- November 13, 2000
-
GCC now supports two more ISO C99 features:
- The builtin boolean
_Bool
type and the
<stdbool.h>
header. (GCC 2.95 had a non-conforming
<stdbool.h>
header; code that used that header will
not be binary compatible with code using the new conforming
version.)
- Mixed declarations and code in compound statements.
- November 2, 2000
-
The C, C++ and Objective C front-ends to GCC now use an integrated
preprocessor by default. If all goes well, this will also be the
default mode for GCC 3.0.
- November 1, 2000
-
Support for C99's
_Pragma
operator has been added to the
preprocessor. This feature effectively makes it possible to have
#pragma
directives be part of macro expansions, and to
have their arguments expanded too if necessary.
- October 6, 2000
-
We would like to point out that GCC 2.96 is not a formal GCC release nor
will there ever be such a release. Rather, GCC 2.96 has been the code-
name for our development branch that will eventually become GCC 3.0.
More...
- Sep 11, 2000
-
Zack Weinberg of Cygnus, a Red Hat company, has contributed
modifications to the C, C++, and Objective C compilers which permit
them to use the C preprocessor library (cpplib) directly instead of
via a separate executable.
This is not yet the default mode, but we hope it will be the
default in GCC 3.0. When it is used the compiler will be faster
because it will not have to do lexical analysis twice, nor save the
preprocessed output to a temporary file. In the future, this will
permit better error messages, and more detailed debugging information
particularly when complex macros are used.
- Sep 11, 2000
-
Neil Booth has contributed a new lexer and macro-expander for the C
preprocessor. The lexer makes a single pass over the source files,
whereas previously it made two. The macro expander operates on
lexical tokens instead of text strings.
ISO C, C++, and Objective C use the new preprocessor. Traditional
(K+R) C, Fortran, and Chill use an older implementation (taken from
GCC 1) which obeys the rules for pre-standard C preprocessing. Either
version may be used to preprocess assembly language.
- May 2, 2000
-
Stan Cox and Jason Eckhardt of Cygnus, a Red Hat company, have
contributed a basic block reordering
pass. The optimization can reposition basic blocks from across
the entire function in an attempt to reduce branch penalties and
enhance instruction cache efficiency.
Our thanks go to Michael Hayes, Jan Hubicka, and Graham Stott who
noticed or fixed defects or made other useful suggestions.
- May 1, 2000
-
Richard Earnshaw of ARM Ltd, and Nick Clifton of Cygnus, a Red Hat
company, have contributed a new backend for the Arm and Thumb
processors.
The new backend combines code generation for the Arm, the Thumb and
the StrongArm into one compiler, with the target processor and
instruction sets being selectable via command line switches.
- April 30, 2000
-
Michael Meissner and Nick Clifton of Cygnus, a Red Hat company, have
contributed a port for the Mitsubishi D30V processor.
Michael Meissner and Richard Henderson of Cygnus, a Red Hat company,
have contributed a new if-conversion pass. The code runs faster and
identifies more optimization opportunities than the old code. In
addition, it also has support for conditional (predicated) execution,
such as is found in the Intel IA-64 architecture, the ARM processors,
and numerous embedded LIW and DSP parts.
- March 22, 2000
-
The Steering Committee has appointed Mark Mitchell, of CodeSourcery, LLC, to manage the
GCC 3.0 release and as a new Steering Committe member.
CodeSourcery will be providing time from Mark, Alex Samuel, and other
personnel, to manage the release. Thanks!
The Steering Committee and the GCC community owe Jeff Law an immense
debt for his work as release manager for the EGCS 1.0.x, 1.1.x, and
GCC 2.95.x series of releases. He has done an outstanding job.
- March 18, 2000
-
Andy Vaught has started work on GNU Fortran 95, the Fortran
Frontend destined to implement the latest standard. See
this page for its current
status (previously over here).
- March 17, 2000
-
Jim Wilson and Richard Henderson of Cygnus, a Red Hat company, and
David Mosberger of HP labs have
contributed a port for the Intel Itanium (aka IA-64) processor.
Jeff Law and Richard Henderson of Cygnus, a Red Hat company, have contributed
RTL based tail call elimination optimizations. Support currently exists for
the Alpha, HPPA, ia32 and MIPS processors. Long term the RTL based
tail call optimizations will be replaced with a tree based tail call
optimizer.
- March 14, 2000
-
CodeSourcery, LLC is now providing nightly snapshots of
GCC, distributed as RPMs for GNU/Linux on Intel platforms, plus
build logs and testsuite results. In order to allow users to more
easily confirm whether the current snapshot of GCC fixes a particular
bug, an online compilation web form is
provided.
- March 13, 2000
-
Denis Chertykov contributed an AVR port.
AVR is a family of micro controllers made by Atmel with embedded FLASH
program memory and embedded RAM. It is the first GCC port to an 8-bit
microprocessor with a 16-bit address bus.
- March 9, 2000
-
CodeSourcery, LLC and Cygnus, a Red Hat company, have contributed an
implementation of static single assignment
(SSA) representation. SSA will facilitate the implementation of
powerful code optimizations in GCC.
- March 2, 2000
-
Jason Molenda, who had a major role in setting up and managing the
gcc.gnu.org (originally egcs.cygnus.com) machine and site, is leaving
Cygnus. We would like to thank him for his efforts and support behind
the scenes and wish Jason all the best in his new job.
- February 23, 2000
-
Cygnus, a Red Hat company, contributed an M*Core port.
- January 4, 2000
-
Steve Chamberlain has contributed a picoJava port.
- December 10, 1999
-
CodeSourcery, LLC has contributed a new inliner for
C++. As a result, the compiler may use dramatically less
time and memory to compile programs that make heavy use of templates.
- December 1, 1999
-
Cygnus has donated support for the Matsushita AM33 processor (a member
of the MN10300 processor family). The MN103 family is targeted towards
embedded consumer products such as DVD players, HDTV, etc.
- October 27, 1999
-
GCC 2.95.2 is released.
- October 16, 1999
-
Craig Burley, our lead Fortran developer and the original author
of g77, announced that he will stop working on g77 beyond the 2.95
series. On behalf of the entire GCC team, the steering committee
would like to thank Craig for his work.
Craig has written a detailed analysis of the
current state
and
possible future
of g77, available at his
g77 web site.
If you are interested in helping with g77, please contact us!
- October 12, 1999
-
We are pleased to announce that Richard Earnshaw and Jason Merrill have been
given global write permissions throughout the GCC sources.
-
Cygnus has installed
various upgrades to improve services
for GCC and other open source projects hosted by Cygnus.
- October 11, 1999
-
The gcc steering committee welcomes a new
member: Gerald Pfeifer. His insights into political issues and his web
improvement work were and will be of great use.
- September 21, 1999
-
Nick Clifton of Cygnus Solutions has donated support for the Fujitsu
FR30 processor. The FR30 is a low-cost 32bit cpu intended for larger
embedded applications. It has a simple load/store architecture, 16
general registers and a variable length instruction set. Additional
details about the FR30 can be found at
Fujitsu's web
site.
- September 20, 1999
-
Cygnus Solutions has donated two new global optimizers to GCC.
Global Null Pointer Test Elimination and
Global Code Hoisting/Unification.
- September 3, 1999
-
Long time GCC contributors Mark Mitchell and Richard Kenner have been
given global write permissions. They are authorized to install and
approve patches to any part of the compiler.
Richard Kenner will initially be working on merging in the remaining
changes from the old GCC 2 sources.
- September 2, 1999
-
Richard Henderson has finished merging the ia32 backend rewrite into the
mainline GCC sources. The rewrite is designed to improve optimization
opportunities for the Pentium II target, but also provides a cleaner
way to optimize for the Pentium III, AMD-K7 and other high end ia32
targets as they appear.
- August 31, 1999
- Cygnus Solutions has released
libgcj
version 2.95.1 Java runtime libraries for use with GCC 2.95.1.
- August 19, 1999
-
GCC 2.95.1 is released.
- August 4, 1999
-
A new snapshot of the new
Standard C++ Library V3 has been released. You can find more information
from the
libstdc++ project's home page.
Cygnus Solutions has released
libgcj
version 2.95 Java runtime libraries for use with GCC 2.95.
- August 2, 1999
-
Mumit Khan has
pre-built gcc-2.95 binary packages for Windows platforms.
- July 31, 1999
-
GCC 2.95 is released.
- July 11, 1999
-
Cygnus Solutions has donated support for a generic i386-elf target.
(Note that this will not be included in gcc 2.95.)
- June 29, 1999
-
Cygnus Solutions has donated hpux11 support.
(Note that this will not be included in gcc 2.95.)
- June 15, 1999
-
Cygnus Solutions has donated a major rewrite of the Intel IA-32
back end, focusing on better optimization for the Pentium II.
(Note that this will not be included in gcc 2.95.)
- May 27, 1999
-
Toon Moene has emailed (and posted) his notes on
the GNU Fortran (
g77
) Birds-of-a-Feather (BOF) session at LinuxExpo
to the appropriate lists,
and Craig Burley has made Toon's notes available (in edited form) at http://world.std.com/~burley/bof.html.
Probably the most important decision reached at the meeting
is that Craig Burley will undertake the long-awaited 0.6 rewrite
of the g77
front end as his top priority for
the gcc
3.0 release,
rather than focusing on implementing some of the most wanted
features that didn't require the rewrite,
such as Cray pointers.
The BOF provided us with
some additional information to guide future development of
GNU Fortran.
Thanks to all who attended, whether in person or in spirit!
- May 18, 1999
-
The sixth snapshot of the ongoing re-written C++ Standard Library has
been released. It includes SGI STL 3.2, an automatically generated
<limits>
, a partially re-written valarray, a working
stringbuf and stringstream (for basic types). For more information,
please check
libstdc++-2.90.5.
- April 23, 1999
-
g77
now supports optional run-time checking
of array subscript expressions
via the -fbounds-check
compiler option.
(The same option applies to whatever bounds-checking
applies for other languages, such as Java.
The -ffortran-bounds-check
option specifies
bounds-checking for Fortran code.)
- April 20, 1999
-
Yes, it is not a hoax: The egcs steering committee is appointed official
GNU maintainer for GCC; the egcs team will be responsible for rolling out
future GCC releases.
This will require some changes in policy and procedures for the project.
We will provide more information on those changes as they are available.
www.gnu.org has the FSF announcement
under the "GNU flashes" heading.
- April 15, 1999
-
Mark Mitchell is now a co-maintainer of the C++ front end along with
Jason Merrill.
- April 13, 1999
-
We have set up a new mailing list
gcc-cvs-wwwdocs
that tracks checkins to the egcs webpages CVS repository.
- April 7, 1999
-
Cygnus announces the first public
release of libgcj, the runtime component of the GNU compiler for Java.
Read the release announcement.
Goto the libgcj homepage.
- April 6, 1999
-
A new snapshot of the C++ standard library re-write has been
released. This release includes SGI STL 3.12, a working valarray, and
several (but not all) parts of templatized iostreams--for more information see:
libstdc++-2.90.4.
- March 23, 1999
-
Through the efforts of John Wehle and Bernd Schmidt, GCC will now attempt to
keep the stack 64bit aligned on the x86 and allocate doubles on 64bit
boundaries. This can significantly improve floating point performance on the
x86. Work will continue on aligning the stack and floating point values in
the stack.
- March 15, 1999
-
egcs-1.1.2 is released.
- March 10, 1999
-
Cygnus donates
improved global constant propagation and
lazy code motion optimizer framework.
- March 7, 1999
-
The egcs project now has
additional online documentation.
- February 26, 1999
-
Richard Henderson of
Cygnus Solutions has donated a major
rewrite of the
control flow analysis pass of the compiler.
- February 25, 1999
-
Marc Espie has donated support for
OpenBSD on the Alpha, SPARC, x86, and m68k platforms. Additional targets
are expected in the future.
- January 21, 1999
-
Cygnus donates support for the PowerPC
750 processor. The PPC750 is a 32bit superscalar implementation of the
PowerPC family manufactured by both Motorola and IBM. The PPC750 is targetted
at high end Macs as well as high end embedded applications.
- January 18, 1999
-
Christian Bruel and Jeff Law donate improved
local dead store elimination.
- January 14, 1999
-
Cygnus donates support for Hypersparc
(SS20) and Sparclite86x (embedded) processors.
- December 7, 1998
-
Cygnus donates support for demangling of
HP aCC symbols.
- December 4, 1998
-
egcs-1.1.1 is released.
- November 26, 1998
-
A database with test results
is now available online, thanks to Marc Lehmann.
- November 23, 1998
-
egcs now can dump flow graph information usable for
graphical representation.
Contributed by Ulrich Drepper.
- November 21, 1998
-
Cygnus donates support for the SH4
processor.
- November 10, 1998
- An official steering committee has been formed. Here is the
original announcement.
- November 5, 1998
- The third snapshot of the rewritten libstdc++ is available.
You can read some more on
http://sources.redhat.com/libstdc++/.
- October 27, 1998
-
Bernd Schmidt donates localized spilling support.
- September 22, 1998
-
IBM Corporation delivers an update
to the IBM Haifa instruction scheduler and
new software pipelining and branch
optimization support.
- September 18, 1998
-
Michael Hayes donates
c4x port.
- September 6, 1998
-
Cygnus donates Java front end.
- September 3, 1998
-
egcs-1.1 is released.
- August 29, 1998
-
Cygnus donates Chill front end and runtime.
- August 25, 1998
-
David Miller donates rewritten sparc backend.
- August 19, 1998
-
Mark Mitchell donates load hoisting and store
sinking support.
- July 15, 1998
- The first snapshot of the rewritten libstdc++ is available.
You can read some more here.
- June 29, 1998
-
Mark Mitchell donates alias analysis
framework.
- May 26, 1998
-
We have added two new mailing lists for the egcs project.
gcc-cvs and egcs-patches.
When a patch is checked into the CVS repository, a check-in notification
message is automatically sent to the gcc-cvs mailing list. This will
allow developers to monitor changes as they are made.
Patch submissions should be sent to egcs-patches instead of the
main egcs list. This is primarily to help ensure that patch submissions do
not get lost in the large volume of the main mailing list.
- May 18, 1998
-
Cygnus donates gcse optimization pass.
- May 15, 1998
-
egcs-1.0.3 released!.
- March 18, 1998
-
egcs-1.0.2 released!.
- February 26, 1998
-
The egcs web pages are now supported by egcs project hardware and
are searchable with webglimpse. The CVS
sources are browsable with the free cvsweb package.
- February 7, 1998
-
Stanford has volunteered to host a high speed mirror for egcs. This
should significantly improve download speeds for releases and snapshots.
Thanks Stanford and Tobin Brockett for the use of their network, disks
and computing facilities!
- January 12, 1998
-
Remote access to CVS sources is available!.
- January 6, 1998
-
egcs-1.0.1 released!.
- December 3, 1997
-
egcs-1.0 released!.
- August 15, 1997
-
The egcs project is announced publicly
and the first
snapshot
is put on-line.