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 [file_contents $binfile.out]
 777                 verbose [file_contents $binfile.out] 2
 778                 if [regexp_diff "$binfile.out" "$srcdir/$subdir/$expfile"] {
 779                     set failed 1
 780                 }
 781             }
 782         }
 783
 784         if { $failed != 0 } {
 785             fail $testname
 786         } elseif ![isnative] {
 787             unsupported $testname
 788         } else {
 789             set errcnt 0
 790             pass $testname
 791         }
 792     }
 793 }
 794
 795 # List contains test-items with 3 items followed by 2 lists, one item and
 796 # one optional item:
 797 #  0:name
 798 #  1:ld or ar options
 799 #  2:compile options
 800 #  3:filenames of source files
 801 #  4:action and options.
 802 #  5:name of output file
 803 #  6:language (optional)
 804 #
 805 # Actions:
 806 # objdump: Apply objdump options on result.  Compare with regex (last arg).
 807 # nm: Apply nm options on result.  Compare with regex (last arg).
 808 # readelf: Apply readelf options on result.  Compare with regex (last arg).
 809 # warning: Check linker output against regex (last arg).
 810 # error: Like 'warning' but checking output in error case.
 811 # warning_output: Check linker output against regex in a file (last arg).
 812 # error_output: Like 'warning_output' but checking output in error case.
 813 #
 814 proc run_cc_link_tests { ldtests } {
 815     global nm
 816     global objdump
 817     global READELF
 818     global srcdir
 819     global subdir
 820     global env
 821     global CC
 822     global CXX
 823     global CFLAGS
 824     global CXXFLAGS
 825     global ar
 826     global exec_output
 827     global board_cflags
 828     global STATIC_LDFLAGS
 829
 830     if [board_info [target_info name] exists cflags] {
 831         set board_cflags " [board_info [target_info name] cflags]"
 832     } else {
 833         set board_cflags ""
 834     }
 835
 836     foreach testitem $ldtests {
 837         set testname [lindex $testitem 0]
 838         set ldflags [lindex $testitem 1]
 839         set cflags [lindex $testitem 2]
 840         set src_files  [lindex $testitem 3]
 841         set actions [lindex $testitem 4]
 842         set binfile tmpdir/[lindex $testitem 5]
 843         set lang [lindex $testitem 6]
 844         set objfiles {}
 845         set is_unresolved 0
 846         set failed 0
 847         set check_ld(terminal) 0
 848         set check_ld(source) ""
 849
 850         if { ![check_compiler_available] } {
 851             unsupported $testname
 852             continue
 853         }
 854
 855         #verbose -log "testname  is $testname"
 856         #verbose -log "ldflags   is $ldflags"
 857         #verbose -log "cflags    is $cflags"
 858         #verbose -log "src_files is $src_files"
 859         #verbose -log "actions   is $actions"
 860         #verbose -log "binfile   is $binfile"
 861         #verbose -log "lang      is $lang"
 862
 863         foreach actionlist $actions {
 864             set action [lindex $actionlist 0]
 865             set progopts [lindex $actionlist 1]
 866
 867             # Find actions related to error/warning processing.
 868             switch -- $action {
 869                 error
 870                 {
 871                     set check_ld(source) "regexp"
 872                     set check_ld(regexp) $progopts
 873                     set check_ld(terminal) 1
 874                 }
 875                 warning
 876                 {
 877                     set check_ld(source) "regexp"
 878                     set check_ld(regexp) $progopts
 879                 }
 880                 error_output
 881                 {
 882                     set check_ld(source) "file"
 883                     set check_ld(file) $progopts
 884                     set check_ld(terminal) 1
 885                 }
 886                 warning_output
 887                 {
 888                     set check_ld(source) "file"
 889                     set check_ld(file) $progopts
 890                 }
 891             }
 892         }
 893
 894         # Compile each file in the test.
 895         foreach src_file $src_files {
 896             set fileroot "[file rootname [file tail $src_file]]"
 897             set objfile "tmpdir/$fileroot.o"
 898             lappend objfiles $objfile
 899
 900             if { [ string match "c++" $lang ] } {
 901                 set cmd "$CXX -c $CXXFLAGS $cflags"
 902             } else {
 903                 set cmd "$CC -c $CFLAGS $cflags"
 904             }
 905             if ![ld_compile $cmd $srcdir/$subdir/$src_file $objfile] {
 906                 set failed 1
 907                 break
 908             }
 909         }
 910         if { $failed != 0 } {
 911             unresolved $testname
 912             continue
 913         }
 914
 915         # Clear error and warning counts.
 916         reset_vars
 917
 918         if { [ string match "c++" $lang ] } {
 919             set cc_cmd $CXX
 920         } else {
 921             set cc_cmd $CC
 922         }
 923
 924         if { $binfile eq "tmpdir/" } {
 925             # compile only
 926             set binfile $objfile
 927         } elseif { [regexp ".*\\.a$" $binfile] } {
 928             if { ![ar_simple_create $ar $ldflags $binfile "$objfiles"] } {
 929                 set failed 1
 930             }
 931         } else {
 932             if { [string match "" $STATIC_LDFLAGS] \
 933                  && [regexp -- ".* \[-\]+static .*" " $board_cflags $ldflags $objfiles "] } {
 934                 untested $testname
 935                 continue
 936             }
 937             ld_link $cc_cmd $binfile "$board_cflags -L$srcdir/$subdir $ldflags $objfiles"
 938             set ld_output "$exec_output"
 939
 940             if { $check_ld(source) == "regexp" } then {
 941                 # Match output against regexp argument.
 942                 verbose -log "returned with: <$ld_output>, expected: <$check_ld(regexp)>"
 943                 if { ![regexp $check_ld(regexp) $ld_output] } then {
 944                     set failed 1
 945                 }
 946             } elseif { $check_ld(source) == "file" } then {
 947                 # Match output against patterns in a file.
 948                 set_file_contents "tmpdir/ld.messages" "$ld_output"
 949                 verbose "ld.messages has '[file_contents tmpdir/ld.messages]'"
 950                 if { [regexp_diff "tmpdir/ld.messages" "$srcdir/$subdir/$check_ld(file)"] } then {
 951                     verbose "output is $ld_output" 2
 952                     set failed 1
 953                 }
 954             }
 955
 956             if { $check_ld(source) != "" } then {
 957                 if { $ld_output == "" } then {
 958                     verbose -log "Linker was expected to give error or warning"
 959                     set failed 1
 960                 }
 961             } else {
 962                 if { $ld_output != "" } then {
 963                     verbose -log "Unexpected linker warning or error"
 964                     set failed 1
 965                 }
 966             }
 967         }
 968
 969         if { $failed == 0 } {
 970             foreach actionlist $actions {
 971                 set action [lindex $actionlist 0]
 972                 set progopts [lindex $actionlist 1]
 973
 974                 # There are actions where we run regexp_diff on the
 975                 # output, and there are other actions (presumably).
 976                 # Handling of the former look the same.
 977                 set dump_prog ""
 978                 switch -- $action {
 979                     objdump
 980                         { set dump_prog $objdump }
 981                     nm
 982                         { set dump_prog $nm }
 983                     readelf
 984                         { set dump_prog $READELF }
 985                     error {}
 986                     warning {}
 987                     error_output {}
 988                     warning_output {}
 989                     default
 990                         {
 991                             perror "Unrecognized action $action"
 992                             set is_unresolved 1
 993                             break
 994                         }
 995                     }
 996
 997                 if { $dump_prog != "" } {
 998                     set dumpfile [lindex $actionlist 2]
 999                     set binary $dump_prog
1000
1001                     # Ensure consistent sorting of symbols
1002                     if {[info exists env(LC_ALL)]} {
1003                         set old_lc_all $env(LC_ALL)
1004                     }
1005                     set env(LC_ALL) "C"
1006                     set cmd "$binary $progopts $binfile > dump.out"
1007                     send_log "$cmd\n"
1008                     catch "exec $cmd" comp_output
1009                     if {[info exists old_lc_all]} {
1010                         set env(LC_ALL) $old_lc_all
1011                     } else {
1012                         unset env(LC_ALL)
1013                     }
1014                     set comp_output [prune_warnings $comp_output]
1015
1016                     if ![string match "" $comp_output] then {
1017                         send_log "$comp_output\n"
1018                         set failed 1
1019                         break
1020                     }
1021
1022                     if { [regexp_diff "dump.out" "$srcdir/$subdir/$dumpfile"] } then {
1023                         verbose "output is [file_contents "dump.out"]" 2
1024                         set failed 1
1025                         break
1026                     }
1027                 }
1028             }
1029         }
1030
1031         if { $failed } {
1032             fail $testname
1033         } elseif { $is_unresolved } {
1034             unresolved $testname
1035         } else {
1036             pass $testname
1037         }
1038     }
1039 }
1040
1041 # Returns true if --gc-sections is supported on the target.
1042
1043 proc check_gc_sections_available { } {
1044     global gc_sections_available_saved
1045     global ld
1046
1047     if {![info exists gc_sections_available_saved]} {
1048         # Some targets don't support gc-sections despite whatever's
1049         # advertised by ld's options.
1050         if {   [istarget alpha-*-*]
1051             || [istarget bpf-*-*]
1052             || [istarget d30v-*-*]
1053             || [istarget dlx-*-*]
1054             || [istarget hppa*64-*-*]
1055             || [istarget ia64-*-*]
1056             || [istarget mep-*-*]
1057             || [istarget mn10200-*-*]
1058             || [istarget pj*-*-*]
1059             || [istarget pru*-*-*]
1060             || [istarget s12z-*-*]
1061             || [istarget xgate-*-*]
1062             || [istarget z80-*-*] } {
1063             set gc_sections_available_saved 0
1064             return 0
1065         }
1066
1067         # elf2flt uses -q (--emit-relocs), which is incompatible with
1068         # --gc-sections.
1069         if { [board_info target exists ldflags]
1070              && [regexp " -elf2flt\[ =\]" " [board_info target ldflags] "] } {
1071             set gc_sections_available_saved 0
1072             return 0
1073         }
1074
1075         # Check if the ld used by gcc supports --gc-sections.
1076         # FIXME: this test is useless since ld --help always says
1077         # --gc-sections is available
1078         set ld_output [remote_exec host $ld "--help"]
1079         if { [ string first "--gc-sections" $ld_output ] >= 0 } {
1080             set gc_sections_available_saved 1
1081         } else {
1082             set gc_sections_available_saved 0
1083         }
1084     }
1085     return $gc_sections_available_saved
1086 }
1087
1088 # Return true if target uses genelf.em.
1089 proc uses_genelf { } {
1090     if { [istarget "d30v-*-*"]
1091          || [istarget "dlx-*-*"]
1092          || [istarget "fr30-*-*"]
1093          || ([istarget "frv-*-*"] && ![istarget "frv-*-linux*"])
1094          || [istarget "ft32-*-*"]
1095          || [istarget "iq2000-*-*"]
1096          || [istarget "mn10200-*-*"]
1097          || [istarget "msp430-*-*"]
1098          || [istarget "mt-*-*"]
1099          || [istarget "pj*-*-*"]
1100          || [istarget "s12z-*-*"]
1101          || [istarget "xgate-*-*"] } {
1102         return 1
1103     }
1104     return 0
1105 }
1106
1107 proc is_underscore_target { } {
1108     global is_underscore_target_saved
1109     global target_triplet
1110     global srcdir
1111
1112     if { ![info exists is_underscore_target_saved] } {
1113         set cmd "targ=$target_triplet . $srcdir/../../bfd/config.bfd &&"
1114         append cmd { echo "$targ_underscore"}
1115         verbose -log "$cmd"
1116         set status [catch {exec sh -c $cmd} result]
1117         if { $status == 0 && [string match "yes" $result] } {
1118             set is_underscore_target_saved 1
1119         } else {
1120             set is_underscore_target_saved 0
1121         }
1122     }
1123     return $is_underscore_target_saved
1124 }
1125
1126 # Returns true if the target ld supports the plugin API.
1127 proc check_plugin_api_available { } {
1128     global plugin_api_available_saved
1129     global ld
1130     if {![info exists plugin_api_available_saved]} {
1131         # Check if the ld used by gcc supports --plugin.
1132         set ld_output [remote_exec host $ld "--help"]
1133         if { [regexp -- "-plugin PLUGIN \[^\n\r\]*" $ld_output line]
1134              && ![regexp "ignored" $line] } {
1135             set plugin_api_available_saved 1
1136         } else {
1137             set plugin_api_available_saved 0
1138         }
1139     }
1140     return $plugin_api_available_saved
1141 }
1142
1143 # Sets ld_sysroot to the current sysroot (empty if not supported) and
1144 # returns true if the target ld supports sysroot.
1145 proc check_sysroot_available { } {
1146     global ld_sysroot_available_saved ld ld_sysroot
1147     if {![info exists ld_sysroot_available_saved]} {
1148         # Check if ld supports --sysroot *other* than empty.
1149         set ld_sysroot [string trimright [lindex [remote_exec host $ld "--print-sysroot"] 1]]
1150         if { $ld_sysroot == "" } {
1151             set ld_sysroot_available_saved 0
1152         } else {
1153             set ld_sysroot_available_saved 1
1154         }
1155     }
1156     return $ld_sysroot_available_saved
1157 }
1158
1159 # Return true if we can build a program with the compiler.
1160 # On some targets, CC might be defined, but libraries and startup
1161 # code might be missing or require special options that the ld test
1162 # harness doesn't know about.
1163
1164 proc check_compiler_available { } {
1165     global compiler_available_saved
1166     global CC
1167
1168     if {![info exists compiler_available_saved]} {
1169         if { [which $CC] == 0 } {
1170             set compiler_available_saved 0
1171             return 0
1172         }
1173
1174         set flags ""
1175         if [board_info [target_info name] exists cflags] {
1176             append flags " [board_info [target_info name] cflags]"
1177         }
1178         if [board_info [target_info name] exists ldflags] {
1179             append flags " [board_info [target_info name] ldflags]"
1180         }
1181
1182         set basename "tmpdir/compiler[pid]"
1183         set src ${basename}.c
1184         set output ${basename}.out
1185         set f [open $src "w"]
1186         puts $f "int main (void)"
1187         puts $f "{"
1188         puts $f "  return 0; "
1189         puts $f "}"
1190         close $f
1191         if [is_remote host] {
1192             set src [remote_download host $src]
1193         }
1194         set compiler_available_saved [run_host_cmd_yesno "$CC" "$flags $src -o $output"]
1195         remote_file host delete $src
1196         remote_file host delete $output
1197         file delete $src
1198     }
1199     return $compiler_available_saved
1200 }
1201
1202 # Returns 1 if plugin is enabled in gcc.  Returns 0 otherwise.
1203 proc check_gcc_plugin_enabled { } {
1204     global CC
1205
1206     if {![info exists CC]} {
1207         set CC [find_gcc]
1208     }
1209     if { $CC == ""} {
1210         return 0
1211     }
1212     set state [remote_exec host $CC -v]
1213     if { [lindex $state 0] != 0 } {
1214         return 0;
1215     }
1216     for { set i 1 } { $i < [llength $state] } { incr i } {
1217         set v [lindex $state $i]
1218         if { [ string match "*--disable-plugin*" $v ] } {
1219             verbose "plugin is disabled by $v"
1220             return 0;
1221         }
1222     }
1223
1224     return 1;
1225 }
1226
1227 # Returns true if the target compiler supports LTO
1228 proc check_lto_available { } {
1229     global lto_available_saved
1230     global CC
1231
1232     if {![info exists lto_available_saved]} {
1233         if { ![check_gcc_plugin_enabled] } {
1234             set lto_available_saved 0
1235             return 0
1236         }
1237         # This test will hide LTO bugs in ld.  Since GCC 4.9 adds
1238         # -ffat-lto-objects, we always run LTO tests on Linux with
1239         # GCC 4.9 or newer.
1240         if { [istarget "*-*-linux*"] && [at_least_gcc_version 4 9] } {
1241             set lto_available_saved 1
1242             return 1
1243         }
1244         # Check if gcc supports -flto -fuse-linker-plugin
1245         set flags ""
1246         if [board_info [target_info name] exists cflags] {
1247             append flags " [board_info [target_info name] cflags]"
1248         }
1249         if [board_info [target_info name] exists ldflags] {
1250             append flags " [board_info [target_info name] ldflags]"
1251         }
1252
1253         set basename "tmpdir/lto[pid]"
1254         set src ${basename}.c
1255         set output ${basename}.out
1256         set f [open $src "w"]
1257         puts $f "int main() { return 0; }"
1258         close $f
1259         if [is_remote host] {
1260             set src [remote_download host $src]
1261         }
1262         set lto_available_saved [run_host_cmd_yesno "$CC" "$flags -flto -fuse-linker-plugin $src -o $output"]
1263         remote_file host delete $src
1264         remote_file host delete $output
1265         file delete $src
1266     }
1267     return $lto_available_saved
1268 }
1269
1270 # Returns true if the target compiler supports LTO  -ffat-lto-objects
1271 proc check_lto_fat_available { } {
1272     global lto_fat_available_saved
1273     global CC
1274
1275     if {![info exists lto_fat_available_saved]} {
1276         if { ![check_gcc_plugin_enabled] } {
1277             set lto_fat_available_saved 0
1278             return 0
1279         }
1280         # This test will hide LTO bugs in ld.  Since GCC 4.9 adds
1281         # -ffat-lto-objects, we always run LTO tests on Linux with
1282         # GCC 4.9 or newer.
1283         if { [istarget "*-*-linux*"] && [at_least_gcc_version 4 9] } {
1284             set lto_fat_available_saved 1
1285             return 1
1286         }
1287         # Check if gcc supports -flto -fuse-linker-plugin
1288         set flags ""
1289         if [board_info [target_info name] exists cflags] {
1290             append flags " [board_info [target_info name] cflags]"
1291         }
1292         if [board_info [target_info name] exists ldflags] {
1293             append flags " [board_info [target_info name] ldflags]"
1294         }
1295
1296         set basename "tmpdir/lto[pid]"
1297         set src ${basename}.c
1298         set output ${basename}.out
1299         set f [open $src "w"]
1300         puts $f "int main() { return 0; }"
1301         close $f
1302         if [is_remote host] {
1303             set src [remote_download host $src]
1304         }
1305         set lto_fat_available_saved [run_host_cmd_yesno "$CC" "$flags -flto -ffat-lto-objects -fuse-linker-plugin $src -o $output"]
1306         remote_file host delete $src
1307         remote_file host delete $output
1308         file delete $src
1309     }
1310     return $lto_fat_available_saved
1311 }
1312
1313 # Returns true if the target compiler supports LTO and -shared
1314 proc check_lto_shared_available { } {
1315     global lto_shared_available_saved
1316     global CC
1317
1318     if {![info exists lto_shared_available_saved]} {
1319         if { ![check_gcc_plugin_enabled] } {
1320             set lto_shared_available_saved 0
1321             return 0
1322         }
1323         # This test will hide LTO bugs in ld.  Since GCC 4.9 adds
1324         # -ffat-lto-objects, we always run LTO tests on Linux with
1325         # GCC 4.9 or newer.
1326         if { [istarget "*-*-linux*"] && [at_least_gcc_version 4 9] } {
1327             set lto_shared_available_saved 1
1328             return 1
1329         }
1330         # Check if gcc supports -flto -fuse-linker-plugin -shared
1331         set flags ""
1332         if [board_info [target_info name] exists cflags] {
1333             append flags " [board_info [target_info name] cflags]"
1334         }
1335         if [board_info [target_info name] exists ldflags] {
1336             append flags " [board_info [target_info name] ldflags]"
1337         }
1338
1339         set basename "tmpdir/lto_shared[pid]"
1340         set src ${basename}.c
1341         set output ${basename}.so
1342         set f [open $src "w"]
1343         puts $f ""
1344         close $f
1345         if [is_remote host] {
1346             set src [remote_download host $src]
1347         }
1348         set lto_shared_available_saved [run_host_cmd_yesno "$CC" "$flags -shared -fPIC -flto -fuse-linker-plugin $src -o $output"]
1349         remote_file host delete $src
1350         remote_file host delete $output
1351         file delete $src
1352     }
1353     return $lto_shared_available_saved
1354 }
1355
1356 # Check if the assembler supports CFI statements.
1357
1358 proc check_as_cfi { } {
1359     global check_as_cfi_result
1360     global as
1361     if [info exists check_as_cfi_result] {
1362         return $check_as_cfi_result
1363     }
1364     set as_file "tmpdir/check_as_cfi.s"
1365     set as_fh [open $as_file w 0666]
1366     puts $as_fh "# Generated file. DO NOT EDIT"
1367     puts $as_fh "\t.cfi_startproc"
1368     puts $as_fh "\t.cfi_endproc"
1369     close $as_fh
1370     remote_download host $as_file
1371     verbose -log "Checking CFI support:"
1372     rename "perror" "check_as_cfi_perror"
1373     proc perror { args } { }
1374     set success [ld_assemble $as $as_file "/dev/null"]
1375     rename "perror" ""
1376     rename "check_as_cfi_perror" "perror"
1377     #remote_file host delete $as_file
1378     set check_as_cfi_result $success
1379     return $success
1380 }
1381
1382 # Returns true if IFUNC works.
1383
1384 proc check_ifunc_available { } {
1385     global ifunc_available_saved
1386     global CC
1387
1388     if {![info exists ifunc_available_saved]} {
1389         if { ![check_compiler_available] } {
1390             set ifunc_available_saved 0
1391             return 0
1392         }
1393         # Check if gcc supports -flto -fuse-linker-plugin
1394         set flags ""
1395         if [board_info [target_info name] exists cflags] {
1396             append flags " [board_info [target_info name] cflags]"
1397         }
1398         if [board_info [target_info name] exists ldflags] {
1399             append flags " [board_info [target_info name] ldflags]"
1400         }
1401
1402         set basename "tmpdir/ifunc[pid]"
1403         set src ${basename}.c
1404         set output ${basename}.out
1405         set f [open $src "w"]
1406         puts $f "extern int library_func2 (void);"
1407         puts $f "int main (void)"
1408         puts $f "{"
1409         puts $f "  if (library_func2 () != 2) __builtin_abort ();"
1410         puts $f "  return 0; "
1411         puts $f "}"
1412         puts $f "static int library_func1 (void) {return 2; }"
1413         puts $f "void *foo (void) __asm__ (\"library_func2\");"
1414         puts $f "void *foo (void) { return library_func1; }"
1415         puts $f "__asm__(\".type library_func2, %gnu_indirect_function\");"
1416         close $f
1417         if [is_remote host] {
1418             set src [remote_download host $src]
1419         }
1420         set ifunc_available_saved [run_host_cmd_yesno "$CC" "$flags $src -o $output"]
1421         if { [isnative] && $ifunc_available_saved == 1 } {
1422           set ifunc_available_saved [run_host_cmd_yesno "$output" ""]
1423         }
1424         remote_file host delete $src
1425         remote_file host delete $output
1426         file delete $src
1427     }
1428     return $ifunc_available_saved
1429 }
1430
1431 # Returns true if ifunc attribute works.
1432
1433 proc check_ifunc_attribute_available { } {
1434     global ifunc_attribute_available_saved
1435     global CC
1436
1437     if {![info exists ifunc_attribute_available_saved]} {
1438         if { ![check_compiler_available] } {
1439             set ifunc_attribute_available_saved 0
1440             return 0
1441         }
1442         # Check if gcc supports -flto -fuse-linker-plugin
1443         set flags ""
1444         if [board_info [target_info name] exists cflags] {
1445             append flags " [board_info [target_info name] cflags]"
1446         }
1447         if [board_info [target_info name] exists ldflags] {
1448             append flags " [board_info [target_info name] ldflags]"
1449         }
1450
1451         set basename "tmpdir/ifunc[pid]"
1452         set src ${basename}.c
1453         set output ${basename}.out
1454         set f [open $src "w"]
1455         puts $f "extern int library_func2 (void) __attribute__ ((ifunc (\"foo\")));"
1456         puts $f "int main (void)"
1457         puts $f "{"
1458         puts $f "  if (library_func2 () != 2) __builtin_abort ();"
1459         puts $f "  return 0; "
1460         puts $f "}"
1461         puts $f "static int library_func1 (void) {return 2; }"
1462         puts $f "void *foo (void) { return library_func1; }"
1463         close $f
1464         if [is_remote host] {
1465             set src [remote_download host $src]
1466         }
1467         set ifunc_attribute_available_saved [run_host_cmd_yesno "$CC" "$flags $src -o $output"]
1468         if { [isnative] && $ifunc_attribute_available_saved == 1 } {
1469           set ifunc_attribute_available_saved [run_host_cmd_yesno "$output" ""]
1470         }
1471         remote_file host delete $src
1472         remote_file host delete $output
1473         file delete $src
1474     }
1475     return $ifunc_attribute_available_saved
1476 }
1477
1478 # Return true if libdl is supported.
1479
1480 proc check_libdl_available { } {
1481     global libdl_available_saved
1482     global CC
1483
1484     if {![info exists libdl_available_saved]} {
1485         if { ![check_compiler_available] } {
1486             set libdl_available_saved 0
1487             return 0
1488         }
1489
1490         set basename "tmpdir/dl_avail_test[pid]"
1491         set src ${basename}.c
1492         set output ${basename}.out
1493         set f [open $src "w"]
1494         # Sample test file.
1495         puts $f "#include <dlfcn.h>"
1496         puts $f "int main (void)"
1497         puts $f "{"
1498         puts $f "  dlopen (\"dummy.so\", RTLD_NOW);"
1499         puts $f "  return 0; "
1500         puts $f "}"
1501         close $f
1502         if [is_remote host] {
1503             set src [remote_download host $src]
1504         }
1505         set libdl_available_saved [run_host_cmd_yesno "$CC" "$src -o $output -ldl"]
1506         remote_file host delete $src
1507         remote_file host delete $output
1508         file delete $src
1509     }
1510     return $libdl_available_saved
1511 }
1512
1513 # Returns true if GNU2 TLS works.
1514
1515 proc check_gnu2_tls_available { } {
1516     global gnu2_tls_available_saved
1517     global CC
1518     global GNU2_CFLAGS
1519
1520     if {![info exists gnu2_tls_available_saved]} {
1521         if { ![check_compiler_available] || "$GNU2_CFLAGS" == "" } {
1522             set gnu2_tls_available_saved 0
1523             return 0
1524         }
1525         # Check if GNU2 TLS works.
1526         set flags "$GNU2_CFLAGS"
1527         if [board_info [target_info name] exists cflags] {
1528             append flags " [board_info [target_info name] cflags]"
1529         }
1530         if [board_info [target_info name] exists ldflags] {
1531             append flags " [board_info [target_info name] ldflags]"
1532         }
1533
1534         set basename "tmpdir/gnu2_tls[pid]"
1535         set src1 ${basename}1.c
1536         set output1 ${basename}.so
1537         set f [open $src1 "w"]
1538         puts $f "extern __thread int zzz;"
1539         puts $f "int foo (void)"
1540         puts $f "{"
1541         puts $f "  return zzz;"
1542         puts $f "}"
1543         close $f
1544         if [is_remote host] {
1545             set src1 [remote_download host $src1]
1546         }
1547         set src2 ${basename}2.c
1548         set output2 ${basename}.exe
1549         set f [open $src2 "w"]
1550         puts $f "__thread int zzz = 20;"
1551         puts $f "extern int foo (void);"
1552         puts $f "int main (void)"
1553         puts $f "{"
1554         puts $f "  if (foo () != 20) __builtin_abort ();"
1555         puts $f "  return 0; "
1556         puts $f "}"
1557         close $f
1558         if [is_remote host] {
1559             set src2 [remote_download host $src2]
1560         }
1561         set gnu2_tls_available_saved [run_host_cmd_yesno "$CC" "-fPIC -shared $flags $src1 -o $output1"]
1562         if { $gnu2_tls_available_saved == 1 } {
1563             set gnu2_tls_available_saved [run_host_cmd_yesno "$CC" "$flags $src2 $output1 -o $output2"]
1564             if { $gnu2_tls_available_saved == 1 } {
1565                 set gnu2_tls_available_saved [run_host_cmd_yesno "$output2" ""]
1566             }
1567         }
1568         remote_file host delete $src1
1569         remote_file host delete $output1
1570         remote_file host delete $src2
1571         remote_file host delete $output2
1572         file delete $src1 $src2
1573     }
1574     return $gnu2_tls_available_saved
1575 }