*** extconf.rb failed ***

When I try to follow the instruction to install, I got this error when I got to this step:

D:\Programs\Vim\vimfiles\ruby\command-t>ruby extconf.rb
checking for ruby.h... no
couldn't find ruby.h (required)
*** 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=D:/Programs/Ruby187/bin/ruby

• OS: win7
• Vim: 7.2, 7.3
• Ruby 1.87, 1.92
• Dev kit: 3.45, 4.51

Any body can help?

thanks!

Same difficulty here. Strange as ruby.h is in C:\Ruby187\lib\ruby\1.8\i386-mingw32 (for Ruby 1.87, of course).

See thist post, it helped me. Make sure you have all the steps done correctly plus you run the devkitvars.bat script.

It happened to me, the way I solved was: once you open the command prompt and navigate to your command-t installation folder, type in the path execute the devkitvars.bat from your ruby installation folder.

Solved by copying content of C:\Ruby187\mingw into C:\Ruby187\