I am facing the exact same error as this but for mac os
Error message looks like this:
myfile.cpp:12:10: fatal error: json/json.h: No such file or directory
initially I was trying to run it like this:
g++-11 myfile.cpp -o myfile -ljsoncpp
then I changed it to this:
g++-11 -L/usr/local/opt/jsoncpp myfile.cpp -o myfile -ljsoncpp
and then to this:
g++-11 -I/usr/local/opt/jsoncpp/include -L/usr/local/opt/jsoncpp myfile.cpp -o myfile -ljsoncpp
and then to this:
g++-11 -I./json -L/usr/local/opt/jsoncpp myfile.cpp -o myfile -ljsoncpp
and then to this:
g++-11 -I/path/to/current/dir/json -L/usr/local/opt/jsoncpp pingpong.cpp -o pingpong -ljsoncpp
myfile.cpp was like this intitally:
#include <json/json.h>
...
then influenced by this post I changed it to this:
#include <jsoncpp/json/json.h>
...
but no matter what I do I seem to get the same error
This:
find /usr -name json.h | grep -f json/
Doesnt return anything.
PS: The path of jsoncpp that I used is what I got from this:
brew info jsoncpp
==> jsoncpp: stable 1.9.5, HEAD
Library for interacting with JSON
https://github.com/open-source-parsers/jsoncpp
Not installed
From: https://github.com/Homebrew/homebrew-core/blob/HEAD/Formula/jsoncpp.rb
License: MIT
==> Dependencies
Build: meson ✘, ninja ✘
==> Options
--HEAD
Install HEAD version
==> Analytics
install: 4,398 (30 days), 672 (90 days), 66,483 (365 days)
install-on-request: 2,808 (30 days), 86 (90 days), 3,736 (365 days)
build-error: 0 (30 days)
brew --prefix jsoncpp
/usr/local/opt/jsoncpp
-I/opt/homebrew/include is the include directory for #include <json/json.h>.
-L/opt/homebrew/lib is the library directory for -ljsoncpp.
The include and the library paths are valid for the most of homebrew packages.
/opt/homebrew/opt/jsoncpp is the install directory.
You could install brew install pkg-config. Then the compiler and the linker flags can be retrieved:
$ pkg-config jsoncpp --cflags --libs
-I/opt/homebrew/Cellar/jsoncpp/1.9.5/include -L/opt/homebrew/Cellar/jsoncpp/1.9.5/lib -ljsoncpp
And the build command:
$ g++-11 myfile.cpp -o myfile `pkg-config jsoncpp --cflags --libs`