Can't use nlohmann on Linux

[TomyFrank]

Can't use nlohmann on Linux

[nlohmann]

Good that you managed it.

[nlohmann]

You need to properly configure the library search path to the json/include folder and then use #include <nlohmann/json.hpp>.

[TomyFrank]

You have said it's a header-only library. so inclduing that would be enough useually but it's not.
How to properly configure the library search path to the json/include?

[nlohmann]

You did not use the single header version which is in the single_include folder. Otherwise, follow https://github.com/nlohmann/json?tab=readme-ov-file#integration.

[TomyFrank]

The single_include folder doesn't exist in the repo folder so I downloaded both json and json_fwd headers in the project directory and changed the code:

#include <iostream>
#include "json.hpp"
#include "json_fwd.hpp"

  int main() {
      auto j = R"(
     {
      "happy": true,
      "pi": 3.141
     }
    )"_json;
    auto data = j.dump();
    std::cout << data << '\n';
    return 0;
}

Error:

 json.hpp:34:10: fatal error: nlohmann/adl_serializer.hpp: No such file or directory
   34 | #include <nlohmann/adl_serializer.hpp>
      |          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
compilation terminated.

[nlohmann]

• You wrote that you cloned the repo, so there should be a single_include folder. Please check.
• If you want to use the files in the include folder, then just including json.hpp or json_fwd.hpp (don't include both, you probably only need json.hpp), then you must set your include path.

[TomyFrank]

Downloaded the ZIP and inslcued json.hpp and it runs. Thanks.
So the easiest way to use nlohmann-json is this way yeah?