need some help in compiling a jsoncpp sample code

Question

I am trying to compile a sample jsoncpp example, but there are tons of compiling errors showing up in \"standard\" headers. did any body see this any time ?

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Answer 1

Check JSON include path. In compilation option use -I/path of JSON include directory, e.g. -I$(pkg-config --cflags jsoncpp).

Answer 2

If you compile with -I.../include/json, then the standard library might accidentally include a JSON header. (In this case, according to asuter, it was features.h.)

The parent directory is a kind of "namespace" for header files. That's why a good practice for any library with headers like incdir/foo/bar.h is -Iincdir and #include <foo/bar.h>.

Answer 3

That's the kind of thing that would happen if one of your headers that preceded it had a syntax error such as a missing ; at end of class declaration. Start by cleaning those.

Answer 4

You need to include header file using this way: #include "json/json.h"

Answer 5

For me it was the features.h included with json-cpp conflicting with the system features.h in some other includes. I renamed it locally to json_features.h in the json-cpp code and all was well.