As pointed out in PR binutils/19020, those tests were still failing when doing
remote testing. This is because the binary files weren't being copied over to
the remote host for testing.
FAIL: binutils-all/pr19020a
FAIL: binutils-all/pr19020b
This small patch fixes this up to make things pass.
binutils/ChangeLog:
2016-10-14 Luis Machado <lgustavo@codesourcery.com>
* testsuite/lib/utils-lib.exp (run_dump_test): Call remote_download
to copy file to remote host.
Some MIPS targets use a named section symbol rather than a symbol with
no name as is used with most ELF targets. When renaming sections, the
named section symbol needs to be renamed too.
Rather than fix this bug, I'd originally intended to just correct the
xfail added recently for update-1.o vs update4.o in update-section.exp,
using the same set of targets for the localize-hidden-1 mips xfail.
I'd extracted that target test into a new function, is_bad_symtab. It
turns out to be useful in readelf.exp too.
bfd/
* config.bfd: Delete mips vxworks patterns matched earlier.
Combine mips*-*-none with mips*-*-elf*.
binutils/
* objcopy.c (find_section_rename): Forward declare. Remove
ibfd and sec_ptr param. Add old_name param. Allow for NULL
returned_flags. Move read of section name and flags to..
(setup_section): ..here. Update find_section_rename call.
(filter_symbols): Rename section symbols for renamed sections.
(copy_object): Call filter_symbols when renamed sections.
* testsuite/lib/binutils-common.exp (is_bad_symtab): New.
* testsuite/binutils-all/update-section.exp: Revert 96037eb0
mips xfail.
* testsuite/binutils-all/objcopy.exp (copy_executable): Use
is_bad_symtab.
(localize-hidden-1): xfail if is_bad_symtab.
* testsuite/binutils-all/readelf.exp: Use is_bad_symtab to select
between mips/tmips.
* testsuite/binutils-all/ar.exp: Skip tests for Alpha target.
Skip bfdtest1 tests for tic30 target.
* testsuite/binutils-all/arm/objdump.exp: Skip for aout arm
target.
* testsuite/binutils-all/compress.exp: Expect some tests to fail
on the nds32.
* testsuite/binutils-all/copy-3.d: Skip for go32 targets.
* testsuite/binutils-all/copy-4.d: Skip for AIX and linuxecoff
targets.
* testsuite/binutils-all/nm.exp: Treat beos based targets as ELF
targets.
* testsuite/binutils-all/objcopy.exp: Only run reverse bytes tests
if the bintest.o file was created. Use the
get_standard_section_names proc to get the name of the data
section.
* testsuite/binutils-all/objdump.exp: Update regexps to allow for
RX section names.
* testsuite/binutils-all/readelf.exp: Use
get_standard_section_names proc to get the name of the data
section.
* testsuite/binutils-all/readelf.r: Allow for non standard text
section names.
* testsuite/binutils-all/readelf.s: Update regexps for tilepro.
* testsuite/binutils-all/size.exp: Allow for non standard section
names.
* testsuite/binutils-all/update-section.exp: Expect comapre 1vs4
to fail on mips targets.
* testsuite/lib/utils-lib.exp (default_binutils_run): Use
get_standard_section_names proc.
(run_dump_test): Likewise.
(proc get_standard_section_names): New proc.
binutils* testsuite/lib/binutils-common.exp (is_elf_format): Add avr-*-*.
ld * testsuite/ld-elf/pr18735.d: Allow other symbols.
* testsuite/ld-elf/sec64k.exp: Skip 64ksec for avr.
* testsuite/ld-gc/pr14265.d: Allow other symbols.
* testsuite/ld-plugin/plugin.exp: Add PR ld/17973 to
plugin_tests only if check_shared_lib_support is true.
* testsuite/ld-selective/selective.exp: Add --section-start
flag for avr.
Oddly, config.sub converts a duple ending in -elf for these target to
-unknown-none, which means they aren't seen as elf targets by
binutils. So, counter that. This exposes a number of testsuite
issues (ones you would have seen if configuring with a full triple,
say m68hc11-unknown-elf).
binutils/
* testsuite/lib/binutils-common.exp (is_elf_format): Return true
for m68hc11/12 and xgate triples.
gas/
* testsuite/gas/cfi/cfi.exp: Exclude m68hc11/12 from m68k test.
ld/
* testsuite/lib/ld-lib.exp (check_shared_lib_support): Exclude xgate.
* testsuite/ld-elf/endsym.d: xfail m68hc11/12 and xgate.
* testsuite/ld-elf/pr14156a.d: Likewise.
* testsuite/ld-elf/pr14926.d: Don't run for m68hc11/12 and xgate.
* testsuite/ld-elf/sec64k.exp: Likewise.
We can't use the output section size to copy input section since
--interleave will shrink the output section. Instead, we change
bfd_convert_section_contents to return the updated input section
size. When we do that, we don't need to adjust the output section
size to skip gap fills.
bfd/
PR binutils/19020
* bfd.c (bfd_convert_section_contents): Add ptr_size parameter.
* bfd-in2.h: Regenerated.
binutils/
PR binutils/19020
* objcopy.c (copy_object): Don't adjust the output section size
when copying from input sections.
(copy_section): Use input section size for the copy. Get the
updated section size from bfd_convert_section_contents.
binutils/testsuite/
PR binutils/19020
* binutils-all/objcopy.exp: Run pr19020a and pr19020b.
* lib/utils-lib.exp (run_dump_test): Support binary input.
* binutils-all/pr19020.in: New file.
* binutils-all/pr19020a.d: Likewise.
* binutils-all/pr19020b.d: Likewise.
* lib/utils-lib.exp (run_dump_test): Document DUMPPROG, readelf
and size parameters. Alpha-sort switch tables. Include
addr2line, and size in list of possible auto-detected dump
programs.
FreeBSD has used ELF for all targets for more than 15 years. Add
*-*-freebsd* except i?86-*-freebsd\[12\].* to is_elf_format. Update
is_aout_format to include a trailing dot, so that it does not match
freebsd-10.0 and later.
Mixing target and not-target directives can be used to run for x86_64-*-*
target while skipping x86_64-*-gnux32 target. This patch allows mixing
target and not-target directives. It is used to skip elfedit-1 for
x86_64-*-gnux32.
* binutils-all/elfedit-1.d: Skip x86_64-*-gnux32.
* lib/utils-lib.exp (run_dump_test): Allow mixing target and
not-target directives.
* config.bfd: Replace alpha*-*-linuxecoff* pattern with
alpha*-*-linux*ecoff*.
binutils/testsuite/
* lib/binutils-common.exp (is_elf_format): Also exclude
*-*-linux*ecoff*.
gas/
* configure.tgt: Replace alpha*-*-linuxecoff* pattern with
alpha*-*-linux*ecoff*.
ld/
* configure.tgt: Replace alpha*-*-linuxecoff* pattern with
alpha*-*-linux*ecoff*. Update the `sed' pattern used to convert
from alpha*-*-linux-* to alpha*-*-linux*ecoff*.
* lib/binutils-common.exp (is_zlib_supported): New function.
* lib/utils-lib.exp (run_dump_test): If as options include
--compress-debug-sections and zlib is not available, report
the test as unsupported.
* binutils-all/compress.exp: Bail out if zlib is not available.
* binutils-all/objdump.exp (objdump compressed debug):
Mark unsupported if zlib is not available.
* binutils-all/readelf.exp (readelf_compressed_wa_test): Likewise.
gas/testsuite/
* lib/gas-defs.exp (run_dump_test): If as options include
--compress-debug-sections and zlib is not available, report
the test as unsupported.
ld/testsuite/
* ld-elf/compress.exp: Bail out if zlib is not supported.
* lib/ld-lib.exp (run_dump_test): If as options include
--compress-debug-sections and zlib is not available, report
the test as unsupported.
* nm.c (filter_symbols): Treat unique symbols as global symbols.
* doc/binutils.texi (nm): Mention that some lowercase letters
actually indicate global symbols.
* lib/utils-lib.exp (run_dump_test): Allow nm as a program.
* binutils-all/nm.exp: Test running "nm -g" on an object file
containing a unique symbol.
* tic6x.h (R_C6000_JUMP_SPLOT, R_C6000_EHTYPE,
R_C6000_PCR_H16, R_C6000_PCR_L16): New relocs.
(SHN_TIC6X_SCOMMON): Define.
bfd/
* elf32-tic6x.h (struct elf32_tic6x_params): New.
(elf32_tic6x_setup): Declare.
* elf32-tic6x.c: Include <limits.h>.
(ELF_DYNAMIC_LINKER, DEFAULT_STACK_SIZE, PLT_ENTRY_SIZE): Define.
(struct elf32_tic6x_link_hash_table, struct elf32_link_hash_entry):
New structures.
(elf32_tic6x_link_hash_table, is_tic6x_elf): New macros.
(tic6x_elf_scom_section, tic6x_elf_scom_symbol,
tic6x_elf_scom_symbol_ptr): New static variables.
(elf32_tic6x_howto_table, elf32_tic6x_howto_table_rel,
elf32_tic6x_reloc_map): Add R_C6000_JUMP_SLOT, R_C6000_EHTYPE,
R_C6000_PCR_H16 and R_C6000_PCR_L16.
(elf32_tic6x_link_hash_newfunc, elf32_tic6x_link_hash_table_create,
elf32_tic6x_link_hash_table_free, elf32_tic6x_setup,
elf32_tic6x_using_dsbt, elf32_tic6x_install_rela,
elf32_tic6x_create_dynamic_sections, elf32_tic6x_make_got_dynreloc,
elf32_tic6x_finish_dynamic_symbol, elf32_tic6x_gc_sweep_hook,
elf32_tic6x_adjust_dynamic_symbol): New static functions.
(elf32_tic6x_relocate_section): For R_C6000_PCR_S21, convert branches
to weak symbols as required by the ABI.
Handle GOT and DSBT_INDEX relocs, and copy relocs to the output file
as needed when generating DSBT output.
(elf32_tic6x_check_relocs, elf32_tic6x_add_symbol_hook,
elf32_tic6x_symbol_processing, elf32_tic6x_section_from_bfd_section,
elf32_tic6x_allocate_dynrelocs, elf32_tic6x_size_dynamic_sections,
elf32_tic6x_always_size_sections, elf32_tic6x_modify_program_headers,
elf32_tic6x_finish_dynamic_sections, elf32_tic6x_plt_sym_val,
elf32_tic6x_copy_private_data, elf32_tic6x_link_omit_section_dynsym):
New static functions.
(ELF_MAXPAGESIZE): Define to 0x1000.
(bfd_elf32_bfd_copy_private_bfd_data,
bfd_elf32_bfd_link_hash_table_create,
bfd_elf32_bfd_link_hash_table_free, elf_backend_can_refcount,
elf_backend_want_got_plt, elf_backend_want_dynbss,
elf_backend_plt_readonly, elf_backend_got_header_size,
elf_backend_gc_sweep_hook, elf_backend_modify_program_headers,
elf_backend_create_dynamic_sections, elf_backend_adjust_dynamic_symbol,
elf_backend_check_relocs, elf_backend_add_symbol_hook,
elf_backend_symbol_processing, elf_backend_link_output_symbol_hook,
elf_backend_section_from_bfd_section,
elf_backend_finish_dynamic_symbol, elf_backend_always_size_sections,
elf32_tic6x_size_dynamic_sections, elf_backend_finish_dynamic_sections,
elf_backend_omit_section_dynsym, elf_backend_plt_sym_val): Define.
* bfd/reloc.c (BFD_RELOC_C6000_JUMP_SLOT, BFD_RELOC_C6000_EHTYPE,
BFD_RELOC_C6000_PCR_H16, BFD_RELOC_C6000_PCR_S16): Add.
* bfd/bfd-in2.h: Regenerate.
* bfd/libbfd.h: Regenerate.
* config.bfd: Accept tic6x-*-* instead of tic6x-*-elf.
gas/
* config/tc-tic6x.c (sbss_section, scom_section, scom_symbol): New
static variables.
(md_begin): Initialize them.
(s_tic6x_scomm): New static function.
(md_pseudo_table): Add "scomm".
(tc_gen_reloc): Really undo all adjustments made by
bfd_install_relocation.
* doc/c-tic6x.texi: Document the .scomm directive.
gas/testsuite/
* gas/tic6x/scomm-directive-1.s: New test.
* gas/tic6x/scomm-directive-1.d: New test.
* gas/tic6x/scomm-directive-2.s: New test.
* gas/tic6x/scomm-directive-2.d: New test.
* gas/tic6x/scomm-directive-3.s: New test.
* gas/tic6x/scomm-directive-3.d: New test.
* gas/tic6x/scomm-directive-4.s: New test.
* gas/tic6x/scomm-directive-4.d: New test.
* gas/tic6x/scomm-directive-5.s: New test.
* gas/tic6x/scomm-directive-5.d: New test.
* gas/tic6x/scomm-directive-6.s: New test.
* gas/tic6x/scomm-directive-6.d: New test.
* gas/tic6x/scomm-directive-7.s: New test.
* gas/tic6x/scomm-directive-7.d: New test.
* gas/tic6x/scomm-directive-8.s: New test.
* gas/tic6x/scomm-directive-8.d: New test.
ld/
* emulparams/elf32_tic6x_le.sh (BIG_OUTPUT_FORMAT, EXTRA_EM_FILE,
GENERATE_SHLIB_SCRIPT): New defines.
(TEXT_START_ADDR): Define differently depending on target.
(.got): Redefine to include "*(.dsbt)".
(SDATA_START_SYMBOLS): Remove, replace with
(OTHER_GOT_SYMBOLS): New.
(OTHER_BSS_SECTIONS): Define only for ELF targets.
* emultempl/tic6xdsbt.em: New file.
* gen-doc.texi: Set C6X.
* ld.texinfo: Likewise.
(Options specific to C6X uClinux targets): New section.
binutils/
* readelf.c (get_symbol_index_type): Handle SCOM for TIC6X.
(dump_relocations): Likewise.
binutils/testsuite/
* lib/binutils-common.exp (is_elf_format): Accept tic6x*-*-uclinux*.
ld/testsuite/
* ld-scripts/crossref.exp: Add CFLAGS for tic6x*-*-*.
* ld-elf/sec-to-seg.exp: Remove tic6x from list of targets defining
pagesize to 1.
* ld-tic6x/tic6x.exp: Add support for DSBT shared library/executable
linking tests.
* ld-tic6x/dsbt.ld: New linker script.
* ld-tic6x/dsbt-be.ld: New linker script.
* ld-tic6x/dsbt-overflow.ld: New linker script.
* ld-tic6x/dsbt-inrange.ld: New linker script.
* ld-tic6x/shlib-1.s: New test.
* ld-tic6x/shlib-2.s: New test.
* ld-tic6x/shlib-app-1r.s: New test.
* ld-tic6x/shlib-app-1.s: New test.
* ld-tic6x/shlib-1.sd: New test.
* ld-tic6x/shlib-1.dd: New test.
* ld-tic6x/shlib-app-1.rd: New test.
* ld-tic6x/shlib-app-1rb.rd: New test.
* ld-tic6x/shlib-app-1.sd: New test.
* ld-tic6x/static-app-1rb.od: New test.
* ld-tic6x/shlib-app-1.dd: New test.
* ld-tic6x/shlib-app-1rb.sd: New test.
* ld-tic6x/static-app-1b.od: New test.
* ld-tic6x/static-app-1r.od: New test.
* ld-tic6x/shlib-1rb.rd: New test.
* ld-tic6x/shlib-app-1rb.dd: New test.
* ld-tic6x/shlib-1rb.sd: New test.
* ld-tic6x/shlib-1rb.dd: New test.
* ld-tic6x/shlib-app-1b.od: New test.
* ld-tic6x/tic6x.exp: New test.
* ld-tic6x/static-app-1rb.rd: New test.
* ld-tic6x/shlib-app-1r.od: New test.
* ld-tic6x/static-app-1.od: New test.
* ld-tic6x/static-app-1b.rd: New test.
* ld-tic6x/static-app-1r.rd: New test.
* ld-tic6x/static-app-1rb.sd: New test.
* ld-tic6x/static-app-1b.sd: New test.
* ld-tic6x/static-app-1rb.dd: New test.
* ld-tic6x/static-app-1r.sd: New test.
* ld-tic6x/static-app-1b.dd: New test.
* ld-tic6x/shlib-1b.rd: New test.
* ld-tic6x/static-app-1r.dd: New test.
* ld-tic6x/shlib-app-1b.rd: New test.
* ld-tic6x/shlib-1r.rd: New test.
* ld-tic6x/shlib-app-1r.rd: New test.
* ld-tic6x/shlib-1b.sd: New test.
* ld-tic6x/static-app-1.rd: New test.
* ld-tic6x/shlib-app-1b.sd: New test.
* ld-tic6x/shlib-1r.sd: New test.
* ld-tic6x/shlib-1b.dd: New test.
* ld-tic6x/shlib-app-1r.sd: New test.
* ld-tic6x/shlib-app-1b.dd: New test.
* ld-tic6x/shlib-1r.dd: New test.
* ld-tic6x/static-app-1.sd: New test.
* ld-tic6x/shlib-app-1r.dd: New test.
* ld-tic6x/static-app-1.dd: New test.
* ld-tic6x/shlib-noindex.rd: New test.
* ld-tic6x/shlib-noindex.dd: New test.
* ld-tic6x/shlib-noindex.sd: New test.
* ld-tic6x/got-reloc-local-1.s: New test.
* ld-tic6x/got-reloc-local-2.s: New test.
* ld-tic6x/got-reloc-local-r.d: New test.
* ld-tic6x/got-reloc-global.s: New test.
* ld-tic6x/got-reloc-global-addend-1.d: New test.
* ld-tic6x/got-reloc-global-addend-1.s: New test.
* ld-tic6x/got-reloc-global-addend-2.d: New test.
* ld-tic6x/got-reloc-inrange.d: New test.
* ld-tic6x/got-reloc-overflow.d: New test.
* ld-tic6x/got-reloc-global-addend-2.s: New test.
* ld-tic6x/dsbt-index-error.d: New test.
* ld-tic6x/dsbt-index.d: New test.
* ld-tic6x/dsbt-index.s: New test.
* ld-tic6x/shlib-app-1.od: New test.
* ld-tic6x/shlib-app-1rb.od: New test.
* ld-tic6x/shlib-1.rd: New test.
* ld-tic6x/weak.d: New test.
* ld-tic6x/weak-be.d: New test.
* ld-tic6x/weak.s: New test.
* ld-tic6x/weak-data.d: New test.
* ld-tic6x/common.d: New test.
* ld-tic6x/common.ld: New test.
* ld-tic6x/common.s: New test.
* config/tc-mips.c (file_ase_mips16): Adjust comment.
(append_insn): Update file_ase_mips16.
(mips_after_parse_args): Don't set file_ase_mips16 here.
gas/testsuite/
* gas/mips/elf_ase_mips16.d: Update test for new MIPS16 ASE flag
semantics.
* gas/mips/elf_ase_mips16-2.d: New test.
* gas/mips/nop.s: Source for the new test.
* gas/mips/mips.exp: Run the new test.
binutils/testsuite/
* lib/binutils-common.exp (regexp_diff): Implement inverse
matching, requested by `!'.
* objcopy.c (copy_main): Rewrite OPTION_ADD_SECTION code to work
with non-ordinary files like /dev/null.
binutils/testsuite/:
* lib/utils-lib.exp (run_dump_test): Permit option values to use
$srcdir to refer to the source directory.
* binutils-all/add-section.d: New test.
* binutils-all/add-empty-section.d: New test.
* binutils-all/empty-file: New test input file.
* binutils-all/objcopy.exp: Run new tests.
2007-08-28 Mark Shinwell <shinwell@codesourcery.com>
Joseph Myers <joseph@codesourcery.com>
* elf32-arm.c (elf32_arm_compare_mapping): Compare first on vma,
then on type.
binutils/testsuite:
2007-08-28 Mark Shinwell <shinwell@codesourcery.com>
Joseph Myers <joseph@codesourcery.com>
* binutils-all/ar.exp (long_filenames): Delete temporary files on
the host.
* binutils-all/arm/objdump.exp: Only check "which $OBJDUMP" if
host is local.
* binutils-all/objcopy.exp: Use ${srecfile} to get the name of the
srec file to be passed to binutils_run.
(objcopy_test_readelf): Use remote_exec.
* binutils-all/readelf.exp (readelf_find_size): Use remote_exec.
(readelf_test): Likewise.
(readelf_wi_test): Likewise.
* lib/utils-lib.exp (run_dump_test): Only check "which $binary" if
host is local. Use remote_exec. Use $tempfile not
tmpdir/bintest.o.
gas:
2007-08-28 Mark Shinwell <shinwell@codesourcery.com>
Joseph Myers <joseph@codesourcery.com>
* as.c (main): Flush stderr before printing listings to ensure
consistent output order across platforms.
gas/testsuite:
2007-08-28 Mark Shinwell <shinwell@codesourcery.com>
Joseph Myers <joseph@codesourcery.com>
* lib/gas-defs.exp (gas_version): Use remote_* functions instead
of exec.
(gas_host_run): New.
(gas_run): Use gas_host_run.
(gas_start): Likewise.
(run_dump_test): Likewise.
(objdump): Use gas_host_run.
(objdump_start_no_subdir): Likewise.
* lib/gas-dg.exp (gas-dg-test): Use "remote_file host delete".
* lib/run: Remove.
* gas/macros/macros.exp: Download app4b.s to host.
* gas/i386/i386.exp (gas_64_check): Use gas_host_run.
(gas_32_check): Likewise.
* gas/maxq10/maxq10.exp (gas_64_check): Likewise
(gas_32_check): Likewise.
* gas/maxq20/maxq20.exp (gas_64_check): Likewise
(gas_32_check): Likewise.
* gas/sparc/sparc.exp (gas_64_check): Likewise.
* gas/cfi/cfi.exp: Likewise.
* gas/elf/elf.exp (run_list_test): Likewise. Use temporary file
for readelf output in place of pipe.
* gas/all/gas.exp: Download incbin.dat to host.
(do_comment): Allow \r\r\n.
ld:
2007-08-28 Mark Shinwell <shinwell@codesourcery.com>
Joseph Myers <joseph@codesourcery.com>
* ldlang.c (sort_sections_by_lma): Sort by internal id after lma
for stable sort.
ld/testsuite:
2007-08-28 Mark Shinwell <shinwell@codesourcery.com>
Joseph Myers <joseph@codesourcery.com>
* ld-elfcomm/elfcomm.exp: Use run_host_cmd. Only check "which
$CC" if host is local.
* ld-checks/checks.exp: Use run_host_cmd.
* ld-elf/exclude.exp: Likewise.
* ld-elf/elf.exp: Download merge.ld if host is remote.
* ld-elf/binutils.exp (binutils_test): Use remote_exec.
* ld-elf/tls_common.exp: Use run_host_cmd.
* lib/ld-lib.exp (ld_version): Only check "which $ld" if host is
local. Use remote_exec.
(run_host_cmd): New.
(run_host_cmd_yesno): New.
(default_ld_relocate): Use run_host_cmd_yesno.
(default_ld_link): Likewise.
(default_ld_simple_link): Use run_host_cmd.
(default_ld_compile): Only check "which $ccprog" if host is local.
Use remote_file and remote_exec.
(default_ld_assemble): Only check "which $as" if host is local.
Use run_host_cmd.
(default_ld_nm): Use remote_exec, remote_upload and remote_file.
(run_dump_test): Use remote_exec, remote_upload and remote_file.
Only check "which $binary" if host is local.
(run_ld_link_tests): Use remote_exec, remote_upload and
remote_file.
* ld-selective/selective.exp: Only check "which $CXX" if host is
local. Use remote_exec.
* ld-scripts/phdrs.exp: Only check "which $objdump" if host is
local. Use run_host_cmd.
* ld-scripts/phdrs2.exp: Likewise.
* ld-scripts/weak.exp: Likewise.
* ld-undefined/weak-undef.exp: Likewise.
* ld-scripts/crossref.exp: Only check "which $CC" if host is local.
Use run_host_cmd.
* ld-scripts/map-address.exp: Upload map_address.map if host is
remote.
* ld-srec/srec.exp (run_srec_tests): Use run_host_cmd. Only check
"which $CC" and "which $CXX" if host is local.
* ld-undefined/undefined.exp: Only check "which $CC" if host is
local. Use remote_file and run_host_cmd.
* config/default.exp: Use remote_exec to create tmpdir.
(PREFIX_ALIAS_BASE): Define.
(struct export): Add member import_name;
(def_exports): Set import_name.
(make_one_lib_file): Remove prefix alias code, use import_name in .idata$6.
(gen_lib_file): Create and delete aliases.
* binutils-all/alias.def: New file.
* binutils-all/dlltool.exp: Two new -p tests.
* config/default.exp (dlltool_gas_flag): New variable.
Copy gas and lds executables into tmpdir/gas directory rather than making
symlinks which might not be supported by the host OS.
Attempt to handle the case where the host OS does not use the .exe extension
but the target OS does.
* lib/utils-lib.exp (exe_ext): New procedure.
