[libvirt] libvirt and mingw64 x64, bad idea?

Hi, I tried to update the fedora mingw package to follow the mingw64 packaging guideline and allow build for x86 and x64. But I got into build warning and errors for x86_64. (using Fedora Cross project repo: http://build1.openftd.org/fedora-cross/fedora-cross.repo, x86_64-w64-mingw32-gcc (GCC) 4.6.2 20110908 and later) ./configure --host=x86_64-w64-mingw32 --build=x86_64-unknown-linux-gnu --target=x86_64-w64-mingw32 --prefix=/usr/x86_64-w64-mingw32/sys-root/mingw --exec-prefix=/usr/x86_64-w64-mingw32/sys-root/mingw --bindir=/usr/x86_64-w64-mingw32/sys-root/mingw/bin --sbindir=/usr/x86_64-w64-mingw32/sys-root/mingw/sbin --sysconfdir=/usr/x86_64-w64-mingw32/sys-root/mingw/etc --datadir=/usr/x86_64-w64-mingw32/sys-root/mingw/share --includedir=/usr/x86_64-w64-mingw32/sys-root/mingw/include --libdir=/usr/x86_64-w64-mingw32/sys-root/mingw/lib --libexecdir=/usr/x86_64-w64-mingw32/sys-root/mingw/libexec --localstatedir=/usr/x86_64-w64-mingw32/sys-root/mingw/var --sharedstatedir=/usr/x86_64-w64-mingw32/sys-root/mingw/com --mandir=/usr/x86_64-w64-mingw32/sys-root/mingw/share/man --infodir=/usr/x86_64-w64-mingw32/sys-root/mingw/share/info --without-xen --without-qemu --without-openvz --without-lxc --without-vbox --without-xenapi --without-sasl --without-avahi --without-polkit --without-python --without-libvirtd --without-uml --without-phyp --without-hyperv --without-vmware --without-netcf --without-audit --without-dtrace --enable-static The somewhat worrying error is: util/command.c:54:1: error: static assertion failed: "verify (sizeof(pid_t) <= sizeof(int))" /* We have quite a bit of changes to make if this doesn't hold. */ verify(sizeof(pid_t) <= sizeof(int)); There are a few other warnings, see attached files. Is this going to be something difficult and worth to fix? regards -- Marc-André Lureau