Check for system version of simpleini. (#4751)

CMake/Dependencies.cmake

@@ -167,7 +167,23 @@ if(WIN32 AND NOT UWP_LIB)
   add_subdirectory(3rdParty/find_steam_game)
 endif()
 
-add_subdirectory(3rdParty/simpleini)
+if(NOT DEFINED DEVILUTIONX_SYSTEM_SIMPLEINI)
+  find_package(simpleini QUIET)
+  if(simpleini_FOUND)
+    message("-- Found simpleini")
+  else()
+    message("-- Suitable system simpleini package not found, will use simpleini from source")
+    set(DEVILUTIONX_SYSTEM_SIMPLEINI OFF)
+  endif()
+endif()
+dependency_options("simpleini" DEVILUTIONX_SYSTEM_SIMPLEINI ON DEVILUTIONX_STATIC_SIMPLEINI)
+if(DEVILUTIONX_SYSTEM_SIMPLEINI)
+  if(NOT simpleini_FOUND)
+    find_package(simpleini REQUIRED)
+  endif()
+else()
+  add_subdirectory(3rdParty/simpleini)
+endif()
 
 add_subdirectory(3rdParty/libmpq)
 

CMake/finders/Findsimpleini.cmake

@@ -0,0 +1,21 @@
+find_package(PkgConfig)
+pkg_check_modules(PC_simpleini QUIET simpleini)
+
+find_path(simpleini_INCLUDE_DIR SimpleIni.h
+          HINTS ${PC_simpleini_INCLUDEDIR} ${PC_simpleini_INCLUDE_DIRS})
+
+find_library(simpleini_LIBRARY simpleini
+             HINTS ${PC_simpleini_LIBDIR} ${PC_simpleini_LIBRARY_DIRS})
+
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(simpleini DEFAULT_MSG
+                                  simpleini_INCLUDE_DIR simpleini_LIBRARY)
+
+if(simpleini_FOUND)
+  add_library(simpleini INTERFACE)
+  target_include_directories(simpleini INTERFACE ${simpleini_INCLUDE_DIR})
+  target_link_libraries(simpleini INTERFACE ${simpleini_LIBRARY})
+  mark_as_advanced(simpleini_INCLUDE_DIR simpleini_LIBRARY)
+  set(simpleini_LIBRARIES ${simpleini_LIBRARY})
+  set(simpleini_INCLUDE_DIRS ${simpleini_INCLUDE_DIR})
+endif()

vcpkg.json

@@ -3,7 +3,8 @@
     "version-string": "1.3.0",
     "dependencies": [
         "fmt",
-        "bzip2"
+        "bzip2",
+        "simpleini"
     ],
     "features": {
         "sdl1": {