gui/libwallet_merged: libunbound is one more dependency

src/wallet/CMakeLists.txt

@@ -74,14 +74,18 @@ target_link_libraries(wallet
     ${Boost_REGEX_LIBRARY}
     ${EXTRA_LIBRARIES})
 
-set(libs_to_merge wallet cryptonote_core mnemonics common crypto ringct)
 
-foreach(lib ${libs_to_merge})
-    list(APPEND objlibs $<TARGET_OBJECTS:obj_${lib}>) # matches naming convention in src/CMakeLists.txtA
-endforeach()
-add_library(wallet_merged STATIC ${objlibs})
-install(TARGETS wallet_merged
-    ARCHIVE DESTINATION lib)
+# build and install libwallet_merged only if we building for GUI
+if (BUILD_GUI_DEPS)
+    set(libs_to_merge wallet cryptonote_core mnemonics common crypto ringct)
 
-install(FILES ${wallet_api_headers}
-    DESTINATION include/wallet)
+    foreach(lib ${libs_to_merge})
+        list(APPEND objlibs $<TARGET_OBJECTS:obj_${lib}>) # matches naming convention in src/CMakeLists.txt
+    endforeach()
+    add_library(wallet_merged STATIC ${objlibs})
+    install(TARGETS wallet_merged
+        ARCHIVE DESTINATION lib)
+
+    install(FILES ${wallet_api_headers}
+        DESTINATION include/wallet)
+endif()