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