Guard Linux speech runtime dependency closure and relocatable lookup

tools/speech-runtime/CMakeLists.txt

@@ -33,6 +33,12 @@ else()
     set(GGML_METAL OFF CACHE BOOL "" FORCE)
   endif()
 endif()
+if(UNIX AND NOT APPLE AND NOT SEARCHI_INTERNAL_CPU)
+  # The staged worker and every dynamic backend live together. RUNPATH is
+  # non-transitive, so each shared target needs its own relocatable lookup.
+  set(CMAKE_INSTALL_RPATH "$ORIGIN")
+  set(CMAKE_BUILD_WITH_INSTALL_RPATH ON)
+endif()
 add_subdirectory("${WHISPER_SOURCE}" whisper)
 target_compile_features(whisper PRIVATE cxx_std_17)
 add_executable(searchi-speech-worker worker.cpp)
@@ -44,6 +50,8 @@ endif()
 if(MSVC)
   target_compile_options(searchi-speech-worker PRIVATE /utf-8)
 endif()
-if(UNIX)
+if(APPLE)
   set_target_properties(searchi-speech-worker PROPERTIES BUILD_RPATH "$ORIGIN;@loader_path" INSTALL_RPATH "$ORIGIN;@loader_path")
+elseif(UNIX)
+  set_target_properties(searchi-speech-worker PROPERTIES BUILD_RPATH "$ORIGIN" INSTALL_RPATH "$ORIGIN")
 endif()