Separate directories for different build type
./autogen.sh
mkdir build-0 && cd build-0
../configure --without-bdb --prefix=$PWD/install CC=clang CXX=clang++ LDFLAGS=-fuse-ld=lld
mkdir build-1 && cd build-1
../configure --with-gui=qt5 --with-incompatible-bdb --prefix=$PWD/install CC=clang CXX=clang++ LDFLAGS=-fuse-ld=lld