fix paths to weights in build_lib.sh for VivadoAccelator backend (#1198)

Author: JanFSchulte

hls4ml/templates/vivado_accelerator/build_lib.sh

@@ -9,9 +9,11 @@ fi
 INCFLAGS="-Ifirmware/ap_types/"
 PROJECT=myproject
 LIB_STAMP=mystamp
+BASEDIR="$(cd "$(dirname "$0")" && pwd)"
+WEIGHTS_DIR="\"${BASEDIR}/firmware/weights\""
 
-${CC} ${CFLAGS} ${INCFLAGS} -c firmware/${PROJECT}.cpp -o ${PROJECT}.o
-${CC} ${CFLAGS} ${INCFLAGS} -c firmware/${PROJECT}_axi.cpp -o ${PROJECT}_axi.o
-${CC} ${CFLAGS} ${INCFLAGS} -c ${PROJECT}_bridge.cpp -o ${PROJECT}_bridge.o
+${CC} ${CFLAGS} ${INCFLAGS} -D WEIGHTS_DIR="${WEIGHTS_DIR}" -c firmware/${PROJECT}.cpp -o ${PROJECT}.o
+${CC} ${CFLAGS} ${INCFLAGS} -D WEIGHTS_DIR="${WEIGHTS_DIR}" -c firmware/${PROJECT}_axi.cpp -o ${PROJECT}_axi.o
+${CC} ${CFLAGS} ${INCFLAGS} -D WEIGHTS_DIR="${WEIGHTS_DIR}" -c ${PROJECT}_bridge.cpp -o ${PROJECT}_bridge.o
 ${CC} ${CFLAGS} ${INCFLAGS} -shared ${PROJECT}.o ${PROJECT}_axi.o ${PROJECT}_bridge.o -o firmware/${PROJECT}-${LIB_STAMP}.so
 rm -f *.o