Statically build and link the ANTLR4 runtime.

Signed-off-by: Dusty DeWeese <[email protected]>

src/CMakeLists.txt

@@ -15,6 +15,15 @@ list(APPEND CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/../third_party/antlr4/
 
 set(CMAKE_CXX_STANDARD 11)
 
+# required if linking to static library
+add_definitions(-DANTLR4CPP_STATIC)
+
+# add external build for antlrcpp
+include(ExternalAntlr4Cpp)
+
+# https://github.com/antlr/antlr4/issues/2776#issuecomment-677438028
+set_property(TARGET antlr4_static PROPERTY POSITION_INDEPENDENT_CODE ON)
+
 # add antrl4cpp artifacts to project environment
 include_directories(${ANTLR4_INCLUDE_DIRS})
 
@@ -25,7 +34,7 @@ set(ANTLR_EXECUTABLE ${CMAKE_CURRENT_SOURCE_DIR}/../third_party/antlr4/antlr-4.9
 # add macros to generate ANTLR Cpp code from grammar
 find_package(ANTLR REQUIRED)
 
-find_library(ANTLR4_RUNTIME NAMES antlr4-runtime REQUIRED)
+set(ANTLR4_RUNTIME antlr4_static)
 
 # Unit testing library
 add_subdirectory(${CMAKE_CURRENT_SOURCE_DIR}/../third_party/googletest EXCLUDE_FROM_ALL googletest)
@@ -69,6 +78,7 @@ add_library(parse_fasm SHARED ParseFasm.cpp
   ${ANTLR_FasmParser_CXX_OUTPUTS})
 target_link_libraries(parse_fasm ${ANTLR4_RUNTIME})
 target_compile_options(parse_fasm PRIVATE -Wno-attributes) # Disable warning from antlr4-runtime
+set_property(TARGET parse_fasm PROPERTY POSITION_INDEPENDENT_CODE ON)
 
 add_executable(parse_fasm_tests
   ParseFasmTests.cpp