ld/testsuite/lib/ld-lib.exp

   1 # Support routines for LD testsuite.
   2 #   Copyright (C) 1994-2020 Free Software Foundation, Inc.
   3 #
   4 # This file is part of the GNU Binutils.
   5 #
   6 # This file is free software; you can redistribute it and/or modify
   7 # it under the terms of the GNU General Public License as published by
   8 # the Free Software Foundation; either version 3 of the License, or
   9 # (at your option) any later version.
  10 #
  11 # This program is distributed in the hope that it will be useful,
  12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 # GNU General Public License for more details.
  15 #
  16 # You should have received a copy of the GNU General Public License
  17 # along with this program; if not, write to the Free Software
  18 # Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
  19 # MA 02110-1301, USA.
  20
  21 proc load_common_lib { name } {
  22     global srcdir
  23     load_file $srcdir/../../binutils/testsuite/lib/$name
  24 }
  25
  26 load_common_lib binutils-common.exp
  27
  28 # Returns 1 if the gcc for the target is at least version MAJOR.MINOR
  29 # Returns 0 otherwise.
  30 #
  31 proc at_least_gcc_version { major minor } {
  32     global CC
  33
  34     if {![info exists CC]} {
  35         set CC [find_gcc]
  36     }
  37     if { $CC == "" } {
  38         return 0
  39     }
  40     set state [remote_exec host $CC --version]
  41     if { [lindex $state 0] != 0 } {
  42         return 0;
  43     }
  44     set tmp "[lindex $state 1]\n"
  45     # Look for (eg) 4.6.1 in the version output.
  46     set ver_re "\[^\\.0-9\]+(\[1-9\]\[0-9\]*)\\.(\[0-9\]+)(?:\\.\[0-9\]+)?"
  47     regexp $ver_re $tmp fred maj min
  48     verbose "gcc version: $tmp"
  49     if { ![info exists maj] || ![info exists min] } then {
  50         perror "can't decipher gcc version number, fix the framework!"
  51         return 0
  52     }
  53     verbose "major gcc version is $maj, want at least $major"
  54     if { $maj == $major } then {
  55         verbose "minor gcc version is $min, want at least $minor"
  56         return [expr $min >= $minor]
  57     } else {
  58         return [expr $maj > $major]
  59     }
  60 }
  61
  62 # Extract and print the version number of ld.
  63 #
  64 proc default_ld_version { ld } {
  65     global host_triplet
  66
  67     if { ![is_remote host] && [which $ld] == 0 } then {
  68         perror "$ld does not exist"
  69         exit 1
  70     }
  71
  72     remote_exec host "$ld --version" "" "/dev/null" "ld.version"
  73     remote_upload host "ld.version"
  74     set tmp [prune_warnings [file_contents "ld.version"]]
  75     remote_file build delete "ld.version"
  76     remote_file host delete "ld.version"
  77
  78     regexp "\[^\n\]* (cygnus-|)(\[-0-9.a-zA-Z-\]+)\[\r\n\].*" $tmp version cyg number
  79     if [info exists number] then {
  80         clone_output "$ld $number\n"
  81     }
  82 }
  83
  84 proc run_host_cmd { prog command } {
  85     global link_output
  86     global gcc_B_opt
  87     global ld_L_opt
  88     global gcc_ld_B_opt_tested
  89     global ld
  90
  91     if { ![is_remote host] && [which "$prog"] == 0 } then {
  92         perror "$prog does not exist"
  93         return 0
  94     }
  95
  96     # If we are compiling with gcc, we want to add gcc_B_opt and
  97     # ld_L_opt to flags.  However, if $prog already has -B options,
  98     # which might be the case when running gcc out of a build
  99     # directory, we want our -B options to come first.
 100     set gccexe $prog
 101     set gccparm [string first " " $gccexe]
 102     set gccflags ""
 103     if { $gccparm > 0 } then {
 104         set gccflags [string range $gccexe $gccparm end]
 105         set gccexe [string range $gccexe 0 $gccparm]
 106         set prog $gccexe
 107     }
 108     set gccexe [string replace $gccexe 0 [string last "/" $gccexe] ""]
 109     if {[string match "*cc*" $gccexe] || [string match "*++*" $gccexe]} then {
 110         set gccflags "$gcc_B_opt $gccflags $ld_L_opt"
 111         if {![info exists gcc_ld_B_opt_tested]} {
 112             set gcc_ld_B_opt_tested 1
 113             set ld_version_message [run_host_cmd "$ld" "--version"]
 114             set gcc_ld_version_message [run_host_cmd "$prog" "$gccflags -Wl,--version"]
 115             if {[string first $ld_version_message $gcc_ld_version_message] < 0} {
 116                 perror "************************************************************************"
 117                 perror "Your compiler driver ignores -B when choosing ld."
 118                 perror "You will not be testing the new ld in many of the following tests."
 119                 set gcc_ld_version [run_host_cmd "$prog" "$gccflags --print-prog-name=ld"]
 120                 if {![string match "" $gcc_ld_version] && ![string match "ld" $gcc_ld_version]} {
 121
 122                     perror "It seems you will be testing $gcc_ld_version instead."
 123                 }
 124                 perror "************************************************************************"
 125             }
 126         }
 127     }
 128
 129     verbose -log "$prog $gccflags $command"
 130     set status [remote_exec host [concat sh -c [list "$prog $gccflags $command 2>&1"]] "" "/dev/null" "ld.tmp"]
 131     remote_upload host "ld.tmp"
 132     set link_output [file_contents "ld.tmp"]
 133     regsub "\n$" $link_output "" link_output
 134     if { [lindex $status 0] != 0 && [string match "" $link_output] } then {
 135         append link_output "child process exited abnormally"
 136     }
 137     remote_file build delete ld.tmp
 138     remote_file host delete ld.tmp
 139
 140     if [string match "" $link_output] then {
 141         return ""
 142     }
 143
 144     verbose -log "$link_output"
 145     return "$link_output"
 146 }
 147
 148 proc run_host_cmd_yesno { prog command } {
 149     global exec_output
 150     global errcnt warncnt
 151
 152     set exec_output [prune_warnings [run_host_cmd "$prog" "$command"]]
 153     # Ignore error and warning.
 154     set errcnt 0
 155     set warncnt 0
 156     if [string match "" $exec_output] then {
 157         return 1;
 158     }
 159     return 0;
 160 }
 161
 162 # Link an object using relocation.
 163 #
 164 proc default_ld_relocate { ld target objects } {
 165     global HOSTING_EMU
 166
 167     remote_file host delete $target
 168     return [run_host_cmd_yesno "$ld" "$HOSTING_EMU -o $target -r $objects"]
 169 }
 170
 171 # Check to see if ld is being invoked with a non-endian output format
 172 #
 173 proc is_endian_output_format { object_flags } {
 174
 175     if {[string match "*-oformat binary*" $object_flags] ||      \
 176         [string match "*-oformat ieee*" $object_flags] ||        \
 177         [string match "*-oformat ihex*" $object_flags] ||        \
 178         [string match "*-oformat netbsd-core*" $object_flags] || \
 179         [string match "*-oformat srec*" $object_flags] ||        \
 180         [string match "*-oformat tekhex*" $object_flags] ||      \
 181         [string match "*-oformat trad-core*" $object_flags] } then {
 182         return 0
 183     } else {
 184         return 1
 185     }
 186 }
 187
 188 # Link a program using ld
 189 #
 190 proc default_ld_link { ld target objects } {
 191     global host_triplet
 192     global exec_output
 193
 194     set flags ""
 195     if [is_endian_output_format $objects] then {
 196         set flags [big_or_little_endian]
 197     }
 198
 199     remote_file host delete $target
 200     set exec_output [run_host_cmd "$ld" "$flags -o $target $objects"]
 201     set exec_output [prune_warnings $exec_output]
 202
 203     # We don't care if we get a warning about a non-existent start
 204     # symbol, since the default linker script might use ENTRY.
 205     regsub -all "(^|\n)(\[^\n\]*: warning: cannot find entry symbol\[^\n\]*\n?)" $exec_output "\\1" exec_output
 206
 207     return [string match "" $exec_output]
 208 }
 209
 210 # Compile an object using cc.
 211 #
 212 proc default_ld_compile { cc source object } {
 213     global CFLAGS
 214     global CXXFLAGS
 215     global srcdir
 216     global subdir
 217     global host_triplet
 218     global gcc_B_opt
 219
 220     set cc_prog $cc
 221     if {[llength $cc_prog] > 1} then {
 222         set cc_prog [lindex $cc_prog 0]
 223     }
 224     if {![is_remote host] && [which $cc_prog] == 0} then {
 225         perror "$cc_prog does not exist"
 226         return 0
 227     }
 228
 229     remote_file build delete "$object"
 230     remote_file host delete "$object"
 231
 232     set flags "$gcc_B_opt -I$srcdir/$subdir"
 233
 234     # If we are compiling with gcc, we want to add gcc_B_opt to flags.
 235     # However, if $prog already has -B options, which might be the
 236     # case when running gcc out of a build directory, we want our -B
 237     # options to come first.
 238     set ccexe $cc
 239     set ccparm [string first " " $cc]
 240     set ccflags ""
 241     if { $ccparm > 0 } then {
 242         set ccflags [string range $cc $ccparm end]
 243         set ccexe [string range $cc 0 $ccparm]
 244         set cc $ccexe
 245     }
 246
 247     set ccexe [string replace $ccexe 0 [string last "/" $ccexe] ""]
 248     if {[string match "*++*" $ccexe]} {
 249         append flags " $CXXFLAGS"
 250     } else {
 251         append flags " $CFLAGS"
 252     }
 253
 254     if [board_info [target_info name] exists cflags] {
 255         append flags " [board_info [target_info name] cflags]"
 256     }
 257
 258     if [board_info [target_info name] exists multilib_flags] {
 259         append flags " [board_info [target_info name] multilib_flags]"
 260     }
 261
 262     set cmd "$cc $flags $ccflags -c $source -o $object"
 263     verbose -log "$cmd"
 264
 265     set status [remote_exec host [concat sh -c [list "$cmd 2>&1"]] "" "/dev/null" "ld.tmp"]
 266     remote_upload host "ld.tmp"
 267     set exec_output [file_contents "ld.tmp"]
 268     remote_file build delete "ld.tmp"
 269     remote_file host delete "ld.tmp"
 270     set exec_output [prune_warnings $exec_output]
 271     # Versions of gcc up to and including pre-release gcc-7, at least on
 272     # some targets, generate .section directives with incorrect type.
 273     # Ignore warnings from the assembler about this.
 274     regsub -all "(^|\n)\[^\n\]*: ignoring incorrect section type \[^\n\]*" $exec_output "" exec_output
 275     regsub -all "^\[^\n\]*: Assembler messages:\n" $exec_output "" exec_output
 276     if [string match "" $exec_output] then {
 277         if {![file exists $object]} then {
 278             regexp ".*/(\[^/\]*)$" $source all dobj
 279             regsub "\\.c" $dobj ".o" realobj
 280             verbose "looking for $realobj"
 281             if {[remote_file host exists $realobj]} then {
 282                 verbose -log "mv $realobj $object"
 283                 remote_upload "$realobj" "$object"
 284             } else {
 285                 perror "$object not found after compilation"
 286                 return 0
 287             }
 288         }
 289         return 1
 290     } else {
 291         verbose -log "$exec_output"
 292         perror "$source: compilation failed"
 293         return 0
 294     }
 295 }
 296
 297 # Assemble a file.
 298 #
 299 proc default_ld_assemble { as in_flags source object } {
 300     global ASFLAGS
 301     global host_triplet
 302     global srcdir
 303     global subdir
 304
 305     if ![info exists ASFLAGS] { set ASFLAGS "" }
 306
 307     set flags "[big_or_little_endian] -I$srcdir/$subdir"
 308     set exec_output [run_host_cmd "$as" "$flags $in_flags $ASFLAGS -o $object $source"]
 309     set exec_output [prune_warnings $exec_output]
 310     if [string match "" $exec_output] then {
 311         return 1
 312     } else {
 313         perror "$source: assembly failed"
 314         return 0
 315     }
 316 }
 317
 318 # Run nm on a file, putting the result in the array nm_output.
 319 #
 320 proc default_ld_nm { nm nmflags object } {
 321     global NMFLAGS
 322     global nm_output
 323     global host_triplet
 324
 325     if {[info exists nm_output]} {
 326       unset nm_output
 327     }
 328
 329     if ![info exists NMFLAGS] { set NMFLAGS "" }
 330
 331     # Ensure consistent sorting of symbols
 332     if {[info exists env(LC_ALL)]} {
 333         set old_lc_all $env(LC_ALL)
 334     }
 335     set env(LC_ALL) "C"
 336
 337     verbose -log "$nm $NMFLAGS $nmflags $object >tmpdir/nm.out"
 338
 339     set status [remote_exec host [concat sh -c [list "$nm $NMFLAGS $nmflags $object 2>ld.stderr"]] "" "/dev/null" "tmpdir/nm.out"]
 340     if {[info exists old_lc_all]} {
 341         set env(LC_ALL) $old_lc_all
 342     } else {
 343         unset env(LC_ALL)
 344     }
 345     remote_upload host "ld.stderr"
 346     remote_upload host "tmpdir/nm.out" "tmpdir/nm.out"
 347     set exec_output [prune_warnings [file_contents "ld.stderr"]]
 348     remote_file host delete "ld.stderr"
 349     remote_file build delete "ld.stderr"
 350     if [string match "" $exec_output] then {
 351         set file [open tmpdir/nm.out r]
 352         while { [gets $file line] != -1 } {
 353             verbose "$line" 2
 354             if [regexp "^(\[0-9a-fA-F\]+) \[a-zA-Z0-9\] \\.*(.+)$" $line whole value name] {
 355                 set name [string trimleft $name "_"]
 356                 verbose "Setting nm_output($name) to 0x$value" 2
 357                 set nm_output($name) 0x$value
 358             }
 359         }
 360         close $file
 361         return 1
 362     } else {
 363         verbose -log "$exec_output"
 364         perror "$object: nm failed"
 365         return 0
 366     }
 367 }
 368
 369 # Define various symbols needed when not linking against all
 370 # target libs.
 371 proc ld_link_defsyms {} {
 372
 373     set flags "--defsym __stack_chk_fail=0"
 374
 375     # ARM targets call __gccmain
 376     if {[istarget arm*-*-*]} {
 377         append flags " --defsym __gccmain=0"
 378     }
 379
 380     # Windows targets need __main, some prefixed with underscore.
 381     if {[istarget *-*-cygwin* ] || [istarget *-*-mingw*]} {
 382         append flags " --defsym __main=0 --defsym ___main=0"
 383     }
 384
 385     # PowerPC EABI code calls __eabi.
 386     if {[istarget powerpc*-*-eabi*] || [istarget powerpc*-*-rtems*]} {
 387         append flags " --defsym __eabi=0"
 388     }
 389
 390     # mn10200 code calls __truncsipsi2_d0_d2.
 391     if {[istarget mn10200*-*-*]} then {
 392         append flags " --defsym __truncsipsi2_d0_d2=0"
 393     }
 394
 395     # m6811/m6812 code has references to soft registers.
 396     if {[istarget m6811-*-*] || [istarget m6812-*-*] || [istarget m68hc1*-*-*]} {
 397         append flags " --defsym _.frame=0 --defsym _.d1=0 --defsym _.d2=0"
 398         append flags " --defsym _.d3=0 --defsym _.d4=0"
 399         append flags " --defsym _.tmp=0 --defsym _.xy=0 --defsym _.z=0"
 400     }
 401
 402     # Some OpenBSD targets have ProPolice and reference __guard and
 403     # __stack_smash_handler.
 404     if [istarget *-*-openbsd*] {
 405         append flags " --defsym __guard=0"
 406         append flags " --defsym __stack_smash_handler=0"
 407     }
 408
 409     return $flags
 410 }
 411
 412 # Create an archive using ar
 413 #
 414 proc ar_simple_create { ar aropts target objects } {
 415     remote_file host delete $target
 416
 417     set exec_output [run_host_cmd "$ar" "-rc $aropts $target $objects"]
 418     set exec_output [prune_warnings $exec_output]
 419
 420     if [string match "" $exec_output] then {
 421         send_log "$exec_output\n"
 422         return 1
 423     } else {
 424         return 0
 425     }
 426 }
 427
 428 # List contains test-items with 3 items followed by 2 lists, one item and
 429 # one optional item:
 430 #  0:name
 431 #  1:ld/ar leading options, placed before object files
 432 #  2:ld/ar trailing options, placed after object files
 433 #  3:assembler options
 434 #  4:filenames of assembler files
 435 #  5:list of actions, options and expected outputs.
 436 #  6:name of output file
 437 #  7:compiler flags (optional)
 438 #
 439 # Actions: { command command-line-options file-containg-expected-output-regexps }
 440 # Commands:
 441 #   objdump: Apply objdump options on result.
 442 #   nm: Apply nm options on result.
 443 #   readelf: Apply readelf options on result.
 444 #   ld: Don't apply anything on result.  Compare output during linking with
 445 #     the file containing regexps (which is the second arg, not the third).
 446 #     Note that this *must* be the first action if it is to be used at all;
 447 #     in all other cases, any output from the linker during linking is
 448 #     treated as a sign of an error and FAILs the test.
 449 #
 450 # args is an optional list of target triplets to be xfailed.
 451 #
 452 proc run_ld_link_tests { ldtests args } {
 453     global ld
 454     global as
 455     global nm
 456     global ar
 457     global objdump
 458     global READELF
 459     global srcdir
 460     global subdir
 461     global env
 462     global CC
 463     global CFLAGS
 464     global runtests
 465     global exec_output
 466     global ld_elf_shared_opt
 467
 468     if { [is_elf_format] && [check_shared_lib_support] } {
 469         set ld_extra_opt "$ld_elf_shared_opt"
 470     } else {
 471         set ld_extra_opt ""
 472     }
 473
 474     foreach testitem $ldtests {
 475         set testname [lindex $testitem 0]
 476
 477         if ![runtest_file_p $runtests $testname] then {
 478             continue
 479         }
 480
 481         foreach target $args {
 482             if [match_target $target] {
 483                 setup_xfail "*-*-*"
 484                 break
 485             }
 486         }
 487
 488         set ld_options [lindex $testitem 1]
 489         set ld_after [lindex $testitem 2]
 490         set as_options [lindex $testitem 3]
 491         set src_files  [lindex $testitem 4]
 492         set actions [lindex $testitem 5]
 493         set binfile tmpdir/[lindex $testitem 6]
 494         set cflags [lindex $testitem 7]
 495         set objfiles {}
 496         set is_unresolved 0
 497         set failed 0
 498         set maybe_failed 0
 499         set ld_output ""
 500
 501 #       verbose -log "Testname is $testname"
 502 #       verbose -log "ld_options is $ld_options"
 503 #       verbose -log "ld_after is $ld_after"
 504 #       verbose -log "as_options is $as_options"
 505 #       verbose -log "src_files is $src_files"
 506 #       verbose -log "actions is $actions"
 507 #       verbose -log "binfile is $binfile"
 508
 509         # Assemble each file in the test.
 510         foreach src_file $src_files {
 511             set fileroot "[file rootname [file tail $src_file]]"
 512             set objfile "tmpdir/$fileroot.o"
 513             lappend objfiles $objfile
 514
 515             if { [file extension $src_file] == ".c" } {
 516                 set as_file "tmpdir/$fileroot.s"
 517                 if ![ld_compile "$CC -S $CFLAGS $cflags" $srcdir/$subdir/$src_file $as_file] {
 518                     set is_unresolved 1
 519                     break
 520                 }
 521             } else {
 522                 set as_file "$srcdir/$subdir/$src_file"
 523             }
 524             if ![ld_assemble $as "$as_options $as_file" $objfile] {
 525                 set is_unresolved 1
 526                 break
 527             }
 528         }
 529
 530         # Catch assembler errors.
 531         if { $is_unresolved } {
 532             unresolved $testname
 533             continue
 534         }
 535
 536         if { $binfile eq "tmpdir/" } {
 537             # compile only
 538         } elseif { [regexp ".*\\.a$" $binfile] } {
 539             if { ![ar_simple_create $ar $ld_options $binfile "$objfiles $ld_after"] } {
 540                 set failed 1
 541             }
 542         } elseif { ![ld_link $ld $binfile "$ld_extra_opt -L$srcdir/$subdir $ld_options $objfiles $ld_after"] } {
 543             set maybe_failed 1
 544             set ld_output "$exec_output"
 545         }
 546
 547         if { !$failed } {
 548             foreach actionlist $actions {
 549                 set action [lindex $actionlist 0]
 550                 set progopts [lindex $actionlist 1]
 551
 552                 # There are actions where we run regexp_diff on the
 553                 # output, and there are other actions (presumably).
 554                 # Handling of the former look the same.
 555                 set dump_prog ""
 556                 switch -- $action {
 557                     objdump
 558                         { set dump_prog $objdump }
 559                     nm
 560                         { set dump_prog $nm }
 561                     readelf
 562                         { set dump_prog $READELF }
 563                     ld
 564                         { set dump_prog "ld" }
 565                     default
 566                         {
 567                             perror "Unrecognized action $action"
 568                             set is_unresolved 1
 569                             break
 570                         }
 571                     }
 572
 573                 if { $action == "ld" } {
 574                     set regexpfile $progopts
 575                     verbose "regexpfile is $srcdir/$subdir/$regexpfile"
 576                     set_file_contents "tmpdir/ld.messages" "$ld_output"
 577                     verbose "ld.messages has '[file_contents tmpdir/ld.messages]'"
 578                     if { [regexp_diff "tmpdir/ld.messages" "$srcdir/$subdir/$regexpfile"] } then {
 579                         verbose "output is $ld_output" 2
 580                         set failed 1
 581                         break
 582                     }
 583                     set maybe_failed 0
 584                 } elseif { !$maybe_failed && $dump_prog != "" } {
 585                     set dumpfile [lindex $actionlist 2]
 586                     set binary $dump_prog
 587
 588                     # Ensure consistent sorting of symbols
 589                     if {[info exists env(LC_ALL)]} {
 590                         set old_lc_all $env(LC_ALL)
 591                     }
 592                     set env(LC_ALL) "C"
 593                     set cmd "$binary $progopts $binfile"
 594                     set status [remote_exec host [concat sh -c [list "$cmd >dump.out 2>ld.stderr"]] "" "/dev/null"]
 595                     send_log "$cmd\n"
 596                     remote_upload host "ld.stderr"
 597                     set comp_output [prune_warnings [file_contents "ld.stderr"]]
 598                     remote_file host delete "ld.stderr"
 599                     remote_file build delete "ld.stderr"
 600
 601                     if {[info exists old_lc_all]} {
 602                         set env(LC_ALL) $old_lc_all
 603                     } else {
 604                         unset env(LC_ALL)
 605                     }
 606
 607                     if ![string match "" $comp_output] then {
 608                         send_log "$comp_output\n"
 609                         set failed 1
 610                         break
 611                     }
 612
 613                     remote_upload host "dump.out"
 614
 615                     if { [regexp_diff "dump.out" "$srcdir/$subdir/$dumpfile"] } then {
 616                         verbose "output is [file_contents "dump.out"]" 2
 617                         set failed 1
 618                         remote_file build delete "dump.out"
 619                         remote_file host delete "dump.out"
 620                         break
 621                     }
 622                     remote_file build delete "dump.out"
 623                     remote_file host delete "dump.out"
 624                 }
 625             }
 626         }
 627
 628         if { $is_unresolved } {
 629             unresolved $testname
 630         } elseif { $maybe_failed || $failed } {
 631             fail $testname
 632         } else {
 633             pass $testname
 634         }
 635     }
 636 }
 637
 638 # ldtests contains test-items with 3 items followed by 1 lists, 2 items
 639 # and 3 optional items:
 640 #   0:name
 641 #   1:ld leading options, placed before object files
 642 #   2:assembler options
 643 #   3:filenames of source files
 644 #   4:name of output file
 645 #   5:expected output
 646 #   6:compiler flags (optional)
 647 #   7:language (optional)
 648 #   8:linker warning (optional)
 649 #   9:ld trailing options, placed after object files (optional)
 650 # args is an optional list of target triplets to be xfailed.
 651
 652 proc run_ld_link_exec_tests { ldtests args } {
 653     global ld
 654     global as
 655     global srcdir
 656     global subdir
 657     global env
 658     global CC
 659     global CXX
 660     global CFLAGS
 661     global CXXFLAGS
 662     global errcnt
 663     global exec_output
 664     global board_cflags
 665     global STATIC_LDFLAGS
 666
 667     # When using GCC as the linker driver, we need to specify board cflags when
 668     # linking because cflags may contain linker options.  For example when
 669     # linker options are included in GCC spec files then we need the -specs
 670     # option.
 671     if [board_info [target_info name] exists cflags] {
 672         set board_cflags " [board_info [target_info name] cflags]"
 673     } else {
 674         set board_cflags ""
 675     }
 676
 677     foreach testitem $ldtests {
 678         set testname [lindex $testitem 0]
 679         set ld_options [lindex $testitem 1]
 680         set as_options [lindex $testitem 2]
 681         set src_files  [lindex $testitem 3]
 682         set binfile tmpdir/[lindex $testitem 4]
 683         set expfile [lindex $testitem 5]
 684         set cflags [lindex $testitem 6]
 685         set lang [lindex $testitem 7]
 686         set warning [lindex $testitem 8]
 687         set ld_after [lindex $testitem 9]
 688         set objfiles {}
 689         set failed 0
 690
 691         if { ![check_compiler_available] } {
 692             unsupported $testname
 693             continue
 694         }
 695
 696         foreach target $args {
 697             if [match_target $target] {
 698                 setup_xfail "*-*-*"
 699                 break
 700             }
 701         }
 702
 703 #       verbose -log "Testname is $testname"
 704 #       verbose -log "ld_options is $ld_options"
 705 #       verbose -log "as_options is $as_options"
 706 #       verbose -log "src_files is $src_files"
 707 #       verbose -log "binfile is $binfile"
 708
 709         # Assemble each file in the test.
 710         foreach src_file $src_files {
 711             set fileroot "[file rootname [file tail $src_file]]"
 712             set objfile "tmpdir/$fileroot.o"
 713             lappend objfiles $objfile
 714
 715             if { [ string match "c++" $lang ] } {
 716                 set cmd "$CXX -c $CXXFLAGS $cflags"
 717             } else {
 718                 set cmd "$CC -c $CFLAGS $cflags"
 719             }
 720             if ![ld_compile $cmd $srcdir/$subdir/$src_file $objfile] {
 721                 set failed 1
 722                 break
 723             }
 724         }
 725         if { $failed != 0 } {
 726             unresolved $testname
 727             continue
 728         }
 729
 730         if { [ string match "asm" $lang ] } {
 731             set link_proc ld_link
 732             set link_cmd $ld
 733         } elseif { [ string match "c++" $lang ] } {
 734             set link_proc ld_link
 735             set link_cmd $CXX
 736         } else {
 737             set link_proc ld_link
 738             set link_cmd $CC
 739         }
 740
 741         if { $binfile eq "tmpdir/" } {
 742             # compile only
 743             pass $testname
 744             continue;
 745         } else {
 746             if { [string match "" $STATIC_LDFLAGS] \
 747                  && [regexp -- ".* \[-\]+static .*" " $board_cflags $ld_options $objfiles $ld_after "] } {
 748                 untested $testname
 749                 continue
 750             }
 751             if ![$link_proc $link_cmd $binfile "$board_cflags -L$srcdir/$subdir $ld_options $objfiles $ld_after"] {
 752                 set failed 1
 753             }
 754         }
 755
 756         # Check if exec_output is expected.
 757         if { $warning != "" } then {
 758             verbose -log "returned with: <$exec_output>, expected: <$warning>"
 759             if { [regexp $warning $exec_output] } then {
 760                 set failed 0
 761             } else {
 762                 set failed 1
 763             }
 764         }
 765
 766         if { $failed == 0 && [isnative] } {
 767             send_log "Running: $binfile > $binfile.out\n"
 768             verbose "Running: $binfile > $binfile.out"
 769             catch "exec $binfile > $binfile.out" exec_output
 770
 771             if ![string match "" $exec_output] then {
 772                 send_log "$exec_output\n"
 773                 verbose "$exec_output" 1
 774                 set failed 1
 775             } else {
 776                 send_log "diff $binfile.out $srcdir/$subdir/$expfile\n"
 777                 verbose "diff $binfile.out $srcdir/$subdir/$expfile"
 778                 catch "exec diff $binfile.out $srcdir/$subdir/$expfile" exec_output
 779                 set exec_output [prune_warnings $exec_output]
 780
 781                 if ![string match "" $exec_output] then {
 782                     send_log "$exec_output\n"
 783                     verbose "$exec_output" 1
 784                     set failed 1
 785                 }
 786             }
 787         }
 788
 789         if { $failed != 0 } {
 790             fail $testname
 791         } elseif ![isnative] {
 792             unsupported $testname
 793         } else {
 794             set errcnt 0
 795             pass $testname
 796         }
 797     }
 798 }
 799
 800 # List contains test-items with 3 items followed by 2 lists, one item and
 801 # one optional item:
 802 #  0:name
 803 #  1:ld or ar options
 804 #  2:compile options
 805 #  3:filenames of source files
 806 #  4:action and options.
 807 #  5:name of output file
 808 #  6:language (optional)
 809 #
 810 # Actions:
 811 # objdump: Apply objdump options on result.  Compare with regex (last arg).
 812 # nm: Apply nm options on result.  Compare with regex (last arg).
 813 # readelf: Apply readelf options on result.  Compare with regex (last arg).
 814 # warning: Check linker output against regex (last arg).
 815 # error: Like 'warning' but checking output in error case.
 816 # warning_output: Check linker output against regex in a file (last arg).
 817 # error_output: Like 'warning_output' but checking output in error case.
 818 #
 819 proc run_cc_link_tests { ldtests } {
 820     global nm
 821     global objdump
 822     global READELF
 823     global srcdir
 824     global subdir
 825     global env
 826     global CC
 827     global CXX
 828     global CFLAGS
 829     global CXXFLAGS
 830     global ar
 831     global exec_output
 832     global board_cflags
 833     global STATIC_LDFLAGS
 834
 835     if [board_info [target_info name] exists cflags] {
 836         set board_cflags " [board_info [target_info name] cflags]"
 837     } else {
 838         set board_cflags ""
 839     }
 840
 841     foreach testitem $ldtests {
 842         set testname [lindex $testitem 0]
 843         set ldflags [lindex $testitem 1]
 844         set cflags [lindex $testitem 2]
 845         set src_files  [lindex $testitem 3]
 846         set actions [lindex $testitem 4]
 847         set binfile tmpdir/[lindex $testitem 5]
 848         set lang [lindex $testitem 6]
 849         set objfiles {}
 850         set is_unresolved 0
 851         set failed 0
 852         set check_ld(terminal) 0
 853         set check_ld(source) ""
 854
 855         if { ![check_compiler_available] } {
 856             unsupported $testname
 857             continue
 858         }
 859
 860         #verbose -log "testname  is $testname"
 861         #verbose -log "ldflags   is $ldflags"
 862         #verbose -log "cflags    is $cflags"
 863         #verbose -log "src_files is $src_files"
 864         #verbose -log "actions   is $actions"
 865         #verbose -log "binfile   is $binfile"
 866         #verbose -log "lang      is $lang"
 867
 868         foreach actionlist $actions {
 869             set action [lindex $actionlist 0]
 870             set progopts [lindex $actionlist 1]
 871
 872             # Find actions related to error/warning processing.
 873             switch -- $action {
 874                 error
 875                 {
 876                     set check_ld(source) "regexp"
 877                     set check_ld(regexp) $progopts
 878                     set check_ld(terminal) 1
 879                 }
 880                 warning
 881                 {
 882                     set check_ld(source) "regexp"
 883                     set check_ld(regexp) $progopts
 884                 }
 885                 error_output
 886                 {
 887                     set check_ld(source) "file"
 888                     set check_ld(file) $progopts
 889                     set check_ld(terminal) 1
 890                 }
 891                 warning_output
 892                 {
 893                     set check_ld(source) "file"
 894                     set check_ld(file) $progopts
 895                 }
 896             }
 897         }
 898
 899         # Compile each file in the test.
 900         foreach src_file $src_files {
 901             set fileroot "[file rootname [file tail $src_file]]"
 902             set objfile "tmpdir/$fileroot.o"
 903             lappend objfiles $objfile
 904
 905             if { [ string match "c++" $lang ] } {
 906                 set cmd "$CXX -c $CXXFLAGS $cflags"
 907             } else {
 908                 set cmd "$CC -c $CFLAGS $cflags"
 909             }
 910             if ![ld_compile $cmd $srcdir/$subdir/$src_file $objfile] {
 911                 set failed 1
 912                 break
 913             }
 914         }
 915         if { $failed != 0 } {
 916             unresolved $testname
 917             continue
 918         }
 919
 920         # Clear error and warning counts.
 921         reset_vars
 922
 923         if { [ string match "c++" $lang ] } {
 924             set cc_cmd $CXX
 925         } else {
 926             set cc_cmd $CC
 927         }
 928
 929         if { $binfile eq "tmpdir/" } {
 930             # compile only
 931             set binfile $objfile
 932         } elseif { [regexp ".*\\.a$" $binfile] } {
 933             if { ![ar_simple_create $ar $ldflags $binfile "$objfiles"] } {
 934                 set failed 1
 935             }
 936         } else {
 937             if { [string match "" $STATIC_LDFLAGS] \
 938                  && [regexp -- ".* \[-\]+static .*" " $board_cflags $ldflags $objfiles "] } {
 939                 untested $testname
 940                 continue
 941             }
 942             ld_link $cc_cmd $binfile "$board_cflags -L$srcdir/$subdir $ldflags $objfiles"
 943             set ld_output "$exec_output"
 944
 945             if { $check_ld(source) == "regexp" } then {
 946                 # Match output against regexp argument.
 947                 verbose -log "returned with: <$ld_output>, expected: <$check_ld(regexp)>"
 948                 if { ![regexp $check_ld(regexp) $ld_output] } then {
 949                     set failed 1
 950                 }
 951             } elseif { $check_ld(source) == "file" } then {
 952                 # Match output against patterns in a file.
 953                 set_file_contents "tmpdir/ld.messages" "$ld_output"
 954                 verbose "ld.messages has '[file_contents tmpdir/ld.messages]'"
 955                 if { [regexp_diff "tmpdir/ld.messages" "$srcdir/$subdir/$check_ld(file)"] } then {
 956                     verbose "output is $ld_output" 2
 957                     set failed 1
 958                 }
 959             }
 960
 961             if { $check_ld(source) != "" } then {
 962                 if { $ld_output == "" } then {
 963                     verbose -log "Linker was expected to give error or warning"
 964                     set failed 1
 965                 }
 966             } else {
 967                 if { $ld_output != "" } then {
 968                     verbose -log "Unexpected linker warning or error"
 969                     set failed 1
 970                 }
 971             }
 972         }
 973
 974         if { $failed == 0 } {
 975             foreach actionlist $actions {
 976                 set action [lindex $actionlist 0]
 977                 set progopts [lindex $actionlist 1]
 978
 979                 # There are actions where we run regexp_diff on the
 980                 # output, and there are other actions (presumably).
 981                 # Handling of the former look the same.
 982                 set dump_prog ""
 983                 switch -- $action {
 984                     objdump
 985                         { set dump_prog $objdump }
 986                     nm
 987                         { set dump_prog $nm }
 988                     readelf
 989                         { set dump_prog $READELF }
 990                     error {}
 991                     warning {}
 992                     error_output {}
 993                     warning_output {}
 994                     default
 995                         {
 996                             perror "Unrecognized action $action"
 997                             set is_unresolved 1
 998                             break
 999                         }
1000                     }
1001
1002                 if { $dump_prog != "" } {
1003                     set dumpfile [lindex $actionlist 2]
1004                     set binary $dump_prog
1005
1006                     # Ensure consistent sorting of symbols
1007                     if {[info exists env(LC_ALL)]} {
1008                         set old_lc_all $env(LC_ALL)
1009                     }
1010                     set env(LC_ALL) "C"
1011                     set cmd "$binary $progopts $binfile > dump.out"
1012                     send_log "$cmd\n"
1013                     catch "exec $cmd" comp_output
1014                     if {[info exists old_lc_all]} {
1015                         set env(LC_ALL) $old_lc_all
1016                     } else {
1017                         unset env(LC_ALL)
1018                     }
1019                     set comp_output [prune_warnings $comp_output]
1020
1021                     if ![string match "" $comp_output] then {
1022                         send_log "$comp_output\n"
1023                         set failed 1
1024                         break
1025                     }
1026
1027                     if { [regexp_diff "dump.out" "$srcdir/$subdir/$dumpfile"] } then {
1028                         verbose "output is [file_contents "dump.out"]" 2
1029                         set failed 1
1030                         break
1031                     }
1032                 }
1033             }
1034         }
1035
1036         if { $failed } {
1037             fail $testname
1038         } elseif { $is_unresolved } {
1039             unresolved $testname
1040         } else {
1041             pass $testname
1042         }
1043     }
1044 }
1045
1046 # Returns true if --gc-sections is supported on the target.
1047
1048 proc check_gc_sections_available { } {
1049     global gc_sections_available_saved
1050     global ld
1051
1052     if {![info exists gc_sections_available_saved]} {
1053         # Some targets don't support gc-sections despite whatever's
1054         # advertised by ld's options.
1055         if {   [istarget alpha-*-*]
1056             || [istarget bpf-*-*]
1057             || [istarget d30v-*-*]
1058             || [istarget dlx-*-*]
1059             || [istarget hppa*64-*-*]
1060             || [istarget ia64-*-*]
1061             || [istarget mep-*-*]
1062             || [istarget mn10200-*-*]
1063             || [istarget pj*-*-*]
1064             || [istarget pru*-*-*]
1065             || [istarget s12z-*-*]
1066             || [istarget xgate-*-*]
1067             || [istarget z80-*-*] } {
1068             set gc_sections_available_saved 0
1069             return 0
1070         }
1071
1072         # elf2flt uses -q (--emit-relocs), which is incompatible with
1073         # --gc-sections.
1074         if { [board_info target exists ldflags]
1075              && [regexp " -elf2flt\[ =\]" " [board_info target ldflags] "] } {
1076             set gc_sections_available_saved 0
1077             return 0
1078         }
1079
1080         # Check if the ld used by gcc supports --gc-sections.
1081         # FIXME: this test is useless since ld --help always says
1082         # --gc-sections is available
1083         set ld_output [remote_exec host $ld "--help"]
1084         if { [ string first "--gc-sections" $ld_output ] >= 0 } {
1085             set gc_sections_available_saved 1
1086         } else {
1087             set gc_sections_available_saved 0
1088         }
1089     }
1090     return $gc_sections_available_saved
1091 }
1092
1093 # Return true if target uses genelf.em.
1094 proc uses_genelf { } {
1095     if { [istarget "d30v-*-*"]
1096          || [istarget "dlx-*-*"]
1097          || [istarget "fr30-*-*"]
1098          || ([istarget "frv-*-*"] && ![istarget "frv-*-linux*"])
1099          || [istarget "ft32-*-*"]
1100          || [istarget "iq2000-*-*"]
1101          || [istarget "mn10200-*-*"]
1102          || [istarget "msp430-*-*"]
1103          || [istarget "mt-*-*"]
1104          || [istarget "pj*-*-*"]
1105          || [istarget "s12z-*-*"]
1106          || [istarget "xgate-*-*"] } {
1107         return 1
1108     }
1109     return 0
1110 }
1111
1112 proc is_underscore_target { } {
1113     global is_underscore_target_saved
1114     global target_triplet
1115     global srcdir
1116
1117     if { ![info exists is_underscore_target_saved] } {
1118         set cmd "targ=$target_triplet . $srcdir/../../bfd/config.bfd &&"
1119         append cmd { echo "$targ_underscore"}
1120         verbose -log "$cmd"
1121         set status [catch {exec sh -c $cmd} result]
1122         if { $status == 0 && [string match "yes" $result] } {
1123             set is_underscore_target_saved 1
1124         } else {
1125             set is_underscore_target_saved 0
1126         }
1127     }
1128     return $is_underscore_target_saved
1129 }
1130
1131 # Returns true if the target ld supports the plugin API.
1132 proc check_plugin_api_available { } {
1133     global plugin_api_available_saved
1134     global ld
1135     if {![info exists plugin_api_available_saved]} {
1136         # Check if the ld used by gcc supports --plugin.
1137         set ld_output [remote_exec host $ld "--help"]
1138         if { [regexp -- "-plugin PLUGIN \[^\n\r\]*" $ld_output line]
1139              && ![regexp "ignored" $line] } {
1140             set plugin_api_available_saved 1
1141         } else {
1142             set plugin_api_available_saved 0
1143         }
1144     }
1145     return $plugin_api_available_saved
1146 }
1147
1148 # Sets ld_sysroot to the current sysroot (empty if not supported) and
1149 # returns true if the target ld supports sysroot.
1150 proc check_sysroot_available { } {
1151     global ld_sysroot_available_saved ld ld_sysroot
1152     if {![info exists ld_sysroot_available_saved]} {
1153         # Check if ld supports --sysroot *other* than empty.
1154         set ld_sysroot [string trimright [lindex [remote_exec host $ld "--print-sysroot"] 1]]
1155         if { $ld_sysroot == "" } {
1156             set ld_sysroot_available_saved 0
1157         } else {
1158             set ld_sysroot_available_saved 1
1159         }
1160     }
1161     return $ld_sysroot_available_saved
1162 }
1163
1164 # Return true if we can build a program with the compiler.
1165 # On some targets, CC might be defined, but libraries and startup
1166 # code might be missing or require special options that the ld test
1167 # harness doesn't know about.
1168
1169 proc check_compiler_available { } {
1170     global compiler_available_saved
1171     global CC
1172
1173     if {![info exists compiler_available_saved]} {
1174         if { [which $CC] == 0 } {
1175             set compiler_available_saved 0
1176             return 0
1177         }
1178
1179         set flags ""
1180         if [board_info [target_info name] exists cflags] {
1181             append flags " [board_info [target_info name] cflags]"
1182         }
1183         if [board_info [target_info name] exists ldflags] {
1184             append flags " [board_info [target_info name] ldflags]"
1185         }
1186
1187         set basename "tmpdir/compiler[pid]"
1188         set src ${basename}.c
1189         set output ${basename}.out
1190         set f [open $src "w"]
1191         puts $f "int main (void)"
1192         puts $f "{"
1193         puts $f "  return 0; "
1194         puts $f "}"
1195         close $f
1196         if [is_remote host] {
1197             set src [remote_download host $src]
1198         }
1199         set compiler_available_saved [run_host_cmd_yesno "$CC" "$flags $src -o $output"]
1200         remote_file host delete $src
1201         remote_file host delete $output
1202         file delete $src
1203     }
1204     return $compiler_available_saved
1205 }
1206
1207 # Returns 1 if plugin is enabled in gcc.  Returns 0 otherwise.
1208 proc check_gcc_plugin_enabled { } {
1209     global CC
1210
1211     if {![info exists CC]} {
1212         set CC [find_gcc]
1213     }
1214     if { $CC == ""} {
1215         return 0
1216     }
1217     set state [remote_exec host $CC -v]
1218     if { [lindex $state 0] != 0 } {
1219         return 0;
1220     }
1221     for { set i 1 } { $i < [llength $state] } { incr i } {
1222         set v [lindex $state $i]
1223         if { [ string match "*--disable-plugin*" $v ] } {
1224             verbose "plugin is disabled by $v"
1225             return 0;
1226         }
1227     }
1228
1229     return 1;
1230 }
1231
1232 # Returns true if the target compiler supports LTO
1233 proc check_lto_available { } {
1234     global lto_available_saved
1235     global CC
1236
1237     if {![info exists lto_available_saved]} {
1238         if { ![check_gcc_plugin_enabled] } {
1239             set lto_available_saved 0
1240             return 0
1241         }
1242         # This test will hide LTO bugs in ld.  Since GCC 4.9 adds
1243         # -ffat-lto-objects, we always run LTO tests on Linux with
1244         # GCC 4.9 or newer.
1245         if { [istarget "*-*-linux*"] && [at_least_gcc_version 4 9] } {
1246             set lto_available_saved 1
1247             return 1
1248         }
1249         # Check if gcc supports -flto -fuse-linker-plugin
1250         set flags ""
1251         if [board_info [target_info name] exists cflags] {
1252             append flags " [board_info [target_info name] cflags]"
1253         }
1254         if [board_info [target_info name] exists ldflags] {
1255             append flags " [board_info [target_info name] ldflags]"
1256         }
1257
1258         set basename "tmpdir/lto[pid]"
1259         set src ${basename}.c
1260         set output ${basename}.out
1261         set f [open $src "w"]
1262         puts $f "int main() { return 0; }"
1263         close $f
1264         if [is_remote host] {
1265             set src [remote_download host $src]
1266         }
1267         set lto_available_saved [run_host_cmd_yesno "$CC" "$flags -flto -fuse-linker-plugin $src -o $output"]
1268         remote_file host delete $src
1269         remote_file host delete $output
1270         file delete $src
1271     }
1272     return $lto_available_saved
1273 }
1274
1275 # Returns true if the target compiler supports LTO  -ffat-lto-objects
1276 proc check_lto_fat_available { } {
1277     global lto_fat_available_saved
1278     global CC
1279
1280     if {![info exists lto_fat_available_saved]} {
1281         if { ![check_gcc_plugin_enabled] } {
1282             set lto_fat_available_saved 0
1283             return 0
1284         }
1285         # This test will hide LTO bugs in ld.  Since GCC 4.9 adds
1286         # -ffat-lto-objects, we always run LTO tests on Linux with
1287         # GCC 4.9 or newer.
1288         if { [istarget "*-*-linux*"] && [at_least_gcc_version 4 9] } {
1289             set lto_fat_available_saved 1
1290             return 1
1291         }
1292         # Check if gcc supports -flto -fuse-linker-plugin
1293         set flags ""
1294         if [board_info [target_info name] exists cflags] {
1295             append flags " [board_info [target_info name] cflags]"
1296         }
1297         if [board_info [target_info name] exists ldflags] {
1298             append flags " [board_info [target_info name] ldflags]"
1299         }
1300
1301         set basename "tmpdir/lto[pid]"
1302         set src ${basename}.c
1303         set output ${basename}.out
1304         set f [open $src "w"]
1305         puts $f "int main() { return 0; }"
1306         close $f
1307         if [is_remote host] {
1308             set src [remote_download host $src]
1309         }
1310         set lto_fat_available_saved [run_host_cmd_yesno "$CC" "$flags -flto -ffat-lto-objects -fuse-linker-plugin $src -o $output"]
1311         remote_file host delete $src
1312         remote_file host delete $output
1313         file delete $src
1314     }
1315     return $lto_fat_available_saved
1316 }
1317
1318 # Returns true if the target compiler supports LTO and -shared
1319 proc check_lto_shared_available { } {
1320     global lto_shared_available_saved
1321     global CC
1322
1323     if {![info exists lto_shared_available_saved]} {
1324         if { ![check_gcc_plugin_enabled] } {
1325             set lto_shared_available_saved 0
1326             return 0
1327         }
1328         # This test will hide LTO bugs in ld.  Since GCC 4.9 adds
1329         # -ffat-lto-objects, we always run LTO tests on Linux with
1330         # GCC 4.9 or newer.
1331         if { [istarget "*-*-linux*"] && [at_least_gcc_version 4 9] } {
1332             set lto_shared_available_saved 1
1333             return 1
1334         }
1335         # Check if gcc supports -flto -fuse-linker-plugin -shared
1336         set flags ""
1337         if [board_info [target_info name] exists cflags] {
1338             append flags " [board_info [target_info name] cflags]"
1339         }
1340         if [board_info [target_info name] exists ldflags] {
1341             append flags " [board_info [target_info name] ldflags]"
1342         }
1343
1344         set basename "tmpdir/lto_shared[pid]"
1345         set src ${basename}.c
1346         set output ${basename}.so
1347         set f [open $src "w"]
1348         puts $f ""
1349         close $f
1350         if [is_remote host] {
1351             set src [remote_download host $src]
1352         }
1353         set lto_shared_available_saved [run_host_cmd_yesno "$CC" "$flags -shared -fPIC -flto -fuse-linker-plugin $src -o $output"]
1354         remote_file host delete $src
1355         remote_file host delete $output
1356         file delete $src
1357     }
1358     return $lto_shared_available_saved
1359 }
1360
1361 # Check if the assembler supports CFI statements.
1362
1363 proc check_as_cfi { } {
1364     global check_as_cfi_result
1365     global as
1366     if [info exists check_as_cfi_result] {
1367         return $check_as_cfi_result
1368     }
1369     set as_file "tmpdir/check_as_cfi.s"
1370     set as_fh [open $as_file w 0666]
1371     puts $as_fh "# Generated file. DO NOT EDIT"
1372     puts $as_fh "\t.cfi_startproc"
1373     puts $as_fh "\t.cfi_endproc"
1374     close $as_fh
1375     remote_download host $as_file
1376     verbose -log "Checking CFI support:"
1377     rename "perror" "check_as_cfi_perror"
1378     proc perror { args } { }
1379     set success [ld_assemble $as $as_file "/dev/null"]
1380     rename "perror" ""
1381     rename "check_as_cfi_perror" "perror"
1382     #remote_file host delete $as_file
1383     set check_as_cfi_result $success
1384     return $success
1385 }
1386
1387 # Returns true if IFUNC works.
1388
1389 proc check_ifunc_available { } {
1390     global ifunc_available_saved
1391     global CC
1392
1393     if {![info exists ifunc_available_saved]} {
1394         if { ![check_compiler_available] } {
1395             set ifunc_available_saved 0
1396             return 0
1397         }
1398         # Check if gcc supports -flto -fuse-linker-plugin
1399         set flags ""
1400         if [board_info [target_info name] exists cflags] {
1401             append flags " [board_info [target_info name] cflags]"
1402         }
1403         if [board_info [target_info name] exists ldflags] {
1404             append flags " [board_info [target_info name] ldflags]"
1405         }
1406
1407         set basename "tmpdir/ifunc[pid]"
1408         set src ${basename}.c
1409         set output ${basename}.out
1410         set f [open $src "w"]
1411         puts $f "extern int library_func2 (void);"
1412         puts $f "int main (void)"
1413         puts $f "{"
1414         puts $f "  if (library_func2 () != 2) __builtin_abort ();"
1415         puts $f "  return 0; "
1416         puts $f "}"
1417         puts $f "static int library_func1 (void) {return 2; }"
1418         puts $f "void *foo (void) __asm__ (\"library_func2\");"
1419         puts $f "void *foo (void) { return library_func1; }"
1420         puts $f "__asm__(\".type library_func2, %gnu_indirect_function\");"
1421         close $f
1422         if [is_remote host] {
1423             set src [remote_download host $src]
1424         }
1425         set ifunc_available_saved [run_host_cmd_yesno "$CC" "$flags $src -o $output"]
1426         if { [isnative] && $ifunc_available_saved == 1 } {
1427           set ifunc_available_saved [run_host_cmd_yesno "$output" ""]
1428         }
1429         remote_file host delete $src
1430         remote_file host delete $output
1431         file delete $src
1432     }
1433     return $ifunc_available_saved
1434 }
1435
1436 # Returns true if ifunc attribute works.
1437
1438 proc check_ifunc_attribute_available { } {
1439     global ifunc_attribute_available_saved
1440     global CC
1441
1442     if {![info exists ifunc_attribute_available_saved]} {
1443         if { ![check_compiler_available] } {
1444             set ifunc_attribute_available_saved 0
1445             return 0
1446         }
1447         # Check if gcc supports -flto -fuse-linker-plugin
1448         set flags ""
1449         if [board_info [target_info name] exists cflags] {
1450             append flags " [board_info [target_info name] cflags]"
1451         }
1452         if [board_info [target_info name] exists ldflags] {
1453             append flags " [board_info [target_info name] ldflags]"
1454         }
1455
1456         set basename "tmpdir/ifunc[pid]"
1457         set src ${basename}.c
1458         set output ${basename}.out
1459         set f [open $src "w"]
1460         puts $f "extern int library_func2 (void) __attribute__ ((ifunc (\"foo\")));"
1461         puts $f "int main (void)"
1462         puts $f "{"
1463         puts $f "  if (library_func2 () != 2) __builtin_abort ();"
1464         puts $f "  return 0; "
1465         puts $f "}"
1466         puts $f "static int library_func1 (void) {return 2; }"
1467         puts $f "void *foo (void) { return library_func1; }"
1468         close $f
1469         if [is_remote host] {
1470             set src [remote_download host $src]
1471         }
1472         set ifunc_attribute_available_saved [run_host_cmd_yesno "$CC" "$flags $src -o $output"]
1473         if { [isnative] && $ifunc_attribute_available_saved == 1 } {
1474           set ifunc_attribute_available_saved [run_host_cmd_yesno "$output" ""]
1475         }
1476         remote_file host delete $src
1477         remote_file host delete $output
1478         file delete $src
1479     }
1480     return $ifunc_attribute_available_saved
1481 }
1482
1483 # Return true if libdl is supported.
1484
1485 proc check_libdl_available { } {
1486     global libdl_available_saved
1487     global CC
1488
1489     if {![info exists libdl_available_saved]} {
1490         if { ![check_compiler_available] } {
1491             set libdl_available_saved 0
1492             return 0
1493         }
1494
1495         set basename "tmpdir/dl_avail_test[pid]"
1496         set src ${basename}.c
1497         set output ${basename}.out
1498         set f [open $src "w"]
1499         # Sample test file.
1500         puts $f "#include <dlfcn.h>"
1501         puts $f "int main (void)"
1502         puts $f "{"
1503         puts $f "  dlopen (\"dummy.so\", RTLD_NOW);"
1504         puts $f "  return 0; "
1505         puts $f "}"
1506         close $f
1507         if [is_remote host] {
1508             set src [remote_download host $src]
1509         }
1510         set libdl_available_saved [run_host_cmd_yesno "$CC" "$src -o $output -ldl"]
1511         remote_file host delete $src
1512         remote_file host delete $output
1513         file delete $src
1514     }
1515     return $libdl_available_saved
1516 }
1517
1518 # Returns true if GNU2 TLS works.
1519
1520 proc check_gnu2_tls_available { } {
1521     global gnu2_tls_available_saved
1522     global CC
1523     global GNU2_CFLAGS
1524
1525     if {![info exists gnu2_tls_available_saved]} {
1526         if { ![check_compiler_available] || "$GNU2_CFLAGS" == "" } {
1527             set gnu2_tls_available_saved 0
1528             return 0
1529         }
1530         # Check if GNU2 TLS works.
1531         set flags "$GNU2_CFLAGS"
1532         if [board_info [target_info name] exists cflags] {
1533             append flags " [board_info [target_info name] cflags]"
1534         }
1535         if [board_info [target_info name] exists ldflags] {
1536             append flags " [board_info [target_info name] ldflags]"
1537         }
1538
1539         set basename "tmpdir/gnu2_tls[pid]"
1540         set src1 ${basename}1.c
1541         set output1 ${basename}.so
1542         set f [open $src1 "w"]
1543         puts $f "extern __thread int zzz;"
1544         puts $f "int foo (void)"
1545         puts $f "{"
1546         puts $f "  return zzz;"
1547         puts $f "}"
1548         close $f
1549         if [is_remote host] {
1550             set src1 [remote_download host $src1]
1551         }
1552         set src2 ${basename}2.c
1553         set output2 ${basename}.exe
1554         set f [open $src2 "w"]
1555         puts $f "__thread int zzz = 20;"
1556         puts $f "extern int foo (void);"
1557         puts $f "int main (void)"
1558         puts $f "{"
1559         puts $f "  if (foo () != 20) __builtin_abort ();"
1560         puts $f "  return 0; "
1561         puts $f "}"
1562         close $f
1563         if [is_remote host] {
1564             set src2 [remote_download host $src2]
1565         }
1566         set gnu2_tls_available_saved [run_host_cmd_yesno "$CC" "-fPIC -shared $flags $src1 -o $output1"]
1567         if { $gnu2_tls_available_saved == 1 } {
1568             set gnu2_tls_available_saved [run_host_cmd_yesno "$CC" "$flags $src2 $output1 -o $output2"]
1569             if { $gnu2_tls_available_saved == 1 } {
1570                 set gnu2_tls_available_saved [run_host_cmd_yesno "$output2" ""]
1571             }
1572         }
1573         remote_file host delete $src1
1574         remote_file host delete $output1
1575         remote_file host delete $src2
1576         remote_file host delete $output2
1577         file delete $src1 $src2
1578     }
1579     return $gnu2_tls_available_saved
1580 }