E:\ros-src\output-MinGW-i386\reactos>ninja bootcd
[2/7] Building CXX object lib/drivers/...iles/libusb.dir/hub_controller.cpp.obj
FAILED: E:\RosBE\i386\bin\g++.exe   -D__REACTOS__ -DDBG=1 -D_SEH_ENABLE_TRACE -D
KDBG=1 -DWINVER=0x502 -D_WIN32_IE=0x600 -D_WIN32_WINDOWS=0x502 -D_SETUPAPI_VER=0
x502 -D_M_IX86 -D_X86_ -D__i386__ -DUSE_COMPILER_EXCEPTIONS -D_USE_32BIT_TIME_T
-D_inline=__inline -D_WIN32_WINNT=0x600 -DUNICODE -D_UNICODE -pipe -fms-extensio
ns -fdebug-prefix-map="E:\ros-src"=ReactOS -gstabs+ -Werror -march=pentium -mtun
e=i686 -Wall -Wno-char-subscripts -Wpointer-arith -Wno-multichar -Wno-unused-val
ue -Wno-error=unused-but-set-variable -Wno-error=maybe-uninitialized -Wno-error=
delete-non-virtual-dtor -Wno-error=narrowing -Os -fno-strict-aliasing -mpreferre
d-stack-boundary=3 -fno-set-stack-executable -fno-optimize-sibling-calls -fno-om
it-frame-pointer -ftracer -g -Ilib/drivers/libusb -I../../lib/drivers/libusb -I.
./../include -I../../include/psdk -I../../include/dxsdk -Iinclude -Iinclude/dxsd
k -Iinclude/psdk -Iinclude/reactos -I../../include/crt -I../../include/ddk -I../
../include/ndk -I../../include/reactos -I../../include/reactos/libs -I../../incl
ude/crt/mingw32    -fno-exceptions -fno-rtti -MMD -MT lib/drivers/libusb/CMakeFi
les/libusb.dir/hub_controller.cpp.obj -MF "lib/drivers/libusb/CMakeFiles/libusb.
dir/hub_controller.cpp.obj.d" -o lib/drivers/libusb/CMakeFiles/libusb.dir/hub_co
ntroller.cpp.obj -c ../../lib/drivers/libusb/hub_controller.cpp
../../lib/drivers/libusb/hub_controller.cpp: In member function 'NTSTATUS CHubCo
ntroller::HandleVendorDevice(PIRP, PURB)':
../../lib/drivers/libusb/hub_controller.cpp:1836:11: error: unused variable 'Tra
nsferBuffer' [-Werror=unused-variable]
cc1plus.exe: all warnings being treated as errors