New to hiredis

[angjunkang]

Hi I'm new to hiredis or in general key value database, and I am quite lost now. Sorry for asking but after downloading the source code. Do I have to do anything before I compile? I tried to compile and run with some of the examples here: https://redislabs.com/lp/hiredis/. However it seems like there is an error saying some methods example sdsempty() in the hiredis.c file is not defined. Am I missing a step of making files or installing the hiredis library? I am very clueless right now and will appreciate any help I can get. Thanks in advance.