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Today's Topics:
1. [mingw] #40315: c++17 std::aligned_alloc (MinGW Notification List)
2. [mingw] #38607: Improved standards support for aligned memory
allocators (MinGW Notification List)
3. [mingw] #40267: older version of MSYS dos2unix installed
(MinGW Notification List)
----------------------------------------------------------------------
Message: 1
Date: Fri, 01 May 2020 17:37:49 +0100
From: MinGW Notification List <[email protected]>
To: OSDN Ticket System <[email protected]>
Subject: [MinGW-Notify] [mingw] #40315: c++17 std::aligned_alloc
Message-ID: <[email protected]>
Content-Type: text/plain; charset=UTF-8
#40315: c++17 std::aligned_alloc
Open Date: 2020-04-10 05:55
Last Update: 2020-05-01 17:37
URL for this Ticket:
https://osdn.net//projects/mingw/ticket/40315
RSS feed for this Ticket:
https://osdn.net/ticket/ticket_rss.php?group_id=3917&tid=40315
---------------------------------------------------------------------
Last Changes/Comment on this Ticket:
2020-05-01 17:37 Updated by: keith
* Status Update from Open to Closed
* Owner Update from (None) to keith
* Resolution Update from None to Fixed
* Component Update from GCC to WSL
Comment:
As of mingwrt-5.3.1, published on 30-Apr-2020 as a component of wsl-5.3.1, both
C11's aligned_alloc(), and C++17's corresponding std::aligned_alloc() are
supported OOTB, as is POSIX.1-2001's posix_memalign().
---------------------------------------------------------------------
Ticket Status:
Reporter: drakbar
Owner: keith
Type: Issues
Status: Closed
Priority: 5 - Medium
MileStone: (None)
Component: WSL
Severity: 5 - Medium
Resolution: Fixed
---------------------------------------------------------------------
Ticket details:
According to cppreference, the function std::aligned_alloc is apart of C++17.
When trying to compile the example code found at that page, the following
compilation error occurs:
src code
1. #include <cstdio>
2. #include <cstdlib>
3.
4. int main()
5. {
6. int* p1 = static_cast<int*>(std::malloc(10*sizeof *p1));
7. std::printf("default-aligned address: %p\n", static_cast<void*>(p1));
8. std::free(p1);
9.
10. int* p2 = static_cast<int*>(std::aligned_alloc(1024, 1024));
11. std::printf("1024-byte aligned address: %p\n", static_cast<void*>(p2));
12. std::free(p2);
13. }
compilation output
$g++ -std=c++17 alignment.cpp -o main
alignment.cpp: In function 'int main()':
alignment.cpp:10:38: error: 'aligned_alloc' is not a member of 'std'
10 | int* p2 = static_cast<int*>(std::aligned_alloc(1024, 1024));
gcc version
Target: x86_64-w64-mingw32
Configured with: ../gcc-9.3.0/configure --prefix=/mingw64
--with-local-prefix=/mingw64/local --build=x86_64-w64-mingw32
--host=x86_64-w64-mingw32 --target=x86_64-w64-mingw32
--with-native-system-header-dir=/mingw64/x86_64-w64-mingw32/include
--libexecdir=/mingw64/lib --enable-bootstrap --with-arch=x86-64
--with-tune=generic --enable-languages=c,lto,c++,fortran,ada,objc,obj-c++
--enable-shared --enable-static --enable-libatomic --enable-threads=posix
--enable-graphite --enable-fully-dynamic-string
--enable-libstdcxx-filesystem-ts=yes --enable-libstdcxx-time=yes
--disable-libstdcxx-pch --disable-libstdcxx-debug --disable-isl-version-check
--enable-lto --enable-libgomp --disable-multilib --enable-checking=release
--disable-rpath --disable-win32-registry --disable-nls --disable-werror
--disable-symvers --enable-plugin --with-libiconv --with-system-zlib
--with-gmp=/mingw64 --with-mpfr=/mingw64 --with-mpc=/mingw64
--with-isl=/mingw64 --with-pkgversion='Rev1, Built by MSYS2 project'
--with-bugurl=https://sourceforge.net/projects/msys2 --with-gnu-as --with-gnu-ld
Thread model: posix
gcc version 9.3.0 (Rev1, Built by MSYS2 project)
platform
Windows 10 Build: 18362.720
linker version
GNU ld (GNU Binutils) 2.34
mingw version
not quite sure which number is the relevant one in _mingw.h
??
build environment
I have tested using both windows command prompt and the msys-w64 shell, and
both yield the same result
MINGW64_NT-10.0-18362 3.0.7-338.x86_64 2019-07-11 10:58 UTC x86_64 Msys
--
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Project URL: https://osdn.net/projects/mingw/
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URL for this Ticket:
https://osdn.net/projects/mingw/ticket/40315
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------------------------------
Message: 2
Date: Fri, 01 May 2020 17:40:28 +0100
From: MinGW Notification List <[email protected]>
To: OSDN Ticket System <[email protected]>
Subject: [MinGW-Notify] [mingw] #38607: Improved standards support for
aligned memory allocators
Message-ID: <[email protected]>
Content-Type: text/plain; charset=UTF-8
#38607: Improved standards support for aligned memory allocators
Open Date: 2018-09-17 19:25
Last Update: 2020-05-01 17:40
URL for this Ticket:
https://osdn.net//projects/mingw/ticket/38607
RSS feed for this Ticket:
https://osdn.net/ticket/ticket_rss.php?group_id=3917&tid=38607
---------------------------------------------------------------------
Last Changes/Comment on this Ticket:
2020-05-01 17:40 Updated by: keith
* Status Update from Open to Closed
* Owner Update from (None) to keith
* Resolution Update from None to Accepted
Comment:
As of mingwrt-5.3.1, published on 30-Apr-2020 as a component of wsl-5.3.1, both
C11's aligned_alloc(), and C++17's corresponding std::aligned_alloc() are now
supported OOTB, as is POSIX.1-2001's posix_memalign().
---------------------------------------------------------------------
Ticket Status:
Reporter: keith
Owner: keith
Type: Feature Request
Status: Closed
Priority: 5 - Medium
MileStone: (None)
Component: WSL
Severity: 5 - Medium
Resolution: Accepted
---------------------------------------------------------------------
Ticket details:
Microsoft introduced _aligned_malloc(), and associated functions, with
MSVCR70.DLL. Although subsequently supported in MSVCRT.DLL, from WinXP onwards,
exposure of these APIs interferes with a clean build of GCC — not only insofar
as, having detected presence of the APIs, GCC would become dependent on WinXP
and later, thus needlessly breaking legacy support, but furthermore, the GCC
sources neglect to include the requisite <malloc.h> header file, and thus do
not build cleanly.
Legacy support for similar APIs was added to MinGW, in 2003/2004, under feature
request #260; however, it may be ill-advised to make GCC dependent on these
MinGW specific APIs, for the following reasons:—
1. A patch, to incorporate them, would be unlikely to be accepted upstream.
2. If the APIs are not detected, GCC will provide its own replacement
functions.
3. A review reveals potential flaws in the MinGW implementation.
Consequently, I suggest:—
1. **Not** exposing the Microsoft APIs in libmsvcrt.a
2. Reworking the MinGW implementation, to address potential flaws.
3. Consider adding support for ISO-C11's aligned_alloc() and POSIX.1's
posix_memalign() APIs.
--
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/
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------------------------------
Message: 3
Date: Fri, 01 May 2020 19:52:05 +0100
From: MinGW Notification List <[email protected]>
To: OSDN Ticket System <[email protected]>
Subject: [MinGW-Notify] [mingw] #40267: older version of MSYS dos2unix
installed
Message-ID: <[email protected]>
Content-Type: text/plain; charset=UTF-8
#40267: older version of MSYS dos2unix installed
Open Date: 2020-03-19 09:05
Last Update: 2020-05-01 19:52
URL for this Ticket:
https://osdn.net//projects/mingw/ticket/40267
RSS feed for this Ticket:
https://osdn.net/ticket/ticket_rss.php?group_id=3917&tid=40267
---------------------------------------------------------------------
Last Changes/Comment on this Ticket:
2020-05-01 19:52 Updated by: keith
* Owner Update from (None) to cstrauss
* Resolution Update from None to Fixed
Comment:
It appears that the repository was updated, but the corresponding
msys-package-list.xml.lzma and msys-dos2unix.xml.lzma files were never updated
in the OSDN catalogue. I even have locally updated copies of both of these
.lzma catalogue files, in my build from the OSDN repository, but since I am
neither the maintainer of dos2unix, nor of MSYS itself, they are not included
in my publication schedule. Nonetheless, I have now scheduled them for one-time
publication, and pushed them to the OSDN catalogue.
This issue should now be fixed, but I leaving the ticket open, for the
attention of the MSYS maintainer.
---------------------------------------------------------------------
Ticket Status:
Reporter: tamir_evan
Owner: cstrauss
Type: Issues
Status: Open [Owner assigned]
Priority: 5 - Medium
MileStone: (None)
Component: INSTALLER
Severity: 5 - Medium
Resolution: Fixed
---------------------------------------------------------------------
Ticket details:
If I download the installer from SourceForge (https://sourceforge.net/projects/
mingw/files/Installer/mingw-get-setup.exe/download ), run it, and when I get to
the MinGW Installation Manager GUI I choose to install msys-dos2unix, version
7.4.0 gets installed
If I download the installer from OSDN (https://osdn.net/projects/mingw/
downloads/68260/mingw-get-setup.exe/ ), run it, and when I get to the MinGW
Installation Manager GUI I choose to install msys-dos2unix, version 7.3.2 gets
installed.
Running mingw-get update, then migw-get upgrade, doesn't seem to affect the
version installed.
Curiously, looking at my local copy of msys-dos2unix.xml (C:\MinGW\var\lib\
mingw-get\data\msys-dos2unix.xml), I see dos2unix-7.3.2-1 as the most recent
version, whereas in the source code online (https://osdn.net/projects/mingw/scm
/git/mingw-dist/blobs/5a8b6b0ff835e46186af512c4adbc0cbd96662ba/msys/
msys-dos2unix.xml ), dos2unix-7.4.0-1 is the most recent version.
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MinGW - Minimalist GNU for Windows Project is hosted on OSDN
Project URL: https://osdn.net/projects/mingw/
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URL for this Ticket:
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