make install: json.hpp: No such file or directory

[pdurbin]

I'm on commit 7c43093 on CentOS 7 in Vagrant (here's my Vagrantfile) and when I run sudo make install as explained in the README, it fails with fatal error: json.hpp: No such file or directory as shown below. Did I miss a step? A dependency?

[vagrant@standalone prov-cpl]$ cat /etc/redhat-release 
CentOS Linux release 7.2.1511 (Core) 
[vagrant@standalone prov-cpl]$ sudo make install
  CXX     cpl-standalone/build/release/cpl-standalone.o
In file included from cpl-private.h:38:0,
                 from cpl-standalone.cpp:36:
cpl-standalone/../include/cplxx.h:50:20: fatal error: json.hpp: No such file or directory
 #include <json.hpp>
                    ^
compilation terminated.
make[3]: *** [build/release/cpl-standalone.o] Error 1
make[2]: *** [build/release/cpl-standalone.o] Error 2
make[1]: *** [release] Error 2
make: *** [install] Error 1
[vagrant@standalone prov-cpl]$ 

I suspect the project might be using https://github.com/nlohmann/json because I'm seeing some references to it. For example, nlohmann_json is mentioned under "Please make sure that the following packages are installed" at

prov-cpl/INSTALL.Linux

Lines 16 to 23 in 7c43093

	Please make sure that the following packages are installed:
	unixodbc
	unixodbc-dev
	odbcinst
	odbc-postgresql (for PostgreSQL)
	nlohmann_json
	boost

but I'm not sure how to install it. Can the docs be clarified, please? Thanks.

[pdurbin]

I tried downloading json.hpp and moving it into the include directory like this:

wget https://github.com/nlohmann/json/releases/download/v3.0.1/json.hpp
mv json.hpp include

But now it's saying my compiler is too old:

[vagrant@standalone prov-cpl]$ sudo make install
  CXX     cpl-standalone/build/release/cpl-standalone.o
In file included from ../include/cplxx.h:50:0,
                 from cpl-private.h:38,
                 from cpl-standalone.cpp:36:
cpl-standalone/../include/json.hpp:67:10: error: #error "unsupported GCC version - see https://github.com/nlohmann/json#supported-compilers"
         #error "unsupported GCC version - see https://github.com/nlohmann/json#supported-compilers"
          ^
In file included from cpl-private.h:38:0,
                 from cpl-standalone.cpp:36:
cpl-standalone/../include/cplxx.h:51:42: fatal error: boost/graph/adjacency_list.hpp: No such file or directory
 #include <boost/graph/adjacency_list.hpp>
                                          ^
compilation terminated.
make[3]: *** [build/release/cpl-standalone.o] Error 1
make[2]: *** [build/release/cpl-standalone.o] Error 2
make[1]: *** [release] Error 2
make: *** [install] Error 1
[vagrant@standalone prov-cpl]$ gcc --version
gcc (GCC) 4.8.5 20150623 (Red Hat 4.8.5-16)
Copyright (C) 2015 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

[vagrant@standalone prov-cpl]$ which gcc
/usr/bin/gcc
[vagrant@standalone prov-cpl]$ rpm -qf /usr/bin/gcc
gcc-4.8.5-16.el7_4.1.x86_64
[vagrant@standalone prov-cpl]$ 

According to https://github.com/nlohmann/json#supported-compilers (from above) "GCC 4.9 - 7.2 (and possibly later)" is supported by I have GCC 4.8.5 on CentOS 7 according to the output above.