fix for building with no internet connection

Author: Man2Dev

examples/eval-callback/CMakeLists.txt

@@ -4,7 +4,25 @@ install(TARGETS ${TARGET} RUNTIME)
 target_link_libraries(${TARGET} PRIVATE common llama ${CMAKE_THREAD_LIBS_INIT})
 target_compile_features(${TARGET} PRIVATE cxx_std_17)
 
-set(TEST_TARGET test-eval-callback)
-add_test(NAME ${TEST_TARGET}
-        COMMAND llama-eval-callback --hf-repo ggml-org/models --hf-file tinyllamas/stories260K.gguf --model stories260K.gguf --prompt hello --seed 42 -ngl 0)
-set_property(TEST ${TEST_TARGET} PROPERTY LABELS eval-callback curl)
+if(MSVC)
+       execute_process(
+           COMMAND ping www.google.com -n 2
+           ERROR_QUIET
+           RESULT_VARIABLE NO_CONNECTION
+    )
+else()
+       execute_process(
+           COMMAND ping www.google.com -c 2
+           ERROR_QUIET
+           RESULT_VARIABLE NO_CONNECTION
+    )
+endif()
+
+if(NOT NO_CONNECTION EQUAL 0)
+       message(WARNING "Offline mode!")
+else()
+       set(TEST_TARGET test-eval-callback)
+       add_test(NAME ${TEST_TARGET}
+               COMMAND llama-eval-callback --hf-repo ggml-org/models --hf-file tinyllamas/stories260K.gguf --model stories260K.gguf --prompt hello --seed 42 -ngl 0)
+       set_property(TEST ${TEST_TARGET} PROPERTY LABELS eval-callback curl)
+endif()