Build prefixer with -fno-rtti

Signed-off-by: Ted Poole <tpoole@redhat.com>

bssl-compat/prefixer/CMakeLists.txt

@@ -1,10 +1,26 @@
 project(prefixer)
 
-find_package(LLVM REQUIRED CONFIG)
+# https://llvm.org/docs/CMake.html#embedding-llvm-in-your-project
+
 find_package(Clang REQUIRED CONFIG)
+find_package(LLVM REQUIRED CONFIG)
 
-add_executable(prefixer prefixer.cpp)
+message(STATUS "Found LLVM ${LLVM_PACKAGE_VERSION}")
+message(STATUS "LLVM_CMAKE_DIR          = ${LLVM_CMAKE_DIR}")
+message(STATUS "LLVM_INCLUDE_DIRS       = ${LLVM_INCLUDE_DIRS}")
+message(STATUS "LLVM_LIBRARY_DIRS       = ${LLVM_LIBRARY_DIRS}")
+message(STATUS "LLVM_ENABLE_EH          = ${LLVM_ENABLE_EH}")
+message(STATUS "LLVM_ENABLE_RTTI        = ${LLVM_ENABLE_RTTI}")
+message(STATUS "LLVM_DEFINITIONS        = ${LLVM_DEFINITIONS}")
+message(STATUS "LLVM_LINK_LLVM_DYLIB    = ${LLVM_LINK_LLVM_DYLIB}")
 
+
+list(APPEND CMAKE_MODULE_PATH ${LLVM_CMAKE_DIR})
+include(AddLLVM)
+
+
+add_executable(prefixer prefixer.cpp)
+llvm_update_compile_flags(prefixer)
 target_include_directories(prefixer PRIVATE "${LLVM_INCLUDE_DIRS}")
 target_link_directories(prefixer PRIVATE "${LLVM_LIBRARY_DIRS}")
-target_link_libraries(prefixer PRIVATE clang-cpp LLVM)
+target_link_libraries(prefixer PRIVATE clang-cpp)