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[Tutorial] SketchUp Ruby C Extension

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  • T Offline
    thomthom
    last edited by 6 Nov 2011, 15:02

    Huh... I removed all of that stuff completely, as http://blogs.law.harvard.edu/hoanga/2006/12/14/getting-a-ruby-c-extension-to-compile-on-windows/ made no reference to it at all. Worked fine without. Guess it was required due to the way the Pelles C project was set up... ❓

    Thomas Thomassen β€” SketchUp Monkey & Coding addict
    List of my plugins and link to the CookieWare fund

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    • T Offline
      thomthom
      last edited by 6 Nov 2011, 15:46

      Hey Chris, when we get around to writing up the step by step instructions, are you willing to be a guinea pig?

      Thomas Thomassen β€” SketchUp Monkey & Coding addict
      List of my plugins and link to the CookieWare fund

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      • C Offline
        Chris Fullmer
        last edited by 6 Nov 2011, 21:25

        Absolutely!

        Lately you've been tan, suspicious for the winter.
        All my Plugins I've written

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        • T Offline
          thomthom
          last edited by 6 Nov 2011, 22:37

          Great!

          I'm writing up a Basic example that shows a little more than Hello World.

          Then I start on making the step by step Wiki tutorial. I hope people with more know how can fill the in the "why" to much of it. And that people will try it and give feedback on what is unclear and what turns out not to work.

          Thomas Thomassen β€” SketchUp Monkey & Coding addict
          List of my plugins and link to the CookieWare fund

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          • D Offline
            Dan Rathbun
            last edited by 7 Nov 2011, 04:02

            @thomthom said:

            Though I have a suspicion I need to specify the path to where windows.h is located... Though I don't know where to do so...

            To do so via the IDE... from the menu Tools > Options...

            .. brings up the "Options" dialog.
            Choose "VC++ Directories" from the "Projects and Solutions" branch in the nav tree.
            You can see the dirs for catagories by selecting the cat from the "Show directories for:" dropdown control:

            Executable files:
            VCpp_opts_exe.png

            Include files:
            VCpp_opts_inc.png

            I'm not here much anymore.

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            • D Offline
              Dan Rathbun
              last edited by 7 Nov 2011, 04:10

              Don't forget the "help" topic here:
              [Info] C/C++ Ruby extensions & SketchUp plugins
              .. and read Adan Nelson's posts (links on the above list.)

              I'm not here much anymore.

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              • D Offline
                Dan Rathbun
                last edited by 8 Nov 2011, 22:37

                from the info file "win32.readme" in the Ruby C source:
                @unknownuser said:

                You can NOT use a path name [that] contains any white space characters as
                the ruby source directory, this restriction comes from the behavior of include directives of NMAKE.
                (- you may call it a bug. -)

                I'm not here much anymore.

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                • T Offline
                  tbd
                  last edited by 9 Nov 2011, 07:31

                  Thom: #pragma comment(lib, "*.lib") adds the libraries to the link phase (that hold imports and functions code)

                  it was a way to make sure that it will compile even if you create a new project and don't use in mine in PellesC.

                  SketchUp Ruby Consultant | Podium 1.x developer
                  http://plugins.ro

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                  • T Offline
                    thomthom
                    last edited by 9 Nov 2011, 07:36

                    Right'o! Gotcha. Been reading more up on C and GCC.

                    Thomas Thomassen β€” SketchUp Monkey & Coding addict
                    List of my plugins and link to the CookieWare fund

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                    • T Offline
                      tomasz
                      last edited by 9 Nov 2011, 13:44

                      Thanks Thomas for the example.

                      I do not understand what is 'extconf.rb' for. I have compiled my extension under VC++ 2008 without running the file and without using any makefile... Is it bad ? πŸ˜• πŸ’š

                      Author of [Thea Render for SketchUp](http://www.thearender.com/sketchup)

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                      • T Offline
                        tbd
                        last edited by 9 Nov 2011, 14:02

                        extconf.rb - external configuration, it generates the makefile to create the extension. using makefile you can automate builds and tests.

                        SketchUp Ruby Consultant | Podium 1.x developer
                        http://plugins.ro

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                        • T Offline
                          thomthom
                          last edited by 9 Nov 2011, 14:04

                          extconf.rb generates a make file you can use with make under OSX and nmake under Windows.
                          http://ruby-doc.org/docs/ProgrammingRuby/html/ext_ruby.html#UG

                          Thomas Thomassen β€” SketchUp Monkey & Coding addict
                          List of my plugins and link to the CookieWare fund

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                          • T Offline
                            thomthom
                            last edited by 9 Nov 2011, 14:05

                            @unknownuser said:

                            I have compiled my extension under VC++ 2008

                            How big difference is making a Ruby Extension in C++ as oppose to C? ...seeing how Ruby is built in C... ❓

                            Thomas Thomassen β€” SketchUp Monkey & Coding addict
                            List of my plugins and link to the CookieWare fund

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                            • T Offline
                              tomasz
                              last edited by 9 Nov 2011, 14:18

                              @unknownuser said:

                              extconf.rb - external configuration, it generates the makefile to create the extension. using makefile you can automate builds and tests.

                              Got it! In VC++ I have to configure it on my own.

                              @thomthom said:

                              How big difference is making a Ruby Extension in C++ as oppose to C? ...seeing how Ruby is built in C... ❓

                              You certainly would need to enclose declaration of the extension initialization with extern "C":

                              extern "C" {
                              void Init_SX_HelloWorld(); 
                              }
                              

                              I am not really an expert, but I guess all the rest would stay same.

                              Author of [Thea Render for SketchUp](http://www.thearender.com/sketchup)

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                              • T Offline
                                thomthom
                                last edited by 12 Nov 2011, 23:48

                                Added a new example with basic functions. Will start on the tutorial text and images next.

                                Btw, does anyone know how one can make extconf.rb and make/nmake output their files to a given folder? I'd like to make it so that each platform outputs its generated files to separate directories.

                                Thomas Thomassen β€” SketchUp Monkey & Coding addict
                                List of my plugins and link to the CookieWare fund

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                                • C Offline
                                  Chris Fullmer
                                  last edited by 12 Nov 2011, 23:53

                                  What C++ compiler or development environment are you going to write this for so I can go download it and start poking around in it?

                                  Lately you've been tan, suspicious for the winter.
                                  All my Plugins I've written

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                                  • T Offline
                                    thomthom
                                    last edited by 12 Nov 2011, 23:57

                                    I am writing the extensions in C. But under windows I installed Visual C++ Express 2010 because it has the required Windows headers and nmake to compile it. I have some crude notes in the README.txt in the repo. Under OSX you need X Tools from the OSX DVD.

                                    Thomas Thomassen β€” SketchUp Monkey & Coding addict
                                    List of my plugins and link to the CookieWare fund

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                                    • T Offline
                                      thomthom
                                      last edited by 12 Nov 2011, 23:58

                                      Note that I never use the Visual C++ IDE editor.

                                      Thomas Thomassen β€” SketchUp Monkey & Coding addict
                                      List of my plugins and link to the CookieWare fund

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                                      • J Offline
                                        Jim
                                        last edited by 13 Nov 2011, 00:16

                                        Just wondering if there's any reason that MinGW instead of MSVC++ could not be used to compile c extensions. I assume the c extension is a libaray and doesn't require any Windows-specific GUI stuff - it's just a library of functions, right?

                                        Hi

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                                        • D Offline
                                          Dan Rathbun
                                          last edited by 13 Nov 2011, 00:24

                                          @thomthom said:

                                          Btw, does anyone know how one can make extconf.rb and make/nmake output their files to a given folder? I'd like to make it so that each platform outputs its generated files to separate directories.

                                          Did you check the methods defined in "mkmf.rb" ?
                                          (You can also see "Appendix C. Functions Available in extconf.rb" in the "README.EXT" file.)

                                          .. also check our the "extmk.rb" file in the ext dir.

                                          I'm not here much anymore.

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