Using libjson in a C++ project

Question

I'm trying to use libjson within a C++ project and the docs tell me to just "add libjson's source to your project, comment JSON_LIBRARY in the JSONOptions.h file and any C++ compiler should compile it."

Being quite new to C++ and all that, how exactly am I supposed to do that (not using any IDE)? Should I just #include the libjson.h file and that's it? Shouldn't I reference libjson somehow in my call to g++ when compiling my project?

thx in advance

The text about including libjson in your project seems to be if you want to include the actual libjson source files inside your own project. If you just want to use the library then include whatever header files you need, and link with it as a usual library. — Some programmer dude
– Some programmer dude, Commented Aug 7, 2012 at 9:32

adairdavid · Accepted Answer · 2014-02-22 21:37:09Z

3

If you go into the libjson library folder, you will see a makefile. Navigate to that directory in a terminal and type:

make

then

make install

Then, in your code

#include <libjson.h>

or, depending on your include path:

#include <libjson/libjson.h>

That should be all that you need to do.

If you need additional help, you can post in the help forum at sourceforge (I am the author of libjson)

edited Feb 22, 2014 at 21:37

adairdavid

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answered Aug 8, 2012 at 13:17

ninja9578

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Comments

score 2 · Accepted Answer · 2012-08-07 10:26:29Z

2

You have to:

One,

#include <libjson.h>

in order to get access to the functions and data types the library offers, then

Two, link against the libjsonz library:

g++ -o myprogram myprogram.c -ljson

(the -ljson flag has to come last or you'll get a linker error with never versions of GCC.)

EDIT: if you need to build the library, you typically have a configure script or a Makefile. See how to use them.

edited Aug 7, 2012 at 10:26

answered Aug 7, 2012 at 9:37

user529758

2 Comments

DeX3 Over a year ago

ok, but what configuration do I need in order to actually get the library itself? (I'm guessing setting SHARED=1 and building it with the libjson-makefile?)

Owl Over a year ago

How do we get -ljson on debian though? I've tried to install libjson-glib-dev, libjson-c-dev, libjson-c3, libjsoncpp-dev. I can't get -ljson! Where can i get it?

sam · Accepted Answer · 2016-06-22 06:49:29Z

0

if you install json you should find include file at /usr/local/include so

#include <json/json.h>

gcc exasmple.c -ljson

answered Jun 22, 2016 at 6:49

sam

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