Compiling Vim with python3 showing E370: Could not load library libpython3.7m.a

I have been trying to compile Vim with python3 on my Mac for many hours, as a result, it looks fine now, as the following:

VIM - Vi IMproved 8.1 (2018 May 18, compiled Dec 9 2018 00:37:54) macOS version Included patches: 1-573 Huge version without GUI.
+python/dyn +python3/dyn

but when I tried to test using :echo(has('python3')), it gives 0.

And command like :python3 print('aha!') gives error:

E370: Could not load library libpython3.7m.a
E263: Sorry, this command is disabled, the Python library could not be loaded.

While python2 works fine. Can anyone help me with mercy?!

Thank you so so much!

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p.s. this is my .configure used:

./configure --with-features=huge 
--enable-multibyte 
--enable-rubyinterp=yes 
--enable-python3interp=yes 
--with-python3-config-dir=/Users/mac/anaconda3/lib/python3.7/config-3.7m-darwin 
--enable-pythoninterp=yes --with-python-config-dir=/usr/local/Cellar/python@2/2.7.15_1/Frameworks/Python.framework/Versions/2.7/lib/python2.7/config 
--enable-luainterp=yes 
--enable-hangulinput=yes 
--enable-cscope 
--prefix=/usr/local/

by the way, --with-python3-config-dir=/usr/local/Cellar/python/3.7.1/Frameworks/Python.framework/Versions/3.7/lib/python3.7/config-3.7m-darwin works the same.

set pythonthreedll=/Applications/Xcode.app/Contents/Developer/Library/Frameworks/Python3.framework/Versions/Current/lib/libpython3.7m.dylib

set pythonthreedll=/location/of/your/python/lib/libpython3.6m.so.1.0