"You have to install development tools first." Windows


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:intry_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:intry_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:inblock in
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:inopen’
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:inopen’
from C:/ruby191/lib/ruby/1.9.1/mkmf.rb:270:in postpone' from C:/ruby191/lib/ruby/1.9.1/mkmf.rb:667:inchecking_for’
from C:/ruby191/lib/ruby/1.9.1/mkmf.rb:718:in have_library' from extconf.rb:6:in

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

Hope someone can help me.

Thank you very much


Alexandre Alex wrote:

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: