diff --git a/toolchain/ECMAndroidDeployQt.cmake b/toolchain/ECMAndroidDeployQt.cmake
--- a/toolchain/ECMAndroidDeployQt.cmake
+++ b/toolchain/ECMAndroidDeployQt.cmake
@@ -38,10 +38,8 @@
 
     function(havestl var access VALUE)
         if (NOT VALUE STREQUAL "")
-            string(FIND "${VALUE}" ".so\"" OUT)
-            math(EXPR OUT "${OUT}+4")
-            string(SUBSTRING "${VALUE}" 0 ${OUT} OUTSTR)
-            file(WRITE ${CMAKE_BINARY_DIR}/stl "${OUTSTR}")
+            string (REGEX MATCH "\".+shared\.so\"" OUT ${VALUE})
+            file(WRITE ${CMAKE_BINARY_DIR}/stl "${OUT}")
         endif()
     endfunction()
     function(haveranlib var access VALUE)
diff --git a/toolchain/specifydependencies.cmake b/toolchain/specifydependencies.cmake
--- a/toolchain/specifydependencies.cmake
+++ b/toolchain/specifydependencies.cmake
@@ -21,10 +21,27 @@
     endif()
 endforeach()
 
+function(duplicate libpath)
+    get_filename_component (name ${libpath} NAME)
+    foreach (extralib ${extralibs})
+        get_filename_component (extralibname ${extralib} NAME)
+        if (${extralibname} STREQUAL ${name})
+            set (IS_EQUAL TRUE PARENT_SCOPE)
+            break()
+        endif()
+    endforeach()
+endfunction()
+
 if (ANDROID_EXTRA_LIBS)
     foreach (extralib ${ANDROID_EXTRA_LIBS})
-        message(STATUS "manually specified extra library: " ${extralib})
-        list(APPEND extralibs ${extralib})
+        duplicate(${extralib})
+        if (IS_EQUAL)
+            message (STATUS "found duplicate, skipping: " ${extralib})
+            set (IS_EQUAL FALSE)
+        else()
+            message(STATUS "manually specified extra library: " ${extralib})
+            list(APPEND extralibs ${extralib})
+        endif()
     endforeach()
 endif()