eliminate cJSON submodule

.gitmodules

@@ -1,6 +1,3 @@
-[submodule "cJSON"]
-	path = cJSON
-	url = https://github.com/ennorehling/cJSON.git
 [submodule "storage"]
 	path = storage
 	url = https://github.com/ennorehling/storage.git

CMakeLists.txt

@@ -41,6 +41,7 @@ endif (NOT CURSES_FOUND)
 
 find_package (SQLite3 REQUIRED)
 find_package (IniParser REQUIRED)
+find_package (CJSON REQUIRED)
 find_package (EXPAT REQUIRED)
 find_package (ToLua REQUIRED)
 if (TOLUA_FOUND)
@@ -53,7 +54,6 @@ endif(TOLUA_FOUND)
 
 enable_testing()
 
-add_subdirectory (cJSON)
 add_subdirectory (storage)
 add_subdirectory (clibs)
 add_subdirectory (process)

cJSON

@@ -1 +0,0 @@
-Subproject commit 460207f9c09d501a2e302e5313b2f67dca0d6d63

cmake/Modules/FindCJSON.cmake

@@ -0,0 +1,59 @@
+# Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
+# file Copyright.txt or https://cmake.org/licensing for details.
+
+#[=======================================================================[.rst:
+FindCJSON
+-----------
+
+.. versionadded:: 3.20
+
+Find the cJSON libraries, v3
+
+IMPORTED targets
+^^^^^^^^^^^^^^^^
+
+This module defines the following :prop_tgt:`IMPORTED` target:
+
+``DaveGamble::CJSON``
+
+Result variables
+^^^^^^^^^^^^^^^^
+
+This module will set the following variables if found:
+
+``CJSON_INCLUDE_DIRS``
+  where to find sqlite3.h, etc.
+``CJSON_LIBRARIES``
+  the libraries to link against to use CJSON.
+``CJSON_VERSION``
+  version of the CJSON library found
+``CJSON_FOUND``
+  TRUE if found
+
+#]=======================================================================]
+
+# Look for the necessary header
+find_path(CJSON_INCLUDE_DIR cJSON.h PATH_SUFFIXES cjson)
+mark_as_advanced(CJSON_INCLUDE_DIR)
+
+# Look for the necessary library
+find_library(CJSON_LIBRARY cjson)
+mark_as_advanced(CJSON_LIBRARY)
+
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(CJSON
+    REQUIRED_VARS CJSON_INCLUDE_DIR CJSON_LIBRARY
+    VERSION_VAR CJSON_VERSION)
+
+# Create the imported target
+if(CJSON_FOUND)
+    set(CJSON_INCLUDE_DIRS ${CJSON_INCLUDE_DIR})
+    set(CJSON_LIBRARIES ${CJSON_LIBRARY})
+    if(NOT TARGET DaveGamble::CJSON)
+        add_library(DaveGamble::CJSON UNKNOWN IMPORTED)
+        set_target_properties(DaveGamble::CJSON PROPERTIES
+            IMPORTED_LOCATION             "${CJSON_LIBRARY}"
+            INTERFACE_INCLUDE_DIRECTORIES "${CJSON_INCLUDE_DIR}")
+    endif()
+endif()
+

src/CMakeLists.txt

@@ -1,7 +1,6 @@
 project (server C)
 
 include_directories (${CMAKE_CURRENT_SOURCE_DIR})
-include_directories (${CJSON_INCLUDE_DIR})
 include_directories (${CRYPTO_INCLUDE_DIR})
 include_directories (${CLIBS_INCLUDE_DIR})
 include_directories (${STORAGE_INCLUDE_DIR})
@@ -209,7 +208,7 @@ target_link_libraries(eressea
   ${LUA_LIBRARIES}
   ${STORAGE_LIBRARIES}
   ${CJSON_LIBRARIES}
-  ${INIPARSER_LIBRARIES}
+  ${IniParser_LIBRARIES}
 )
 
 set(TESTS_SRC
@@ -268,7 +267,7 @@ target_link_libraries(test_eressea
   ${CLIBS_LIBRARIES}
   ${STORAGE_LIBRARIES}
   ${CJSON_LIBRARIES}
-  ${INIPARSER_LIBRARIES}
+  ${IniParser_LIBRARIES}
   )
 
 add_test(server test_eressea)
@@ -301,11 +300,8 @@ if (HAVE_LIBBSD)
 target_link_libraries(parser bsd)
 endif (HAVE_LIBBSD)
 
-if (IniParser_FOUND)
-target_include_directories(game PUBLIC ${IniParser_INCLUDE_DIRS})
-target_link_libraries(eressea ${IniParser_LIBRARIES})
-target_link_libraries(test_eressea ${IniParser_LIBRARIES})
-endif (IniParser_FOUND)
+target_include_directories (game PUBLIC ${CJSON_INCLUDE_DIRS})
+target_include_directories (game PUBLIC ${IniParser_INCLUDE_DIRS})
 
 if (SQLite3_FOUND)
 target_include_directories (game PRIVATE ${SQLite3_INCLUDE_DIRS})

src/json.c

@@ -9,7 +9,8 @@
 #include <kernel/faction.h>
 #include <kernel/terrain.h>
 #include <stream.h>
-#include "cJSON.h"
+
+#include <cJSON.h>
 
 #include <string.h>
 #include <stdlib.h>

src/util/crypto/CMakeLists.txt

@@ -13,7 +13,7 @@ SET (LIB_SRC
 )
 ADD_LIBRARY (crypto ${LIB_SRC})
 
-set (CRYPTO_INCLUDE_DIR ${CMAKE_CURRENT_SOURCE_DIR} CACHE INTERNAL "cJSON headers")
+set (CRYPTO_INCLUDE_DIR ${CMAKE_CURRENT_SOURCE_DIR} CACHE INTERNAL "crypto headers")
 set (CRYPTO_LIBRARIES crypto CACHE INTERNAL "crypto libraries")
 
 IF(WIN32)