use find_package

Author: sanathkeshav

CMakeLists.txt

@@ -98,7 +98,7 @@ if (FANS_LIBRARY_FOR_MICRO_MANAGER)
     )
     FetchContent_MakeAvailable(pybind11)
 endif()
-
+find_package(nlohmann_json REQUIRED)
 # ##############################################################################
 # TARGETS
 # ##############################################################################
@@ -141,7 +141,6 @@ target_include_directories(FANS_FANS PUBLIC $<BUILD_INTERFACE:${CMAKE_CURRENT_SO
 # FANS.h header that consuming projects can use
 set_property(TARGET FANS_FANS PROPERTY PUBLIC_HEADER
         include/general.h
-        include/json.hpp
         include/matmodel.h
         include/reader.h
         include/solverCG.h
@@ -200,6 +199,7 @@ target_link_libraries(FANS_FANS PUBLIC ${FFTW3_LIBRARIES})
 target_compile_definitions(FANS_FANS PUBLIC ${FFTW3_DEFINITIONS})
 
 target_link_libraries(FANS_FANS PUBLIC Eigen3::Eigen)
+target_link_libraries(FANS_FANS PUBLIC nlohmann_json::nlohmann_json)
 
 target_link_libraries(FANS_main PRIVATE FANS::FANS)
 

include/general.h

@@ -17,7 +17,7 @@
 using namespace std;
 
 // JSON
-#include <json.hpp>
+#include <nlohmann/json.hpp>
 using nlohmann::json;
 using namespace nlohmann;