Use the correct install prefix for cmake includes.

hzeller · hzeller · commit 9ef1d780af5c · 2025-03-18T22:29:40.000-07:00
diff --git a/runtime/Cpp/runtime/CMakeLists.txt b/runtime/Cpp/runtime/CMakeLists.txt
@@ -7,7 +7,7 @@ if (NOT ANTLR_BUILD_SHARED AND NOT ANTLR_BUILD_STATIC)
   message(FATAL_ERROR "Options ANTLR_BUILD_SHARED and ANTLR_BUILD_STATIC can't both be OFF")
 endif()
 
-set(libantlrcpp_INCLUDE_INSTALL_DIR "include/antlr4-runtime")
+set(libantlrcpp_INCLUDE_INSTALL_DIR "${CMAKE_INSTALL_INCLUDEDIR}/antlr4-runtime")
 
 set(libantlrcpp_INCLUDE_DIRS
   ${PROJECT_SOURCE_DIR}/runtime/src
