after referring to this file i made changes and gave the locations required following this post
i ended up onto another error
make -C post_processor
make[1]: Entering directory ‘/home/vaaan/Downloads/deepstream_tao_apps/post_processor’
g++ -o libnvds_infercustomparser_tao.so nvdsinfer_custombboxparser_tao.cpp -I/opt/nvidia/deepstream/deepstream-5.1/sources/includes -I/usr/local/cuda-11.1/include -I/home/vaaan/TensorRT-7.2.1.6/include -Wall -std=c++11 -shared -fPIC -Wl,–start-group -lnvinfer -lnvparsers -L/usr/local/cuda-11.1/lib64 -lcudart -lcublas -L/home/vaaan/TensorRT-7.2.1.6/lib -Wl,–end-group
/bin/sh: 1: cannot open b: No such file
Makefile:51: recipe for target ‘libnvds_infercustomparser_tao.so’ failed
make[1]: *** [libnvds_infercustomparser_tao.so] Error 2
make[1]: Leaving directory ‘/home/vaaan/Downloads/deepstream_tao_apps/post_processor’
Makefile:24: recipe for target ‘all’ failed
make: *** [all] Error 2
I even tried this with older version deepstream_tlt_apps,
i landed onto the same error