"You have to install development tools first." Windows

A

Alexandre Alex

Hi everybody...!

I'm having some trouble with mkmf.

I'm on Ruby 1.9.1, Windows

Each time I try to use have_library (pretty sure it's not the only
method that doesn't work..), it raises errors:

C:/ruby191/lib/ruby/1.9.1/mkmf.rb:362:in `try_do': The complier failed
to genera
te an executable file. (RuntimeError)
You have to install development tools first.
from C:/ruby191/lib/ruby/1.9.1/mkmf.rb:415:in `try_link0'
from C:/ruby191/lib/ruby/1.9.1/mkmf.rb:419:in `try_link'
from C:/ruby191/lib/ruby/1.9.1/mkmf.rb:527:in `try_func'
from C:/ruby191/lib/ruby/1.9.1/mkmf.rb:723:in `block in
have_library'
from C:/ruby191/lib/ruby/1.9.1/mkmf.rb:668:in `block in
checking_for'
from C:/ruby191/lib/ruby/1.9.1/mkmf.rb:274:in `block (2 levels)
in postp
one'
from C:/ruby191/lib/ruby/1.9.1/mkmf.rb:248:in `open'
from C:/ruby191/lib/ruby/1.9.1/mkmf.rb:274:in `block in
postpone'
from C:/ruby191/lib/ruby/1.9.1/mkmf.rb:248:in `open'
from C:/ruby191/lib/ruby/1.9.1/mkmf.rb:270:in `postpone'
from C:/ruby191/lib/ruby/1.9.1/mkmf.rb:667:in `checking_for'
from C:/ruby191/lib/ruby/1.9.1/mkmf.rb:718:in `have_library'
from extconf.rb:6:in `<main>'
-----

I wonder why? And if it is really caused by the fact that development
tools are missing, how do we install them? Never heard of such a thing
before.

Hope someone can help me.

Thank you very much
 
A

Alex Fenton

Alexandre said:
I'm having some trouble with mkmf.

I'm on Ruby 1.9.1, Windows

Each time I try to use have_library (pretty sure it's not the only
method that doesn't work..), it raises errors:

C:/ruby191/lib/ruby/1.9.1/mkmf.rb:362:in `try_do': The complier failed
to genera
te an executable file. (RuntimeError)
You have to install development tools first.

I'd guess this means that you have to install a C-compiler,
specifically, the one that was used to compile your ruby.

Check the output of "ruby -v". If it looks like "mswin32" then
Microsoft's C Compiler (MSVC) is what you need. If it looks like
"mingw32" then MingW is what you need.

If you have some choice, then I'd see if a MingW build fits your needs.
It's smaller and self-contained. There's numerous places you can go, but
the wxRuby project is currently offering a ready-to-go Ruby-1.9 with
compilation tools for other libraries:

http://rubyforge.org/frs/download.php/51354/wxruby-1.9.10-ruby-1.9.1-mingw32-setup.exe

alex
 

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