qtbase build failed for b2qt developer build(warnings being treated as errors)

/opt/yocto-armv7/sysroots/x86_64-pokysdk-linux/usr/bin/arm-poky-linux-gnueabi/arm-poky-linux-gnueabi-g++ -c -include .pch/Qt5Network -pipe -march=armv7-a -mfpu=neon -DLINUX=1 -mfloat-abi=hard --sysroot=/opt/yocto-armv7/sysroots/armv7ahf-neon-poky-linux-gnueabi -g -std=c++1z -fvisibility=hidden -fvisibility-inlines-hidden -fno-exceptions -Wall -W -Wvla -Wdate-time -Wshift-overflow=2 -Wduplicated-cond -Werror -Wno-error=cpp -Wno-error=deprecated-declarations -Wno-error=strict-overflow -D_REENTRANT -fPIC -DQT_NO_USING_NAMESPACE -DQT_NO_FOREACH -DQT_USE_SYSTEM_PROXIES -DQT_NO_NARROWING_CONVERSIONS_IN_CONNECT -DQT_BUILD_NETWORK_LIB -DQT_BUILDING_QT -DQT_NO_CAST_TO_ASCII -DQT_ASCII_CAST_WARNINGS -DQT_MOC_COMPAT -DQT_USE_QSTRINGBUILDER -DQT_DEPRECATED_WARNINGS -DQT_DISABLE_DEPRECATED_BEFORE=0x050000 -DQT_NO_EXCEPTIONS -D_LARGEFILE64_SOURCE -D_LARGEFILE_SOURCE -DQT_CORE_LIB -I. -Ikernel -I../../include -I../../include/QtNetwork -I../../include/QtNetwork/5.11.0 -I../../include/QtNetwork/5.11.0/QtNetwork -I../../include/QtCore/5.11.0 -I../../include/QtCore/5.11.0/QtCore -I../../include/QtCore -I.moc -I../../mkspecs/devices/linux-imx7-g++ -o .obj/qtcpsocket.o socket/qtcpsocket.cpp
kernel/qnetworkinterface_linux.cpp: In instantiation of ‘void {anonymous}::ProcessNetlinkRequest<Lambda>::operator()(int, nlmsghdr*, char*, size_t, Lambda&&) [with Lambda = getInterfaces(int, char*)::<lambda(ifinfomsg*, size_t)>; size_t = unsigned int]’:
kernel/qnetworkinterface_linux.cpp:216:36:   required from ‘void {anonymous}::processNetlinkRequest(int, nlmsghdr*, char*, size_t, Lambda&&) [with Lambda = getInterfaces(int, char*)::<lambda(ifinfomsg*, size_t)>; size_t = unsigned int]’
kernel/qnetworkinterface_linux.cpp:319:6:   required from here
kernel/qnetworkinterface_linux.cpp:161:48: error: comparison between signed and unsigned integer expressions [-Werror=sign-compare]
         if (send(sock, hdr, hdr->nlmsg_len, 0) != hdr->nlmsg_len)
             ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~
kernel/qnetworkinterface_linux.cpp: In instantiation of ‘void {anonymous}::ProcessNetlinkRequest<Lambda>::operator()(int, nlmsghdr*, char*, size_t, Lambda&&) [with Lambda = getAddresses(int, char*, QList<QNetworkInterfacePrivate*>&)::<lambda(ifaddrmsg*, size_t)>; size_t = unsigned int]’:
kernel/qnetworkinterface_linux.cpp:216:36:   required from ‘void {anonymous}::processNetlinkRequest(int, nlmsghdr*, char*, size_t, Lambda&&) [with Lambda = getAddresses(int, char*, QList<QNetworkInterfacePrivate*>&)::<lambda(ifaddrmsg*, size_t)>; size_t = unsigned int]’
kernel/qnetworkinterface_linux.cpp:423:6:   required from here
kernel/qnetworkinterface_linux.cpp:161:48: error: comparison between signed and unsigned integer expressions [-Werror=sign-compare]
/opt/yocto-armv7/sysroots/x86_64-pokysdk-linux/usr/bin/arm-poky-linux-gnueabi/arm-poky-linux-gnueabi-g++ -c -include .pch/Qt5Network -pipe -march=armv7-a -mfpu=neon -DLINUX=1 -mfloat-abi=hard --sysroot=/opt/yocto-armv7/sysroots/armv7ahf-neon-poky-linux-gnueabi -g -std=c++1z -fvisibility=hidden -fvisibility-inlines-hidden -fno-exceptions -Wall -W -Wvla -Wdate-time -Wshift-overflow=2 -Wduplicated-cond -Werror -Wno-error=cpp -Wno-error=deprecated-declarations -Wno-error=strict-overflow -D_REENTRANT -fPIC -DQT_NO_USING_NAMESPACE -DQT_NO_FOREACH -DQT_USE_SYSTEM_PROXIES -DQT_NO_NARROWING_CONVERSIONS_IN_CONNECT -DQT_BUILD_NETWORK_LIB -DQT_BUILDING_QT -DQT_NO_CAST_TO_ASCII -DQT_ASCII_CAST_WARNINGS -DQT_MOC_COMPAT -DQT_USE_QSTRINGBUILDER -DQT_DEPRECATED_WARNINGS -DQT_DISABLE_DEPRECATED_BEFORE=0x050000 -DQT_NO_EXCEPTIONS -D_LARGEFILE64_SOURCE -D_LARGEFILE_SOURCE -DQT_CORE_LIB -I. -Ikernel -I../../include -I../../include/QtNetwork -I../../include/QtNetwork/5.11.0 -I../../include/QtNetwork/5.11.0/QtNetwork -I../../include/QtCore/5.11.0 -I../../include/QtCore/5.11.0/QtCore -I../../include/QtCore -I.moc -I../../mkspecs/devices/linux-imx7-g++ -o .obj/qudpsocket.o socket/qudpsocket.cpp
/home/qt/work/qt/qtbase/bin/moc -DQT_NO_USING_NAMESPACE -DQT_NO_FOREACH -DQT_USE_SYSTEM_PROXIES -DQT_NO_NARROWING_CONVERSIONS_IN_CONNECT -DQT_BUILD_NETWORK_LIB -DQT_BUILDING_QT -DQT_NO_CAST_TO_ASCII -DQT_ASCII_CAST_WARNINGS -DQT_MOC_COMPAT -DQT_USE_QSTRINGBUILDER -DQT_DEPRECATED_WARNINGS -DQT_DISABLE_DEPRECATED_BEFORE=0x050000 -DQT_NO_EXCEPTIONS -D_LARGEFILE64_SOURCE -D_LARGEFILE_SOURCE -DQT_CORE_LIB --include .moc/moc_predefs.h -I/home/qt/work/qt/qtbase/mkspecs/devices/linux-imx7-g++ -I/home/qt/work/qt/qtbase/src/network -I/home/qt/work/qt/qtbase/src/network/kernel -I/home/qt/work/qt/qtbase/include -I/home/qt/work/qt/qtbase/include/QtNetwork -I/home/qt/work/qt/qtbase/include/QtNetwork/5.11.0 -I/home/qt/work/qt/qtbase/include/QtNetwork/5.11.0/QtNetwork -I/home/qt/work/qt/qtbase/include/QtCore/5.11.0 -I/home/qt/work/qt/qtbase/include/QtCore/5.11.0/QtCore -I/home/qt/work/qt/qtbase/include/QtCore -I/opt/yocto-armv7/sysroots/x86_64-pokysdk-linux/usr/lib/arm-poky-linux-gnueabi/gcc/arm-poky-linux-gnueabi/6.3.0/include -I/opt/yocto-armv7/sysroots/x86_64-pokysdk-linux/usr/lib/arm-poky-linux-gnueabi/gcc/arm-poky-linux-gnueabi/6.3.0/include-fixed socket/qtcpserver.h -o .moc/moc_qtcpserver.cpp
/opt/yocto-armv7/sysroots/x86_64-pokysdk-linux/usr/bin/arm-poky-linux-gnueabi/arm-poky-linux-gnueabi-g++ -c -include .pch/Qt5Network -pipe -march=armv7-a -mfpu=neon -DLINUX=1 -mfloat-abi=hard --sysroot=/opt/yocto-armv7/sysroots/armv7ahf-neon-poky-linux-gnueabi -g -std=c++1z -fvisibility=hidden -fvisibility-inlines-hidden -fno-exceptions -Wall -W -Wvla -Wdate-time -Wshift-overflow=2 -Wduplicated-cond -Werror -Wno-error=cpp -Wno-error=deprecated-declarations -Wno-error=strict-overflow -D_REENTRANT -fPIC -DQT_NO_USING_NAMESPACE -DQT_NO_FOREACH -DQT_USE_SYSTEM_PROXIES -DQT_NO_NARROWING_CONVERSIONS_IN_CONNECT -DQT_BUILD_NETWORK_LIB -DQT_BUILDING_QT -DQT_NO_CAST_TO_ASCII -DQT_ASCII_CAST_WARNINGS -DQT_MOC_COMPAT -DQT_USE_QSTRINGBUILDER -DQT_DEPRECATED_WARNINGS -DQT_DISABLE_DEPRECATED_BEFORE=0x050000 -DQT_NO_EXCEPTIONS -D_LARGEFILE64_SOURCE -D_LARGEFILE_SOURCE -DQT_CORE_LIB -I. -Ikernel -I../../include -I../../include/QtNetwork -I../../include/QtNetwork/5.11.0 -I../../include/QtNetwork/5.11.0/QtNetwork -I../../include/QtCore/5.11.0 -I../../include/QtCore/5.11.0/QtCore -I../../include/QtCore -I.moc -I../../mkspecs/devices/linux-imx7-g++ -o .obj/qsocks5socketengine.o socket/qsocks5socketengine.cpp
cc1plus: all warnings being treated as errors
Makefile:26401: recipe for target '.obj/qnetworkinterface_linux.o' failed
make[2]: *** [.obj/qnetworkinterface_linux.o] Error 1
make[2]: *** Waiting for unfinished jobs....