diff -up gdl-1.0.0/src/CMakeLists.txt.antlr gdl-1.0.0/src/CMakeLists.txt
--- gdl-1.0.0/src/CMakeLists.txt.antlr	2021-08-19 20:04:43.096095029 -0600
+++ gdl-1.0.0/src/CMakeLists.txt	2021-08-19 20:05:26.844467193 -0600
@@ -193,9 +193,7 @@ ${WX_RC}
 )
 endif(HAVE_LIBWXWIDGETS AND WIN32)
 
-add_subdirectory(antlr)
-
-include_directories(${CMAKE_SOURCE_DIR} ${CMAKE_SOURCE_DIR}/src ${CMAKE_SOURCE_DIR}/src/antlr ${CMAKE_BINARY_DIR})
+include_directories(${CMAKE_SOURCE_DIR} ${CMAKE_SOURCE_DIR}/src ${CMAKE_BINARY_DIR})
 link_directories(${LINK_DIRECTORIES})
 
 if(PYTHON_MODULE) #GDL.so
@@ -213,7 +211,6 @@ if(USE_OPENMP)
 	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${OpenMP_CXX_FLAGS}")
 endif(USE_OPENMP)
 
-add_dependencies(gdl antlr) # be sure that antlr is built before gdl
 target_link_libraries(gdl antlr) # link antlr against gdl
 if (MINGW)
 target_link_libraries(gdl ws2_32)