fatal error: cjson/cJSON.h: No such file or directory

[yooo1999]

When build in Linux system I got

fatal error: cjson/cJSON.h: No such file or directory
#  include <cjson/cJSON.h>

sudo apt install libcjson1 libcjson-dev
Fix the problem

maybe add that or validate that using Makefile ?

[B9eirzhiu]

I have the same issue

[ckrey]

To @yooo1999 and @B9eirzhiu the problem can be solved by reading the README or adapting the configuration:

The necessary packages are described inREADME-compiling.md:

* cJSON (optional but recommended, for dynamic-security plugin support, and
  JSON output from mosquitto_sub/mosquitto_rr)
 ...
 To compile, run "make", but also see the file config.mk for more details on the
various options that can be compiled in.

and use of cJSON can be configured in config.mk:

 # Build mosquitto_sub with cJSON support
WITH_CJSON:=yes