Libvirt / GNULIB failures using Mingw64 toolchain

[Daniel P. Berrange]

With current Libvirt master + GNULIB (77cef20) I can successfully
compile using the Mingw32 toolchain. If attempting to use the
alternative Mingw64 toolchain, however, I get a number of errors.

On both x86_64-w64-mingw32 and i686-w64-mingw32 I see the
following:

  CC     fstat.lo
../../../gnulib/lib/fstat.c:27:0: warning: "stat" redefined [enabled by default]
In file included from ./sys/stat.h:32:0,
                 from ../../../gnulib/lib/fstat.c:25:
/usr/x86_64-w64-mingw32/sys-root/mingw/include/sys/stat.h:258:0: note: this is 
the location of the previous definition
../../../gnulib/lib/fstat.c:28:0: warning: "fstat" redefined [enabled by 
default]
In file included from ./sys/stat.h:32:0,
                 from ../../../gnulib/lib/fstat.c:25:
/usr/x86_64-w64-mingw32/sys-root/mingw/include/sys/stat.h:259:0: note: this is 
the location of the previous definition



  CC     stat.lo
../../../gnulib/lib/stat.c:32:0: warning: "stat" redefined [enabled by default]
In file included from ./sys/stat.h:32:0,
                 from ../../../gnulib/lib/stat.c:27:
/usr/x86_64-w64-mingw32/sys-root/mingw/include/sys/stat.h:258:0: note: this is 
the location of the previous definition


  CC     stdio-read.lo
../../../gnulib/lib/stdio-read.c:102:1: error: redefinition of 'vscanf'
In file included from ./stdio.h:43:0,
                 from ../../../gnulib/lib/stdio-read.c:21:
/usr/x86_64-w64-mingw32/sys-root/mingw/include/stdio.h:397:7: note: previous 
definition of 'vscanf' was here
../../../gnulib/lib/stdio-read.c:108:1: error: redefinition of 'vfscanf'
In file included from ./stdio.h:43:0,
                 from ../../../gnulib/lib/stdio-read.c:21:
/usr/x86_64-w64-mingw32/sys-root/mingw/include/stdio.h:384:7: note: previous 
definition of 'vfscanf' was here
make[3]: *** [stdio-read.lo] Error 1
make[3]: Leaving directory `/home/berrange/src/virt/libvirt/build/gnulib/lib'





While on x86_64-w64-mingw32 only I see:


In file included from ../../../gnulib/lib/regex.c:69:0:
../../../gnulib/lib/regcomp.c: In function 'parse_dup_op':
../../../gnulib/lib/regcomp.c:2624:39: warning: cast to pointer from integer of 
different size [-Wint-to-pointer-cast]
../../../gnulib/lib/regcomp.c: In function 'mark_opt_subexp':
../../../gnulib/lib/regcomp.c:3859:19: warning: cast from pointer to integer of 
different size [-Wpointer-to-int-cast]


Regards,
Daniel
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