highlights from: http://gcc.gnu.org/gcc-4.6/changes.html
GCC now has stricter checks for invalid command-line options
New -Wunused-but-set-variable and -Wunused-but-set-parameter
warnings
Many platforms have been obsoleted
Link-time optimization improvements
A new switch -fstack-usage has been added
A new function attribute leaf was introduced
A new warning, enabled by -Wdouble-promotion
Support for selectively enabling and disabling warnings via
#pragma GCC diagnostic has been added
There is now experimental support for some features from the
upcoming C1X revision of the ISO C standard
Improved experimental support for the upcoming C++0x ISO C++
standard
G++ now issues clearer diagnostics in several cases
Updates for ARM, x86, MIPS, PPC/PPC64, SPARC
Darwin, FreeBSD, Solaris 2, MinGW and Cygwin now all support
__float128 on 32-bit and 64-bit x86 targets. [*1]
highlights from: http://gcc.gnu.org/gcc-4.7/changes.html
The -fconserve-space flag has been deprecated
Support for a new parameter --param case-values-threshold=n
was added
Interprocedural and Link-time optimization improvements
A new built-in, __builtin_assume_aligned, has been added
A new warning option -Wunused-local-typedefs was added
A new experimental command-line option -ftrack-macro-expansion
was added
Support for atomic operations specifying the C++11/C11 memory
model has been added
There is support for some more features from the C11 revision
of the ISO C standard
Improved experimental support for the new ISO C++ standard,
C++11
Updates for ARM, x86, MIPS, PPC/PPC64, SH, SPARC, TILE*
A new option (-grecord-gcc-switches) was added
highlights from: http://gcc.gnu.org/gcc-4.8/changes.html
GCC now uses C++ as its implementation language. This means
that to build GCC from sources, you will need a C++
compiler that understands C++ 2003
DWARF4 is now the default when generating DWARF debug
information
A new general optimization level, -Og, has been introduced
A new option -ftree-partial-pre was added
The option -fconserve-space has been removed
The command-line options -fipa-struct-reorg and
-fipa-matrix-reorg have been removed
Interprocedural and Link-time optimization improvements
AddressSanitizer, a fast memory error detector, has been
added [*2]
A new -Wsizeof-pointer-memaccess warning has been added
G++ now supports a -std=c++1y option for experimentation
with features proposed for the next revision of the
standard, expected around 2014
Improved experimental support for the new ISO C++ standard,
C++11
A new port has been added to support AArch64
Updates for ARM, x86, MIPS, PPC/PPC64, SH, SPARC, TILE*
[*1] we should support this too!
[*2] we should look into this.
https://code.google.com/p/address-sanitizer/
- convert to using ${EXTERNAL_GCC_SUBDIR}
- define base-external-gpl3-gcc* subdir as GCC_SUBDIR
- use <bsd.init.mk> over <bsd.own.mk> for a bunch of places; mostly
because it arranges for ../Makefile.inc to be included earlier, and
don't bother including the latter if the former is already included.
- move all .PATH: settings after <bsd.{own,lib}.mk> so that all
valid variables are set before it is evaluated
- rename mknative-gcc* to match their subdir name.
XXX the relationship between the Makefile.inc/Makefile.gcc_path files
is kind of sketchy, it would be great if this was fixed.
upgrading the normal GCC to 4.8.
this tree has had ChangeLog entries removed, as well as all the
other components we delete, and "only" weighs in around 140MB now.
assumption that .text code comes first in kernels about bootblock so
that the first symbol defined becomes the start address. This change
puts .text before other .text like sections.
Add a "mem_noofs_operand" predicate and corresponding "w" constraint.
Use those instead of "memory_reg_operand"/"m" for some atomic instrinsic
patterns: casx (and friends) do not accept an offset from the pointer
register (they are synthetic instructions mapping to e.g. casxa [..]
ASI_P, ... and the opcode space encoding offsets in other instructions
is needed to encode the ASI here).
This fixes the build of gtk+-3.10.6 from pkgsrc on sparc64.
as initial value for new processes. This means that long double
computations get the expected 63bit mantissa. Binaries tagged as
compiled for 6.99.25 and older get the old value.
Add a simple test case to ensure that double and long double computation
are working correctly.
"bfd_configure.lineno" instead of "configure.lineno" as the name of the
a version of the script that has had all uses of $LINENO converted to
literal line numbers.
Now building tools via "MKCROSSGDB=yes build.sh tools" works again, even
if the shell does not support $LINENO.
The previous problem was caused by an interaction
between the way .../gdb/dist/opcodes/configure executes
"${srcdir}/../bfd/configure --version", and the way both configure
scripts tried to create and then execute configure.lineno scripts.
Both configure.lineno scripts were created in the same OBJDIR,
with the configure.lineno from .../bfd/configure overwriting the
configure.lineno from .../opcodes/configure, while the latter was
still running.
1. having the same named file in two different directories (agent.c)
2. trying to override fnmatch twice (easier than making configure mechanism
to not overwrite).
News from: http://sourceware.org/gdb/news:
August 30th, 2013: GDB 7.6.1 Released!
The latest version of GDB, version 7.6.1, is available for download.
This is a minor corrective release over GDB 7.6, fixing the following issues:
PR tdep/15420 (Cannot debug threaded programs on newer versions of x86-solaris - Solaris 10, Update 10 or later)
PR remote/15455 (QTro remote packet broken)
PR build/15476 (Build failure due to incomplete enum type in utils.h)
PR server/15594 (tls support in 64x32 x86 gdbserver doesn't extend address to 64 bit)
PR server/15075 (dprintf inteferes with "next")
PR server/15434 (dprintf uses a synchronous 'continue' even in non-stop mode)
PR tui/14880 (In split register layouts, up results in assertion failure in value.c)
PR c++/15519 (GDB 7.6 is 94x slower than GDB 7.5.1 using a certain core file)
PR gdb/15837 (GDB prints entry values for local variables)
PR gdb/15415 (gdb resolves symbolic links when passing argv[0])
PR cli/15603 (CTRL-C can no longer interrupt inferior)
PR gdb/15604 (gdbserver socket leak 7.5 regression)
April 26th, 2013: GDB 7.6 Released!
The latest version of GDB, version 7.6, is available for download.
Changes in this release include:
New native configurations (ARM AArch64 GNU/Linux, FreeBSD/powerpc, 86_64/Cygwin and Tilera TILE-Gx GNU/Linux)
New target configurations (ARM AArch64, ARM AArch64 GNU/Linux, Lynx 178 PowerPC, x86_64/Cygwin, and Tilera TILE-Gx GNU/Linux)
Support for the "mini debuginfo" section, .gnu_debugdata
The C++ ABI now defaults to the GNU v3 ABI
More Python scripting improvements
Some GDB/MI improvements
New configure options, new commands, and options
New remote packets
A new "target record-btrace" has been added while the "target record" command has been renamed to "target record-full"
See the NEWS file for a more complete and detailed list of what this release includes.
March 12th, 2013: GDB 7.6 branch created
The GDB 7.6 branch (gdb_7_6-branch) has been created. To check out a copy of the branch use:
cvs -d :pserver:anoncvs@sourceware.org:/cvs/src co -r gdb_7_6-branch gdb
November 29th, 2012: GDB 7.5.1 Released!
The latest version of GDB, version 7.5.1, is available for download.
This is a minor corrective release over GDB 7.5, fixing the following issues:
An "Attempt to dereference a generic pointer" errors (-var-create).
Backtrace problems on x32 (PR backtrace/14646).
next/step/finish problems on x32 (PR gdb/14647).
A "malformed linespec error: unexpected keyword, [...]" error (PR breakpoints/14643).
GDB crash while stepping through powerpc (32bits) code.
A failed assertion in linux_ptrace_test_ret_to_nx.
A "!frame_id_inlined_p (frame_id)" failed assertion.
A "No more reverse-execution history." error during reverse "next" execution (PR 14548).
Incomplete command descriptions in "apropos" output.
PR gdb/14494 (a GDB crash difficult to characterize).
Various build warnings.
August 17th, 2012: GDB 7.5 Released!
The latest version of GDB, version 7.5, is available for download.
Changes in this release include:
Go language support.
New targets (x32 ABI, microMIPS, Renesas RL78, HP OpenVMS ia64).
More Python scripting improvements.
SDT (Static Defined Tracing) probes support with SystemTap probes.
GDBserver improvements (stdio connections, target-side evaluation of breakpoint conditions, remote protocol improvements).
Other miscellaneous improvements (ability to stop when a shared library is loaded/unloaded, dynamic printf, etc).
Reverse debugging on ARM.
The binary "gdbtui" has been abandoned and can no longer be built. Use "gdb -tui" instead.
See the NEWS file for a more complete and detailed list of what this release includes.
July 17th, 2012: GDB 7.5 branch created
The GDB 7.5 branch (gdb_7_5-branch) has been created. To check out a copy of the branch use:
cvs -d :pserver:anoncvs@sourceware.org:/cvs/src co -r gdb_7_5-branch gdb
April 26th, 2012: GDB 7.4.1 Released!
The latest version of GDB, version 7.4.1, is available for download.
This is a minor corrective release over GDB 7.4, fixing the following issues:
[GDB/MI] Error when resuming program execution in all-stop mode ("Cannot execute this command without a live selected thread").
[Pascal] Polluted display of class methods parameters.
[target remote] Errror when connecting to remote target where disconnected tracing is in effect.
[AVX] Float and ymm* register values not available.
[GDB] Crash when using the "finish" command.
[build] makeinfo should not be required to build GDB.
January 24th, 2012: GDB 7.4 Released!
The latest version of GDB, version 7.4, is available for download.
Changes in this release include:
Many Python scripting improvements
Better support for ambiguous linespecs
Masked watchpoints
Tracepoint support improvements
Support for Texas Instruments TMS320C6x (tic6x-*-*)
A Renesas RL78 simulator (rl78-*-elf)
Some minor Remote protocol extensions and GDB/MI changes
See the NEWS file for a more complete and detailed list of what this release includes. Note that the gdbtui binary is deprecated, starting with GDB 7.5. Use "gdb -tui" instead.
January 9, 2012: Extensibility support using Guile
GDB ought to support extensibility using Guile, the GNU extensibility package (an implementation of Scheme). We are looking for people to write the code to interface the two. Please write to gdb-patches AT sourceware DOT org if you are interested.
December 13, 2011: GDB 7.4 branch created
The GDB 7.4 branch (gdb_7_4-branch) has been created. To check out a copy of the branch use:
cvs -d :pserver:anoncvs@sourceware.org:/cvs/src co -r gdb_7_4-branch gdb
September 30, 2011: Release Mistakes in GDB Versions 6.0 - 7.3
A mistake has been detected in the release tar files for all GDB releases from version 6.0 to version 7.3 (included). The mistake has been corrected, and the FSF issued the following announcements:
Making up for a release mistake in GDB versions 6.0 - 6.6
Making up for a release mistake in GDB versions 6.7 - 7.3
News from: http://sourceware.org/gdb/news:
August 30th, 2013: GDB 7.6.1 Released!
The latest version of GDB, version 7.6.1, is available for download.
This is a minor corrective release over GDB 7.6, fixing the following issues:
PR tdep/15420 (Cannot debug threaded programs on newer versions of x86-solaris - Solaris 10, Update 10 or later)
PR remote/15455 (QTro remote packet broken)
PR build/15476 (Build failure due to incomplete enum type in utils.h)
PR server/15594 (tls support in 64x32 x86 gdbserver doesn't extend address to 64 bit)
PR server/15075 (dprintf inteferes with "next")
PR server/15434 (dprintf uses a synchronous 'continue' even in non-stop mode)
PR tui/14880 (In split register layouts, up results in assertion failure in value.c)
PR c++/15519 (GDB 7.6 is 94x slower than GDB 7.5.1 using a certain core file)
PR gdb/15837 (GDB prints entry values for local variables)
PR gdb/15415 (gdb resolves symbolic links when passing argv[0])
PR cli/15603 (CTRL-C can no longer interrupt inferior)
PR gdb/15604 (gdbserver socket leak 7.5 regression)
April 26th, 2013: GDB 7.6 Released!
The latest version of GDB, version 7.6, is available for download.
Changes in this release include:
New native configurations (ARM AArch64 GNU/Linux, FreeBSD/powerpc, 86_64/Cygwin and Tilera TILE-Gx GNU/Linux)
New target configurations (ARM AArch64, ARM AArch64 GNU/Linux, Lynx 178 PowerPC, x86_64/Cygwin, and Tilera TILE-Gx GNU/Linux)
Support for the "mini debuginfo" section, .gnu_debugdata
The C++ ABI now defaults to the GNU v3 ABI
More Python scripting improvements
Some GDB/MI improvements
New configure options, new commands, and options
New remote packets
A new "target record-btrace" has been added while the "target record" command has been renamed to "target record-full"
See the NEWS file for a more complete and detailed list of what this release includes.
March 12th, 2013: GDB 7.6 branch created
The GDB 7.6 branch (gdb_7_6-branch) has been created. To check out a copy of the branch use:
cvs -d :pserver:anoncvs@sourceware.org:/cvs/src co -r gdb_7_6-branch gdb
November 29th, 2012: GDB 7.5.1 Released!
The latest version of GDB, version 7.5.1, is available for download.
This is a minor corrective release over GDB 7.5, fixing the following issues:
An "Attempt to dereference a generic pointer" errors (-var-create).
Backtrace problems on x32 (PR backtrace/14646).
next/step/finish problems on x32 (PR gdb/14647).
A "malformed linespec error: unexpected keyword, [...]" error (PR breakpoints/14643).
GDB crash while stepping through powerpc (32bits) code.
A failed assertion in linux_ptrace_test_ret_to_nx.
A "!frame_id_inlined_p (frame_id)" failed assertion.
A "No more reverse-execution history." error during reverse "next" execution (PR 14548).
Incomplete command descriptions in "apropos" output.
PR gdb/14494 (a GDB crash difficult to characterize).
Various build warnings.
August 17th, 2012: GDB 7.5 Released!
The latest version of GDB, version 7.5, is available for download.
Changes in this release include:
Go language support.
New targets (x32 ABI, microMIPS, Renesas RL78, HP OpenVMS ia64).
More Python scripting improvements.
SDT (Static Defined Tracing) probes support with SystemTap probes.
GDBserver improvements (stdio connections, target-side evaluation of breakpoint conditions, remote protocol improvements).
Other miscellaneous improvements (ability to stop when a shared library is loaded/unloaded, dynamic printf, etc).
Reverse debugging on ARM.
The binary "gdbtui" has been abandoned and can no longer be built. Use "gdb -tui" instead.
See the NEWS file for a more complete and detailed list of what this release includes.
July 17th, 2012: GDB 7.5 branch created
The GDB 7.5 branch (gdb_7_5-branch) has been created. To check out a copy of the branch use:
cvs -d :pserver:anoncvs@sourceware.org:/cvs/src co -r gdb_7_5-branch gdb
April 26th, 2012: GDB 7.4.1 Released!
The latest version of GDB, version 7.4.1, is available for download.
This is a minor corrective release over GDB 7.4, fixing the following issues:
[GDB/MI] Error when resuming program execution in all-stop mode ("Cannot execute this command without a live selected thread").
[Pascal] Polluted display of class methods parameters.
[target remote] Errror when connecting to remote target where disconnected tracing is in effect.
[AVX] Float and ymm* register values not available.
[GDB] Crash when using the "finish" command.
[build] makeinfo should not be required to build GDB.
January 24th, 2012: GDB 7.4 Released!
The latest version of GDB, version 7.4, is available for download.
Changes in this release include:
Many Python scripting improvements
Better support for ambiguous linespecs
Masked watchpoints
Tracepoint support improvements
Support for Texas Instruments TMS320C6x (tic6x-*-*)
A Renesas RL78 simulator (rl78-*-elf)
Some minor Remote protocol extensions and GDB/MI changes
See the NEWS file for a more complete and detailed list of what this release includes. Note that the gdbtui binary is deprecated, starting with GDB 7.5. Use "gdb -tui" instead.
January 9, 2012: Extensibility support using Guile
GDB ought to support extensibility using Guile, the GNU extensibility package (an implementation of Scheme). We are looking for people to write the code to interface the two. Please write to gdb-patches AT sourceware DOT org if you are interested.
December 13, 2011: GDB 7.4 branch created
The GDB 7.4 branch (gdb_7_4-branch) has been created. To check out a copy of the branch use:
cvs -d :pserver:anoncvs@sourceware.org:/cvs/src co -r gdb_7_4-branch gdb
September 30, 2011: Release Mistakes in GDB Versions 6.0 - 7.3
A mistake has been detected in the release tar files for all GDB releases from version 6.0 to version 7.3 (included). The mistake has been corrected, and the FSF issued the following announcements:
Making up for a release mistake in GDB versions 6.0 - 6.6
Making up for a release mistake in GDB versions 6.7 - 7.3
sets PICFLAGS=-fPIC and we pick this via CSHLIBFLAGS to build .o objects.
This breaks the sun2 port, because with -fPIC we end up producing short
relative pic branches for $_exception_handler, so we get relocation errors.
Arguably:
1. MKPIC=no should not set PICFLAGS in bsd.lib.mk
2. CSHLIBFLAGS should not be used in non pic (.o) productions
Notes at offset 0x00000128 with length 0x00000018:
Owner Data size Description
NetBSD 0x00000004 IDENT 699002300 (6.99.23)
Notes at offset 0x00000154 with length 0x00000020:
Owner Data size Description
NetBSD 0x00000009 MARCH <earmv7hf>
them so we get DT_TEXTREL problems.
So if pic && SHARED, we force EH_FRAME to be writeable (which is what would
happen if .cfi_personality was not supported).
When building libgcc_s.so for m68k, this gets rid of
m68k--netbsdelf/4.5.4/../../../../m68k--netbsdelf/bin/ld: warning: creating a DT_TEXTREL in a shared object.
