tce-load -i qt-5.x-dev libusb-compat-dev

cd gpsbabel-1.5.3

CXXFLAGS="-fPIC" CC="gcc -flto -fuse-linker-plugin -mtune=generic -Os -pipe" CXX="g++ -flto -fuse-linker-plugin -mtune=generic -Os -pipe -fno-exceptions -fno-rtti -std=gnu++11" ./configure --prefix=/usr/local --localstatedir=/var --with-zlib=system

find . -name Makefile -type f -exec sed -i 's/-g -O2//g' {} \;

make
sudo make install

make linux-gui
Project ERROR: Unknown module(s) in QT: webkit webkitwidgets