find json-c on darwin

Author: qrkourier

library/CMakeLists.txt

@@ -51,7 +51,7 @@ if (TARGET json-c::json-c)
     set(jsonc_libs json-c::json-c)
 else()
     pkg_check_modules(JSONC json-c)
-    if (JSONC_FOUND)
+    if (JSONC_FOUND AND JSONC_INCLUDE_DIRS AND JSONC_LIBRARIES)
         if (NOT TARGET json-c::json-c)
             add_library(json-c::json-c INTERFACE IMPORTED)
             set_target_properties(json-c::json-c PROPERTIES
@@ -62,11 +62,28 @@ else()
         set(jsonc_libs json-c::json-c)
         message("json-c [${JSONC_VERSION}] is ${JSONC_LINK_LIBRARIES}")
     else()
-        find_package(json-c REQUIRED)
-        if (TARGET json-c::json-c)
-            set(jsonc_libs json-c::json-c)
+        # Try Homebrew default path on macOS
+        if(APPLE)
+            find_path(JSONC_INCLUDE_DIRS json-c/json.h PATHS /opt/homebrew/include /usr/local/include)
+            find_library(JSONC_LIBRARIES json-c PATHS /opt/homebrew/lib /usr/local/lib)
+            if(JSONC_INCLUDE_DIRS AND JSONC_LIBRARIES)
+                add_library(json-c::json-c INTERFACE IMPORTED)
+                set_target_properties(json-c::json-c PROPERTIES
+                    INTERFACE_INCLUDE_DIRECTORIES "${JSONC_INCLUDE_DIRS}"
+                    INTERFACE_LINK_LIBRARIES "${JSONC_LIBRARIES}"
+                )
+                set(jsonc_libs json-c::json-c)
+                message("json-c (manual Homebrew) is ${JSONC_LIBRARIES}")
+            else()
+                message(FATAL_ERROR "Could not find required library [json-c] (tried pkg-config and Homebrew paths)")
+            endif()
         else()
-            message(FATAL_ERROR "Could not find required library [json-c]")
+            find_package(json-c REQUIRED)
+            if (TARGET json-c::json-c)
+                set(jsonc_libs json-c::json-c)
+            else()
+                message(FATAL_ERROR "Could not find required library [json-c]")
+            endif()
         endif()
     endif()
 endif()