Fix build errors.

CMakeLists.txt

@@ -24,13 +24,10 @@ FetchContent_Declare(json
   GIT_REPOSITORY https://github.com/ArthurSonzogni/nlohmann_json_cmake_fetchcontent
   GIT_TAG v3.9.1
   GIT_PROGRESS TRUE
+  EXCLUDE_FROM_ALL TRUE
 )
 
-FetchContent_GetProperties(json)
-if(NOT json_POPULATED)
-  FetchContent_Populate(json)
-  add_subdirectory(${json_SOURCE_DIR} ${json_BINARY_DIR} EXCLUDE_FROM_ALL)
-endif()
+FetchContent_MakeAvailable(json)
 
 #-------------------------------------------------------------------------------
 
@@ -41,6 +38,7 @@ FetchContent_Declare(antlr
   GIT_TAG remove-pthread
   GIT_SHALLOW FALSE
   GIT_PROGRESS TRUE
+  EXCLUDE_FROM_ALL TRUE
 )
 
 FetchContent_GetProperties(antlr)

src/translator/grammar/CMakeLists.txt

@@ -10,9 +10,8 @@ else()
   FetchContent_Declare(kgt
     GIT_REPOSITORY https://github.com/ArthurSonzogni/kgt
     GIT_TAG 56c3f46cf286051096d9295118c048219fe0d776
+    EXCLUDE_FROM_ALL
     )
-  FetchContent_GetProperties(kgt)
-  FetchContent_Populate(kgt)
-  add_subdirectory(${kgt_SOURCE_DIR} ${kgt_BINARY_DIR} EXCLUDE_FROM_ALL)
+  FetchContent_MakeAvailable(kgt)
   target_link_libraries(translator_grammar PRIVATE kgt::kgt)
 endif()

src/translator/graph_planar/GraphPlanarEmpty.cpp

@@ -1,3 +1,4 @@
+#include <memory>
 #include "translator/Translator.h"
 
 std::unique_ptr<Translator> GraphPlanarTranslator() {