Mail Archives: cygwin/2009/07/04/21:16:31
I've made a new version of binutils available for installation. This is
a much-needed, much-delayed refresh against the current CVS. It should
work better with gcc-4.
The list of changes is included after the unsubscribe info. This is a
list of changes from three binutils NEWS files. Some entries may not be
pertinent to Cygwin.
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* * * *
*** binutils changes:
* Readelf can now display the relocated contents of a section as a sequence
of bytes via the --relocated-dump=<name|number> command line option.
* The gprof program has been given a new command line option:
--external-symbols-table=<filename> which reads in symbols from a specified
file.
* The plugin target has been added to bfd. It can load the same shared objects
used by gold and uses them to provide basic support for new file formats.
* The verilog memory hex dump file format is now supported as an output format
for objcopy.
* Add --file-alignment, --heap, --image-base, --section-alignment,
--stack and --subsystem command line options to objcopy, which will
set PE optional header.
* Option --dwarf/-W of objdump is now as flexible as readelf --debug-dump/-w.
* --as-needed now links in a dynamic library if it satisfies undefined
symbols in regular objects, or in other dynamic libraries. In the
latter case the library is not linked if it is found in a DT_NEEDED
entry of one of the libraries already linked.
* Added --prefix=PREFIX and --prefix-strip=LEVEL switches to objdump to
add absolute paths for -S.
* Add new option --use-nul-prefixed-import-tables to dlltool to allow fall-
back to old import table generation with null element prefix.
* Added --identify-strict switch to cause --identify <implib> to
report an error when the import library is associated with
multiple DLLs.
* Added --identify <implib> option to dlltool, which determines the
name of the DLL associated with the specified <implib>.
* Support for PowerPC booke64 instructions has been removed. The assembler no
longer accepts -mbooke32 or -mbooke64 and the disassembler no longer accepts
-Mbooke32 or -Mbooke64. Instead, -mbooke and -Mbooke should be used.
Changes in 2.19:
* Added -wL switch to dump decoded contents of .debug_line.
* Added support for "thin" archives which contain pathnames pointing to
*** gas changes:
* Add support for common symbol alignment to PE formats.
* Add support for the new discriminator column in the DWARF line table,
with a discriminator operand for the .loc directive.
* Add support for Sunplus score architecture.
* The .type pseudo-op now accepts a type of STT_GNU_IFUNC which can be used to
indicate that if the symbol is the target of a relocation, its value should
not be use. Instead the function should be invoked and its result used as
the value.
* Add support for Lattice Mico32 (lm32) architecture.
Changes in 2.19:
* New pseudo op .cfi_val_encoded_addr, to record constant addresses in unwind
tables without runtime relocation.
* New command line option, -h-tick-hex, for sh, m32c, and h8/300 targets, which
adds compatibility with H'00 style hex constants.
*** ld changes:
* PE targets now support a GNU extension to allow the alignment of common
common symbols to be specified. This support uses custom options in
the .drectve section, which will be disregarded by the native tools.
* PE targets now add primitive support for ELF version scripts; symbols
are not versioned, but the local and global symbol visibility directives
are respected when filtering symbols in auto-export mode.
* New option --no-export-dynamic to undo the effect of the -E and
--export-dynamic options.
* ELF: --warn-alternate-em option to warn if an object has alternate
ELF machine code.
* New script function REGION_ALIAS to add alias names to memory regions.
* PE targets no longer make use of the long section names PE extension to
the COFF format when generating executable images, by default. The old
(slightly non-conformant) behaviour can still be invoked by using the
new '--enable-long-section-names' command-line option. It is also enabled
automatically in the presence of un-stripped debug information, as GDB
needs to be able to find the debug info sections by their full names.
* For GNU/Linux systems the linker will now avoid processing any relocations
made against symbols of the STT_GNU_IFUNC type and instead emit them into
the resulting binary for processing by the loader.
* --as-needed now links in a dynamic library if it satisfies undefined
symbols in regular objects, or in other dynamic libraries. In the
latter case the library is not linked if it is found in a DT_NEEDED
entry of one of the libraries already linked.
* Add a new command line option, -Ttext-segment ADDR, for ELF targets
to set the address of the first byte of the text segment.
* Add support for Sunplus score architecture.
* Add new option --use-nul-prefixed-import-tables to ld for PE targets to
allow fallback to old import table generation with null element prefix.
* Windows PE systems now support a new --exclude-modules-for-implib option,
allowing users to partition object files and archive members between a DLL
and its associated import library as they are generated during linking.
* Add support for Lattice Mico32 (lm32) architecture.
* Add CR16 ELF --embedded-relocs (used to embedded relocations into binaries
for Embedded-PIC code) option.
* Add to the PE/PE+ targets the support of two different kinds of
pseudo-relocations. They can be selected by the switches
--enable-runtime-pseudo-reloc-v1 and --enable-runtime-pseudo-reloc-v2.
For the switch --enable-runtime-pseudo-reloc it uses for 32-bit
runtime pseudo relocation version one, for 64-bit the version two.
Changes in 2.19:
* Linker scripts support a new INSERT command that makes it easier to
augment the default script.
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