[Bug other/53285] libibiberty's md5.c builds with warnings with 4.7 and trunk
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53285 --- Comment #2 from Matthias Klose 2012-05-28 06:42:37 UTC --- the patch is incomplete. the patch from glibc is found at http://sourceware.org/git/?p=glibc.git;a=patch;h=7dc6bd90c569c49807462b0740b18e32fab4d8b7 using anonymous unions which cannot be used for stage1. The original patch is http://sourceware.org/ml/libc-alpha/2011-07/msg00085.html A third approach from gnulib is pointed out in http://sourceware.org/ml/libc-alpha/2011-07/msg00093.html
[Bug libstdc++/53504] New: configure script of platform TLS support.
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53504
Bug #: 53504
Summary: configure script of platform TLS support.
Classification: Unclassified
Product: gcc
Version: 4.7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: lyricco...@gmail.com
file: gcc-4.70/stdc++v3/configure
line: 51506
#include
__thread int a;
static int *volatile a_in_other_thread;
static void *
thread_func (void *arg)
{
a_in_other_thread = &a;
return (void *)0;
}
int
main ()
{
pthread_t thread;
void *thread_retval;
int *volatile a_in_main_thread;
a_in_main_thread = &a;
if (pthread_create (&thread, (pthread_attr_t *)0,
thread_func, (void *)0))
return 0;
if (pthread_join (thread, &thread_retval))
return 0;
return (a_in_other_thread == a_in_main_thread);
;
return 0;
}
_ACEOF
if ac_fn_c_try_run "$LINENO"; then :
gcc_cv_have_tls=yes
else
gcc_cv_have_tls=no
fi
1. if we have TLS support, &a will be difference value in main() and
hread_func(), which means (a_in_other_thread == a_in_main_thread) eval to
false.
so, with TLS support => program exit with 0.
2. if "pthread_create" or "pthread_join" fails, program also exit with 0. "no
threads, no TLS".
so, without TLS support => program exit with 0.
whatever ac_fn_c_try_run get, this can not be right.
[Bug other/53285] libibiberty's md5.c builds with warnings with 4.7 and trunk
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53285 --- Comment #1 from Matthias Klose 2012-05-28 04:38:50 UTC --- Created attachment 27511 --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=27511 patch taken from glibc the md5.c copy in glibc was fixed with the attached patch
[Bug c++/53503] New: [4.7 Regression] [C++0x] unexpected AST of kind ltgt_expr
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53503 Bug #: 53503 Summary: [4.7 Regression] [C++0x] unexpected AST of kind ltgt_expr Classification: Unclassified Product: gcc Version: 4.7.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ AssignedTo: unassig...@gcc.gnu.org ReportedBy: lil...@gmail.com Created attachment 27510 --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=27510 Preporcessed source G++ 4.7 can't compile a one-line file with both -std=c++0x and -fno-trapping-math: $ cat a.cpp #include $ g++ -fno-trapping-math -std=c++0x -c a.cpp In file included from a.cpp:1:0: /usr/lib/gcc/x86_64-redhat-linux/4.7.0/../../../../include/c++/4.7.0/cmath: In function ‘constexpr bool std::islessgreater(float, float)’: /usr/lib/gcc/x86_64-redhat-linux/4.7.0/../../../../include/c++/4.7.0/cmath:764:47: sorry, unimplemented: unexpected AST of kind ltgt_expr /usr/lib/gcc/x86_64-redhat-linux/4.7.0/../../../../include/c++/4.7.0/cmath:764: confused by earlier errors, bailing out Preprocessed source stored into /tmp/ccGqxqjD.out file, please attach this to your bugreport. I was using GCC 4.7.0 20120507 on Fedora 17.
[Bug c/53502] [4.8 Regression] Bootstrap broken with --disable-build-poststage1-with-cxx
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53502 --- Comment #2 from Andrew Pinski 2012-05-27 23:42:17 UTC --- The warning is correct, the typedef is unused. The enum is not but the typedef to the enum is unused.
[Bug c/53502] [4.8 Regression] Bootstrap broken with --disable-build-poststage1-with-cxx
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53502
Thomas Koenig changed:
What|Removed |Added
Keywords||rejects-valid
Known to work||4.6.2
Target Milestone|--- |4.8.0
Known to fail||4.8.0
--- Comment #1 from Thomas Koenig 2012-05-27
23:25:50 UTC ---
Better with source to the test case...
int bar(void)
{
typedef enum
{
ZERO=0, ONE
} foo;
return ONE;
}
[Bug c/53502] New: [4.8 Regression] Bootstrap broken with --disable-build-poststage1-with-cxx
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53502 Bug #: 53502 Summary: [4.8 Regression] Bootstrap broken with --disable-build-poststage1-with-cxx Classification: Unclassified Product: gcc Version: 4.8.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c AssignedTo: unassig...@gcc.gnu.org ReportedBy: tkoe...@gcc.gnu.org ../trunk/configure --prefix=$HOME --enable-languages=c,fortran --disable-build-poststage1-with-cxx The error was: ../../trunk/gcc/fortran/decl.c: In function 'match_attr_spec': ../../trunk/gcc/fortran/decl.c:3276:3: error: typedef 'decl_types' locally defined but not used [-Werror=unused-local-typedefs] decl_types; ^ cc1: all warnings being treated as errors make[3]: *** [fortran/decl.o] Error 1 make[3]: *** Waiting for unfinished jobs make[3]: Leaving directory `/home/ig25/Gcc/trunk-bin/gcc' make[2]: *** [all-stage2-gcc] Error 2 make[2]: Leaving directory `/home/ig25/Gcc/trunk-bin' make[1]: *** [stage2-bubble] Error 2 make[1]: Leaving directory `/home/ig25/Gcc/trunk-bin' make: *** [all] Error 2 Reduced test case: ig25@linux-fd1f:~/Krempel/Boot> gcc -Werror -Wall foo.c foo.c: In function 'bar': foo.c:6:5: error: typedef 'foo' locally defined but not used [-Werror=unused-local-typedefs] } foo; ^ cc1: all warnings being treated as errors ig25@linux-fd1f:~/Krempel/Boot> gcc -v Using built-in specs. COLLECT_GCC=gcc COLLECT_LTO_WRAPPER=/home/ig25/lib/gcc/x86_64-unknown-linux-gnu/4.8.0/lto-wrapper Target: x86_64-unknown-linux-gnu Configured with: ../trunk/configure --prefix=/home/ig25 --enable-languages=c,fortran Thread model: posix gcc version 4.8.0 20120527 (experimental) (GCC) ig25@linux-fd1f:~/Krempel/Boot> 4.6.2 doesn't warn.
[Bug middle-end/38474] slow compilation at -O0 due to expand's temp slot goo
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38474 Steven Bosscher changed: What|Removed |Added Keywords||patch URL||http://gcc.gnu.org/ml/gcc-p ||atches/2012-05/msg01813.htm ||l --- Comment #52 from Steven Bosscher 2012-05-27 23:15:19 UTC --- Patch set posted by matz.
[Bug middle-end/51389] GCC uses up to 75GB of virtual memory
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51389 --- Comment #6 from Steven Bosscher 2012-05-27 23:14:03 UTC --- If this is fixed for GCC 4.7, why leave the bug report open? Do you plan to back-port a similar fix to older release branches?
[Bug tree-optimization/18687] >200% compile time regression compared to gcc-3.4
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18687 Steven Bosscher changed: What|Removed |Added CC||steven at gcc dot gnu.org --- Comment #55 from Steven Bosscher 2012-05-27 23:11:06 UTC --- Some new timings: hashes.c -O0: 3.4.64.2.44.3.34.4.74.6.3 user0.020760.020370.019720.022910.02286 sys0.003830.004830.004680.005830.00568 hashes.c -O1: 3.4.64.2.44.3.34.4.74.6.3 user0.02780.04720.04590.05390.0572 sys0.00460.00550.00660.00750.0082 hashes.c -O2: 3.4.64.2.44.3.34.4.74.6.3 user0.04520.07000.07440.07730.0842 sys0.00470.00650.00600.00830.0086 infcodes.c -O0: 3.4.64.2.44.3.34.4.74.6.3 user0.03740.03960.04210.04990.0490 sys0.00460.00590.00650.00640.0071 infcodes.c -O1: 3.4.64.2.44.3.34.4.74.6.3 user0.04810.08860.08210.09500.0849 sys0.00460.00740.00660.00920.0070 infcodes.c -O2: 3.4.64.2.44.3.34.4.74.6.3 user0.07450.13030.13060.13890.1354 sys0.00540.00960.00960.00880.0091
[Bug bootstrap/53343] [4.8 regression] options.c:9944:1: error: no previous prototype for 'common_handle_option_auto' breaks bootstrap
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53343 Thomas Koenig changed: What|Removed |Added CC||tkoenig at gcc dot gnu.org --- Comment #5 from Thomas Koenig 2012-05-27 23:11:28 UTC --- See also http://gcc.gnu.org/ml/fortran/2012-05/msg00152.html
[Bug tree-optimization/53501] New: incorrect loop optimization with -O2
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53501
Bug #: 53501
Summary: incorrect loop optimization with -O2
Classification: Unclassified
Product: gcc
Version: 4.7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: mi...@gcc.ksp.sk
Created attachment 27509
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=27509
preprocessed file for which the bug manifests
Sorry if this is a duplicate or if I miscategorized it (my first bug report
here, I did search for this and found nothing similar enough).
This bug appears both in gcc and g++, my best guess is that it has to do with
incorrect optimization of a loop. Bug present at amd64, gcc versions 4.6.3
(Ubuntu) and 4.7.0 (compiled), details follow:
$ gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/4.6/lto-wrapper
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu/Linaro
4.6.3-1ubuntu5' --with-bugurl=file:///usr/share/doc/gcc-4.6/README.Bugs
--enable-languages=c,c++,fortran,objc,obj-c++ --prefix=/usr
--program-suffix=-4.6 --enable-shared --enable-linker-build-id
--with-system-zlib --libexecdir=/usr/lib --without-included-gettext
--enable-threads=posix --with-gxx-include-dir=/usr/include/c++/4.6
--libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu
--enable-libstdcxx-debug --enable-libstdcxx-time=yes --enable-gnu-unique-object
--enable-plugin --enable-objc-gc --disable-werror --with-arch-32=i686
--with-tune=generic --enable-checking=release --build=x86_64-linux-gnu
--host=x86_64-linux-gnu --target=x86_64-linux-gnu
Thread model: posix
gcc version 4.6.3 (Ubuntu/Linaro 4.6.3-1ubuntu5)
$ ./gcc -v # my build of 4.7.0
Using built-in specs.
COLLECT_GCC=./gcc
COLLECT_LTO_WRAPPER=/home/misof/Desktop/newgcc/libexec/gcc/x86_64-unknown-linux-gnu/4.7.0/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: ./configure --prefix=/home/misof/Desktop/newgcc/
--disable-multilib
Thread model: posix
gcc version 4.7.0 (GCC)
Here is the offending source code:
$ cat bug.c
#include
int e[100], n;
void foo(void) {
int i, k = 0;
for (i = 0; i < n; ++i) { e[k] = 10; ++k; e[k] = 10; ++k; }
for (i = 0; i < k; ++i) printf("%d\n",e[i]);
printf("k=%d\n",k);
}
int main(void) {
n = 10;
foo();
return 0;
}
Up to my best knowledge this should be valid C code. When compiled without
optimizations or with -O1, everything works as expected:
$ gcc -Wall -Wextra bug.c && ./a.out
10
10
10
10
k=4
However, once -O2 or more is used, the second for-cycle seems to be incorrectly
optimized away:
$ gcc -Wall -Wextra -O2 bug.c && ./a.out
k=4
Interestingly, -fwrapv does make a difference, even though there seem to be no
integer overflows in the code:
$ gcc -Wall -Wextra -O2 -fwrapv bug.c && ./a.out
10
10
10
10
k=4
Below is the complete stdout of
$ gcc -v -save-temps -Wall -Wextra -O2 bug.c
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/4.6/lto-wrapper
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu/Linaro
4.6.3-1ubuntu5' --with-bugurl=file:///usr/share/doc/gcc-4.6/README.Bugs
--enable-languages=c,c++,fortran,objc,obj-c++ --prefix=/usr
--program-suffix=-4.6 --enable-shared --enable-linker-build-id
--with-system-zlib --libexecdir=/usr/lib --without-included-gettext
--enable-threads=posix --with-gxx-include-dir=/usr/include/c++/4.6
--libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu
--enable-libstdcxx-debug --enable-libstdcxx-time=yes --enable-gnu-unique-object
--enable-plugin --enable-objc-gc --disable-werror --with-arch-32=i686
--with-tune=generic --enable-checking=release --build=x86_64-linux-gnu
--host=x86_64-linux-gnu --target=x86_64-linux-gnu
Thread model: posix
gcc version 4.6.3 (Ubuntu/Linaro 4.6.3-1ubuntu5)
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-Wall' '-Wextra' '-O2' '-mtune=generic'
'-march=x86-64'
/usr/lib/gcc/x86_64-linux-gnu/4.6/cc1 -E -quiet -v -imultilib . -imultiarch
x86_64-linux-gnu bug.c -mtune=generic -march=x86-64 -Wall -Wextra -O2
-fpch-preprocess -fstack-protector -o bug.i
ignoring nonexistent directory "/usr/local/include/x86_64-linux-gnu"
ignoring nonexistent directory
"/usr/lib/gcc/x86_64-linux-gnu/4.6/../../../../x86_64-linux-gnu/include"
ignoring duplicate directory "/usr/include/x86_64-linux-gnu"
#include "..." search starts here:
#include <...> search starts here:
/usr/include/x86_64-linux-gnu
/usr/lib/gcc/x86_64-linux-gnu/4.6/include
/usr/local/include
/usr/lib/gcc/x86_64-linux-gnu/4.6/include-fixed
/usr/include
End of search list.
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-Wall' '-Wextra' '-O2' '-mtune=generic'
'-march=x86-64'
/usr/lib/gcc/x86_64-linux-gnu/4.6/cc1 -fpreprocessed bug.i -quiet -dumpbase
bug.c -mtune=generic -march=x86-64 -auxbase bug -O2 -
[Bug bootstrap/53343] [4.8 regression] options.c:9944:1: error: no previous prototype for 'common_handle_option_auto' breaks bootstrap
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53343 --- Comment #4 from Mikael Pettersson 2012-05-27 21:05:27 UTC --- (In reply to comment #3) > >--disable-build-poststage1-with-cxx > > Is there a reason why you are using this option? Yes, 1. It's a valid option, and it doesn't disable any functionality in the final compiler. 2. Bootstrapping in C++ mode has been reported to increase bootstrap time, I don't have any numbers, but this was mentioned last year around the time the default was changed. As I bootstrap more or less continuously on fairly underpowered boxes (arm, m68k, even my dual-cpu sparc64 SunBlade2500 is too slow compared to my x86 boxes), I don't want to spend cycles (and generate heat) on something that is of no value to me. 3. The C++ FE has repeatedly failed to warn on some forms of code that the C FE does warn about, allowing dodgy (for a C-centric definition of dodgy) code to enter the gcc code base. Bootstrapping in C mode ensures that such regressions are detected.
[Bug c++/53500] internal compiler error in joust()
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53500 --- Comment #6 from Paul Pogonyshev 2012-05-27 20:03:40 UTC --- Created attachment 27508 --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=27508 much reduced testcase not using any libraries other than libstdc++ gcc-4.7 -std=c++11 -save-temps -I. -DBOOST_TEST_DYN_LINK=1 -c tests/map-insert.cpp -o tests/map-insert.o tests/map-insert.cpp: In function ‘void foo()’: tests/map-insert.cpp:41:60: internal compiler error: in joust, at cp/call.c:8014 Command line is the same as before, but it shouldn't matter.
[Bug c++/53500] internal compiler error in joust()
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53500 --- Comment #5 from Andrew Pinski 2012-05-27 19:57:45 UTC --- Though with -ftime-report I get an internal error: /usr/include/c++/4.7/bits/alloc_traits.h:48:11: internal compiler error: in timevar_start, at timevar.c:344
[Bug c++/53500] internal compiler error in joust()
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53500 --- Comment #4 from Andrew Pinski 2012-05-27 19:56:43 UTC --- It compiles on the trunk. Though takes a long time.
[Bug c++/53500] internal compiler error in joust()
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53500 --- Comment #3 from Paolo Carlini 2012-05-27 19:49:56 UTC --- Please do your best to reduce the testcase, normally less than ~100 lines are enough: http://gcc.gnu.org/wiki/A_guide_to_testcase_reduction In any case a preprocessed .ii must be attached, possibly compressed with, eg, bzip2, for the PR to be valid. Thanks.
[Bug c++/53500] internal compiler error in joust()
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53500 --- Comment #2 from Paul Pogonyshev 2012-05-27 19:33:35 UTC --- (In reply to comment #1) > I don't see it being attached. Apparently it got eaten as too large. Please see http://rghost.net/38322304
[Bug c++/53500] internal compiler error in joust()
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53500 Paolo Carlini changed: What|Removed |Added Status|UNCONFIRMED |WAITING Last reconfirmed||2012-05-27 Ever Confirmed|0 |1
[Bug c++/53500] internal compiler error in joust()
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53500 --- Comment #1 from Andrew Pinski 2012-05-27 19:11:41 UTC --- > I attached the /tmp/... file. I don't see it being attached.
[Bug c++/53500] internal compiler error in joust()
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53500 Andrew Pinski changed: What|Removed |Added Severity|major |normal
[Bug c++/53500] New: internal compiler error in joust()
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53500 Bug #: 53500 Summary: internal compiler error in joust() Classification: Unclassified Product: gcc Version: 4.7.0 Status: UNCONFIRMED Severity: major Priority: P3 Component: c++ AssignedTo: unassig...@gcc.gnu.org ReportedBy: pogonys...@gmx.net Version: gcc-4.7 (Debian 4.7.0-9) 4.7.0 x86_64-linux-gnu Here is the command and console compiler output: gcc-4.7 -std=c++11 -save-temps -I. -DBOOST_TEST_DYN_LINK=1 -c tests/map-insert.cpp -o tests/map-insert.o tests/map-insert.cpp: In instantiation of ‘void map_insert::test_map_insert_initializers_1::test_method() [with implementation = HugeForwardMap]’: tests/map-insert.cpp:155:124: required from ‘static void map_insert::test_map_insert_initializers_1_invoker::run(boost::type*) [with TestType = HugeForwardMap]’ /usr/local/include/boost/test/unit_test_suite_impl.hpp:357:25: required from ‘void boost::unit_test::ut_detail::test_case_template_invoker::operator()() [with TestCaseTemplate = map_insert::test_map_insert_initializers_1_invoker; TestType = HugeForwardMap]’ /usr/local/include/boost/test/utils/callback.hpp:56:35: required from ‘boost::unit_test::ut_detail::unused boost::unit_test::ut_detail::invoker::invoke(Functor&) [with Functor = boost::unit_test::ut_detail::test_case_template_invoker]’ /usr/local/include/boost/test/utils/callback.hpp:89:58: required from ‘R boost::unit_test::ut_detail::callback0_impl_t::invoke() [with R = boost::unit_test::ut_detail::unused; Functor = boost::unit_test::ut_detail::test_case_template_invoker]’ tests/map-insert.cpp:215:94: required from here tests/map-insert.cpp:162:3: internal compiler error: in joust, at cp/call.c:8014 Please submit a full bug report, with preprocessed source if appropriate. See for instructions. Preprocessed source stored into /tmp/ccR3ebge.out file, please attach this to your bugreport. I attached the /tmp/... file.
[Bug c/53467] xgcc:Internal error: Bus error (program cc1)
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53467 --- Comment #6 from Jonathan Wakely 2012-05-27 16:45:29 UTC --- The core file was not generated by gcc, as gdb says it came from cc1
[Bug c++/53498] Compiler crashes during C++11 template magic compilation
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53498 --- Comment #3 from Daniel Krügler 2012-05-27 16:09:04 UTC --- (In reply to comment #2) > As you mention it, you don't accidently know, how a correct version would > look? This request would be off-topic here, but I responded off-list to you. > I want to test, if the class U has a method print compatible with the given > ARGS. Your example does not perform any kind of "test", so I'm not sure that I understand your question correctly [But keep in mind that any responses to that issue here should concentrate on the bug report, not on details of C++ programming techniques].
[Bug c/53467] xgcc:Internal error: Bus error (program cc1)
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53467 --- Comment #5 from martin 2012-05-27 16:06:59 UTC --- Comment on attachment 27506 --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=27506 core - debug for gdb gdb $(which gcc) ./core GNU gdb 6.3-debian Copyright 2004 Free Software Foundation, Inc. GDB is free software, covered by the GNU General Public License, and you are welcome to change it and/or distribute copies of it under certain conditions. Type "show copying" to see the conditions. There is absolutely no warranty for GDB. Type "show warranty" for details. This GDB was configured as "sparc-linux"...Using host libthread_db library "/lib/libthread_db.so.1". warning: core file may not match specified executable file. Core was generated by `/backup/gcc-4.3.0-compiled/./gcc/cc1 -E -quiet -iprefix /c/backup/gcc-4.3.0-com'. Program terminated with signal 10, Bus error. #0 0x2000ab58 in ?? () Breakpoint 1 at 0x13214: file ../../gcc-4.0.0/gcc/gcc.c, line 6733. Function "internal_error" not defined. Breakpoint 2 at 0x37348 Breakpoint 3 at 0x37210
[Bug c/53467] xgcc:Internal error: Bus error (program cc1)
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53467 --- Comment #4 from martin 2012-05-27 16:03:35 UTC --- Created attachment 27507 --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=27507 df-core.o debug for gdb
[Bug c/53467] xgcc:Internal error: Bus error (program cc1)
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53467 --- Comment #3 from martin 2012-05-27 16:01:23 UTC --- Created attachment 27506 --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=27506 debug for gdb created with ulimit -c unlimited & make --debug CFLAGS='-g -O0'
[Bug c++/53498] Compiler crashes during C++11 template magic compilation
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53498 --- Comment #2 from o.mangold at googlemail dot com 2012-05-27 15:33:16 UTC --- (In reply to comment #1) > While the test code is somewhat broken, Yes, I'm not surprised, this template stuff is a complete nightmare to me. As you mention it, you don't accidently know, how a correct version would look? I want to test, if the class U has a method print compatible with the given ARGS.
[Bug c++/53498] Compiler crashes during C++11 template magic compilation
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53498
Daniel Krügler changed:
What|Removed |Added
CC||daniel.kruegler at
||googlemail dot com
--- Comment #1 from Daniel Krügler
2012-05-27 14:32:40 UTC ---
While the test code is somewhat broken, I found some suspicious compiler
behaviour when rewriting this into the following form, compiled with
-std=c++11 -Wall using gcc 4.8.0 20120520 (experimental):
//
template
struct A
{
template
static
auto a(const U& u, const Args&... args, int) -> decltype(u.print(args...))
{
return u.print(args...);
}
template
static
int a(const U& u, const Args&... args, ...)
{
return 0;
}
};
template
struct B
{
template
static
void b(const U& u, const Args&... args, decltype(A::a(u, args...,
0)) dummy)
{
}
};
int main() {
A::a(0, 0, 0); // OK
B::b(0, 0, 0); // ?
}
//
On my mingw build there is no diagnostics and no binary output produced except
that the compiler does not return successfully due to the last line
instantiating B. In my experience that gives a seg fault on other systems,
so I recommend to run it through another system.
[Bug c++/53499] Incorrect partial ordering result with member vs non-member
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53499 --- Comment #1 from Johannes Schaub 2012-05-27 14:00:20 UTC --- Sorry, GCC picks the same function (non-member) disregarding of the C++ Standards mode. The comments were a left-over from a clang bug report.
[Bug c++/53499] New: Incorrect partial ordering result with member vs non-member
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53499
Bug #: 53499
Summary: Incorrect partial ordering result with member vs
non-member
Classification: Unclassified
Product: gcc
Version: 4.7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: schaub.johan...@googlemail.com
I think that this is ambiguous for partial ordering ambiguities, but GCC
accepts this code, selecting the non-member
template
class ptr
{
public:
// Picked in C++11 mode.
template
void operator- (T) const
{ static_assert(sizeof(T) == 0, "#1"); }
};
// Picked in default C++ mode.
template
void operator- (const ptr&, const ptr&)
{ static_assert(sizeof(T1) == 0, "#2"); }
int
main ()
{
ptr a, b;
(void) (b - a);
}
[Bug c++/53498] New: Compiler crashes during C++11 template magic compilation
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53498
Bug #: 53498
Summary: Compiler crashes during C++11 template magic
compilation
Classification: Unclassified
Product: gcc
Version: 4.7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: o.mang...@googlemail.com
I was trying to create some template magic to create a check for the existence
of a function with variable number of arguments in C++11. Honestly, I don't
know, if my code should compile through, as the problem happened when I was
trying to figure out how to make it work. I got a compiler crash (which I guess
shouldn't happen in any case). I cooked it down to the example below:
> g++ -std=c++11 Crash.cxx
g++: internal compiler error: Segmentation fault (program cc1plus)
Please submit a full bug report,
with preprocessed source if appropriate.
See for instructions.
kiwi/SafePrintf$g++ -std=c++11 Crash.cxx
g++: internal compiler error: Segmentation fault (program cc1plus)
Please submit a full bug report,
with preprocessed source if appropriate.
See for instructions.
---
--- Crash.cxx ---
template
class A
{
public:
template
auto a(const U& u,const ARGS&... args,int) -> decltype(u.print(args...))
{
}
template
int a(const U& u,const ARGS&... args,...)
{
}
};
template
class B
{
public:
template static void
b(const U& u,const ARGS&... args,
decltype(A::a(u,args...,0)) dummy)
{
}
};
int main() {
B dummy;
return 0;
}
[Bug c++/53439] g++ generates buggy code with optimisation flags
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53439 --- Comment #3 from Christophe Prud'homme 2012-05-27 11:59:46 UTC --- the preprocessed sources files are here (about 3MB) http://feelpp.googlecode.com/files/feel-gcc-ifiles.tar.gz see initial email
[Bug c++/53497] New: Partial ordering of function templates does not order lvalue/rvalue references correctly
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53497
Bug #: 53497
Summary: Partial ordering of function templates does not order
lvalue/rvalue references correctly
Classification: Unclassified
Product: gcc
Version: 4.7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: vlu...@gmx.de
Following defect report 1164
(http://open-std.org/JTC1/SC22/WG21/docs/cwg_defects.html#1164) a rule was
added to partial ordering of function templates, so that parameters declared as
lvalue-references are considered more specialized than those declared as
rvalue-references. GCC does not implement this, i.e.
---
template
void t(T&);
template
void t(T&&);
int x;
void f() {
t(x);
}
---
is rejected by GCC 4.7.0 and a 4.8.0 prerelease. Diagnostic for the latter is:
-
c++ -std=c++11 -c ref_binding.cc
ref_binding.cc: In function ‘void f()’:
ref_binding.cc:8:6: error: call of overloaded ‘t(int&)’ is ambiguous
t(x);
^
ref_binding.cc:8:6: note: candidates are:
ref_binding.cc:2:6: note: void t(T&) [with T = int]
void t(T&);
^
ref_binding.cc:4:6: note: void t(T&&) [with T = int&]
void t(T&&);
^
-
Full compiler identification:
-
c++ -v
Using built-in specs.
COLLECT_GCC=/home/lima/vanilla_installs/gcc_and_tools/bin/c++
COLLECT_LTO_WRAPPER=/home/lima/vanilla_installs/gcc_and_tools/lib/gcc/x86_64-unknown-linux-gnu/4.8.0/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: ../gcc_svn/configure
--prefix=/home/lima/vanilla_installs/gcc_and_tools --enable-threads
--enable-__cxa_atexit --enable-languages=c,c++
--enable-version-specific-runtime-libs --disable-multilib
Thread model: posix
gcc version 4.8.0 20120526 (experimental) (GCC)
DR 1164 appears to have made it into the standard, it is marked FDIS and I find
it in both the N3290 and N3376 drafts of C++.
[Bug ada/50934] Attribute Max_Size_In_Storage_Elements is wrong for controlled types
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50934 Eric Botcazou changed: What|Removed |Added Status|UNCONFIRMED |RESOLVED URL||http://gcc.gnu.org/ml/gcc-c ||vs/2011-11/msg00869.html CC||ebotcazou at gcc dot ||gnu.org Resolution||FIXED Target Milestone|--- |4.7.0 --- Comment #5 from Eric Botcazou 2012-05-27 11:00:27 UTC --- Indeed.
[Bug ada/50934] Attribute Max_Size_In_Storage_Elements is wrong for controlled types
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50934 --- Comment #4 from simon at pushface dot org 2012-05-27 10:22:42 UTC --- This problem has been fixed in the released 4.7.0.
