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Today's Topics:
1. [mingw] #39757: Compilation with GNU-C++ creates multiple
definitions of vsnprintf() (MinGW Notification List)
2. [mingw] #39757: Compilation with GNU-C++ creates multiple
definitions of vsnprintf() (MinGW Notification List)
3. [SCM] mingw-org-wsl (mingw) branch, 5.2-trunk, updated.
3c7767ef789712844a47d4e5360a65f542753694 (MinGW Notification List)
----------------------------------------------------------------------
Message: 1
Date: Wed, 13 Nov 2019 14:00:46 +0000
From: MinGW Notification List <[email protected]>
To: OSDN Ticket System <[email protected]>
Subject: [MinGW-Notify] [mingw] #39757: Compilation with GNU-C++
creates multiple definitions of vsnprintf()
Message-ID: <[email protected]>
Content-Type: text/plain; charset=UTF-8
#39757: Compilation with GNU-C++ creates multiple definitions of vsnprintf()
Open Date: 2019-11-13 14:00
Last Update: 2019-11-13 14:00
URL for this Ticket:
https://osdn.net//projects/mingw/ticket/39757
RSS feed for this Ticket:
https://osdn.net/ticket/ticket_rss.php?group_id=3917&tid=39757
---------------------------------------------------------------------
Last Changes/Comment on this Ticket:
2019-11-13 14:00 Updated by: keith
* New Ticket "Compilation with GNU-C++ creates multiple definitions of
vsnprintf
()" created
---------------------------------------------------------------------
Ticket Status:
Reporter: keith
Owner: (None)
Type: Issues
Status: Open
Priority: 5 - Medium
MileStone: (None)
Component: WSL
Severity: 5 - Medium
Resolution: None
---------------------------------------------------------------------
Ticket details:
As reported in this pair of e-mail threads:
• https://osdn.net/projects/mingw/lists/archive/users/2019-August/000333.html
• https://osdn.net/projects/mingw/lists/archive/users/2019-August/000335.html
compilation of any C++ translation unit which refers, either directly or
indirectly, to vsnprintf(), will result in link failure, due to multiple public
definitions of this symbol. The issue is clearly illustrated by the following
code, (abstracted from the latter e-mail report):
1. #include <stdio.h>
2. #include <stdarg.h>
3.
4. void debug_log(const char *fmt, ...) {
5. va_list args;
6. va_start(args, fmt);
7. char buf[1+vsnprintf(NULL, 0, fmt, args)];
8. vsnprintf(buf, sizeof buf, fmt, args);
9. va_end(args);
10. }
11.
12. main() {
13. printf("mingw-link\n");
14. }
compilation of which yields:
$ g++ -o mingw-link.exe main.cpp
c:/mingw/bin/../lib/gcc/mingw32/8.2.0/../../../../mingw32/bin/ld.exe:
c:/mingw/bin/../lib/gcc/mingw32/8.2.0/../../../libmingwex.a(vsnprintf.o):(.text+0x0):
multiple definition of `vsnprintf';
main.cpp:(.text$vsnprintf[_vsnprintf]+0x0): first defined here
collect2.exe: error: ld returned 1 exit status
--
Ticket information of MinGW - Minimalist GNU for Windows project
MinGW - Minimalist GNU for Windows Project is hosted on OSDN
Project URL: https://osdn.net/projects/mingw/
OSDN: https://osdn.net
URL for this Ticket:
https://osdn.net/projects/mingw/ticket/39757
RSS feed for this Ticket:
https://osdn.net/ticket/ticket_rss.php?group_id=3917&tid=39757
------------------------------
Message: 2
Date: Wed, 13 Nov 2019 14:20:10 +0000
From: MinGW Notification List <[email protected]>
To: OSDN Ticket System <[email protected]>
Subject: [MinGW-Notify] [mingw] #39757: Compilation with GNU-C++
creates multiple definitions of vsnprintf()
Message-ID: <[email protected]>
Content-Type: text/plain; charset=UTF-8
#39757: Compilation with GNU-C++ creates multiple definitions of vsnprintf()
Open Date: 2019-11-13 14:00
Last Update: 2019-11-13 14:20
URL for this Ticket:
https://osdn.net//projects/mingw/ticket/39757
RSS feed for this Ticket:
https://osdn.net/ticket/ticket_rss.php?group_id=3917&tid=39757
---------------------------------------------------------------------
Last Changes/Comment on this Ticket:
2019-11-13 14:20 Updated by: keith
* Owner Update from (None) to keith
* Severity Update from 5 - Medium to 8
* Priority Update from 5 - Medium to 7
Comment:
This is a critical regression, introduced in mingwrt-5.2.2; it arises from
changes in <stdio.h>, to resolve issue #39224, which cause g++ to emit multiple
publicly visible instances of vsnprintf(), each of which refers to an extern
implementation of __mingw_vsnprintf(), and conflicts with its publicly visible
vsprintf() alias, within the translation unit in which __mingw_vsnprintf()
itself is implemented.
---------------------------------------------------------------------
Ticket Status:
Reporter: keith
Owner: keith
Type: Issues
Status: Open [Owner assigned]
Priority: 7
MileStone: (None)
Component: WSL
Severity: 8
Resolution: None
---------------------------------------------------------------------
Ticket details:
As reported in this pair of e-mail threads:
• https://osdn.net/projects/mingw/lists/archive/users/2019-August/000333.html
• https://osdn.net/projects/mingw/lists/archive/users/2019-August/000335.html
compilation of any C++ translation unit which refers, either directly or
indirectly, to vsnprintf(), will result in link failure, due to multiple public
definitions of this symbol. The issue is clearly illustrated by the following
code, (abstracted from the latter e-mail report):
1. #include <stdio.h>
2. #include <stdarg.h>
3.
4. void debug_log(const char *fmt, ...) {
5. va_list args;
6. va_start(args, fmt);
7. char buf[1+vsnprintf(NULL, 0, fmt, args)];
8. vsnprintf(buf, sizeof buf, fmt, args);
9. va_end(args);
10. }
11.
12. main() {
13. printf("mingw-link\n");
14. }
compilation of which yields:
$ g++ -o mingw-link.exe main.cpp
c:/mingw/bin/../lib/gcc/mingw32/8.2.0/../../../../mingw32/bin/ld.exe:
c:/mingw/bin/../lib/gcc/mingw32/8.2.0/../../../libmingwex.a(vsnprintf.o):(.text+0x0):
multiple definition of `vsnprintf';
main.cpp:(.text$vsnprintf[_vsnprintf]+0x0): first defined here
collect2.exe: error: ld returned 1 exit status
--
Ticket information of MinGW - Minimalist GNU for Windows project
MinGW - Minimalist GNU for Windows Project is hosted on OSDN
Project URL: https://osdn.net/projects/mingw/
OSDN: https://osdn.net
URL for this Ticket:
https://osdn.net/projects/mingw/ticket/39757
RSS feed for this Ticket:
https://osdn.net/ticket/ticket_rss.php?group_id=3917&tid=39757
------------------------------
Message: 3
Date: Thu, 14 Nov 2019 03:38:12 +0900
From: MinGW Notification List <[email protected]>
To: [email protected]
Subject: [MinGW-Notify] [SCM] mingw-org-wsl (mingw) branch, 5.2-trunk,
updated. 3c7767ef789712844a47d4e5360a65f542753694
Message-ID: <[email protected]>
This is an automated email from the git hooks/post-receive script. It was
generated because a ref change was pushed to "mingw-org-wsl" repository
containing the "mingw" project.
The branch, 5.2-trunk has been updated
via 3c7767ef789712844a47d4e5360a65f542753694 (commit)
from 867d8d514f7343c07016dd5711f67023f397e0a4 (commit)
Those revisions listed above that are new to this repository have
not appeared on any other notification email; so we list those
revisions in full, below.
- Log -----------------------------------------------------------------
commit 3c7767ef789712844a47d4e5360a65f542753694
Author: Keith Marshall <[email protected]>
Date: Sat Oct 26 10:33:12 2019 +0100
Fix MinGW-Issue #39757; avoid multiple vsnprintf() definitions.
-----------------------------------------------------------------------
Summary of changes:
mingwrt/ChangeLog | 8 ++++++++
mingwrt/include/stdio.h | 22 +++++++++++-----------
2 files changed, 19 insertions(+), 11 deletions(-)
hooks/post-receive
--
mingw-org-wsl (mingw)
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