cmake support for json-c

CMakeLists.txt

@@ -28,6 +28,7 @@ target_link_libraries(vesuvius_tests_sanitizer PUBLIC -lm)
 
 find_package(Blosc2 REQUIRED)
 find_package(CURL REQUIRED)
+find_package(JsonC REQUIRED)
 
 if(Blosc2_FOUND)
     target_link_libraries(vesuvius_example PUBLIC Blosc2::Blosc2)
@@ -47,5 +48,14 @@ else()
     message(FATAL_ERROR "CURL not found, please install curl")
 endif()
 
+if(JsonC_FOUND)
+    target_link_libraries(vesuvius_example PUBLIC JsonC::JsonC)
+    target_link_libraries(vesuvius_example2 PUBLIC JsonC::JsonC)
+    target_link_libraries(vesuvius_tests PUBLIC JsonC::JsonC)
+    target_link_libraries(vesuvius_tests_sanitizer PUBLIC JsonC::JsonC)
+else()
+    message(FATAL_ERROR "json-c not found, please install json-c: https://github.com/json-c/json-c")
+endif()
+
 target_compile_options(vesuvius_tests_sanitizer PUBLIC -fsanitize=address -fno-omit-frame-pointer)
 target_link_options(vesuvius_tests_sanitizer PUBLIC -fsanitize=address)

cmake/FindJsonC.cmake

@@ -0,0 +1,33 @@
+# FindJsonC.cmake
+# Defines:
+#  JSONC_FOUND        - System has json-c
+#  JSONC_INCLUDE_DIRS - json-c include directories
+#  JSONC_LIBRARY      - json-c library
+#  JsonC::JsonC       - Imported target
+
+find_path(JSONC_INCLUDE_DIRS
+        NAMES json-c/json.h
+        PATHS ${JSONC_ROOT_DIR}
+        PATH_SUFFIXES include
+)
+
+find_library(JSONC_LIBRARY
+        NAMES json-c
+        PATHS ${JSONC_ROOT_DIR}
+        PATH_SUFFIXES lib lib64
+)
+
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(JsonC
+        REQUIRED_VARS JSONC_LIBRARY JSONC_INCLUDE_DIRS
+)
+
+if(JsonC_FOUND AND NOT TARGET JsonC::JsonC)
+    add_library(JsonC::JsonC UNKNOWN IMPORTED)
+    set_target_properties(JsonC::JsonC PROPERTIES
+            IMPORTED_LOCATION "${JSONC_LIBRARY}"
+            INTERFACE_INCLUDE_DIRECTORIES "${JSONC_INCLUDE_DIRS}"
+    )
+endif()
+
+mark_as_advanced(JSONC_INCLUDE_DIRS JSONC_LIBRARY)