commit 1ccbf21a67da0fdbaad881a1f5c2a4df915e8c57
Author: sternenseemann <sternenseemann@systemli.org>
Date:   Tue Oct 5 18:16:10 2021 +0200

    Link against system antlr4 runtime, dynamically
    
    Instead of cloning a antlr4 version from git, use the system one. Also
    don't link it statically, but dynamically by default (the library is
    called antlr4-runtime, not antlr4_static).

diff --git a/CMakeLists.txt b/CMakeLists.txt
index e9c8c08e..dc3a46da 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -36,11 +36,11 @@ list(APPEND CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/cmake)
 # https://www.antlr.org/download/antlr4-cpp-runtime-4.9.3-source.zip
 # set(ANTLR4_ZIP_REPOSITORY "/path_to_antlr4_archive/a4.zip")
 
-add_definitions(-DANTLR4CPP_STATIC)
 set(ANTLR4_WITH_STATIC_CRT OFF)
 # 4.9.3 is the latest ANTLR4 version
 set(ANTLR4_TAG tags/4.9.3)
-include(ExternalAntlr4Cpp)
+find_path(ANTLR4_HEADER antlr4-runtime.h PATH_SUFFIXES antlr4-runtime)
+set(ANTLR4_INCLUDE_DIRS ${ANTLR4_HEADER})
 
 # sanitizer support
 # work around https://github.com/pypa/setuptools/issues/1928 with environment
diff --git a/c/makeotf/lib/hotconv/CMakeLists.txt b/c/makeotf/lib/hotconv/CMakeLists.txt
index 82257bf2..02eb2e30 100644
--- a/c/makeotf/lib/hotconv/CMakeLists.txt
+++ b/c/makeotf/lib/hotconv/CMakeLists.txt
@@ -69,7 +69,7 @@ add_library(hotconv STATIC
 
 set_property(TARGET hotconv PROPERTY C_STANDARD 99)
 target_include_directories(hotconv PRIVATE AFTER $<$<COMPILE_LANGUAGE:CXX>:${ANTLR4_INCLUDE_DIRS}>)
-target_link_libraries(hotconv PUBLIC antlr4_static)
+target_link_libraries(hotconv PUBLIC antlr4-runtime)
 
 if ( CMAKE_COMPILER_IS_GNUCC )
     target_compile_options(hotconv PRIVATE -Wall -Wno-attributes)