Minor changes.

Author: mgkeka-nbfc

app/Makefile

@@ -3,12 +3,11 @@
 CC=gcc
 LD=gcc 
 CFLAGS=-Wall
-#Add here the <path> of vaccel meson setup --prefix option
-VACCEL_INSTALL_PATH=
+VACCEL_INSTALL_PATH=(pkg-config --variable=prefix vaccel)
 VACCEL_CFLAGS=-I${VACCEL_INSTALL_PATH}/include 
 VACCEL_LDFLAGS=-L${VACCEL_INSTALL_PATH}/lib/x86_64-linux-gnu -lvaccel -ldl
 VADD_LDFLAGS=-L${PWD}/opencl_examples/build/vector_add -lvector_add
-OCL_LDFLAGS=-L/usr/lib/x86_64-linux-gnu/ -lOpenCL
+OCL_LDFLAGS=(pkg-config --libs OpenCL)
 
 
 all: wrapper wrapper-args wrapper-vaccel wrapper-args-vaccel