bug#62792: Emacs 29.0.90 build fails

[Tak Ota]

Here is my MinGW information.

ota@Tak-Dell-XPS15 /c/d/pub/emacs/emacs-29.0.90
$ which gcc
/mingw/bin/gcc.exe

ota@Tak-Dell-XPS15 /c/d/pub/emacs/emacs-29.0.90
$ gcc --version
gcc.exe (GCC) 5.3.0
Copyright (C) 2015 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.


ota@Tak-Dell-XPS15 /c/d/pub/emacs/emacs-29.0.90
$ gcc -v
Using built-in specs.
COLLECT_GCC=C:\MinGW\bin\gcc.exe
COLLECT_LTO_WRAPPER=c:/mingw/bin/../libexec/gcc/mingw32/5.3.0/lto-wrapper.exe
Target: mingw32
Configured with: ../src/gcc-5.3.0/configure --build=x86_64-pc-linux-gnu --host=mingw32 --prefix=/mingw --disable-win32-registry --target=mingw32 --with-arch=i586 --enable-languages=c,c++,objc,obj-c++,fortran,ada --enable-static --enable-shared --enable-threads --with-dwarf2 --disable-sjlj-exceptions --enable-version-specific-runtime-libs --with-libintl-prefix=/mingw --enable-libstdcxx-debug --with-tune=generic --enable-libgomp --disable-libvtv --enable-nls : (reconfigured) ../src/gcc-5.3.0/configure --build=x86_64-pc-linux-gnu --host=mingw32 --prefix=/mingw --disable-win32-registry --target=mingw32 --with-arch=i586 --enable-languages=c,c++,objc,obj-c++,fortran,ada --enable-static --enable-shared --enable-threads --with-dwarf2 --disable-sjlj-exceptions --enable-version-specific-runtime-libs --with-libiconv-prefix=/mingw --with-libintl-prefix=/mingw --enable-libstdcxx-debug --with-tune=generic --enable-libgomp --disable-libvtv --enable-nls
Thread model: win32
gcc version 5.3.0 (GCC)

On Wed, Apr 12, 2023 at 8:32 AM Eli Zaretskii <eliz@gnu.org> wrote:

> From: Tak Ota <takaaki.ota@gmail.com>
> Date: Tue, 11 Apr 2023 11:16:28 -0700
>
> When attempted to build using MinGW the next section of code in src/w32.c conflicts with the definition
> in MinGW/include/wincon.h

Thank you for your report.

Please show the exact compilation error message you get due to this
conflict.  I don't see any errors here, and Emacs 29 compiles with
MinGW flawlessly here.

> This typedef was not in src/w32.c of Emacs 28.2.
>
> #if _WIN32_WINNT < 0x0501
> typedef struct
> {
>   DWORD nFont;
>   COORD dwFontSize;
> } CONSOLE_FONT_INFO;
> #endif

Also, which flavor of MinGW and which version are you using?  The
above should be only visible with _WIN32_WINNT that is smaller than
0x0501, which should not happen with latest MinGW64.  And looking at
the latest MinGW64 headers, I see the definition of CONSOLE_FONT_INFO
structure there that is identical to the above, so how can it
conflict?