Weird mysql error `checking for main() in -llibmysql... no`

Question

I've successfully installed the gem mysql2 with ruby under windows in the past, but now it's showing a weird error

checking for main() in -llibmysql... no

There is no typo, my console really shows -llibmysql and not -libmysql (and I think it should even be just libmysql without any dash)

I have followed all the instructions from this link, and my command looks like

gem install mysql2 -- '--with-mysql-lib="c:\Dev\MySQL_Connector\lib" --with-mysql-include="c:\Dev\MySQL_Connector\include"'
...

ERROR:  Error installing mysql2:
        ERROR: Failed to build gem native extension.

    C:/Bibliotheques/Dev/Ruby200-x64/bin/ruby.exe extconf.rb --with-mysql-lib=c:\Dev\MySQL_Connector\lib --with-mysql-in
clude=c:\Dev\MySQL_Connector\include
checking for ruby/thread.h... yes
checking for rb_thread_call_without_gvl() in ruby/thread.h... yes
checking for rb_thread_blocking_region()... yes
checking for rb_wait_for_single_fd()... yes
checking for rb_hash_dup()... yes
checking for rb_intern3()... yes
-----
Using --with-mysql-dir=c:\Dev\MySQL_Connector
-----
checking for main() in -llibmysql... no

probably you can look around this thread for solutions https://github.com/brianmario/mysql2/issues/364 — Bijendra, Oct 08 '14 at 14:03
Sorry it's been some time and no news from me. I actually switched to the x86 version of ruby, and then did the code modification for the "pow" stuff `https://github.com/mongoid/mongoid/issues/3489` — Cyril Duchon-Doris, Nov 04 '14 at 20:32

Weird mysql error `checking for main() in -llibmysql... no`

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