GNU bug report logs - #78193
Emacs compilation warnings with GCC 15 on Windows 10

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: MAN ONE <pRoMMMModE <at> outlook.com>
To: "bug-gnu-emacs <at> gnu.org" <bug-gnu-emacs <at> gnu.org>
Subject: Emacs compilation warnings with GCC 15 on Windows 10 
Date: Thu, 1 May 2025 12:40:28 +0000

[Message part 1 (text/plain, inline)]

Hi, the attachment is a build log of compiling Emacs on Windows 10 in Msys2's
UCRT environment, most of the warnings are from windows related files, so I
think it may be helpful to report it.

===========================================================================

Output of `gcc -v' :

Using built-in specs.
COLLECT_GCC=C:\msys64\ucrt64\bin\gcc.exe
COLLECT_LTO_WRAPPER=C:/msys64/ucrt64/bin/../lib/gcc/x86_64-w64-mingw32/15.1.0/lto-wrapper.exe
Target: x86_64-w64-mingw32
Configured with: ../gcc-15.1.0/configure --prefix=/ucrt64 --with-local-prefix=/ucrt64/local --with-native-system-header-dir=/ucrt64/include --libexecdir=/ucrt64/lib --enable-bootstrap --enable-checking=release --with-arch=nocona --with-tune=generic --enable-mingw-wildcard --enable-languages=c,lto,c++,fortran,ada,objc,obj-c++,jit --enable-shared --enable-static --enable-libatomic --enable-threads=posix --enable-graphite --enable-fully-dynamic-string --enable-libstdcxx-backtrace=yes --enable-libstdcxx-filesystem-ts --enable-libstdcxx-time --disable-libstdcxx-pch --enable-lto --enable-libgomp --disable-libssp --disable-multilib --disable-rpath --disable-win32-registry --disable-nls --disable-werror --disable-symvers --with-libiconv --with-system-zlib --with-gmp=/ucrt64 --with-mpfr=/ucrt64 --with-mpc=/ucrt64 --with-isl=/ucrt64 --with-pkgversion='Rev1, Built by MSYS2 project' --with-bugurl=https://github.com/msys2/MINGW-packages/issues --with-gnu-as --with-gnu-ld --disable-libstdcxx-debug --enable-plugin --with-boot-ldflags=-static-libstdc++ --with-stage1-ldflags=-static-libstdc++
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 15.1.0 (Rev1, Built by MSYS2 project) 

===========================================================================
Emacs is configured with:

In GNU Emacs 31.0.50 (build 1, x86_64-w64-mingw32) of 2025-05-01 built
 on LILILILILILILIL
Repository revision: b9632a9049d07de3a0d6f0ae005a28b38825ff82
Repository branch: master
Windowing system distributor 'Microsoft Corp.', version 10.0.19045
System Description: Microsoft Windows 10 Pro (v10.0.2009.19045.5737)

Configured using:
 'configure --without-dbus --without-pop 'CFLAGS=-O2 -march=native''

Configured features:
ACL GIF GMP GNUTLS HARFBUZZ JPEG LCMS2 LIBXML2 MODULES NATIVE_COMP
NOTIFY W32NOTIFY PDUMPER PNG RSVG SOUND SQLITE3 THREADS TIFF
TOOLKIT_SCROLL_BARS TREE_SITTER WEBP XPM ZLIB

[build-log.txt (text/plain, attachment)]

Message #8 received at 78193 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: MAN ONE <pRoMMMModE <at> outlook.com>
Cc: 78193 <at> debbugs.gnu.org
Subject: Re: bug#78193: Emacs compilation warnings with GCC 15 on Windows 10
Date: Sun, 01 Jun 2025 12:10:26 +0300

> From: MAN ONE <pRoMMMModE <at> outlook.com>
> Date: Thu, 1 May 2025 12:40:28 +0000
> 
> Hi, the attachment is a build log of compiling Emacs on Windows 10 in Msys2's
> UCRT environment, most of the warnings are from windows related files, so I
> think it may be helpful to report it.

Thanks, I hope I've now fixed most of those.

Message #11 received at 78193 <at> debbugs.gnu.org (full text, mbox):

From: Corwin Brust <corwin <at> bru.st>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: 78193 <at> debbugs.gnu.org, MAN ONE <pRoMMMModE <at> outlook.com>
Subject: Re: bug#78193: Emacs compilation warnings with GCC 15 on Windows 10
Date: Sun, 1 Jun 2025 07:28:42 -0500

On Sun, Jun 1, 2025 at 4:10 AM Eli Zaretskii <eliz <at> gnu.org> wrote:
>
> > From: MAN ONE <pRoMMMModE <at> outlook.com>
> > Date: Thu, 1 May 2025 12:40:28 +0000
> >
> > Hi, the attachment is a build log of compiling Emacs on Windows 10 in Msys2's
> > UCRT environment, most of the warnings are from windows related files, so I
> > think it may be helpful to report it.
>
> Thanks, I hope I've now fixed most of those.
>

FWIW, my automated MSYS2/MINGW64 builds from the development branch
have gone, overnight, from 148 warnings to 29.  (Let me know if
sharing more detail is helpful; I'm assuming it could simply confuse
things since the focus here seems to have been UCTR builds..).   The
output (binaries) for these builds are on my personal site, in case
they may be helpful.  I have several years of build logs also on the
off chance deep analysis of these would prove interesting at some
point however I haven't made those available online so far.
https://corwin.bru.st/emacs-31

Message #14 received at 78193 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Corwin Brust <corwin <at> bru.st>
Cc: 78193 <at> debbugs.gnu.org, pRoMMMModE <at> outlook.com
Subject: Re: bug#78193: Emacs compilation warnings with GCC 15 on Windows 10
Date: Sun, 01 Jun 2025 15:51:43 +0300

> From: Corwin Brust <corwin <at> bru.st>
> Date: Sun, 1 Jun 2025 07:28:42 -0500
> Cc: MAN ONE <pRoMMMModE <at> outlook.com>, 78193 <at> debbugs.gnu.org
> 
> On Sun, Jun 1, 2025 at 4:10 AM Eli Zaretskii <eliz <at> gnu.org> wrote:
> >
> > > From: MAN ONE <pRoMMMModE <at> outlook.com>
> > > Date: Thu, 1 May 2025 12:40:28 +0000
> > >
> > > Hi, the attachment is a build log of compiling Emacs on Windows 10 in Msys2's
> > > UCRT environment, most of the warnings are from windows related files, so I
> > > think it may be helpful to report it.
> >
> > Thanks, I hope I've now fixed most of those.
> >
> 
> FWIW, my automated MSYS2/MINGW64 builds from the development branch
> have gone, overnight, from 148 warnings to 29.  (Let me know if
> sharing more detail is helpful; I'm assuming it could simply confuse
> things since the focus here seems to have been UCTR builds..).

Feel free to post the warnings here, I will see what can be done about
them.

Thanks.

Message #17 received at 78193 <at> debbugs.gnu.org (full text, mbox):

From: MAN ONE <pRoMMMModE <at> outlook.com>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: "78193 <at> debbugs.gnu.org" <78193 <at> debbugs.gnu.org>
Subject: Re: bug#78193: Emacs compilation warnings with GCC 15 on Windows 10
Date: Tue, 3 Jun 2025 08:58:33 +0000

[Message part 1 (text/plain, inline)]

I attached the new build log, compiled using commit 50e3bce315eb499917c1d208f87f84315f1a8b4e, indeed most warnings has gone.

Btw, should I keep using `make V=1` ?

[build.log (application/octet-stream, attachment)]

Message #22 received at 78193-done <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: MAN ONE <pRoMMMModE <at> outlook.com>
Cc: 78193-done <at> debbugs.gnu.org
Subject: Re: bug#78193: Emacs compilation warnings with GCC 15 on Windows 10
Date: Sat, 14 Jun 2025 16:58:58 +0300

> From: MAN ONE <pRoMMMModE <at> outlook.com>
> CC: "78193 <at> debbugs.gnu.org" <78193 <at> debbugs.gnu.org>
> Date: Tue, 3 Jun 2025 08:58:33 +0000
> 
> I attached the new build log, compiled using commit 50e3bce315eb499917c1d208f87f84315f1a8b4e, indeed most warnings has gone.

Thanks, I fixed the warnings that I care about.  The rest should be
ignored.

> Btw, should I keep using `make V=1` ?

Not necessary, thanks.

I'm therefore closing this bug.

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