initial import of GCC 10.4.0 sources.

mostly a large list of PRs fixed (210 total), plus one x86-64
specific change related to MMX and 64 bit integer return.

https://gcc.gnu.org/gcc-10/changes.html

initial import of GCC 10.4.0 sources.

mostly a large list of PRs fixed (210 total), plus one x86-64
specific change related to MMX and 64 bit integer return.

https://gcc.gnu.org/gcc-10/changes.html links to the full list
of PRs fixed.

show more ...

initial import of GCC 10.3.0. main changes include:

caveats:
- ABI issue between c++14 and c++17 fixed
- profile mode is removed from libstdc++
- -fno-common is now the default

new features:
- new

initial import of GCC 10.3.0. main changes include:

caveats:
- ABI issue between c++14 and c++17 fixed
- profile mode is removed from libstdc++
- -fno-common is now the default

new features:
- new flags -fallocation-dce, -fprofile-partial-training,
-fprofile-reproducible, -fprofile-prefix-path, and -fanalyzer
- many new compile and link time optimisations
- enhanced drive optimisations
- openacc 2.6 support
- openmp 5.0 features
- new warnings: -Wstring-compare and -Wzero-length-bounds
- extended warnings: -Warray-bounds, -Wformat-overflow,
-Wrestrict, -Wreturn-local-addr, -Wstringop-overflow,
-Warith-conversion, -Wmismatched-tags, and -Wredundant-tags
- some likely C2X features implemented
- more C++20 implemented
- many new arm & intel CPUs known

hundreds of reported bugs are fixed. full list of changes
can be found at:

https://gcc.gnu.org/gcc-10/changes.html

show more ...

initial import of GCC 9.3.0. changes include:

- live patching support
- shell completion help
- generally better diagnostic output (less verbose/more useful)
- diagnostics and optimisation choices

initial import of GCC 9.3.0. changes include:

- live patching support
- shell completion help
- generally better diagnostic output (less verbose/more useful)
- diagnostics and optimisation choices can be emitted in json
- asan memory usage reduction
- many general, and specific to switch, inter-procedure,
profile and link-time optimisations. from the release notes:
"Overall compile time of Firefox 66 and LibreOffice 6.2.3 on
an 8-core machine was reduced by about 5% compared to GCC 8.3"
- OpenMP 5.0 support
- better spell-guesser
- partial experimental support for c2x and c++2a
- c++17 is no longer experimental
- arm AAPCS GCC 6-8 structure passing bug fixed, may cause
incompatibility (restored compat with GCC 5 and earlier.)
- openrisc support

show more ...

re-import GCC 8.4.0.

import GCC 7.5.0. doing this here so that the vendor branch has
the code we'll merge into gcc.old and the netbsd-9 tree gcc tree.
GCC 8.4.0 will be imported immediately on top of this again,
restori

import GCC 7.5.0. doing this here so that the vendor branch has
the code we'll merge into gcc.old and the netbsd-9 tree gcc tree.
GCC 8.4.0 will be imported immediately on top of this again,
restoring the current status.

these PRs in the GCC bugzilla are fixed with this update:

89869 80693 89795 84272 85593 86669 87148 87647 87895 88103 88107 88563
88870 88976 89002 89187 89195 89234 89303 89314 89354 89361 89403 89412
89512 89520 89590 89621 89663 89679 89704 89734 89872 89933 90090 90208
87075 85870 89009 89242 88167 80864 81933 85890 86608 87145 88857 89024
89119 89214 89511 89612 89705 89400 81740 82186 84552 86554 87609 88105
88149 88415 88739 88903 89135 89223 89296 89505 89572 89677 89698 89710
90006 90020 90071 90328 90474 91126 91162 91812 91887 90075 88998 89945
87047 87506 88074 88656 88740 91137 89008 84010 89349 91136 91347 91995
89397 87030 60702 78884 85594 87649 87725 88181 88470 88553 88568 88588
88620 88644 88906 88949 89246 89587 89726 89768 89796 89998 90108 90756
90950 91704 88825 88983 86538 51333 89446 90220 91308 92143 89392 90213
90278 91131 91200 91510 89037 91481 87673 88418 88938 88948 90547 27221
58321 61250 67183 67958 77583 83531 86215 88648 88720 88726 89091 89466
89629 90105 90329 90585 90760 90924 91087 89222 81956 71861 35031 69455
81849 82993 85798 88138 88155 88169 88205 88206 88228 88249 88269 88376
77703 80260 82077 86248 88393 90786 57048 66089 66695 67679 68009 71723
72714 84394 85544 87734 88298 90937 91557 63891 64132 65342 68649 68717
71066 71860 71935 77746 78421 78645 78865 78983 79485 79540 85953 88326
89651 90744

show more ...

import GCC 8.4. it fixes at least these 210 PRs in GCC bugzilla:

90095 93348 89906 89766 86747 87770 89588 89753 88235 89762 89684 89946
89965 90010 90026 90733 90810 90840 90842 90867 91623 92930

import GCC 8.4. it fixes at least these 210 PRs in GCC bugzilla:

90095 93348 89906 89766 86747 87770 89588 89753 88235 89762 89684 89946
89965 90010 90026 90733 90810 90840 90842 90867 91623 92930 93073 93402
93505 93576 93744 93820 93908 85762 86429 86521 87327 87480 87513 87554
87685 87748 88183 88380 88394 88419 88690 88820 89381 89422 89576 89831
89917 90951 92003 92852 93140 80791 89358 89970 90899 89212 89419 92745
93684 93789 88273 91826 92376 84746 89497 89595 89664 89711 89725 90018
90316 90900 91108 91293 91772 92763 93054 93246 90313 92420 93434 93767
88530 89517 91838 79262 84680 85459 85711 85860 86567 87008 87651 87652
88469 89546 89827 90197 93072 93241 81800 89190 85400 91472 91854 92095
92131 92575 93704 60228 61414 65782 89405 89498 89703 89752 90187 90193
90898 91401 91450 91665 92296 92384 92438 92615 92648 92723 92732 92904
93087 93228 93515 93905 82081 92859 89712 89876 92106 82645 78552 81266
85965 89102 90165 90299 90532 91436 92059 93205 93325 93562 90359 91280
91375 92674 92704 93439 92768 80938 83361 90563 92113 92961 87833 89848
89902 89903 92022 93828 78179 79221 82920 84016 87015 88075 89077 89266
90454 90634 91226 92154 92664 92886 93065 92692 92629 80590 91944 92899
92977 93463 89601 88025 91660 91845 90498 91077 84487 86119 89174 89981
91550 92569 84135 84974 90872 93714

show more ...

import GCC 8.3. it includes these new features:
- many optimisations improved: inter-procedural, profile-directed,
LTO, loops including user-controllable unroll support, and more.
- columns number

import GCC 8.3. it includes these new features:
- many optimisations improved: inter-procedural, profile-directed,
LTO, loops including user-controllable unroll support, and more.
- columns numbers added to line numbers in dwarf
- gcov extended significantly
- many sanitizer updates
- many new warning messages
- many better hints and more useful error messages
- minor ABI changes on x86-64 libstdc++, and some c++17 modes
- draft c++2a features
- better c++17 experimental support
- Armv8.4-A supported, better 8.2-A and 8.3-A support, including
32 bit arm port. cortex a-55, a-75 and a-55.a-75 combo support.
- in the GCC bugzilla, 8.1 shows 1149 bugs fixed, 8.2 shows 100, and
8.3 shows 158.

show more ...

import GCC 7.4.0. main changes include:

The non-standard C++0x type traits has_trivial_default_constructor,
has_trivial_copy_constructor and has_trivial_copy_assign have been
removed.

On ARM targe

import GCC 7.4.0. main changes include:

The non-standard C++0x type traits has_trivial_default_constructor,
has_trivial_copy_constructor and has_trivial_copy_assign have been
removed.

On ARM targets (arm*-*-*), a bug introduced in GCC 5 that affects
conformance to the procedure call standard (AAPCS) has been fixed.

Many optimiser improvements

DWARF-5 support.

Many new and enhanced warnings.

Warnings about format strings now underline the pertinent part of
the string, and can offer suggested fixes.

Several new warnings related to buffer overflows and buffer
truncation.

New __builtin_add_overflow_p, __builtin_sub_overflow_p,
__builtin_mul_overflow_p built-ins added that test for overflow.

The C++ front end has experimental support for all of the current
C++17 draft.

The -fverbose-asm option has been expanded to prints comments
showing the source lines that correspond to the assembly.

The gcc and g++ driver programs will now provide suggestions for
misspelled arguments to command-line options.


AArch64 specific:

GCC has been updated to the latest revision of the procedure call
standard (AAPCS64) to provide support for parameter passing when
data types have been over-aligned.

The ARMv8.2-A and ARMv8.3-A architecture are now supported.

ARM specific:

Support for the ARMv5 and ARMv5E architectures has been
deprecated (which have no known implementations).

A new command-line option -mpure-code has been added. It does not
allow constant data to be placed in code sections.

x86 specific:

Support for the AVX-512 4FMAPS, 4VNNIW, VPOPCNTDQ and Software
Guard Extensions (SGX) ISA extensions has been added.

PPC specific:

GCC now diagnoses inline assembly that clobbers register r2.

RISC-V specific:

Support for the RISC-V instruction set has been added.

SH specific:

Support for SH5/SH64 has been removed.

Support for SH2A has been enhanced.

show more ...

import GCC 6.5.0. this is largely a maint release with no
particularly features listed here:

http://gcc.gnu.org/gcc-6/changes.html

this fixes over 250 PRs in the GCC bugzilla:

https://gcc.g

import GCC 6.5.0. this is largely a maint release with no
particularly features listed here:

http://gcc.gnu.org/gcc-6/changes.html

this fixes over 250 PRs in the GCC bugzilla:

https://gcc.gnu.org/bugzilla/buglist.cgi?bug_status=RESOLVED&resolution=FIXED&target_milestone=6.5

show more ...

import GCC 6.4.0. see this url for details which are too large to
include here:

http://gcc.gnu.org/gcc-6/changes.html

the main visible changes appear to be:

- The default mode for C++ is now -

import GCC 6.4.0. see this url for details which are too large to
include here:

http://gcc.gnu.org/gcc-6/changes.html

the main visible changes appear to be:

- The default mode for C++ is now -std=gnu++14 instead of -std=gnu++98.
- The C and C++ compilers now support attributes on enumerators.
- Diagnostics can now contain "fix-it hints"
- more warnings (some added to -Wall)

show more ...

import GCC 5.3.0. see these urls for details which are too large to
include here:

http://gcc.gnu.org/gcc-4.9/changes.html
http://gcc.gnu.org/gcc-5/changes.html

(note that GCC 5.x is a release st

import GCC 5.3.0. see these urls for details which are too large to
include here:

http://gcc.gnu.org/gcc-4.9/changes.html
http://gcc.gnu.org/gcc-5/changes.html

(note that GCC 5.x is a release stream like GCC 4.9.x, 4.8.x, etc.)


the main issues we will have are:

The default mode for C is now -std=gnu11 instead of -std=gnu89.

ARM:
The deprecated option -mwords-little-endian has been removed.
The options -mapcs, -mapcs-frame, -mtpcs-frame and -mtpcs-leaf-frame
which are only applicable to the old ABI have been deprecated.

MIPS:
The o32 ABI has been modified and extended. The o32 64-bit
floating-point register support is now obsolete and has been removed.
It has been replaced by three ABI extensions FPXX, FP64A, and FP64.
The meaning of the -mfp64 command-line option has changed. It is now
used to enable the FP64A and FP64 ABI extensions.

show more ...

initial import of GCC 4.8.5 sources. these GCC PRs (at least) are
fixed in this release:

64882 46102 58123 65409 59626 61058 65680 64487 65721 65727
52306 64768 56273 57653 59990 60656 61634 63844

initial import of GCC 4.8.5 sources. these GCC PRs (at least) are
fixed in this release:

64882 46102 58123 65409 59626 61058 65680 64487 65721 65727
52306 64768 56273 57653 59990 60656 61634 63844 64199 64493
64495 65549 57059 57569 57748 58369 62642 63608 64037 65550
65693 65220 45187 64409 61977 64513 64634 65368 66233 66470
65072 65327 65543 65279 63593 65063 65518 66123 66140 59016
64479 64557 64979 66215 66275 66481 39423 64766 63733 52714
60898 61138 63744 57023 39722 45402 52579 52664 60718 62044
59513 35330 37440 43701

see:
https://gcc.gnu.org/bugzilla/buglist.cgi?bug_status=RESOLVED&resolution=FIXED&target_milestone=4.8.5
for more details.

show more ...

initial import of GCC 4.8 snapshot 2014-10-09. this fixes at
least the below GCC PRs, among many other changes.

it also makes sh3 reasonably useful again.

c++/60731
c/61271
c/61271
c/61271
de

initial import of GCC 4.8 snapshot 2014-10-09. this fixes at
least the below GCC PRs, among many other changes.

it also makes sh3 reasonably useful again.

c++/60731
c/61271
c/61271
c/61271
debug/55794
debug/60655
debug/61923
debug/63284
debug/63342
inline-asm/63282
ipa/61986
ipa/62015
libobjc/61920
libobjc/61920
libstdc++/58962
libstdc++/60734
libstdc++/60966
libstdc++/61946
libstdc++/63449
middle-end/61010
middle-end/61045
middle-end/62103
rtl-optimization/57003
rtl-optimization/60866
rtl-optimization/60901
rtl-optimization/61801
rtl-optimization/62004
rtl-optimization/62030
target/49423
target/52941
target/61044
target/61202
target/61208
target/61231
target/61239
target/61249
target/61300
target/61423
target/61431
target/61443
target/61483
target/61542
target/61545
target/61570
target/61586
target/61996
target/62195
target/62218
target/63428
tree-optimization/60196
tree-optimization/61375
tree-optimization/61383
tree-optimization/61452
tree-optimization/61684
tree-optimization/61964
tree-optimization/62073
tree-optimization/62075
tree-optimization/63189
tree-optimization/63341
tree-optimization/63375

show more ...

import GCC 4.8 branch at r206687.

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 -Wunu

import GCC 4.8 branch at r206687.

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/

show more ...

Import of gcc 4.5.4. The (possibly incomplete) list of fixed bugs is

50617 [4.5/4.6/4.7 Regression] ICE: RTL flag check: INSN_ANNULLED_BRANCH_P used with unexpected rtx code 'simplify_immed_subreg

Import of gcc 4.5.4. The (possibly incomplete) list of fixed bugs is

50617 [4.5/4.6/4.7 Regression] ICE: RTL flag check: INSN_ANNULLED_BRANCH_P used with unexpected rtx code 'simplify_immed_subreg' in output_bb, at config/pa/pa.c:6631
45383 [4.5 Regression] Implicit conversion to pointer does no longer automatically generate operator== and operator!=.
45606 [4.5 Regression] match a method prototyped a typedef alias with the original type (using stdlib)
47398 [4.5 Regression] tree check: accessed elt 10 of tree_vec with 9 elts in tsubst, at cp/pt.c:10500
49951 [4.5/4.6/4.7 Regression] Debug stepping behavior regarding g++ Class destructor has changed for the worse starting at gcc 4.5.0
43190 [4.4 Regression] Used pointer typedefs eliminated from debug info
43866 [4.4 Regression] wrong code with -fbounds-check -funswitch-loops
43897 [4.4 Regression] IA-64 asm clobbers are ignored
44777 [4.4 Regression] ICE: SIGSEGV with -fprofile-use in gcc.c-torture/execute/comp-goto-2.c
46985 [4.5 Regression] ICE: SIGSEGV in is_gimple_min_invariant (gimple.c:2742) with -fno-tree-ccp -fno-tree-dominator-opts -fno-tree-fre
47780 [4.5 Regression] -fcompare-debug failure with -O -fgcse -fgcse-las -fstack-protector-all
47858 [4.5/4.6/4.7 Regression] IPA-SRA decreases quality of debug info
47903 [4.5 Regression] var-tracking.c: valgrind error
48685 [4.5 Regression] ICE in gimplify_expr, at gimplify.c:7034
52139 [4.5 Regression] ICE: in remove_insn, at emit-rtl.c:3960 with -O -fPIC -fno-tree-dominator-opts -fno-tree-fre
48046 [4.5 Regression] Expected diagnostic "reference to 'type' is ambiguous" not given for function-local static declaration
51406 [4.5/4.6/4.7 Regression][c++0x] Incorrect result of static_cast to rvalue reference to base class.
43949 [4.4 Regression] bogus warning: array subscript is above array bounds
45982 [4.4 Regression] PTA does not track integers
48172 [4.5 Regression] incorrect vectorization of loop in GCC 4.5.* with -O3
49115 [4.5 Regression] invalid return value optimization (?) when exception is thrown and caught
49279 [4.5 Regression] Optimization incorrectly presuming constant variable inside loop in g++ 4.5 and 4.6 with -O2 and -O3 for x86_64 targets
50189 [4.5 Regression] Wrong code error in -O2 [-fstrict-enums] compile, target independent
48660 [4.5/4.6 Regression] ARM ICE in expand_expr_real_1
23656 Cross-compilation with newlib fails in libiberty
37985 [4.5/4.6/4.7/4.8 Regression] unsigned char shift lacks "statement with no effect" warning
38292 [4.5/4.6/4.7/4.8 Regression] corrupted profile info with -O[23] -fprofile-use
40778 [4.5 Regression] Mudflap instrumentation missing in cloned function.
40992 [4.4 Regression] cunroll ignoring asm size
48306 [4.4 Regression] presence of gcc subdir with . in PATH causes breakdown
49651 [4.4 Regression] nested lambdas and -O3 produced incorrect integer variable increments
52223 [4.5/4.6 Regression] libffi's man page install breaks with multilibs and overridden mandir
53418 [4.5 Regression] ICE at gimplify.c:7773
53138 [4.7 Regression] spaceship operator miscompiled
50091 [4.5/4.6/4.7 Regression] -fstack-check generates wrong assembly
50979 architecture mismatch: "mul32" not enabled for "smul" or "umul"
51187 miscompilation of genrecog.c at -O2 for --target=avr
52717 thunk referenced in discarded section when building samba with -flto
48742 [4.5 Regression] Internal error in gimplify_expr
49120 [4.5 Regression] bogus "value computed is not used" warning (variable-length array in compound statement)
49161 [4.5 Regression] Fix VRP on switch stmts
49619 [4.5 Regression] ICE in simplify_subreg, at simplify-rtx.c:5362
49621 [4.5 regression] ICE in trunc_int_for_mode, at explow.c:57
49644 [4.5 Regression] post-increment of promoted operand is incorrect.
51767 [4.5 Regression] ICE with degenerated asm goto
51768 [4.5 Regression] ICE with invalid asm goto
52736 [4.5/4.6/4.7/4.8 Regression] miscompilation: store to aliased __m128d is 8 Bytes off
49440 [4.6 regression] Invalid dynamic_cast for unnamed namespace
50565 [4.5/4.6/4.7 Regression] initializer element is not computable at load time
52294 [4.7 Regression] [ARM Thumb] generated asm code produces "branch out of range" error in gas with -Os -mcpu=cortex-a9
41159 [LTO] ICE in insert_value_copy_on_edge, at tree-outof-ssa.c:225
48822 [4.5 Regression] G++ gets stucks and never finishes compilation when enabling -O2/3 optimization options.
50162 [4.5 Regression] Wrong vectorization
49381 Unresolved symbols in libgcjgc.a when linking gctest
45786 [4.5 Regression] Relational operators .eq. and == are not recognized as equivalent
48708 Invalid V2DI vector set insn generated
50464 Using -Ofast -march=bdver1 results in internal compiler error: in extract_insn, at recog.c:2109
51821 [4.5/4.6/4.7 Regression] 64bit > 32bit conversion produces incorrect results with optimizations
52698 -maddress-mode=long doesn't work
53228 [4.6/4.7/4.8 Regression] target attributes in libcpp/lex.c cause illegal instructions to be used elsewhere
42082 [C++0x] ICE on probably invalid with "canonical types differ for identical types"
42652 vectorizer created unaligned vector insns
42856 [4.4 Regression] FAIL: gcc.dg/torture/pr41555.c -O0 (test for excess errors)
47733 psignal (int, const? char*) in libiberty/strsignal.h
48743 -march=native mis-detects AMD K6-2+ / K6-3 as Athlon - compiled C fails with "illegal instruction"
49038 [4.5/4.6/4.7 Regression] -ftree-vectorise introduces reads past end of array
49448 arm-tab-linux-gnu-eabi enableds big endian when it should not
49461 boehm-gc and gcj incompatible with pie
50875 O3 and -mavx lead to internal compiler error: in find_reloads
51161 [C++0x] Illegal static_cast to rvalue reference to ambiguous base class
51393 Wrong parameter type for _mm256_insert_epi64 in avxintrin.h
51444 [4.4 Regression]: Spurious "is used uninitialized" warning for structure with bitfields
51835 ARM EABI violation when passing arguments to helper floating functions like __aeabi_d2iz
52894 [4.5,4.6,4.7 Regression] Stage1 bootstrap fails with gcc-4.6.3: Infinite loop in pointer_set_insert
53310 [4.5/4.6/4.7/4.8 Regression] EOSHIFT leaks memory
53744 gcov version oscillates between 407* and 407p on branches
52335 [4.4/4.5/4.6/4.7 Regression] I/O: -std=f95 rejects valid DELIM= in OPEN
46192 [4.5/4.6/4.7 regression] wrong code for renaming of volatile packed array with address clause
44581 [4.5/4.6/4.7 Regression] internal compiler error: in simplify_subreg
49307 [4.5/4.6/4.7 Regression] ICE in spill_failure, at reload1.c:2113
50163 [4.4/4.5/4.6/4.7 Regression] ICE: initialization expression
50273 [4.5/4.6/4.7 Regression] -Walign-commons no longer effective
52022 [4.5/4.6/4.7 Regression] Wrong-code with procedures passed as actual argument
52452 [4.5/4.6/4.7/4.8 Regression] INTRINSIC cannot be applied to gfortran's ETIME
25973 [4.5/4.6/4.7/4.8 Regression] Wrong warning: control reaches end of non-void function
53521 [4.5/4.6/4.7/4.8 Regression] Memory leak with zero-sized array constructor

show more ...

initial import of GCC 4.5.3 sources. changes since 4.1 are way too numerous
to review, please see http://gcc.gnu.org/gcc-4.5/changes.html (and the 4.2,
4.3 and 4.4 versions, too.)

this includes the

initial import of GCC 4.5.3 sources. changes since 4.1 are way too numerous
to review, please see http://gcc.gnu.org/gcc-4.5/changes.html (and the 4.2,
4.3 and 4.4 versions, too.)

this includes the core, c++, objc and the non java/ada/fortran parts of the
testsuite.

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