MySQL Failed to build gem native extension.

[Michał Rachtan]

I can't install mysql2 on Windows 8.1 64x (I have lates ruby,gems,devkit and mysql).

I tryed everything i found on this topic and nothing worked.

Microsoft Windows [Version 6.3.9600] 

(c) 2013 Microsoft Corporation. Wszelkie prawa zastrzeżone.

C:\Windows\system32>gem install mysql2
Temporarily enhancing PATH to include DevKit...
Building native extensions.  This could take a while...
ERROR:  Error installing mysql2:
        ERROR: Failed to build gem native extension.
    C:/Ruby21-x64/bin/ruby.exe -r ./siteconf20150113-10388-5dntfi.rb extconf.rb
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
checking for mysql_query() in -lmysqlclient... *** extconf.rb failed ***
Could not create Makefile due to some reason, probably lack of necessary
libraries and/or headers.  Check the mkmf.log file for more details.  You may
need configuration options.
Provided configuration options:
        --with-opt-dir
        --without-opt-dir
        --with-opt-include
        --without-opt-include=${opt-dir}/include
        --with-opt-lib
        --without-opt-lib=${opt-dir}/lib
        --with-make-prog
        --without-make-prog
        --srcdir=.
        --curdir
        --ruby=C:/Ruby21-x64/bin/ruby
        --with-mysql-dir
        --without-mysql-dir
        --with-mysql-include
        --without-mysql-include=${mysql-dir}/include
        --with-mysql-lib
        --without-mysql-lib=${mysql-dir}/lib
        --with-mysql-config
        --without-mysql-config
        --with-mysql-dir
        --without-mysql-dir
        --with-mysql-include
        --without-mysql-include=${mysql-dir}/include
        --with-mysql-lib
        --without-mysql-lib=${mysql-dir}/lib
        --with-mysqlclientlib
        --without-mysqlclientlib
C:/Ruby21-x64/lib/ruby/2.1.0/mkmf.rb:395:in `system': Invalid argument - ruby_se
tenv(USER) (Errno::EINVAL)
        from C:/Ruby21-x64/lib/ruby/2.1.0/mkmf.rb:395:in `block in xsystem'
        from C:/Ruby21-x64/lib/ruby/2.1.0/mkmf.rb:321:in `open'
        from C:/Ruby21-x64/lib/ruby/2.1.0/mkmf.rb:385:in `xsystem'
        from C:/Ruby21-x64/lib/ruby/2.1.0/mkmf.rb:463:in `try_do'
        from C:/Ruby21-x64/lib/ruby/2.1.0/mkmf.rb:541:in `try_link0'
        from C:/Ruby21-x64/lib/ruby/2.1.0/mkmf.rb:556:in `try_link'
        from C:/Ruby21-x64/lib/ruby/2.1.0/mkmf.rb:742:in `try_func'
        from C:/Ruby21-x64/lib/ruby/2.1.0/mkmf.rb:999:in `block in find_library'
        from C:/Ruby21-x64/lib/ruby/2.1.0/mkmf.rb:918:in `block in checking_for'
        from C:/Ruby21-x64/lib/ruby/2.1.0/mkmf.rb:351:in `block (2 levels) in po
stpone'
        from C:/Ruby21-x64/lib/ruby/2.1.0/mkmf.rb:321:in `open'
        from C:/Ruby21-x64/lib/ruby/2.1.0/mkmf.rb:351:in `block in postpone'
        from C:/Ruby21-x64/lib/ruby/2.1.0/mkmf.rb:321:in `open'
        from C:/Ruby21-x64/lib/ruby/2.1.0/mkmf.rb:347:in `postpone'
        from C:/Ruby21-x64/lib/ruby/2.1.0/mkmf.rb:917:in `checking_for'
        from C:/Ruby21-x64/lib/ruby/2.1.0/mkmf.rb:995:in `find_library'
        from extconf.rb:70:in `<main>'
extconf failed, exit code 1
Gem files will remain installed in C:/Ruby21-x64/lib/ruby/gems/2.1.0/gems/mysql2
-0.3.17 for inspection.
Results logged to C:/Ruby21-x64/lib/ruby/gems/2.1.0/extensions/x64-mingw32/2.1.0
/mysql2-0.3.17/gem_make.out
C:\Windows\system32>

[kee...@thebrocks.net]

Hi Michal,

This list is general and focused on helping with the infrastructure of finding gems.

For this particular problem, you may want to visit the issue tracker for https://github.com/brianmario/mysql2

They may also have a mailing list for helping you with your issue.

Best of Luck,

Keenan

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