issue with adding library about click

[tbarbette]

What do you mean by everything is fine when you use the library in elements? Click fully compiles? In which case do you get the undefined symbol then?

[tbarbette]

You can use make V=1 to verify the library is indeed linked in libclick.a

[ali64mohammad]

if I use my library in for example classifier element that is in the click project, I can call my library function and it works.
and click fully compiles without error.
But if I use my library in my element that is a package and I wrote it, both click and element will be compiled, but when I run a .click file with my element, the error shows up.
and if I remove my library from my element, it runs and does its job without any error.
I check libclick.a file and .o file of my library exists in it.
and header files exists in /usr/local/click/include

where should I use make V=1 in element or in click?
my general question is how to add a library to click like glue library. that every element can include it ,like this:

include <click/test_library>