[Lognorm] json.h: No such file or directory

[Champ Clark III]

Hello all.....

I brought this issue up some time ago and thought I would bring it up
again. 

In the liblognorm.h,  the json.h is hard coded as "#include <json.h>".  
In some Linux distributions,  the json-c headers ends up in #include
<json/json.h>. 

This issue comes up when attempting to link applications with
liblognorm.  For example,  I have pulled and installed libestr and
liblognorm from Github a few minutes
ago.   This is a brand new Ubuntu 12.04 box.  

When I go to compile Sagan with liblognorm support (which is default), 
I get the following error:

--<snip>--

In file included from sagan-config.c:49:0:
/usr/local/include/liblognorm.h:64:18: fatal error: json.h: No such file
or directory
compilation terminated.
make[2]: *** [sagan-config.o] Error 1

--<snip>--

In order to fix this issue,  I have to manually edit the
/usr/local/include/liblognorm.h file and change:

#include <json.h>

to

# include <json/json.h>

I had a similar problem with Sagan and addressed it this way.  In my
configure.ac i have the following:

--<snip>--

#if defined(HAVE_JSON_JSON_H)
#  include <json/json.h>
#else
#  include <json.h>
#endif

--<snip>--

Right now,  when this issue comes up,  I have to tell people to manually
edit the liblognorm.h file and manually change the json.h locations . 
I've experienced this
problem with Ubuntu and Gentoo. The issue has been reported on Fedora
Core 19.


https://groups.google.com/forum/#!msg/sagan-users/o9vBF2CAq_g/9ZWIiejoFwcJ

Let me know your thoughts and thank you! 


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