rbenv not setting the ruby version correctly - ruby

Question

I installed rbenv successfully and this appears correct:
piousboxs-MacBook-Pro:lms piousbox$ cat .rbenv-version
1.8.7-p374
piousboxs-MacBook-Pro:lms piousbox$ ruby -v
ruby 1.8.7 (2013-06-27 patchlevel 374) [i686-darwin12.2.1]
piousboxs-MacBook-Pro:lms piousbox$ which ruby
/Users/piousbox/.rbenv/shims/ruby
But when I run bundle, it uses the system ruby somehow?
Installing tiny_tds (0.5.1)
Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension.
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/bin/ruby extconf.rb
checking for iconv_open() in iconv.h... no
checking for iconv_open() in -liconv... yes
checking for sybfront.h... no
-----
freetds is missing.
-----
*** 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.
Can anyone help?

Answer 1

Make sure you install and select a version of Ruby to use; rbenv defaults to the system one, even if you've used rbenv install to add another.
To see which Ruby rbenv is going to use, just run rbenv version.
See rbenv local or rbenv global or rbenv shell for details on how to set the version of Ruby in different contexts.

Answer 2

Emil Sit, the problem is that somehow freetds tries to use the system ruby, even though rbenv is configured correctly. There is this --ruby flag being passed when building native extensions:
Installing tiny_tds (0.5.1)
Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension.
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/bin/ruby extconf.rb --ruby=/Users/piousbox/.rbenv/shims/ruby
checking for iconv_open() in iconv.h... no
checking for iconv_open() in -liconv... yes
checking for sybfront.h... yes
checking for sybdb.h... yes
checking for tdsdbopen() in -lsybdb... no
-----
freetds is missing.
-----
*** 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=/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/bin/ruby
--enable-lookup
--disable-lookup
--with-iconv-dir
--without-iconv-dir
--with-iconv-include
--without-iconv-include=${iconv-dir}/include
--with-iconv-lib
--without-iconv-lib=${iconv-dir}/lib
--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-iconvlib
--without-iconvlib
--with-sybdblib
--without-sybdblib
Gem files will remain installed in /Users/piousbox/.bundler/tmp/26769/gems/tiny_tds-0.5.1 for inspection.
Results logged to /Users/piousbox/.bundler/tmp/26769/gems/tiny_tds-0.5.1/ext/tiny_tds/gem_make.out
An error occurred while installing tiny_tds (0.5.1), and Bundler cannot continue.
Make sure that `gem install tiny_tds -v '0.5.1'` succeeds before bundling.

Answer 3

Make sure you've run rbenv rehash after installing bundler with gem install bundler.

Answer 4

The solution was to remove the system-provided bundler from /usr/local/bundle, as it is outdated and does not run very well. With my new ruby (via rbenv) and bundler (via new ruby) I was able to compile everything correctly.