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* [Bug go/56431] New: -lpthread should be added to -lgo
@ 2013-02-22 23:45 hjl.tools at gmail dot com
2013-02-27 14:54 ` [Bug go/56431] " ian at airs dot com
` (6 more replies)
0 siblings, 7 replies; 8+ messages in thread
From: hjl.tools at gmail dot com @ 2013-02-22 23:45 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56431
Bug #: 56431
Summary: -lpthread should be added to -lgo
Classification: Unclassified
Product: gcc
Version: 4.8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: go
AssignedTo: ian@airs.com
ReportedBy: hjl.tools@gmail.com
Depends on: 56353
+++ This bug was initially created as a clone of Bug #56353 +++
libjava.jni/invocation/PR16923.c behaves differently, depending
on linking with gold or ld. _Jv_RegisterClasses is weak reference
and libgcj.so isn't on the linker command line. Since libgcj.so isn't
on the linker command line, gold resolves _Jv_RegisterClasses to 0 and
ld silently resolves it to _Jv_RegisterClasses in libgcj.so:
[hjl@gnu-13 testsuite]$ readelf -sWr /tmp/PR16923.gold | grep
_Jv_RegisterClasses
8: 0000000000000000 0 NOTYPE WEAK DEFAULT UND _Jv_RegisterClasses
37: 0000000000000000 0 NOTYPE WEAK DEFAULT UND _Jv_RegisterClasses
[hjl@gnu-13 testsuite]$ readelf -sWr /tmp/PR16923.bfd | grep
_Jv_RegisterClasses
0000000000600cd0 0000000900000007 R_X86_64_JUMP_SLOT 00000000004005e0
_Jv_RegisterClasses + 0
9: 00000000004005e0 0 FUNC WEAK DEFAULT UND _Jv_RegisterClasses
59: 00000000004005e0 0 FUNC WEAK DEFAULT UND _Jv_RegisterClasses
[hjl@gnu-13 testsuite]$]
-lgo has the same issue. With the bfd linker, I got
[hjl@gnu-mic-2 go]$ ld --eh-frame-hdr -m elf_i386 -dynamic-linker
/lib/ld-linux.so.2 /lib/../lib/crt1.o /lib/../lib/crti.o
/export/build/gnu/gcc-asan/build-x86_64-linux/gcc/testsuite/go/../../32/crtbegin.o
-L/export/build/gnu/gcc-asan/build-x86_64-linux/x86_64-unknown-linux-gnu/32/libgo
-L/export/build/gnu/gcc-asan/build-x86_64-linux/x86_64-unknown-linux-gnu/32/libgo/.libs
-L/export/build/gnu/gcc-asan/build-x86_64-linux/gcc/testsuite/go/../../32
-L/lib/../lib -L/usr/lib/../lib
-L/export/build/gnu/gcc-asan/build-x86_64-linux/gcc/testsuite/go/../..
array-1.o -lgobegin -lgo -lm --wrap=pthread_create -lgcc_s -lgcc -lc -lgcc_s
-lgcc
/export/build/gnu/gcc-asan/build-x86_64-linux/gcc/testsuite/go/../../32/crtend.o
/lib/../lib/crtn.o
ld:
/export/build/gnu/gcc-asan/build-x86_64-linux/gcc/testsuite/go/../../32/libgcc.a(generic-morestack.o):
undefined reference to symbol 'pthread_sigmask@@GLIBC_2.0'
ld: note: 'pthread_sigmask@@GLIBC_2.0' is defined in DSO /lib/libpthread.so.0
so try adding it to the linker command line
/lib/libpthread.so.0: could not read symbols: Invalid operation
[hjl@gnu-mic-2 go]$
gold links, but it generates
51: 00000000 0 NOTYPE WEAK DEFAULT UND pthread_sigmask
It means that go executables generated by bfd ld and gold may behave
differently. Go driver should add -lpthread to -lgo if libgo.so is
linked against libpthread.so.
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug go/56431] -lpthread should be added to -lgo
2013-02-22 23:45 [Bug go/56431] New: -lpthread should be added to -lgo hjl.tools at gmail dot com
@ 2013-02-27 14:54 ` ian at airs dot com
2013-02-27 16:59 ` hjl.tools at gmail dot com
` (5 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: ian at airs dot com @ 2013-02-27 14:54 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56431
--- Comment #1 from Ian Lance Taylor <ian at airs dot com> 2013-02-27 14:54:22 UTC ---
The reference to pthread_sigmask in generic-morestack.c is weak, and the code
handles the weak reference correctly. It looks like gold is doing the right
thing by emitting a weak reference.
I don't understand why GNU ld is complaining about an undefined weak reference.
As far as I can see, this is a GNU ld bug; it should be testing
h->ref_regular_nonweak in the code that issues this "is defined in DSO"
warning.
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug go/56431] -lpthread should be added to -lgo
2013-02-22 23:45 [Bug go/56431] New: -lpthread should be added to -lgo hjl.tools at gmail dot com
2013-02-27 14:54 ` [Bug go/56431] " ian at airs dot com
@ 2013-02-27 16:59 ` hjl.tools at gmail dot com
2013-02-27 18:50 ` ian at airs dot com
` (4 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: hjl.tools at gmail dot com @ 2013-02-27 16:59 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56431
--- Comment #2 from H.J. Lu <hjl.tools at gmail dot com> 2013-02-27 16:59:17 UTC ---
The new GNU ld is complaining about an undefined weak reference because
it sees libpthread.so from DT_NEEDED in libgo.so. The old GNU ld just
silently adds libpthread.so from DT_NEEDED in libgo.so. When creating
executables, GNU ld checks DT_NEEDED in DSOes on command line. Since
libpthread.so is included from libgo.so for creating executables, it expects
libpthread.so will be used and pthread_sigmask is defined at run-time
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug go/56431] -lpthread should be added to -lgo
2013-02-22 23:45 [Bug go/56431] New: -lpthread should be added to -lgo hjl.tools at gmail dot com
2013-02-27 14:54 ` [Bug go/56431] " ian at airs dot com
2013-02-27 16:59 ` hjl.tools at gmail dot com
@ 2013-02-27 18:50 ` ian at airs dot com
2013-02-27 19:36 ` hjl.tools at gmail dot com
` (3 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: ian at airs dot com @ 2013-02-27 18:50 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56431
--- Comment #3 from Ian Lance Taylor <ian at airs dot com> 2013-02-27 18:49:43 UTC ---
Object OBJ has a weak reference to SYM.
OBJ is linked against shared library S1. S1 does not define SYM.
S1 happens to be linked against shared library S2. S2 does define SYM.
That will work fine: at runtime OBJ will see that SYM is defined, because S1
brings in S2.
Suppose that, later on, S1 is not linked against S2. That will also work fine:
at runtime OBJ will see that SYM is not defined.
Right now GNU ld is issuing a warning because it sees that the weak reference
from OBJ will be defined at runtime by S2, brought in at runtime because S1 is
linked against S2. GNU ld is suggesting that OBJ should be linked against S2
directly. But nothing will go wrong if S1 is changed such that it does not
link against S2.
Therefore, GNU ld's warning is inappropriate. There is no reason to link OBJ
against S2 in this case.
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug go/56431] -lpthread should be added to -lgo
2013-02-22 23:45 [Bug go/56431] New: -lpthread should be added to -lgo hjl.tools at gmail dot com
` (2 preceding siblings ...)
2013-02-27 18:50 ` ian at airs dot com
@ 2013-02-27 19:36 ` hjl.tools at gmail dot com
2013-02-27 21:08 ` ian at airs dot com
` (2 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: hjl.tools at gmail dot com @ 2013-02-27 19:36 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56431
--- Comment #4 from H.J. Lu <hjl.tools at gmail dot com> 2013-02-27 19:36:07 UTC ---
(In reply to comment #3)
> Object OBJ has a weak reference to SYM.
>
> OBJ is linked against shared library S1. S1 does not define SYM.
>
> S1 happens to be linked against shared library S2. S2 does define SYM.
>
> That will work fine: at runtime OBJ will see that SYM is defined, because S1
> brings in S2.
>
This isn't what happens. Since gold doesn't check S2 at link-time, it
resolves SYM to 0:
[hjl@gnu-6 pr15149]$ cat foo.c
#include <stdio.h>
extern int xxx () __attribute__((weak));
int
foo ()
{
if (&xxx)
return xxx ();
return 1;
}
int
main ()
{
printf ("xxx: %d\n", foo ());
return 0;
}
[hjl@gnu-6 pr15149]$ cat xxx.c
int
xxx ()
{
return 0;
}
[hjl@gnu-6 pr15149]$ cat yyy.c
/* Dummy */
[hjl@gnu-6 pr15149]$ make y
gcc -Wl,--no-copy-dt-needed-entries -c -o foo.o foo.c
gcc -Wl,--no-copy-dt-needed-entries -shared -fPIC -o libxxx.so xxx.c
gcc -Wl,--no-copy-dt-needed-entries -shared -fPIC -o libyyy.so yyy.c libxxx.so
-Wl,-rpath,.
gcc -Wl,--no-copy-dt-needed-entries -fuse-ld=gold -B./ -Wl,--no-as-needed -o y
foo.o libyyy.so -Wl,-rpath,.
[hjl@gnu-6 pr15149]$ ./y
xxx: 1
[hjl@gnu-6 pr15149]$
38: 0000000000000000 0 NOTYPE WEAK DEFAULT UND xxx
If gold sees SYM defined in S2, it will create a R_X86_64_JUMP_SLO relocation,
set xxx value to the PLT entry and resolve xxx to the PLT entry.
000000401ad0 000700000007 R_X86_64_JUMP_SLO 0000000000400570 xxx + 0
7: 0000000000400570 0 FUNC WEAK DEFAULT UND xxx
That is the difference between seeing SYM in S2 or not.
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug go/56431] -lpthread should be added to -lgo
2013-02-22 23:45 [Bug go/56431] New: -lpthread should be added to -lgo hjl.tools at gmail dot com
` (3 preceding siblings ...)
2013-02-27 19:36 ` hjl.tools at gmail dot com
@ 2013-02-27 21:08 ` ian at airs dot com
2013-02-27 21:21 ` hjl.tools at gmail dot com
2019-01-16 22:32 ` ian at airs dot com
6 siblings, 0 replies; 8+ messages in thread
From: ian at airs dot com @ 2013-02-27 21:08 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56431
--- Comment #5 from Ian Lance Taylor <ian at airs dot com> 2013-02-27 21:07:59 UTC ---
I see. Interesting. I wonder if that is a bug in gold. I wonder what other
ELF linkers do.
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug go/56431] -lpthread should be added to -lgo
2013-02-22 23:45 [Bug go/56431] New: -lpthread should be added to -lgo hjl.tools at gmail dot com
` (4 preceding siblings ...)
2013-02-27 21:08 ` ian at airs dot com
@ 2013-02-27 21:21 ` hjl.tools at gmail dot com
2019-01-16 22:32 ` ian at airs dot com
6 siblings, 0 replies; 8+ messages in thread
From: hjl.tools at gmail dot com @ 2013-02-27 21:21 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56431
--- Comment #6 from H.J. Lu <hjl.tools at gmail dot com> 2013-02-27 21:20:53 UTC ---
(In reply to comment #5)
> I see. Interesting. I wonder if that is a bug in gold. I wonder what other
I think this is related to the gold bug:
http://sourceware.org/bugzilla/show_bug.cgi?id=15153
> ELF linkers do.
On Linux, ld and gold set the standard.
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug go/56431] -lpthread should be added to -lgo
2013-02-22 23:45 [Bug go/56431] New: -lpthread should be added to -lgo hjl.tools at gmail dot com
` (5 preceding siblings ...)
2013-02-27 21:21 ` hjl.tools at gmail dot com
@ 2019-01-16 22:32 ` ian at airs dot com
6 siblings, 0 replies; 8+ messages in thread
From: ian at airs dot com @ 2019-01-16 22:32 UTC (permalink / raw)
To: gcc-bugs
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[-- Attachment #1: Type: text/plain; charset="UTF-8", Size: 52633 bytes --]
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=56431
--- Comment #8 from Ian Lance Taylor <ian at airs dot com> ---
The workaround for this is probably to change gcc/go/gospec.c to remove the
need_thread variable. That would have the effect of changing the only use of
need_thread to only test library > 0, which would mean that gccgo would add
-lpthread every time it adds -lgo. (I don't plan to try implementing and
testing this myself.)
>From gcc-bugs-return-629506-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jan 16 22:41:03 2019
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/88881] std::filesystem::status gives bad results on mingw32
Date: Wed, 16 Jan 2019 22:41:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88881
--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
This bug is the cause of:
FAIL: experimental/filesystem/operations/canonical.cc execution test
The trailing slashes in the paths cause the _wstat calls to fail.
>From gcc-bugs-return-629507-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jan 16 22:43:43 2019
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/88888] New: Cannot construct filesystem::path from variable length array
Date: Wed, 16 Jan 2019 22:43:00 -0000
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Bug ID: 88888
Summary: Cannot construct filesystem::path from variable length
array
Product: gcc
Version: 9.0
Status: UNCONFIRMED
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// { dg-options "-std=gnu++17" }
#include <filesystem>
int main()
{
int i = 2;
char vla[i] = {};
std::filesystem::path p = vla;
}
p.cc: In function 'int main()':
p.cc:7:29: error: conversion from 'char [i]' to non-scalar type
'std::filesystem::__cxx11::path' requested
7 | std::filesystem::path p = vla;
| ^~~
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Subject: [Bug libbacktrace/88244] [libbacktrace] Failure to open .gnu_debuglink is silent
Date: Wed, 16 Jan 2019 22:56:00 -0000
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--- Comment #1 from Tom de Vries <vries at gcc dot gnu.org> ---
Discussed here ( https://gcc.gnu.org/ml/gcc-patches/2019-01/msg00932.html ).
>From gcc-bugs-return-629509-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jan 16 22:57:20 2019
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From: "dmalcolm at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/88699] [9 Regression] tree check fail: expected function_decl, have using_decl in add_method, at cp/class.c:1137
Date: Wed, 16 Jan 2019 22:57:00 -0000
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--- Comment #7 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
Candidate patch: https://gcc.gnu.org/ml/gcc-patches/2019-01/msg00962.html
>From gcc-bugs-return-629511-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jan 16 23:16:18 2019
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/88886] [9 Regression] ice in get_constant, at c-family/c-format.c:292
Date: Wed, 16 Jan 2019 23:16:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88886
Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=86125
Assignee|unassigned at gcc dot gnu.org |msebor at gcc dot gnu.org
--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
The patch posted for bug 86125 fixes this ICE and results in the output below.
Let me try to revive it.
$ /build/gcc-86125/gcc/xgcc -B /build/gcc-86125/gcc -S pr88886.c
pr88886.c:1:5: warning: conflicting types for built-in function ‘sscanf’;
expected ‘int(const char *, const char *, ...)’
[-Wbuiltin-declaration-mismatch]
1 | int sscanf(long, unsigned[], ...);
| ^~~~~~
pr88886.c:1:1: note: ‘sscanf’ is declared in header ‘<stdio.h>’
+++ |+#include <stdio.h>
1 | int sscanf(long, unsigned[], ...);
pr88886.c:1:5: warning: conflicting types for built-in function ‘sscanf’;
expected ‘int(const char *, const char *, ...)’
[-Wbuiltin-declaration-mismatch]
1 | int sscanf(long, unsigned[], ...);
| ^~~~~~
pr88886.c: In function ‘a’:
pr88886.c:2:22: warning: passing argument 2 of ‘sscanf’ from incompatible
pointer type [-Wincompatible-pointer-types]
2 | void a() { sscanf(0, ""); }
| ^~
| |
| char *
pr88886.c:1:18: note: expected ‘unsigned int *’ but argument is of type ‘char
*’
1 | int sscanf(long, unsigned[], ...);
| ^~~~~~~~~~
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Subject: [Bug fortran/87939] [F18] Support STAT= and ERRMSG= specifiers to CRITICAL and TEAM statements
Date: Wed, 16 Jan 2019 23:16:00 -0000
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--- Comment #1 from Nathan Weeks <weeks at iastate dot edu> ---
My bad: END CRITICAL does not accept STAT= or ERRMSG= arguments in Fortran
2018.
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Subject: [Bug libstdc++/88881] std::filesystem::status gives bad results on mingw32
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--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #4)
> This bug is the cause of:
>
> FAIL: experimental/filesystem/operations/canonical.cc execution test
And also:
FAIL: experimental/filesystem/operations/temp_directory_path.cc execution test
because GetTempPathW always returns a directory with a trailing slash.
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Subject: [Bug fortran/88871] [9 regression] ICE segmentation fault in f951
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--- Comment #10 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Created attachment 45447
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=45447&action=edit
Patch that appears to work
This should fix the linked-list problem.
I'll probably submit tomorrow.
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Thomas Koenig <tkoenig at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Subject: [Bug libbacktrace/82857] libbacktrace: please support binaries stripped with dwz -m (following the .gnu_debugaltlink)
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--- Comment #6 from Tom de Vries <vries at gcc dot gnu.org> ---
Author: vries
Date: Thu Jan 17 00:08:05 2019
New Revision: 267996
URL: https://gcc.gnu.org/viewcvs?rev=267996&root=gcc&view=rev
Log:
[libbacktrace] Handle DW_FORM_GNU_strp_alt
Handle DW_FORM_GNU_strp_alt which references the .debug_str section in the
.gnu_debugaltlink file.
2019-01-17 Tom de Vries <tdevries@suse.de>
PR libbacktrace/82857
* dwarf.c (read_attribute): Handle DW_FORM_GNU_strp_alt
using altlink.
Modified:
trunk/libbacktrace/ChangeLog
trunk/libbacktrace/dwarf.c
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--- Comment #7 from Tom de Vries <vries at gcc dot gnu.org> ---
(In reply to Tom de Vries from comment #6)
> Author: vries
> Date: Thu Jan 17 00:08:05 2019
> New Revision: 267996
>
> URL: https://gcc.gnu.org/viewcvs?rev=267996&root=gcc&view=rev
> Log:
> [libbacktrace] Handle DW_FORM_GNU_strp_alt
>
> Handle DW_FORM_GNU_strp_alt which references the .debug_str section in the
> .gnu_debugaltlink file.
>
> 2019-01-17 Tom de Vries <tdevries@suse.de>
>
> PR libbacktrace/82857
> * dwarf.c (read_attribute): Handle DW_FORM_GNU_strp_alt
> using altlink.
>
> Modified:
> trunk/libbacktrace/ChangeLog
> trunk/libbacktrace/dwarf.c
This is a partial fix. The DW_FORM_GNU_ref_alt part is still to be reviewed:
"[PATCH 7/9] [libbacktrace] Handle DW_FORM_GNU_ref_alt" @
https://gcc.gnu.org/ml/gcc-patches/2018-12/msg00640.html .
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Subject: [Bug middle-end/86308] [7/8/9 Regression] ICE in verify_gimple calling an invalid index() declaration
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--- Comment #6 from Martin Sebor <msebor at gcc dot gnu.org> ---
Updated patch for GCC 9:
https://gcc.gnu.org/ml/gcc-patches/2019-01/msg00969.html
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Subject: [Bug c/88886] [9 Regression] ice in get_constant, at c-family/c-format.c:292
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |patch
--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
Updated patch for GCC 9:
https://gcc.gnu.org/ml/gcc-patches/2019-01/msg00969.html
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/86125] missing -Wbuiltin-declaration-mismatch on a mismatched return type
Date: Thu, 17 Jan 2019 00:44:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |patch
--- Comment #4 from Martin Sebor <msebor at gcc dot gnu.org> ---
Patch: https://gcc.gnu.org/ml/gcc-patches/2019-01/msg00969.html
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From: "law at redhat dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/88780] bogus -Wstringop-truncation for copying as many bytes from a string as its length
Date: Thu, 17 Jan 2019 01:21:00 -0000
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Jeffrey A. Law <law at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-01-17
CC| |law at redhat dot com
Ever confirmed|0 |1
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/88780] [8/9 Regression] bogus -Wstringop-truncation for copying as many bytes from a string as its length
Date: Thu, 17 Jan 2019 01:56:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |7.3.0
Summary|bogus -Wstringop-truncation |[8/9 Regression] bogus
|for copying as many bytes |-Wstringop-truncation for
|from a string as its length |copying as many bytes from
| |a string as its length
Known to fail| |8.2.0, 9.0
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
The Wstringop-truncation warning is new in GCC 8 and is not issued by GCC 7 so
I'm marking this a regression.
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Subject: [Bug middle-end/88781] [meta-bug] bogus/missing -Wstringop-truncation warnings
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Version|9.0 |8.0
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
-Wstringop-truncation was first introduced in GCC 8.
>From gcc-bugs-return-629523-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jan 17 02:49:39 2019
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Subject: [Bug c/88887] Warn on unexpected continuation of 'return' to new line in if statement.
Date: Thu, 17 Jan 2019 02:49:00 -0000
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-01-17
CC| |egallager at gcc dot gnu.org
Blocks| |87403
Ever confirmed|0 |1
--- Comment #1 from Eric Gallager <egallager at gcc dot gnu.org> ---
Confirmed.
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87403
[Bug 87403] [Meta-bug] Issues that suggest a new warning
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Subject: [Bug testsuite/87306] test case gcc.dg/vect/bb-slp-pow-1.c fails with its introduction in r263290
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--- Comment #3 from Kewen Lin <linkw at gcc dot gnu.org> ---
Author: linkw
Date: Thu Jan 17 03:03:38 2019
New Revision: 268003
URL: https://gcc.gnu.org/viewcvs?rev=268003&root=gcc&view=rev
Log:
PR target/87306
* gcc.dg/vect/bb-slp-pow-1.c: Modify to reflect that
the loop is not vectorized on POWER unless hardware
misaligned loads are available.
--T his line, and those below, will be ignored--
M gcc/testsuite/ChangeLog
M gcc/testsuite/gcc.dg/vect/bb-slp-pow-1.c
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.dg/vect/bb-slp-pow-1.c
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Subject: [Bug testsuite/87306] test case gcc.dg/vect/bb-slp-pow-1.c fails with its introduction in r263290
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--- Comment #4 from Kewen Lin <linkw at gcc dot gnu.org> ---
Author: linkw
Revision: 268003
Modified property: svn:log
Modified: svn:log at Thu Jan 17 03:24:27 2019
------------------------------------------------------------------------------
--- svn:log (original)
+++ svn:log Thu Jan 17 03:24:27 2019
@@ -1,10 +1,5 @@
-
PR target/87306
* gcc.dg/vect/bb-slp-pow-1.c: Modify to reflect that
the loop is not vectorized on POWER unless hardware
misaligned loads are available.
---T his line, and those below, will be ignored--
-
-M gcc/testsuite/ChangeLog
-M gcc/testsuite/gcc.dg/vect/bb-slp-pow-1.c
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