permissions: 0.618
other: 0.569
KVM: 0.558
device: 0.552
graphic: 0.546
performance: 0.538
debug: 0.538
network: 0.523
boot: 0.514
PID: 0.513
socket: 0.510
files: 0.493
vnc: 0.490
semantic: 0.352

Compilation on MSYS2/MinGW-w64 fails with error: "__USE_MINGW_ANSI_STDIO" redefined 

Compilation against latest GIT version fails at the following step:

  CC      qga/commands.o
In file included from qga/commands.c:13:
C:/Tempy-chan/qemu/include/qemu/osdep.h:97: error: "__USE_MINGW_ANSI_STDIO" redefined [-Werror]
 #define __USE_MINGW_ANSI_STDIO 1

In file included from C:/msys64/mingw64/x86_64-w64-mingw32/include/vadefs.h:9,
                 from C:/msys64/mingw64/x86_64-w64-mingw32/include/_mingw_stdarg.h:14,
                 from C:/msys64/mingw64/x86_64-w64-mingw32/include/stdarg.h:140,
                 from C:/msys64/mingw64/lib/gcc/x86_64-w64-mingw32/8.3.0/include/stdarg.h:1,
                 from C:/Tempy-chan/qemu/include/qemu/osdep.h:88,
                 from qga/commands.c:13:
C:/msys64/mingw64/x86_64-w64-mingw32/include/_mingw.h:431: note: this is the location of the previous definition
 #define __USE_MINGW_ANSI_STDIO 0      /* was not defined so it should be 0 */

cc1.exe: all warnings being treated as errors
make: *** [/c/Tempy-chan/qemu/rules.mak:69: qga/commands.o] Error 1

Passing --extra-cflags="-D__USE_MINGW_ANSI_STDIO" to configure resolves the error. Digging deeper in x86_64-w64-mingw32/include/_mingw.h, it looks like __USE_MINGW_ANSI_STDIO is only defined for _GNU_SOURCE in C++ compilation. With C only code it's ignored and doesn't define __USE_MINGW_ANSI_STDIO as expected:

/* We are activating __USE_MINGW_ANSI_STDIO for various define indicators.
   Note that we enable it also for _GNU_SOURCE in C++, but not for C case. */
#if (defined (_POSIX) || defined (_POSIX_SOURCE) || defined (_POSIX_C_SOURCE) \
     || defined (_ISOC99_SOURCE) \
     || defined (_XOPEN_SOURCE) || defined (_XOPEN_SOURCE_EXTENDED) \
     || (defined (_GNU_SOURCE) && defined (__cplusplus)) \
     || defined (_SVID_SOURCE)) \
    && !defined(__USE_MINGW_ANSI_STDIO)
/* Enable __USE_MINGW_ANSI_STDIO if _POSIX defined
 * and If user did _not_ specify it explicitly... */
#  define __USE_MINGW_ANSI_STDIO			1
#endif

MinGW-w64 toolchain version:

$ pacman -Ss mingw-w64-x86_64-toolchain
mingw64/mingw-w64-x86_64-binutils 2.30-5 (mingw-w64-x86_64-toolchain) [installed]
    A set of programs to assemble and manipulate binary and object files (mingw-w64)
mingw64/mingw-w64-x86_64-crt-git 7.0.0.5397.291c4f8d-1 (mingw-w64-x86_64-toolchain) [installed]
    MinGW-w64 CRT for Windows
mingw64/mingw-w64-x86_64-gcc 8.3.0-2 (mingw-w64-x86_64-toolchain) [installed]
    GNU Compiler Collection (C,C++,OpenMP) for MinGW-w64
mingw64/mingw-w64-x86_64-gcc-ada 8.3.0-2 (mingw-w64-x86_64-toolchain) [installed]
    GNU Compiler Collection (Ada) for MinGW-w64
mingw64/mingw-w64-x86_64-gcc-fortran 8.3.0-2 (mingw-w64-x86_64-toolchain) [installed]
    GNU Compiler Collection (Fortran) for MinGW-w64
mingw64/mingw-w64-x86_64-gcc-libgfortran 8.3.0-2 (mingw-w64-x86_64-toolchain) [installed]
    GNU Compiler Collection (libgfortran) for MinGW-w64
mingw64/mingw-w64-x86_64-gcc-libs 8.3.0-2 (mingw-w64-x86_64-toolchain) [installed]
    GNU Compiler Collection (libraries) for MinGW-w64
mingw64/mingw-w64-x86_64-gcc-objc 8.3.0-2 (mingw-w64-x86_64-toolchain) [installed]
    GNU Compiler Collection (ObjC,Obj-C++) for MinGW-w64
mingw64/mingw-w64-x86_64-gdb 8.2.1-2 (mingw-w64-x86_64-toolchain) [installed]
    GNU Debugger (mingw-w64)
mingw64/mingw-w64-x86_64-headers-git 7.0.0.5397.291c4f8d-1 (mingw-w64-x86_64-toolchain) [installed]
    MinGW-w64 headers for Windows
mingw64/mingw-w64-x86_64-libmangle-git 7.0.0.5230.69c8fad6-1 (mingw-w64-x86_64-toolchain) [installed]
    MinGW-w64 libmangle
mingw64/mingw-w64-x86_64-libwinpthread-git 7.0.0.5325.11a5459d-1 (mingw-w64-x86_64-toolchain) [installed]
    MinGW-w64 winpthreads library
mingw64/mingw-w64-x86_64-make 4.2.1-2 (mingw-w64-x86_64-toolchain) [installed]
    GNU make utility to maintain groups of programs (mingw-w64)
mingw64/mingw-w64-x86_64-pkg-config 0.29.2-1 (mingw-w64-x86_64-toolchain) [installed]
    A system for managing library compile/link flags (mingw-w64)
mingw64/mingw-w64-x86_64-tools-git 7.0.0.5394.0dfb3d3f-1 (mingw-w64-x86_64-toolchain) [installed]
    MinGW-w64 tools
mingw64/mingw-w64-x86_64-winpthreads-git 7.0.0.5325.11a5459d-1 (mingw-w64-x86_64-toolchain) [installed]
    MinGW-w64 winpthreads library
mingw64/mingw-w64-x86_64-winstorecompat-git 7.0.0.5394.0dfb3d3f-1 (mingw-w64-x86_64-toolchain) [installed]
    MinGW-w64 winRT compat library


Hi; thanks for this bug report. It should be fixed by commit 946376c21be1cd9dcc3c7 in git master, which will be in the 4.1 release.