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freebsd-src/contrib/gcc/NEWS
David E. O'Brien 843b04fb90 Virgin import of the GCC 2.95.3 compilers
2001-03-19 19:46:16 +00:00

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This file contains information about GCC releases which has been
generated automatically from the online release notes. This file
covers releases of GCC (and the former EGCS project) since EGCS 1.0,
on the line of development that led to GCC 3; for information on GCC
2.8.1 and older releases of GCC 2, see ONEWS.
======================================================================
http://gcc.gnu.org/gcc-2.95/gcc-2.95.3.html
GCC 2.95.3
March 16, 2001
The GNU project and the GCC developers are pleased to announce the
release of GCC version 2.95.3. GCC used to stand for the GNU C
Compiler, but since the compiler supports several other languages
aside from C, it now stands for the GNU Compiler Collection.
This is a minor release to address several bugs in the [1]GCC version
2.95.2 release.
* Generic bugfixes and improvements
+ Fix numerous problems that caused incorrect optimization in
the register reloading code.
+ Fix numerous problems that caused incorrect optimization in
the loop optimizer.
+ Fix aborts in the functions build_insn_chain and scan_loops
under some circumstances.
+ Fix an alias analysis bug.
+ Fix an infinite compilation bug in the combiner.
+ A few problems with complex number support have been fixed.
+ It is no longer possible for gcc to act as a fork bomb when
installed incorrectly.
+ The -fpack-struct option should be recognized now.
+ Fixed a bug that caused incorrect code to be generated due to
a lost stack adjustment.
* Platform specific bugfixes and improvements
+ Support building ARM toolchains hosted on Windows.
+ Fix attribute calculations in ARM toolchains.
+ arm-linux support has been improved.
+ Fix a PIC failure on sparc targets.
+ On ix86 targets, the regparm attribute should now work
reliably.
+ Several updates for the h8300 port.
The whole suite has been extensively [2]regression tested and
[3]package tested. It should be reliable and suitable for widespread
use.
The GCC 2.95 release has several new optimizations, new targets, new
languages and other new features as compared to EGCS 1.1 or GCC 2.8.
See the [4]new features page for a more complete list of new features
found in the GCC 2.95 releases.
The sources include installation instructions in both HTML and
plaintext forms in the install directory in the distribution. However,
the most up to date [5]installation instructions and [6]build/test
status are on the web pages. We will update those pages as new
information becomes available.
The GCC developers would like to thank the numerous people that have
contributed new features, test results, bugfixes, etc to GCC. This
[7]amazing group of volunteers is what makes GCC successful.
And finally, we can't in good conscience fail to mention some
[8]caveats to using GCC 2.95.3.
Download GCC 2.95.3 from the [9]GNU FTP server (ftp://ftp.gnu.org)
Download GCC 2.95.3 from the [10]GCC FTP server (ftp://gcc.gnu.org)
[11]Find a GNU mirror site
[12]Find a GCC mirror site
For additional information about GCC please see the [13]GCC project
web server or contact the [14]GCC development mailing list.
_________________________________________________________________
[15]The GCC team
Last modified 2001-03-16
References
1. http://gcc.gnu.org/gcc-2.95/gcc-2.95.2.html
2. http://gcc.gnu.org/gcc-2.95/regress.html
3. http://gcc.gnu.org/gcc-2.95/othertest.html
4. http://gcc.gnu.org/gcc-2.95/features.html
5. http://gcc.gnu.org/install/index.html
6. http://gcc.gnu.org/gcc-2.95/buildstat.html
7. http://gcc.gnu.org/thanks.html
8. http://gcc.gnu.org/gcc-2.95/caveats.html
9. ftp://ftp.gnu.org/pub/gnu/gcc/
10. ftp://gcc.gnu.org/pub/gcc/releases/index.html
11. http://www.gnu.org/order/ftp.html
12. http://gcc.gnu.org/mirrors.html
13. http://gcc.gnu.org/index.html
14. mailto:gcc@gcc.gnu.org
15. http://gcc.gnu.org/about.html
======================================================================
http://gcc.gnu.org/gcc-2.95/gcc-2.95.2.html
GCC 2.95.2
October 27, 1999
The GNU project and the GCC developers are pleased to announce the
release of GCC version 2.95.2. GCC used to stand for the GNU C
Compiler, but since the compiler supports several other languages
aside from C, it now stands for the GNU Compiler Collection.
This is a minor release to address several bugs in the GCC version
2.95.1 release.
The -fstrict-aliasing is not enabled by default for GCC 2.95.2. While
the optimizations performed by -fstrict-aliasing are valid according
to the C and C++ standards, the optimization have caused some
problems, particularly with old non-conforming code.
The GCC developers are experimenting with ways to warn users about
code which violates the C/C++ standards, but those warnings are not
ready for widespread use at this time. Rather than wait for those
warnings the GCC developers have chosen to disable -fstrict-aliasing
by default for the GCC 2.95.2 release.
We strongly encourage developers to find and fix code which violates
the C/C++ standards as -fstrict-aliasing may be enabled by default in
future releases. Use the option -fstrict-aliasing to re-enable these
optimizations.
* Generic bugfixes and improvements
+ Fix incorrectly optimized memory reference in global common
subexpression elimination (GCSE) optimization pass.
+ Fix code generation bug in regmove.c in which it could
incorrectly change a "const" value.
+ Fix bug in optimization of conditionals involving volatile
memory references.
+ Avoid over-allocation of stack space for some procedures.
+ Fixed bug in the compiler which caused incorrect optimization
of an obscure series of bit manipulations, shifts and
arithmetic.
+ Fixed register allocator bug which caused teTeX to be
mis-compiled on Sparc targets.
+ Avoid incorrect optimization of degenerate case statements
for certain targets such as the ARM.
+ Fix out of range memory reference in the jump optimizer.
+ Avoid dereferencing null pointer in fix-header.
+ Fix test for GCC specific features so that it is possible to
bootstrap with gcc-2.6.2 and older versions of GCC.
+ Fix typo in scheduler which could potentially cause out of
range memory accesses.
+ Avoid incorrect loop reversal which caused incorrect code for
certain loops on PowerPC targets.
+ Avoid incorrect optimization of switch statements on certain
targets (for example the ARM).
* Platform specific bugfixes and improvements
+ Work around bug in Sun V5.0 compilers which caused bootstrap
comparison failures on Sparc targets.
+ Fix Sparc backend bug which caused aborts in final.c.
+ Fix sparc-hal-solaris2* configuration fragments.
+ Fix bug in sparc block profiling.
+ Fix obscure code generation bug for the PARISC targets.
+ Define __STDC_EXT__ for HPUX configurations.
+ Various POWERPC64 code generation bugfixes.
+ Fix abort for PPC targets using ELF (ex GNU/Linux).
+ Fix collect2 problems for AIX targets.
+ Correct handling of .file directive for PPC targets.
+ Fix bug in fix_trunc x86 patterns.
+ Fix x86 port to correctly pop the FP stack for functions that
return structures in memory.
+ Fix minor bug in strlen x86 pattern.
+ Use stabs debugging instead of dwarf1 for x86-solaris
targets.
+ Fix template repository code to handle leading underscore in
mangled names.
+ Fix weak/weak alias support for OpenBSD.
+ GNU/Linux for the ARM has C++ compatible include files.
* Language & Runtime specific fixes.
+ Fix handling of constructor attribute in the C front-end
which caused problems building the Chill runtime library on
some targets.
+ Fix minor problem merging type qualifiers in the C front-end.
+ Fix aliasing bug for pointers and references (C/C++).
+ Fix incorrect "non-constant initializer bug" when
-traditional or -fwritable-strings is enabled.
+ Fix build error for Chill front-end on SunOS.
+ Do not complain about duplicate instantiations when using
-frepo (C++)
+ Fix array bounds handling in C++ front-end which caused
problems with dwarf debugging information in some
circumstances.
+ Fix minor namespace problem.
+ Fix problem linking java programs.
The whole suite has been extensively [1]regression tested and
[2]package tested. It should be reliable and suitable for widespread
use.
The GCC 2.95 release has several new optimizations, new targets, new
languages and other new features as compared to EGCS 1.1 or GCC 2.8.
See the [3]new features page for a more complete list of new features
found in the GCC 2.95 releases.
The sources include installation instructions in both HTML and
plaintext forms in the install directory in the distribution. However,
the most up to date [4]installation instructions and [5]build/test
status are on the web pages. We will update those pages as new
information becomes available.
The GCC developers would like to thank the numerous people that have
contributed new features, test results, bugfixes, etc to GCC. This
[6]amazing group of volunteers is what makes GCC successful.
And finally, we can't in good conscience fail to mention some
[7]caveats to using GCC 2.95.2.
Download GCC 2.95.2 from the [8]GNU FTP server (ftp://ftp.gnu.org)
Download GCC 2.95.2 from the [9]GCC/EGCS FTP server
(ftp://gcc.gnu.org)
[10]Find a GNU mirror site
[11]Find a GCC/EGCS mirror site
For additional information about GCC please see the [12]GCC project
web server or contact the [13]GCC development mailing list.
_________________________________________________________________
[14]The GCC team
Last modified 2001-02-12
References
1. http://gcc.gnu.org/gcc-2.95/regress.html
2. http://gcc.gnu.org/gcc-2.95/othertest.html
3. http://gcc.gnu.org/gcc-2.95/features.html
4. http://gcc.gnu.org/install/index.html
5. http://gcc.gnu.org/gcc-2.95/buildstat.html
6. http://gcc.gnu.org/thanks.html
7. http://gcc.gnu.org/gcc-2.95/caveats.html
8. ftp://ftp.gnu.org/pub/gnu/gcc/
9. ftp://gcc.gnu.org/pub/gcc/releases/index.html
10. http://www.gnu.org/order/ftp.html
11. http://gcc.gnu.org/mirrors.html
12. http://gcc.gnu.org/index.html
13. mailto:gcc@gcc.gnu.org
14. http://gcc.gnu.org/about.html
======================================================================
http://gcc.gnu.org/gcc-2.95/gcc-2.95.1.html
GCC 2.95.1
August 19, 1999
The GNU project and the GCC/EGCS developers are pleased to announce
the release of GCC version 2.95.1. GCC used to stand for the GNU C
Compiler, but since the compiler supports several other languages
aside from C, it now stands for the GNU Compiler Collection.
This is a minor release to address several bugs in the GCC version
2.95 release.
* Generic bugfixes and improvements
+ Various documentation fixes related to the GCC/EGCS merger.
+ Fix memory management bug which could lead to spurious
aborts, core dumps or random parsing errors in the compiler.
+ Fix a couple bugs in the dwarf1 and dwarf2 debug record
support.
+ Fix infinite loop in the CSE optimizer.
+ Avoid undefined behavior in compiler FP emulation code
+ Fix install problem when prefix is overridden on the make
install command.
+ Fix problem with unwanted installation of assert.h on some
systems.
+ Fix problem with finding the wrong assembler in a single tree
build.
+ Avoid increasing the known alignment of a register that is
already known to be a pointer.
* Platform specific bugfixes and improvements
+ Codegen bugfix for prologue/epilogue for cpu32 target.
+ Fix long long code generation bug for the Coldfire target.
+ Fix various aborts in the SH compiler.
+ Fix bugs in libgcc support library for the SH.
+ Fix alpha ev6 code generation bug.
+ Fix problems with EXIT_SUCCESS/EXIT_FAILURE redefinitions on
AIX platforms.
+ Fix -fpic code generation bug for rs6000/ppc svr4 targets.
+ Fix varargs/stdarg code generation bug for rs6000/ppc svr4
targets.
+ Fix weak symbol handling for rs6000/ppc svr4 targets.
+ Fix various problems with 64bit code generation for the
rs6000/ppc port.
+ Fix codegen bug which caused tetex to be mis-compiled on the
x86
+ Fix compiler abort in new cfg code exposed by x86 port.
+ Fix out of range array reference in code convert flat
registers to the x87 stacked FP register file.
+ Fix minor vxworks configuration bug
+ Fix return type of bsearch for SunOS 4.x.
* Language & Runtime specific fixes.
+ The G++ signature extension has been deprecated. It will be
removed in the next major release of G++. Use of signatures
will result in a warning from the compiler.
+ Several bugs relating to templates and namespaces were fixed.
+ A bug that caused crashes when combining templates with -g on
DWARF1 platforms was fixed.
+ Pointers-to-members, virtual functions, and multiple
inheritance should now work together correctly.
+ Some code-generation bugs relating to function try blocks
were fixed.
+ G++ is a little bit more lenient with certain archaic
constructs than in GCC 2.95.
+ Fix to prevent shared library version #s from bring truncated
to 1 digit
+ Fix missing std:: in the libstdc++ library.
+ Fix stream locking problems in libio.
+ Fix problem in java compiler driver.
The whole suite has been extensively [1]regression tested and
[2]package tested. It should be reliable and suitable for widespread
use.
The compiler has several new optimizations, new targets, new languages
and other new features. See the [3]new features page for a more
complete list of new features found in the GCC 2.95 releases.
The sources include installation instructions in both HTML and
plaintext forms in the install directory in the distribution. However,
the most up to date [4]installation instructions and [5]build/test
status are on the web pages. We will update those pages as new
information becomes available.
The GCC developers would like to thank the numerous people that have
contributed new features, test results, bugfixes, etc to GCC. This
[6]amazing group of volunteers is what makes GCC successful.
And finally, we can't in good conscience fail to mention some
[7]caveats to using GCC 2.95.1.
Download GCC 2.95.1 from the [8]GNU FTP server (ftp://ftp.gnu.org)
Download GCC 2.95.1 from the [9]GCC/EGCS FTP server
(ftp://go.cygnus.com)
[10]Find a GNU mirror site
[11]Find a GCC/EGCS mirror site
For additional information about GCC please see the [12]GCC project
web server or contact the [13]GCC development mailing list.
_________________________________________________________________
[14]The GCC team
Last modified 2001-02-12
References
1. http://gcc.gnu.org/gcc-2.95/regress.html
2. http://gcc.gnu.org/gcc-2.95/othertest.html
3. http://gcc.gnu.org/gcc-2.95/features.html
4. http://gcc.gnu.org/install/index.html
5. http://gcc.gnu.org/gcc-2.95/buildstat.html
6. http://gcc.gnu.org/thanks.html
7. http://gcc.gnu.org/gcc-2.95/caveats.html
8. ftp://ftp.gnu.org/pub/gnu/gcc/
9. ftp://go.cygnus.com/pub/sourceware.cygnus.com/pub/egcs/releases/index.html
10. http://www.gnu.org/order/ftp.html
11. http://gcc.gnu.org/mirrors.html
12. http://gcc.gnu.org/index.html
13. mailto:gcc@gcc.gnu.org
14. http://gcc.gnu.org/about.html
======================================================================
http://gcc.gnu.org/gcc-2.95/gcc-2.95.html
GCC 2.95
July 31, 1999
The GNU project and the GCC/EGCS developers are pleased to announce
the release of GCC version 2.95. GCC used to stand for the GNU C
Compiler, but since the compiler supports several other languages
aside from C, it now stands for the GNU Compiler Collection.
This is the first release of GCC since the April 1999 GCC/EGCS
reunification and includes nearly a year's worth of new development
and bugfixes.
The whole suite has been extensively [1]regression tested and
[2]package tested. It should be reliable and suitable for widespread
use.
The compiler has several new optimizations, new targets, new languages
and other new features. See the [3]new features page for a more
complete list of new features found in the GCC 2.95 releases.
The sources include installation instructions in both HTML and
plaintext forms in the install directory in the distribution. However,
the most up to date [4]installation instructions and [5]build/test
status are on the web pages. We will update those pages as new
information becomes available.
The GCC developers would like to thank the numerous people that have
contributed new features, test results, bugfixes, etc to GCC. This
[6]amazing group of volunteers is what makes GCC successful.
And finally, we can't in good conscience fail to mention some
[7]caveats to using GCC 2.95.
Download GCC 2.95 from the [8]GNU FTP server (ftp://ftp.gnu.org)
Download GCC 2.95 from the [9]GCC/EGCS FTP server
(ftp://go.cygnus.com)
[10]Find a GNU mirror site
[11]Find a GCC/EGCS mirror site
For additional information about GCC please see the [12]GCC project
web server or contact the [13]GCC development mailing list.
_________________________________________________________________
[14]The GCC team
Last modified 2001-02-12
References
1. http://gcc.gnu.org/gcc-2.95/regress.html
2. http://gcc.gnu.org/gcc-2.95/othertest.html
3. http://gcc.gnu.org/gcc-2.95/features.html
4. http://gcc.gnu.org/install/index.html
5. http://gcc.gnu.org/gcc-2.95/buildstat.html
6. http://gcc.gnu.org/thanks.html
7. http://gcc.gnu.org/gcc-2.95/caveats.html
8. ftp://ftp.gnu.org/pub/gnu/gcc/
9. ftp://go.cygnus.com/pub/sourceware.cygnus.com/pub/egcs/releases/index.html
10. http://www.gnu.org/order/ftp.html
11. http://gcc.gnu.org/mirrors.html
12. http://gcc.gnu.org/index.html
13. mailto:gcc@gcc.gnu.org
14. http://gcc.gnu.org/about.html
======================================================================
http://gcc.gnu.org/gcc-2.95/features.html
GCC 2.95 New Features
* General Optimizer Improvements:
+ [1]Localized register spilling to improve speed and code
density especially on small register class machines.
+ [2]Global CSE using lazy code motion algorithms.
+ [3]Improved global constant/copy propagation.
+ [4]Improved control flow graph analysis and manipulation.
+ [5]Local dead store elimination.
+ [6]Memory Load hoisting/store sinking in loops.
+ [7]Type based alias analysis is enabled by default. Note this
feature will expose bugs in the Linux kernel. Please refer to
the [8]FAQ for additional information on this issue.
+ Major revamp of GIV detection, combination and simplification
to improve loop performance.
+ Major improvements to register allocation and reloading.
* New Languages and Language specific improvements
+ [9]Many C++ improvements.
+ [10]Many Fortran improvements.
+ [11]Java front-end has been integrated. A [12]runtime library
is available separately.
+ [13]ISO C99 support
+ [14]Chill front-end and runtime has been integrated.
+ Boehm garbage collector support in libobjc.
+ More support for various pragmas which appear in vendor
include files
* New Targets and Target Specific Improvements
+ [15]Sparc backend rewrite.
+ -mschedule=8000 will optimize code for PA8000 class
processors; -mpa-risc-2-0 will generate code for PA2.0
processors
+ Various micro-optimizations for the ia32 port. K6
optimizations
+ Compiler will attempt to align doubles in the stack on the
ia32 port
+ Alpha EV6 support
+ PowerPC 750
+ RS6000/PowerPC: -mcpu=401 was added as an alias for
-mcpu=403. -mcpu=e603e was added to do -mcpu=603e and
-msoft-float.
+ c3x, c4x
+ HyperSparc
+ SparcLite86x
+ sh4
+ Support for new systems (OpenBSD, FreeBSD, UWIN, Interix,
arm-linux)
+ vxWorks targets include support for vxWorks threads
+ StrongARM 110 and ARM9 support added. ARM Scheduling
parameters rewritten.
+ Various changes to the MIPS port to avoid assembler macros,
which
+ Various performance improvements to the i960 port.
+ Major rewrite of ns32k port in turn improves performance
* Other significant improvements
+ [16]Ability to dump cfg information and display it using vcg.
+ The new faster scheme for fixing vendor header files is
enabled by default.
+ Experimental internationalization support.
+ multibyte character support
+ Some compile-time speedups for pathological problems
+ Better support for complex types
* Plus the usual mountain of bugfixes
* Core compiler is based on the gcc2 development tree from Sept 30,
1998, so we have all of the [17]features found in GCC 2.8.
_________________________________________________________________
[18]The GCC team
Last modified 2001-02-12
References
1. http://gcc.gnu.org/news/spill.html
2. http://gcc.gnu.org/news/lcm.html
3. http://gcc.gnu.org/news/cprop.html
4. http://gcc.gnu.org/news/cfg.html
5. http://gcc.gnu.org/news/dse.html
6. http://gcc.gnu.org/news/hoist.html
7. http://gcc.gnu.org/news/alias.html
8. http://gcc.gnu.org/fom_serv/cache/24.html
9. http://gcc.gnu.org/gcc-2.95/c++features.html
10. http://gcc.gnu.org/onlinedocs/g77_news.html
11. http://sources.redhat.com/java/gcj-announce.txt
12. http://gcc.gnu.org/javaannounce.html
13. http://gcc.gnu.org/c99status.html
14. http://gcc.gnu.org/news/chill.html
15. http://gcc.gnu.org/news/sparc.html
16. http://gcc.gnu.org/news/egcs-vcg.html
17. http://gcc.gnu.org/egcs-1.0/features-2.8.html
18. http://gcc.gnu.org/about.html
======================================================================
http://gcc.gnu.org/gcc-2.95/caveats.html
GCC 2.95 Caveats
* GCC 2.95 will issue an error for invalid asm statements that had
been silently accepted by earlier versions of the compiler. This
is particularly noticeable when compiling older versions of the
Linux kernel (2.0.xx). Please refer to the [1]FAQ for more
information on this issue.
* GCC 2.95 implements type based alias analysis to disambiguate
memory references. Some programs, particularly the Linux kernel
violate ANSI/ISO aliasing rules and therefore may not operate
correctly when compiled with GCC 2.95. Please refer to the [2]FAQ
for more information on this issue.
* GCC 2.95 has a known bug in its handling of complex variables for
64bit targets. Instead of silently generating incorrect code, GCC
2.95 will issue a fatal error for situations it can not handle.
This primarily affects the Fortran community as Fortran makes more
use of complex variables than C or C++.
* GCC 2.95 has an integrated libstdc++, but does not have an
integrated libg++. Furthermore old libg++ releases will not work
with GCC 2.95. You can retrieve a recent copy of libg++ from the
[3]GCC ftp server.
Note most C++ programs only need libstdc++.
* Exception handling may not work with shared libraries,
particularly on alphas, hppas, rs6000/powerpc and mips based
platforms. Exception handling is known to work on x86 GNU/Linux
platforms with shared libraries.
* In general, GCC 2.95 is more rigorous about rejecting invalid C++
code or deprecated C++ constructs than G++ 2.7, G++ 2.8, EGCS 1.0,
or EGCS 1.1. As a result it may be necessary to fix C++ code
before it will compile with GCC 2.95.
* G++ is also converting toward the ISO C++ standard; as a result
code which was previously valid (and thus accepted by other
compilers and older versions of g++) may no longer be accepted.
The flag -fpermissive may allow some non-conforming code to
compile with GCC 2.95.
* GCC 2.95 compiled C++ code is not binary compatible with EGCS
1.1.x, EGCS 1.0.x or GCC 2.8.x.
* GCC 2.95 does not have changes from the GCC 2.8 tree that were
made between Sept 30, 1998 and April 30, 1999 (the official end of
the GCC 2.8 project). Future GCC releases will include all the
changes from the defunct GCC 2.8 sources.
_________________________________________________________________
[4]The GCC team
Last modified 2001-02-12
References
1. http://gcc.gnu.org/faq.html#asmclobber
2. http://gcc.gnu.org/fom_serv/cache/24.html
3. ftp://gcc.gnu.org/pub/gcc/infrastructure/libg++-2.8.1.3.tar.gz
4. http://gcc.gnu.org/about.html
======================================================================
http://gcc.gnu.org/egcs-1.1/egcs-1.1.2.html
EGCS 1.1.2
March 15, 1999
We are pleased to announce the release of EGCS 1.1.2.
EGCS is a collaborative effort involving several groups of hackers
using an open development model to accelerate development and testing
of GNU compilers and runtime libraries.
EGCS 1.1.2 is a minor update to the EGCS 1.1.1 compiler to fix several
serious problems in EGCS 1.1.1.
* General improvements and fixes
+ Fix bug in loop optimizer which caused the SPARC (and
potentially other) ports to segfault.
+ Fix infinite recursion in alias analysis and combiner code.
+ Fix bug in regclass preferencing.
+ Fix incorrect loop reversal which caused incorrect code to be
generated for several targets.
+ Fix return value for builtin memcpy.
+ Reduce compile time for certain loops which exposed quadratic
behavior in the loop optimizer.
+ Fix bug which caused volatile memory to be written multiple
times when only one write was needed/desired.
+ Fix compiler abort in caller-save.c
+ Fix combiner bug which caused incorrect code generation for
certain division by constant operations.
+ Fix incorrect code generation due to a bug in range check
optimizations.
+ Fix incorrect code generation due to mis-handling of
clobbered values in CSE.
+ Fix compiler abort/segfault due to incorrect register
splitting when unrolling loops.
+ Fix code generation involving autoincremented addresses with
ternary operators.
+ Work around bug in the scheduler which caused qt to be
mis-compiled on some platforms.
+ Fix code generation problems with -fshort-enums.
+ Tighten security for temporary files.
+ Improve compile time for codes which make heavy use of
overloaded functions.
+ Fix multiply defined constructor/destructor symbol problems.
+ Avoid setting bogus RPATH environemnt variable during
bootstrap.
+ Avoid GNU-make dependencies in the texinfo subdir.
+ Install CPP wrapper script in $(prefix)/bin if --enable-cpp.
--enable-cpp= can be used to specify an additional install
directory for the cpp wrapper script.
+ Fix CSE bug which caused incorrect label-label refs to appear
on some platforms.
+ Avoid linking in EH routines from libgcc if they are not
needed.
+ Avoid obscure bug in aliasing code.
+ Fix bug in weak symbol handling.
* Platform-specific improvements and fixes
+ Fix detection of PPro/PII on Unixware 7.
+ Fix compiler segfault when building spec99 and other programs
for SPARC targets.
+ Fix code-generation bugs for integer and floating point
conditional move instructions on the PPro/PII.
+ Use fixincludes to fix byteorder problems on i?86-*-sysv.
+ Fix build failure for the arc port.
+ Fix floating point format configuration for i?86-gnu port
+ Fix problems with hppa1.0-hp-hpux10.20 configuration when
threads are enabled
+ Fix coldfire code generation bugs.
+ Fix "unrecognized insn" problems for Alpha and PPC ports.
+ Fix h8/300 code generation problem with floating point values
in memory.
+ Fix unrecognized insn problems for the m68k port.
+ Fix namespace-pollution problem for the x86 port.
+ Fix problems with old assembler on x86 NeXT systems.
+ Fix PIC code-generation problems for the SPARC port.
+ Fix minor bug with LONG_CALLS in PowerPC SVR4 support.
+ Fix minor ISO namespace violation in Alpha varargs/stdarg
support.
+ Fix incorrect "braf" instruction usage for the SH port.
+ Fix minor bug in va-sh which prevented its use with -ansi.
+ Fix problems recognizing and supporting FreeBSD.
+ Handle OpenBSD systems correctly.
+ Minor fixincludes fix for Digital UNIX 4.0B.
+ Fix problems with ctors/dtors in SCO shared libraries.
+ Abort instead of generating incorrect code for PPro/PII
floating point conditional moves.
+ Avoid multiply defined symbols on Linux/GNU systems using
libc-5.4.xx.
+ Fix abort in alpha compiler.
Fortran-specific fixes
* Fix the IDate intrinsic (VXT) (in libg2c) so the returned year is
in the documented, non-Y2K-compliant range of 0-99, instead of
being returned as 100 in the year 2000.
* Fix the `Date_and_Time' intrinsic (in libg2c) to return the
milliseconds value properly in Values(8).
* Fix the `LStat' intrinsic (in libg2c) to return device-ID
information properly in SArray(7).
An important goal of EGCS is to allow wide scale testing of new
features and optimizations which are still under development. However,
EGCS has been carefully tested and should be comparable in quality to
most gcc releases.
EGCS 1.1.2 is based on the June 6, 1998 snapshot of the GCC 2.8
development sources; it contains all of the new features found in GCC
2.8.1 as well as all new development from gcc2 up to June 6, 1998.
See the [1]new features page for a more complete list of new features
found in EGCS 1.1 releases.
The EGCS 1.1.2 release includes installation instructions in both HTML
and plaintext forms (see the INSTALL directory in the toplevel
directory of the EGCS 1.1.2 distribution). However, we also keep the
most up to date [2]installation instructions and [3]build/test status
on our web page. We will update those pages as new information becomes
available.
The EGCS project would like to thank the numerous people that have
contributed new features, test results, bugfixes, etc. This [4]amazing
group of volunteers is what makes EGCS successful.
And finally, we can't in good conscience fail to mention some
[5]caveats to using EGCS 1.1.2. [6]Download EGCS 1.1.2 from
egcs.cygnus.com (USA California) -->
[7]Download EGCS 1.1.2 from go.cygnus.com (USA California - High speed
link provided by Stanford)
The EGCS 1.1.2 release is also available on many [8]mirror sites.
_________________________________________________________________
Last modified on July 28, 1999.
References
1. http://gcc.gnu.org/egcs-1.1/features.html
2. http://gcc.gnu.org/install/index.html
3. http://gcc.gnu.org/egcs-1.1/buildstat.html
4. http://gcc.gnu.org/thanks.html
5. http://gcc.gnu.org/egcs-1.1/caveats.html
6. ftp://egcs.cygnus.com/pub/egcs/releases/index.html
7. ftp://go.cygnus.com/pub/sourceware.cygnus.com/pub/egcs/releases/index.html
8. http://gcc.gnu.org/mirrors.html
======================================================================
http://gcc.gnu.org/egcs-1.1/egcs-1.1.1.html
EGCS 1.1.1
December 1, 1998
We are pleased to announce the release of EGCS 1.1.1.
EGCS is a collaborative effort involving several groups of hackers
using an open development model to accelerate development and testing
of GNU compilers and runtime libraries.
EGCS 1.1.1 is a minor update to the EGCS 1.1 compiler to fix several
serious problems in EGCS 1.1.
* General improvements and fixes
+ Avoid some stack overflows when compiling large functions.
+ Avoid incorrect loop invariant code motions.
+ Fix some core dumps on Linux kernel code.
+ Bring back the imake -Di386 and friends fix from EGCS 1.0.2.
+ Fix code generation problem in gcse.
+ Various documentation related fixes.
* g++/libstdc++ improvements and fixes
+ MT safe EH fix for setjmp/longjmp based exception handling.
+ Fix a few bad interactions between optimization and exception
handling.
+ Fixes for demangling of template names starting with "__".
+ Fix a bug that would fail to run destructors in some cases
with -O2.
+ Fix 'new' of classes with virtual bases.
+ Fix crash building Qt on the Alpha.
+ Fix failure compiling WIFEXITED macro on GNU/Linux.
+ Fix some -frepo failures.
* g77 and libf2c improvements and fixes
+ Various documentation fixes.
+ Avoid compiler crash on RAND intrinsic.
+ Fix minor bugs in makefiles exposed by BSD make programs.
+ Define _XOPEN_SOURCE for libI77 build to avoid potential
problems on some 64-bit systems.
+ Fix problem with implicit endfile on rewind.
+ Fix spurious recursive I/O errors.
* platform specific improvements and fixes
+ Match all versions of UnixWare7.
+ Do not assume x86 SVR4 or UnixWare targets can handle stabs
+ Fix PPC/RS6000 LEGITIMIZE_ADDRESS macro and bug in conversion
from unsigned ints to double precision floats.
+ Fix ARM ABI issue with NetBSD.
+ Fix a few arm code generation bugs.
+ Fixincludes will fix additional broken SCO OpenServer header
files.
+ Fix a m68k backend bug which caused invalid offsets in reg+d
addresses.
+ Fix problems with 64bit AIX 4.3 support.
+ Fix handling of long longs for varargs/stdarg functions on
the ppc.
+ Minor fixes to CPP predefines for Windows.
+ Fix code generation problems with gpr<->fpr copies for 64bit
ppc
+ Fix a few coldfire code generation bugs.
+ Fix some more header file problems on SunOS 4.x
+ Fix assert.h handling for RTEMS.
+ Fix Windows handling of TREE_SYMBOL_REFERENCED.
+ Fix x86 compiler abort in reg-stack pass.
+ Fix cygwin/windows problem with section attributes.
+ Fix Alpha code generation problem exposed by SMP Linux
kernels.
+ Fix typo in m68k 32->64bit integer conversion.
+ Make sure target libraries build with -fPIC for PPC & Alpha
targets.
An important goal of EGCS is to allow wide scale testing of new
features and optimizations which are still under development. However,
EGCS has been carefully tested and should be comparable in quality to
most gcc releases.
EGCS 1.1.1 is based on the June 6, 1998 snapshot of the GCC 2.8
development sources; it contains all of the new features found in GCC
2.8.1 as well as all new development from gcc2 up to June 6, 1998.
See the [1]new features page for a more complete list of new features
found in EGCS 1.1 releases.
The EGCS 1.1.1 release includes installation instructions in both HTML
and plaintext forms (see the INSTALL directory in the toplevel
directory of the EGCS 1.1.1 distribution). However, we also keep the
most up to date [2]installation instructions and [3]build/test status
on our web page. We will update those pages as new information becomes
available.
The EGCS project would like to thank the numerous people that have
contributed new features, test results, bugfixes, etc. This [4]amazing
group of volunteers is what makes EGCS successful.
And finally, we can't in good conscience fail to mention some
[5]caveats to using EGCS 1.1.1.
[6]Download EGCS 1.1.1 from egcs.cygnus.com (USA California)
The EGCS 1.1.1 release is also available on many mirror sites.
[7]Goto mirror list to find a closer site
_________________________________________________________________
Last modified on July 28, 1999.
References
1. http://gcc.gnu.org/egcs-1.1/features.html
2. http://gcc.gnu.org/install/index.html
3. http://gcc.gnu.org/egcs-1.1/buildstat.html
4. http://gcc.gnu.org/thanks.html
5. http://gcc.gnu.org/egcs-1.1/caveats.html
6. ftp://egcs.cygnus.com/pub/egcs/releases/index.html
7. http://gcc.gnu.org/mirrors.html
======================================================================
http://gcc.gnu.org/egcs-1.1/egcs-1.1.html
EGCS 1.1
September 3, 1998
We are pleased to announce the release of EGCS 1.1.
EGCS is a free software project to further the development of the GNU
compilers using an open development environment.
EGCS 1.1 is a major new release of the EGCS compiler system. It has
been [1]extensively tested and is believed to be stable and suitable
for widespread use.
EGCS 1.1 is based on an June 6, 1998 snapshot of the GCC 2.8
development sources; it contains all of the new features found in GCC
2.8.1 as well as all new development from GCC up to June 6, 1998.
EGCS also contains many improvements and features not found in GCC or
in older versions of EGCS.
* Global common subexpression elimination and global constant/copy
propagation (aka [2]gcse)
* Ongoing improvements to the [3]alias analysis support to allow for
better optimizations throughout the compiler.
* Vastly improved [4]C++ compiler and integrated C++ runtime
libraries.
* Fixes for the /tmp symlink race security problems.
* New targets including mips16, arm-thumb and 64 bit PowerPC.
* Improvements to GNU Fortran (g77) compiler and runtime library
made since [5]g77 version 0.5.23.
See the [6]new features page for a more complete list of new features
found in EGCS 1.1 releases.
The EGCS 1.1 release includes installation instructions in both HTML
and plaintext forms (see the INSTALL directory in the toplevel
directory of the EGCS 1.1 distribution). However, we also keep the
most up to date [7]installation instructions and [8]build/test status
on our web page. We will update those pages as new information becomes
available.
The EGCS project would like to thank the numerous people that have
contributed new features, test results, bugfixes, etc. This [9]amazing
group of volunteers is what makes EGCS successful.
And finally, we can't in good conscience fail to mention some
[10]caveats to using EGCS 1.1.
[11]Download EGCS 1.1 from egcs.cygnus.com (USA California)
[12]Download EGCS 1.1 from go.cygnus.com (USA California -- High speed
link provided by Stanford)
The EGCS 1.1 release is also available on many mirror sites.
[13]Goto mirror list to find a closer site
_________________________________________________________________
Last modified on September 4, 1999.
References
1. http://gcc.gnu.org/egcs-1.1/egcs-1.1-test.html
2. http://gcc.gnu.org/news/gcse.html
3. http://gcc.gnu.org/news/alias.html
4. http://gcc.gnu.org/egcs-1.1/c++features.html
5. http://gcc.gnu.org/onlinedocs/g77_news.html
6. http://gcc.gnu.org/egcs-1.1/features.html
7. http://gcc.gnu.org/install/index.html
8. http://gcc.gnu.org/egcs-1.1/buildstat.html
9. http://gcc.gnu.org/thanks.html
10. http://gcc.gnu.org/egcs-1.1/caveats.html
11. ftp://egcs.cygnus.com/pub/egcs/releases/index.html
12. ftp://go.cygnus.com/pub/sourceware.cygnus.com/pub/egcs/releases/index.html
13. http://gcc.gnu.org/mirrors.html
======================================================================
http://gcc.gnu.org/egcs-1.1/features.html
EGCS 1.1 new features
* Integrated GNU Fortran (g77) compiler and runtime library with
improvements, based on [1]g77 version 0.5.23.
* Vast improvements in the C++ compiler; so many they have [2]page
of their own!
* Compiler implements [3]global common subexpression elimination and
global copy/constant propagation.
* More major improvements in the [4]alias analysis code.
* More major improvements in the exception handling code to improve
performance, lower static overhead and provide the infrastructure
for future improvements.
* The infamous /tmp symlink race security problems have been fixed.
* The regmove optimization pass has been nearly completely rewritten
to improve performance of generated code.
* The compiler now recomputes register usage information before
local register allocation. By providing more accurate information
to the priority based allocator, we get better register
allocation.
* The register reloading phase of the compiler optimizes spill code
much better than in previous releases.
* Some bad interactions between the register allocator and
instruction scheduler have been fixed, resulting in much better
code for certain programs. Additionally, we have tuned the
scheduler in various ways to improve performance of generated code
for some architectures.
* The compiler's branch shortening algorithms have been
significantly improved to work better on targets which align jump
targets.
* The compiler now supports -Os to prefer optimizing for code space
over optimizing for code speed.
* The compiler will now totally eliminate library calls which
compute constant values. This primarily helps targets with no
integer div/mul support and targets without floating point
support.
* The compiler now supports an extensive "--help" option.
* cpplib has been greatly improved and may be suitable for limited
use.
* Memory footprint for the compiler has been significantly reduced
for some pathological cases.
* The time to build EGCS has been improved for certain targets
(particularly the alpha and mips platforms).
* Many infrastructure improvements throughout the compiler, plus the
usual mountain of bugfixes and minor improvements.
* Target dependent improvements:
+ SPARC port now includes V8 plus and V9 support as well as
performance tuning for Ultra class machines. The SPARC port
now uses the Haifa scheduler.
+ Alpha port has been tuned for the EV6 processor and has an
optimized expansion of memcpy/bzero. The Alpha port now uses
the Haifa scheduler.
+ RS6000/PowerPC: EGCS 1.1 includes support for the Power64
architecture and aix4.3 support. The RS6000/PowerPC port now
uses the Haifa scheduler.
+ x86: Alignment of static store data and jump targets is per
Intel recommendations now. Various improvements throughout
the x86 port to improve performance on Pentium processors.
Conditional move support has been fixed and enabled for PPro
processors. The x86 port also better supports 64bit
operations now.
+ MIPS has improved multiply/multiply-add support and now
includes mips16 ISA support.
+ M68k has many micro-optimizations and Coldfire fixes.
* Core compiler is based on the GCC development tree from June 9,
1998, so we have all of the [5]features found in GCC 2.8.
[6]Return to the EGCS home page
Last modified: September 4, 1999
References
1. http://gcc.gnu.org/onlinedocs/g77_news.html
2. http://gcc.gnu.org/egcs-1.1/c++features.html
3. http://gcc.gnu.org/news/gcse.html
4. http://gcc.gnu.org/news/alias.html
5. http://gcc.gnu.org/egcs-1.0/features-2.8.html
6. http://gcc.gnu.org/index.html
======================================================================
http://gcc.gnu.org/egcs-1.1/caveats.html
EGCS 1.1 Caveats
* EGCS has an integrated libstdc++, but does not have an integrated
libg++. Furthermore old libg++ releases will not work with EGCS;
HJ Lu has made a [1]libg++ snapshot available which may work with
EGCS.
Note most C++ programs only need libstdc++.
* Exception handling may not work with shared libraries,
particularly on alphas, hppas, rs6000/powerpc and mips based
platforms. Exception handling is known to work on x86-linux
platforms with shared libraries.
* Some versions of the Linux kernel have bugs which prevent them
from being compiled or from running when compiled by EGCS. See
[2]the FAQ for additional information.
* In general, EGCS is more rigorous about rejecting invalid C++ code
or deprecated C++ constructs than g++-2.7, g++-2.8 or EGCS 1.0. As
a result it may be necessary to fix C++ code before it will
compile with EGCS.
* G++ is also converting toward the ISO C++ standard; as a result
code which was previously valid (and thus accepted by other
compilers and older versions of g++) may no longer be accepted.
* EGCS 1.1 compiled C++ code is not binary compatible with EGCS
1.0.x or GCC 2.8.x due to changes necessary to support thread safe
exception handling.
[3]Return to the GCC home page
Last modified: July 28, 1999
References
1. ftp://ftp.yggdrasil.com/private/hjl/libg++-2.8.1.2.tar.gz
2. http://gcc.gnu.org/fom_serv/cache/24.html
3. http://gcc.gnu.org/index.html
======================================================================
http://gcc.gnu.org/egcs-1.0/egcs-1.0.3.html
EGCS 1.0.3
May 15, 1998
We are pleased to announce the release of EGCS 1.0.3.
EGCS is a collaborative effort involving several groups of hackers
using an open development model to accelerate development and testing
of GNU compilers and runtime libraries.
EGCS 1.0.3 is a minor update to the EGCS 1.0.2 compiler to fix a few
problems reported by Red Hat for builds of Red Hat 5.1.
* Generic bugfixes:
+ Fix a typo in the libio library which resulted in incorrect
behavior of istream::get.
+ Fix the Fortran negative array index problem.
+ Fix a major problem with the ObjC runtime thread support
exposed by glibc2.
+ Reduce memory consumption of the Haifa scheduler.
* Target specific bugfixes:
+ Fix one x86 floating point code generation bug exposed by
glibc2 builds.
+ Fix one x86 internal compiler error exposed by glibc2 builds.
+ Fix profiling bugs on the Alpha.
+ Fix ImageMagick & emacs 20.2 build problems on the Alpha.
+ Fix rs6000/ppc bug when converting values from integer types
to floating point types.
An important goal of EGCS is to allow wide scale testing of new
features and optimizations which are still under development. However,
EGCS has been carefully tested and should be comparable in quality to
most GCC releases.
EGCS 1.0.3 is based on an August 2, 1997 snapshot of the GCC 2.8
development sources; it contains nearly all of the new features found
in GCC 2.8.
EGCS also contains many improvements and features not found in GCC 2.7
or GCC 2.8.
* Integrated C++ runtime libraries, including support for most major
GNU/Linux systems!
* The integrated libstdc++ library includes a verbatim copy of
[1]SGI's STL release instead of a modified copy.
* Integrated GNU Fortran compiler
* New instruction scheduler
* New alias analysis code
See the [2]new features page for a more complete list of new features
found in EGCS 1.0.x releases.
The EGCS 1.0.3 release includes installation instructions in both HTML
and plaintext forms (see the INSTALL directory in the toplevel
directory of the EGCS 1.0.3 distribution). However, we also keep the
most up to date [3]installation instructions and [4]build/test status
on our web page. We will update those pages as new information becomes
available.
And, we can't in good conscience fail to mention some [5]caveats to
using EGCS.
Update: Big thanks to Stanford for providing a high speed link for
downloading EGCS (go.cygnus.com)!
[6]Download EGCS 1.0.3 from ftp.cygnus.com (USA California)
[7]Download EGCS 1.0.3 from go.cygnus.com (USA California -- High
speed link provided by Stanford)
The EGCS 1.0.3 release is also available on many mirror sites.
[8]Goto mirror list to find a closer site
We'd like to thank the numerous people that have contributed new
features, test results, bugfixes, etc. Unfortunately, they're far too
numerous to mention by name.
_________________________________________________________________
Last modified on February 22, 1999.
References
1. http://www.sgi.com/Technology/STL
2. http://gcc.gnu.org/egcs-1.0/features.html
3. http://gcc.gnu.org/install/index.html
4. http://gcc.gnu.org/egcs-1.0/buildstat.html
5. http://gcc.gnu.org/egcs-1.0/caveats.html
6. ftp://egcs.cygnus.com/pub/egcs/releases/index.html
7. ftp://go.cygnus.com/pub/sourceware.cygnus.com/pub/egcs/releases/index.html
8. http://gcc.gnu.org/mirrors.html
======================================================================
http://gcc.gnu.org/egcs-1.0/egcs-1.0.2.html
EGCS 1.0.2
March 16, 1998
We are pleased to announce the release of EGCS 1.0.2.
EGCS is a collaborative effort involving several groups of hackers
using an open development model to accelerate development and testing
of GNU compilers and runtime libraries.
EGCS 1.0.2 is a minor update to the EGCS 1.0.1 compiler to fix several
serious problems in EGCS 1.0.1.
* General improvements and fixes
+ Memory consumption significantly reduced, especially for
templates and inline functions.
+ Fix various problems with glibc2.1.
+ Fix loop optimization bug exposed by rs6000/ppc port.
+ Fix to avoid potential code generation problems in jump.c.
+ Fix some undefined symbol problems in dwarf1 debug support.
* g++/libstdc++ improvements and fixes
+ libstdc++ in the EGCS release has been updated and should be
link compatible with libstdc++-2.8.
+ Various fixes in libio/libstdc++ to work better on Linux
systems.
+ Fix problems with duplicate symbols on systems that do not
support weak symbols.
+ Memory corruption bug and undefined symbols in bastring have
been fixed.
+ Various exception handling fixes.
+ Fix compiler abort for very long thunk names.
* g77 improvements and fixes
+ Fix compiler crash for omitted bound in Fortran CASE
statement.
+ Add missing entries to g77 lang-options.
+ Fix problem with -fpedantic in the g77 compiler.
+ Fix "backspace" problem with g77 on alphas.
+ Fix x86 backend problem with Fortran literals and -fpic.
+ Fix some of the problems with negative subscripts for g77 on
alphas.
+ Fixes for Fortran builds on cygwin32/mingw32.
* platform specific improvements and fixes
+ Fix long double problems on x86 (exposed by glibc)
+ x86 ports define i386 again to keep imake happy.
+ Fix exception handling support on NetBSD ports.
+ Several changes to collect2 to fix many problems with AIX.
+ Define __ELF__ for rs6000/linux.
+ Fix -mcall-linux problem on rs6000/linux.
+ Fix stdarg/vararg problem for rs6000/linux.
+ Allow autoconf to select a proper install problem on AIX 3.1.
+ m68k port support includes -mcpu32 option as well as cpu32
multilibs.
+ Fix stdarg bug for irix6.
+ Allow EGCS to build on irix5 without the gnu assembler.
+ Fix problem with static linking on sco5.
+ Fix bootstrap on sco5 with native compiler.
+ Fix for abort building newlib on H8 target.
+ Fix fixincludes handling of math.h on SunOS.
+ Minor fix for motorola 3300 m68k systems.
An important goal of EGCS is to allow wide scale testing of new
features and optimizations which are still under development. However,
EGCS has been carefully tested and should be comparable in quality to
most GCC releases.
EGCS 1.0.2 is based on an August 2, 1997 snapshot of the GCC 2.8
development sources; it contains nearly all of the new features found
in GCC 2.8.
EGCS also contains many improvements and features not found in GCC 2.7
or GCC 2.8.
* Integrated C++ runtime libraries, including support for most major
linux systems!
* The integrated libstdc++ library includes a verbatim copy of
[1]SGI's STL release.
* Integrated GNU Fortran compiler
* New instruction scheduler
* New alias analysis code
See the [2]new features page for a more complete list of new features
found in EGCS 1.0.x releases.
The EGCS 1.0.2 release includes installation instructions in both HTML
and plaintext forms (see the INSTALL directory in the toplevel
directory of the EGCS 1.0.2 distribution). However, we also keep the
most up to date [3]installation instructions and [4]build/test status
on our web page. We will update those pages as new information becomes
available.
And, we can't in good conscience fail to mention some [5]caveats to
using EGCS.
Update: Big thanks to Stanford for providing a high speed link for
downloading EGCS (go.cygnus.com)!
[6]Download EGCS 1.0.2 from ftp.cygnus.com (USA California)
[7]Download EGCS 1.0.2 from go.cygnus.com (USA California -- High
speed link provided by Stanford)
The EGCS 1.0.2 release is also available on many mirror sites.
[8]Goto mirror list to find a closer site
We'd like to thank the numerous people that have contributed new
features, test results, bugfixes, etc. Unfortunately, they're far too
numerous to mention by name.
_________________________________________________________________
Last modified on July 28, 1999.
References
1. http://www.sgi.com/Technology/STL/
2. http://gcc.gnu.org/egcs-1.0/features.html
3. http://gcc.gnu.org/install/index.html
4. http://gcc.gnu.org/egcs-1.0/buildstat.html
5. http://gcc.gnu.org/egcs-1.0/caveats.html
6. ftp://egcs.cygnus.com/pub/egcs/releases/index.html
7. ftp://go.cygnus.com/pub/sourceware.cygnus.com/pub/egcs/releases/index.html
8. http://gcc.gnu.org/mirrors.html
======================================================================
http://gcc.gnu.org/egcs-1.0/egcs-1.0.1.html
EGCS 1.0.1
January 6, 1998
We are pleased to announce the release of EGCS 1.0.1.
EGCS is a collaborative effort involving several groups of hackers
using an open development model to accelerate development and testing
of GNU compilers and runtime libraries.
EGCS 1.0.1 is a minor update to the EGCS 1.0 compiler to fix a few
critical bugs and add support for Red Hat 5.0 Linux. Changes since the
EGCS 1.0 release:
* Add support for Red Hat 5.0 Linux and better support for Linux
systems using glibc2.
Many programs failed to link when compiled with EGCS 1.0 on Red
Hat 5.0 or on systems with newer versions of glibc2. EGCS 1.0.1
should fix these problems.
* Compatability with both EGCS 1.0 and GCC 2.8 libgcc exception
handling interfaces.
To avoid future compatibility problems, we strongly urge anyone
who is planning on distributing shared libraries that contain C++
code to upgrade to EGCS 1.0.1 first.
Soon after EGCS 1.0 was released, the GCC developers made some
incompatible changes in libgcc's exception handling interfaces.
These changes were needed to solve problems on some platforms.
This means that GCC 2.8.0, when released, will not be seamlessly
compatible with shared libraries built by EGCS 1.0. The reason is
that the libgcc.a in GCC 2.8.0 will not contain a function needed
by the old interface.
The result of this is that there may be compatibility problems
with shared libraries built by EGCS 1.0 when used with GCC 2.8.0.
With EGCS 1.0.1, generated code uses the new (GCC 2.8.0)
interface, and libgcc.a has the support routines for both the old
and the new interfaces (so EGCS 1.0.1 and EGCS 1.0 code can be
freely mixed, and EGCS 1.0.1 and GCC 2.8.0 code can be freely
mixed).
The maintainers of GCC 2.x have decided against including seamless
support for the old interface in 2.8.0, since it was never
"official", so to avoid future compatibility problems we recommend
against distributing any shared libraries built by EGCS 1.0 that
contain C++ code (upgrade to 1.0.1 and use that).
* Various bugfixes in the x86, hppa, mips, and rs6000/ppc backends.
The x86 changes fix code generation errors exposed when building
glibc2 and the Linux dynamic linker (ld.so).
The hppa change fixes a compiler abort when configured for use
with RTEMS.
The MIPS changes fix problems with the definition of LONG_MAX on
newer systems, allow for command line selection of the target ABI,
and fix one code generation problem.
The rs6000/ppc change fixes some problems with passing structures
to varargs/stdarg functions.
* A few machine independent bugfixes, mostly to fix code generation
errors when building Linux kernels or glibc.
* Fix a few critical exception handling and template bugs in the C++
compiler.
* Fix Fortran namelist bug on alphas.
* Fix build problems on x86-solaris systems.
An important goal of EGCS is to allow wide scale testing of new
features and optimizations which are still under development. However,
EGCS has been carefully tested and should be comparable in quality to
most GCC releases.
EGCS 1.0.1 is based on an August 2, 1997 snapshot of the GCC 2.8
development sources; it contains nearly all of the new features found
in GCC 2.8.
EGCS also contains many improvements and features not found in GCC 2.7
and even the soon to be released GCC 2.8 compilers.
* Integrated C++ runtime libraries, including support for most major
linux systems!
* The integrated libstdc++ library includes a verbatim copy of
[1]SGI's STL release.
* Integrated GNU Fortran compiler
* New instruction scheduler
* New alias analysis code
See the [2]new features page for a more complete list of new features
found in EGCS 1.0.x releases.
The EGCS 1.0.1 release includes installation instructions in both HTML
and plaintext forms (see the INSTALL directory in the toplevel
directory of the EGCS 1.0.1 distribution). However, we also keep the
most up to date [3]installation instructions and [4]build/test status
on our web page. We will update those pages as new information becomes
available.
And, we can't in good conscience fail to mention some [5]caveats to
using EGCS.
Update: Big thanks to Stanford for providing a high speed link for
downloading EGCS (go.cygnus.com)!
[6]Download EGCS 1.0.1 from ftp.cygnus.com (USA California)
[7]Download EGCS 1.0.1 from go.cygnus.com (USA California -- High
speed link provided by Stanford)
The EGCS 1.0.1 release is also available on many mirror sites.
[8]Goto mirror list to find a closer site
We'd like to thank the numerous people that have contributed new
features, test results, bugfixes, etc. Unfortunately, they're far too
numerous to mention by name.
_________________________________________________________________
Last modified on July 28, 1999.
References
1. http://www.sgi.com/Technology/STL/
2. http://gcc.gnu.org/egcs-1.0/features.html
3. http://gcc.gnu.org/install/index.html
4. http://gcc.gnu.org/egcs-1.0/buildstat.html
5. http://gcc.gnu.org/egcs-1.0/caveats.html
6. ftp://egcs.cygnus.com/pub/egcs/releases/index.html
7. ftp://go.cygnus.com/pub/sourceware.cygnus.com/pub/egcs/releases/index.html
8. http://gcc.gnu.org/mirrors.html
======================================================================
http://gcc.gnu.org/egcs-1.0/egcs-1.0.html
EGCS 1.0
December 3, 1997
We are pleased to announce the release of EGCS 1.0.
EGCS is a collaborative effort involving several groups of hackers
using an open development model to accelerate development and testing
of GNU compilers and runtime libraries.
An important goal of EGCS is to allow wide scale testing of
experimental features and optimizations; therefore, EGCS contains some
features and optimizations which are still under development. However,
EGCS has been carefully tested and should be comparable in quality to
most GCC releases.
EGCS 1.0 is based on an August 2, 1997 snapshot of the GCC 2.8
development sources; it contains nearly all of the new features found
in GCC 2.8.
EGCS 1.0 also contains many improvements and features not found in GCC
2.7 and even the soon to be released GCC 2.8 compilers.
* Integrated C++ runtime libraries, including support for most major
linux systems!
* The integrated libstdc++ library includes a verbatim copy of
[1]SGI's STL release.
* Integrated GNU Fortran compiler
* New instruction scheduler
* New alias analysis code
See the [2]new features page for a more complete list of new features.
The EGCS 1.0 release includes installation instructions in both HTML
and plaintext forms (see the INSTALL directory in the toplevel
directory of the EGCS 1.0 distribution). However, we also keep the
most up to date [3]installation instructions and [4]build/test status
on our web page. We will update those pages as new information becomes
available.
And, we can't in good conscience fail to mention some [5]caveats to
using EGCS.
Update: The T1 into our main California offices has been 100%
saturated since shortly after the release. We've added an EGCS 1.0
mirror at our Massachusetts office to help share the load. We also
encourage folks to use the many mirrors available throughout the
world.
Update: Big thanks to Stanford for providing a high speed link for
downloading EGCS! (go.cygnus.com)
[6]Download EGCS 1.0 from ftp.cygnus.com (USA California)
[7]Download EGCS 1.0 from go.cygnus.com (USA California -- High speed
link provided by Stanford)
The EGCS 1.0 release should be available on most mirror sites by now.
[8]Goto mirror list to find a closer site
We'd like to thank the numerous people that have contributed new
features, test results, bugfixes, etc. Unfortunately, they're far too
numerous to mention by name.
_________________________________________________________________
Last modified on July 28, 1999.
References
1. http://www.sgi.com/Technology/STL
2. http://gcc.gnu.org/egcs-1.0/features.html
3. http://gcc.gnu.org/install/index.html
4. http://gcc.gnu.org/egcs-1.0/buildstat.html
5. http://gcc.gnu.org/egcs-1.0/caveats.html
6. ftp://egcs.cygnus.com/pub/egcs/releases/index.html
7. ftp://go.cygnus.com/pub/sourceware.cygnus.com/pub/egcs/releases/index.html
8. http://gcc.gnu.org/mirrors.html
======================================================================
http://gcc.gnu.org/egcs-1.0/features.html
EGCS 1.0 features
* Core compiler is based on the gcc2 development tree from Aug 2,
1997, so we have most of the [1]features found in GCC 2.8.
* Integrated GNU Fortran compiler based on g77-0.5.22-19970929.
* Vast improvements in the C++ compiler; so many they have [2]page
of their own!
* Integrated C++ runtime libraries, including support for most major
linux systems!
* New instruction scheduler from IBM Haifa which includes support
for function wide instruction scheduling as well as superscalar
scheduling.
* Significantly improved alias analysis code.
* Improved register allocation for two address machines.
* Significant code generation improvements for Fortran code on
Alphas
* Various optimizations from the g77 project as well as improved
loop optimizations.
* Dwarf2 debug format support for some targets.
* egcs libstdc++ includes the SGI STL implementation without
changes.
* As a result of these and other changes, egcs libstc++ is not
binary compatible with previous releases of libstdc++.
* Various new ports -- UltraSPARC, Irix6.2 & Irix6.3 support, The
SCO Openserver 5 family (5.0.{0,2,4} and Internet FastStart 1.0
and 1.1), Support for RTEMS on several embedded targets, Support
for arm-linux, Mitsubishi M32R, Hitachi H8/S, Matsushita MN102 and
MN103, NEC V850, Sparclet, Solaris & Linux on PowerPCs, etc.
* Integrated testsuites for gcc, g++, g77, libstdc++ and libio.
* RS6000/PowerPC ports generate code which can run on all
RS6000/PowerPC variants by default.
* -mcpu= and -march= switches for the x86 port to allow better
control over how the x86 port generates code.
* Includes the template repository patch (aka repo patch); note the
new template code makes repo obsolete for ELF systems using gnu-ld
such as Linux.
* Plus the usual assortment of bugfixes and improvements.
[3]Return to the egcs home page
Last modified: July 28, 1999
References
1. http://gcc.gnu.org/egcs-1.0/features-2.8.html
2. http://gcc.gnu.org/egcs-1.0/c++features.html
3. http://gcc.gnu.org/index.html
======================================================================
http://gcc.gnu.org/egcs-1.0/caveats.html
EGCS 1.0 Caveats
* EGCS has an integrated libstdc++, but does not have an integrated
libg++. Furthermore old libg++ releases will not work with egc; HJ
Lu has made a [1]libg++ snapshot available which may work with
EGCS.
Note most C++ programs only need libstdc++.
* Note that using -pedantic or -Wreturn-type can cause an explosion
in the amount of memory needed for template-heavy C++ code, such
as code that uses STL. Also note that -Wall includes
-Wreturn-type, so if you use -Wall you will need to specify
-Wno-return-type to turn it off.
* Exception handling may not work with shared libraries,
particularly on alphas, hppas, and mips based platforms. Exception
handling is known to work on x86-linux platforms with shared
libraries.
* Some versions of the Linux kernel have bugs which prevent them
from being compiled or from running when compiled by EGCS. See
[2]the FAQ for additional information.
* In general, EGCS is more rigorous about rejecting invalid C++ code
or deprecated C++ constructs than G++ 2.7. As a result it may be
necessary to fix C++ code before it will compile with EGCS.
* G++ is also aggressively tracking the C++ standard; as a result
code which was previously valid (and thus accepted by other
compilers and older versions of G++) may no longer be accepted.
* EGCS 1.0 may not work with Red Hat Linux 5.0 on all targets. EGCS
1.0.x and later releases should work with Red Hat Linux 5.0.
[3]Return to the GCC home page
Last modified: August 27, 1998
References
1. ftp://ftp.yggdrasil.com/private/hjl/libg++-2.8.1.2.tar.gz
2. http://gcc.gnu.org/fom_serv/cache/24.html
3. http://gcc.gnu.org/index.html
======================================================================
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