Strange - have you done a 'make clean' before make ?
its a fresh pull
git clone http:///..
cd QMC
./autogen.sh
LDFLAGS="-L/home/buzz/DB48/lib/" CPPFLAGS="-I/home/buzz/DB48/include/" ./configure --disable-tests
make
boom error , on exact same platform previous worked fine , i noticed diff was 99% formatting mods, what gives?