Ruby - Installing gem eventmachine

Hi fellas!

Trying this:

$ gem install eventmachine

Returned me this:

make
compiling ssl.cpp
make: g++: Command not found
make: *** [ssl.o] Error 127

The solution is installing the build-essential package:

$ sudo apt-get install build-essential

Problem solved!

Ruby - Installing gem debugger

Hi fellas!

Tryin this:

$ gem install debugger

Returned this:

checking for vm_core.h... no
checking for vm_core.h... no
Makefile creation failed
**************************************************************************
No source for ruby-1.9.3-p286 provided with debugger-ruby_core_source gem.
**************************************************************************

Reading the error I tried this:

$ gem install debugger -- --with-ruby-include=/home/$(echo $USER)/.rvm/src/ruby-$(ruby -v | cut -d" " -f2)

Problem solved.

Adios!

PostgreSQL - Problem installing gem

Hi fellas!

I was trying for a few days to solve a problem installing pg gem.

The error was about this freaking file: libpq-fe.h

The solution was to uninstall all my postgresql and install these two packages:

$ sudo apt-get install postgresql-9.1
$ sudo apt-get install postgresql-server-dev-9.1

Then you can install your gem with easy.

$ gem install pg

Adios!

MySQL - Error trying to install gem

Hi fellas!

Installing mysql gem I got this:

Could not create Makefile due to some reason, probably lack of
necessary libraries and/or headers.

Which is a well known error for ruby users. It's all about lack of developer libraries.

To solve it I had to:

$ apt-get install libmysqlclient-dev

Adios!

Ruby - Error fetching data

Hi fellas.

I was trying to install mysql gem and got this message:

WARNING: Error fetching data: SocketError: getaddrinfo: Name or service not known (http://rubygems.org/latest_specs.4.8.gz)
ERROR: Could not find a valid gem 'mysql' (>= 0) in any repository
ERROR: Possible alternatives: mysql

That's weird isn't it? Couldn't find mysql and a possible alternative is mysql?

Not thinking too much I remembered I had a proxy change on my system. Set it to none and same problem.

Googling a bit I found this: --no-http-proxy

$ gem install mysql --no-http-proxy

Problem solved and lesson learned. The gem install remembers my last proxy configuration and stick with it regardless of its availability.

Adios!

PostgreSQL - Install gem

Hi fellas!

Was trying to install PostgreSQL gem and guess what.

Problem!!!

ERROR: Error installing pg:
ERROR: Failed to build gem native extension.
Bla bla bla
...

The solution?

sudo apt-get install libpq-dev

Adios!

Ruby - Can't Install Curb

Hi fellas!

When trying to install Curb(0.7.15) with native extensions I got this message:

Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension.
        /home/daniel/.rvm/rubies/ruby-1.9.3-p194/bin/ruby extconf.rb
checking for curl-config... no
checking for main() in -lcurl... no
*** 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=/home/daniel/.rvm/rubies/ruby-1.9.3-p194/bin/ruby
--with-curl-dir
--without-curl-dir
--with-curl-include
--without-curl-include=${curl-dir}/include
--with-curl-lib
--without-curl-lib=${curl-dir}/lib
--with-curllib
--without-curllib
extconf.rb:23:in `<main>':   Can't find libcurl or curl/curl.h (RuntimeError)
  Try passing --with-curl-dir or --with-curl-lib and --with-curl-include
  options to extconf.

Gem files will remain installed in /home/daniel/.rvm/gems/ruby-1.9.3-p194/gems/curb-0.7.15 for inspection.
Results logged to /home/daniel/.rvm/gems/ruby-1.9.3-p194/gems/curb-0.7.15/ext/gem_make.out
An error occurred while installing curb (0.7.15), and Bundler cannot continue.
Make sure that `gem install curb -v '0.7.15'` succeeds before bundling.

As suggested, I tried to install curb but no success!

The solution?

Install this: libcurl4-gnutls-dev and guess what, problem SOLVED!

On Fedora you do:

$ yum install libcurl -devel.(64 or 32 bit version)

Adios!