabi=32 does not support -g\[^\n\]*\n?)+" $text "\\1" text

    # This happens with the o32 assembler on IRIX 6.
    regsub -all "(^|\n)(as: Warning: -O3 is not supported for assembly compiles for ucode compilers; changing to -O2.\n?)+" $text "\\1" text

    # This happens when using g++ on a DWARF system.
    regsub -all "(^|\n)(cc1plus: warning: -g option not supported for C\\+\\+ on systems using the DWARF debugging format\n?)+" $text "\\1" text

    # This is from sun4's.  Do it for all machines for now.
    # The "\\1" is to try to preserve a "\n" but only if necessary.
    regsub -all "(^|\n)(ld.so: warning:\[^\n\]*\n?)+" $text "\\1" text

    # See Brendan for the raison d'etre of this one.
    if {[string match "alpha*-*-*" $host_triplet]} {
        regsub -all "(^|\n)(/usr/(ucb|bin)/ld.*without exceptions was\[^\n\]+\n?)" $text "\\1" text
    }

    # Don't pay attention to the AIX4 linker warnings.
    regsub -all "(^|\n)(ld:.*WARNING: Duplicate.*ld:.*Use the -bload\[^\n\]*\n?)" $text "\\1" text

    # Or the IRIX 6 ones.
    regsub -all "(^|\n)(ld(|32|64): WARNING \[^\n\]*\n?)+" $text "\\1" text
    regsub -all "(^|\n)(ld(|32|64): Giving up.*Use -wall\[^\n\]*\n?)+" $text "\\1" text

    # Or the NetBSD ones.
     regsub -all "(^|\n)(\[^\n\]*: In function\[^\n\]*\n\[^\n\]\[^\n\]*warning: this program uses \[^\n\]*)" $text "\\1" text
     regsub -all "(^|\n)(\[^\n\]*: In function\[^\n\]*\n\[^\n\]\[^\n\]*warning: reference to compatibility \[^\n\]*)" $text "\\1" text
     regsub -all "(^|\n)(\[^\n\]*:\[0-9\]+: warning: \[^\n\]* possibly used unsafely, use \[^\n\]*\n?)" $text "\\1" text
    regsub -all "(^|\n)(\[^\n\]*: warning: reference to compatibility glob\[^\n\]*\n?)" $text "\\1" text

    # Or the OpenBSD ones.
    regsub -all "(^|\n)(\[^\n\]*: In function\[^\n\]*\n\[^\n\]\[^\n\]*warning: \[^\n\]* is (often|almost always) misused, please use \[^\n\]*\n?)" $text "\\1" text
    regsub -all "(^|\n)(\[^\n\]*: warning: \[^\n\]* is (often|almost always) misused, please use \[^\n\]*\n?)" $text "\\1" text

    # GNU ld warns about functions marked as dangerous in GNU libc.
    regsub -all "(^|\n)\[^\n\]*: In function\[^\n\]*\n\[^\n\]\[^\n\]*is dangerous\[^\n\]*" $text "" text
     regsub -all "(^|\n)\[^\n\]*: In function\[^\n\]*\n\[^\n\]\[^\n\]*the use of \[^\n\]* is dangerous, better use \[^\n\]*" $text "" text
    regsub -all "(^|\n)\[^\n\]*is dangerous\[^\n\]*" $text "" text

     # Libgloss libnosys defines functions that warn when linked in
    regsub -all "(^|\n)\[^\n\]*: In function\[^\n\]*\n\[^\n\]\[^\n\]*is not implemented and will always fail\[^\n\]*" $text "" text
    regsub -all "(^|\n)\[^\n\]*is not implemented and will always fail\[^\n\]*" $text "" text

    # libstdc++-v3 tests can emit cpplib warnings due to duplicate -isystem / -I flags
    regsub -all "(^|\n)\[^\n\]*: warning: changing search order for system directory\[^\n\]*" $text "" text
    regsub -all "(^|\n)\[^\n\]*: warning:   as it has already been specified\[^\n\]*" $text "" text

    # Cygwin cc1 warns about -fpic and -fPIC
    regsub -all "(^|\n)\[^\n\]*: warning: -f(pic|PIC) ignored for target \[^\n\]*" $text "" text

    # Ignore linker warning when searching 64bit libraries in /lib.
    regsub -all "(^|\n)\[^\n\]*: skipping incompatible \[^\n\]* when searching for \[^\n\]*" $text "" text

    # It might be tempting to get carried away and delete blank lines, etc.
    # Just delete *exactly* what we're ask to, and that's it.
    return $text
}

# Invoke the compiler. This gets interesting cause the compiler may
# not be on the same machine we're running DejaGnu on.
#
proc target_compile {source destfile type options} {
    set target [target_info name]
    if { [info proc ${target}_compile] != "" } {
        return [${target}_compile $source $destfile $type $options]
    } else {
        return [default_target_compile $source $destfile $type $options]
    }
}

proc default_target_compile {source destfile type options} {
    global target_triplet
    global tool_root_dir
    global CFLAGS_FOR_TARGET
    global compiler_flags

    if { $destfile == "" && $type != "preprocess" && $type != "none" } {
	error "Must supply an output filename for the compile to default_target_compile"
    }

    set add_flags ""
    set libs ""
    set compiler_type "c"
    set compiler ""
    set ldflags ""
    set dest [target_info name]

    if {[info exists CFLAGS_FOR_TARGET]} {
	append add_flags " $CFLAGS_FOR_TARGET"
    }

    if {[info exists target_info(host,name)]} {
	set host [host_info name]
    } else {
	set host "unix"
    }

    foreach i $options {

	if { $i == "ada" } {
	    set compiler_type "ada"
	    if {[board_info $dest exists adaflags]} {
		append add_flags " [target_info adaflags]"
	    }
	    if {[board_info $dest exists gnatmake]} {
		set compiler [target_info gnatmake];
	    } else {
		set compiler [find_gnatmake];
	    }
	}
	
	if { $i == "c++" } {
	    set compiler_type "c++"
	    if {[board_info $dest exists cxxflags]} {
		append add_flags " [target_info cxxflags]"
	    }
	    append add_flags " [g++_include_flags]"
	    if {[board_info $dest exists c++compiler]} {
		set compiler [target_info c++compiler]
	    } else {
		set compiler [find_g++]
	    }
	}

	if { $i == "f77" } {
	    set compiler_type "f77"
	    if {[board_info $dest exists f77flags]} {
		append add_flags " [target_info f77flags]"
	    }
	    if {[board_info $dest exists f77compiler]} {
		set compiler [target_info f77compiler]
	    } else {
		set compiler [find_g77]
	    }
	}

	if {[regexp "^dest=" $i]} {
	    regsub "^dest=" $i "" tmp
	    if {[board_info $tmp exists name]} {
		set dest [board_info $tmp name]
	    } else {
		set dest $tmp
	    }
	}
	if {[regexp "^compiler=" $i]} {
	    regsub "^compiler=" $i "" tmp
	    set compiler $tmp
	}
	if {[regexp "^additional_flags=" $i]} {
	    regsub "^additional_flags=" $i "" tmp
	    append add_flags " $tmp"
	}
	if {[regexp "^ldflags=" $i]} {
	    regsub "^ldflags=" $i "" tmp
	    append ldflags " $tmp"
	}
	if {[regexp "^libs=" $i]} {
	    regsub "^libs=" $i "" tmp
	    append libs " $tmp"
	}
	if {[regexp "^incdir=" $i]} {
	    regsub "^incdir=" $i "-I" tmp
	    append add_flags " $tmp"
	}
	if {[regexp "^libdir=" $i]} {
	    regsub "^libdir=" $i "-L" tmp
	    append add_flags " $tmp"
	}
	if {[regexp "^ldscript=" $i]} {
	    regsub "^ldscript=" $i "" ldscript
	}
 	if {[regexp "^redirect=" $i]} {
 	    regsub "^redirect=" $i "" redirect
 	}
 	if {[regexp "^optimize=" $i]} {
 	    regsub "^optimize=" $i "" optimize
 	}
 	if {[regexp "^timeout=" $i]} {
 	    regsub "^timeout=" $i "" timeout
 	}
    }

    if {[board_info $host exists cflags_for_target]} {
	append add_flags " [board_info $host cflags_for_target]"
    }

    global CC_FOR_TARGET
    global CXX_FOR_TARGET
    global F77_FOR_TARGET
    global GNATMAKE_FOR_TARGET

    if {[info exists GNATMAKE_FOR_TARGET]} {
	if { $compiler_type == "ada" } {
	    set compiler $GNATMAKE_FOR_TARGET
	}
    }

    if {[info exists CC_FOR_TARGET]} {
	if { $compiler == "" } {
	    set compiler $CC_FOR_TARGET
	}
    }

    if {[info exists CXX_FOR_TARGET]} {
	if { $compiler_type == "c++" } {
	    set compiler $CXX_FOR_TARGET
	}
    }

    if {[info exists F77_FOR_TARGET]} {
	if { $compiler_type == "f77" } {
	    set compiler $F77_FOR_TARGET
	}
    }

    if { $compiler == "" } {
	set compiler [board_info $dest compiler]
	if { $compiler == "" } {
	    return "default_target_compile: No compiler to compile with"
	}
    }

    if {![is_remote host]} {
	if { [which $compiler] == 0 } {
	    return "default_target_compile: Can't find $compiler."
	}
    }

    if {$type == "object"} {
	append add_flags " -c"
    }

    if { $type == "preprocess" } {
	append add_flags " -E"
    }

    if { $type == "assembly" } {
	append add_flags " -S"
    }

    if {[board_info $dest exists cflags]} {
	append add_flags " [board_info $dest cflags]"
    }

    if { $type == "executable" } {
	if {[board_info $dest exists ldflags]} {
	    append add_flags " [board_info $dest ldflags]"
	}
	if { $compiler_type == "c++" } {
	    append add_flags " [g++_link_flags]"
	}
	if {[isnative]} {
	    # This is a lose.
	    catch "glob -nocomplain $tool_root_dir/libstdc++/libstdc++.so* $tool_root_dir/libstdc++/libstdc++.sl" tmp
	    if { ${tmp} != "" } {
		if {[regexp ".*solaris2.*" $target_triplet]} {
		    # Solaris 2
		    append add_flags " -R$tool_root_dir/libstdc++"
		} elseif {[regexp ".*(osf|irix5|linux).*" $target_triplet]} {
		    # OSF/1 or IRIX 5
		    append add_flags " -Wl,-rpath,$tool_root_dir/libstdc++"
		} elseif {[regexp ".*hppa.*" $target_triplet]} {
		    # HP-UX
		    append add_flags " -Wl,-a,shared_archive"
		}
	    }
	}
    }

    if {![info exists ldscript]} {
	set ldscript [board_info $dest ldscript]
    }

    foreach i $options {
	if { $i == "debug" } {
	    if {[board_info $dest exists debug_flags]} {
		append add_flags " [board_info $dest debug_flags]"
	    } else {
		append add_flags " -g"
	    }
	}
    }

    if {[info exists optimize]} {
	append add_flags " $optimize"
    }

    if { $type == "executable" } {
	append add_flags " $ldflags"
	foreach x $libs {
	    if {[file exists $x]} {
		append source " $x"
	    } else {
		append add_flags " $x"
	    }
	}

	if {[board_info $dest exists libs]} {
	    append add_flags " [board_info $dest libs]"
	}

	# This probably isn't such a good idea, but it avoids nasty
	# hackiness in the testsuites.
	# The math library must be linked in before the C library.  The C
	# library is linked in by the linker script, so this must be before
	# the linker script.
	if {[board_info $dest exists mathlib]} {
	    append add_flags " [board_info $dest mathlib]"
	} else {
	    append add_flags " -lm"
	}

	# This must be added here.
	append add_flags " $ldscript"

	if {[board_info $dest exists remote_link]} {
	    # Relink option.
	    append add_flags " -Wl,-r"
	}
	if {[board_info $dest exists output_format]} {
	    append add_flags " -Wl,-oformat,[board_info $dest output_format]"
	}
    }

    if {[board_info $dest exists multilib_flags]} {
	append add_flags " [board_info $dest multilib_flags]"
    }

    verbose "doing compile"

    set sources ""
    if {[is_remote host]} {
	foreach x $source {
	    set file [remote_download host $x]
	    if { $file == "" } {
		warning "Unable to download $x to host."
		return "Unable to download $x to host."
	    } else {
		append sources " $file"
	    }
	}
    } else {
	set sources $source
    }

    if {[is_remote host]} {
	append add_flags " -o a.out"
	remote_file host delete a.out
    } else {
	if { $destfile != "" } {
	    append add_flags " -o $destfile"
	}
    }

    # This is obscure: we put SOURCES at the end when building an
    # object, because otherwise, in some situations, libtool will
    # become confused about the name of the actual source file.
    if {$type == "object"} {
        set opts "$add_flags $sources"
    } else {
        set opts "$sources $add_flags"
    }

    if {[is_remote host]} {
	if {[host_info exists use_at]} {
	    set fid [open "atfile" "w"]
	    puts $fid "$opts"
	    close $fid
	    set opts "@[remote_download host atfile]"
	    remote_file build delete atfile
	}
    }

    verbose "Invoking the compiler as $compiler $opts" 2

    if {[info exists redirect]} {
	verbose "Redirecting output to $redirect" 2
	set status [remote_exec host "$compiler $opts" "" "" $redirect]
    } else {
	if {[info exists timeout]} {
	    verbose "Setting timeout to $timeout" 2
	    set status [remote_exec host "$compiler $opts" "" "" "" $timeout]
	} else {
	    set status [remote_exec host "$compiler $opts"]
	}
    }

    set compiler_flags $opts
    if {[is_remote host]} {
	remote_upload host a.out $destfile
	remote_file host delete a.out
    }
    set comp_output [prune_warnings [lindex $status 1]]
    regsub "^\[\r\n\]+" $comp_output "" comp_output
    if { [lindex $status 0] != 0 } {
	verbose -log "compiler exited with status [lindex $status 0]"
    }
    if { [lindex $status 1] != "" } {
	verbose -log "output is:\n[lindex $status 1]" 2
    }
    if { [lindex $status 0] != 0 && "${comp_output}" == "" } {
	set comp_output "exit status is [lindex $status 0]"
    }
    return ${comp_output}
}

proc reboot_target { } {
    set result [remote_reboot target]
    puts "REBOOT_TARGET: \"$result\""
    return ${result}
}

# Invoke this if you really want as to be called directly, rather than
# calling the compiler. FLAGS are any additional flags to pass to the
# assembler.
#
proc target_assemble { source destfile flags } {
    return [default_target_assemble $source $destfile $flags]
}

proc default_target_assemble { source destfile flags } {
    global AS_FOR_TARGET
    global ASFLAGS_FOR_TARGET

    if {[info exists AS_FOR_TARGET]} {
	set AS "$AS_FOR_TARGET"
    } else {
	if {![board_info target exists assembler]} {
	    set AS [find_gas]
	} else {
	    set AS [board_info target assembler]
	}
    }

    if {[info exists ASFLAGS_FOR_TARGET]} {
	append flags " $ASFLAGS_FOR_TARGET"
    }

    if {[is_remote host]} {
	set source [remote_download host $source]
	set dest "a.out"
    } else {
	set dest $destfile
    }
    set status [remote_exec host "$AS $source $flags -o $dest"]
    if {[is_remote host]} {
	remote_upload host $dest $destfile
    }

    set comp_output [prune_warnings [lindex $status 1]]
    if { [lindex $status 0] != 0 } {
	verbose -log "assembler exited with status [lindex $status 0]"
    }
    if { [lindex $status 1] != "" } {
	verbose -log "assembler output is:\n[lindex $status 1]" 2
    }
    return ${comp_output}
}

# Invoke this if you really want ld to be called directly, rather than
# calling the compiler. FLAGS are any additional flags to pass to the
# linker.
#
proc target_link { objects destfile flags } {
    return [default_link target "$objects" "$destfile" $flags]
}

proc default_link { board objects destfile flags } {
    global LD_FOR_TARGET
    global LDFLAGS_FOR_TARGET

    # return -L's in ldflags
    proc only--Ls { ldflags } {
	set result ""
	set ldflags [split $ldflags]
	set len [llength $ldflags]
	for { set i 0 } { $i < $len } { incr i } {
	    # ??? We ignore the situation where a -L is actually the argument
	    # to an option.
	    set arg [lindex $ldflags $i]
	    regsub "^-Wl," $arg "" arg
	    if {[regexp "^-L" $arg]} {
		# Is the directory in the next arg, or part of this one?
		if { "$arg" == "-L" } {
		    if { $i + 1 < $len } {
			append result " -L [lindex $ldflags $i+1]"
			incr i
		    }
		} else {
		    append result " $arg"
		}
	    }
	}
	return $result
    }

    if {[info exists LD_FOR_TARGET]} {
	set LD "$LD_FOR_TARGET"
    } else {
	if {![board_info target exists linker]} {
	    set LD [find_ld]
	} else {
	    set LD [board_info target linker]
	}
    }

    if {[info exists LDFLAGS_FOR_TARGET]} {
	append flags " $LDFLAGS_FOR_TARGET"
    }

    # `ldflags' consists of arguments to gcc (that are then
    # passed to ld), not arguments to ld directly.
    # We need the -L's.
    if {[board_info $board exists ldflags]} {
	set ldflags [board_info $board ldflags]
	set ldflags [only--Ls $ldflags]
	append flags " $ldflags"
    }

    if {[board_info $board exists ldscript]} {
	# strip leading -Wl, if present
	set ldscript [board_info $board ldscript]
	regsub "^-Wl," $ldscript "" ldscript
	append flags " $ldscript"
    }

    if {[is_remote host]} {
	set nobjects ""
	foreach x $objects {
	    set nobjects "$nobjects [remote_download host $x]"
	}
	set objects "$nobjects"
	set dest "a.out"
    } else {
	set dest $destfile
    }
    set status [remote_exec host "$LD $objects $flags -o $dest"]
    if {[is_remote host]} {
	remote_upload host $dest $destfile
    }

    set comp_output [prune_warnings [lindex $status 1]]
    if { [lindex $status 0] != 0 } {
	verbose -log "linker exited with status [lindex $status 0]"
    }
    if { [lindex $status 1] != "" } {
	verbose -log "linker output is:\n[lindex $status 1]" 2
    }
    return ${comp_output}
}