Can´t install tiny_tds in Windows 10 - ruby-on-rails

Question

When I run:
gem install tiny_tds
The output tells me that I need FreeTDS installed. Next, it shows me some configuration options and that I'll probably need an option. The options are the following:
--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:/Ruby31-x64/bin/$(RUBY_BASE_NAME)
--help
--with-freetds-dir
--without-freetds-dir
--with-freetds-include
--without-freetds-include=${freetds-dir}/include
--with-freetds-lib
--without-freetds-lib=${freetds-dir}/lib
--with-sybdb-dir
--without-sybdb-dir
--with-sybdb-include
--without-sybdb-include=${sybdb-dir}/include
--with-sybdb-lib
--without-sybdb-lib=${sybdb-dir}/lib
--with-sybdblib
--without-sybdblib
--with-sybdblib
--without-sybdblib
The problem is that none of the options work. Here´s an example of what happens:
C:\RailsApps>gem install tiny_tds -- --with-freetds-dir
Temporarily enhancing PATH for MSYS/MINGW...
Using msys2 packages: mingw-w64-ucrt-x86_64-freetds
Building native extensions with: '--with-freetds-dir'
This could take a while...
ERROR: Error installing tiny_tds:
ERROR: Failed to build gem native extension.
current directory: C:/Ruby31-x64/lib/ruby/gems/3.1.0/gems/tiny_tds-2.1.5/ext/tiny_tds
C:/Ruby31-x64/bin/ruby.exe -I C:/Ruby31-x64/lib/ruby/3.1.0 -r ./siteconf20220308-11104-
42q9r4.rb extconf.rb --with-freetds-dir
*** extconf.rb failed ***
Could not create Makefile due to some reason, probably lack of necessary
libraries and/or headers. Check the mkmf.log file for more details. You may
need configuration options.
Provided configuration options:
--with-opt-dir
--without-opt-dir
--with-opt-include
--without-opt-include=${opt-dir}/include
--with-opt-lib
--without-opt-lib=${opt-dir}/lib
--with-make-prog
--without-make-prog
--srcdir=.
--curdir
--ruby=C:/Ruby31-x64/bin/$(RUBY_BASE_NAME)
--help
--with-freetds-dir
C:/Ruby31-x64/lib/ruby/3.1.0/mkmf.rb:1807:in `dir_config': undefined method `split' for true:TrueClass (NoMethodError)
defaults = Array === dir ? dir : dir.split(File::PATH_SEPARATOR)
^^^^^^
from extconf.rb:56:in `<main>'
looking for freetds headers in the following directories:
- /opt/local/include
- /opt/local/include/freetds
- /usr/local/include
- /usr/local/include/freetds
looking for freetds library in the following directories:
- /opt/local/lib
- /opt/local/lib/freetds
- /usr/local/lib
- /usr/local/lib/freetds
extconf failed, exit code 1
Gem files will remain installed in C:/Ruby31-x64/lib/ruby/gems/3.1.0/gems/tiny_tds-2.1.5 for inspection.
Results logged to C:/Ruby31-x64/lib/ruby/gems/3.1.0/extensions/x64-mingw-ucrt/3.1.0/tiny_tds-2.1.5/gem_make.out
I found an downloaded the FreeTDS binaries to try the Windows manual installation, but I don´t know where to place them or how to use them.

Answer 1

I figured it out thanks to the previous posts, by looking at the freetds windows zipfile and the installed pacman package.
It's probably looking for the include folder headers at C:\Ruby31-x64\msys64\ucrt64\include
However it is at C:\Ruby31-x64\msys64\ucrt64\include\freetds
The .exe files interestingly are at C:\Ruby31-x64\msys64\ucrt64\bin and are found.
gem install tiny_tds -- --with-freetds-include=C:\Ruby31-x64\msys64\ucrt64\include\freetds
also see: Tiny TDS GitHub Issue 503

Answer 2

Well, thanks to Jared Beck, I finally was able to precompile the FreeTDS binaries. I used Ruby on Rails in the past, but never needed to do such thing, so I didn´t know the syntax. I thought that running the command gem install tiny_tds included the FreeTDS installation. Then I noticed the configuration options and tried running gem install tiny_tds -- --with-freetds-dir, but didn´t know that the command required the directory as an argument.
Finally, I downloaded the FreeTDS Windows binary from https://sourceforge.net/projects/freetdswindows/, extracted it in C:, and ran the following command:
gem install tiny_tds -- --with-freetds-dir=C:\freetds-1.00