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is great, but if you’re an OSX user, and have a comfortable terminal environment set up, you might prefer to use mit-scheme directly from the command line instead of as a separate OSX application. Since it always takes me a minute to remember the steps, I figured I’d write it up.
My goal is to be able to run the interactive mit-schemeshell directly from the command line in OSX.
, either i386 or x86-64 depending on your machine. Mount the .dmg, and drag the “MIT/GNU Scheme” icon into the “Applications” folder.
This is the standard install. From here, you can run MIT/GNU Scheme as if it were any other application, but we don’t want that.
Next, symlink the binary to scheme in your /usr/bin:
$ sudo ln -s /Applications/MIT\:GNU\ Scheme.app/Contents/Resources/mit-scheme /usr/bin/scheme
NOTE: Depending on how you’ve already configured Bash, you’ll want to set this variable in one of three places:
~/.bash_profile~/.bash_login~/.profile On load, Bash tries to find your local profiles in that order. If it finds a file, it won’t load any following profiles. Therefore, you’re going to want to check to see which, if any, of these files already exist, and append to that file. For me, this was~/.profile.
Add the library path to your profile:
$ echo "export MITSCHEME_LIBRARY_PATH=\"/Applications/MIT\:GNU\ Scheme.app/Contents/Resources\"" >> ~/.profile
To make it easier for other applications to find the Scheme executable, you can also add the following environmental variable as well:
$ echo "export MIT_SCHEME_EXE=\"/usr/local/scheme\"" >> ~/.profile
Restart your terminal somehow, or simply reload your bash profile:
$ source ~/.profile
You should now be able to run the MIT/GNU Scheme shell directly from the command line:
$ schemeMIT/GNU Scheme running under MacOSXType `^C' (control-C) followed by `H' to obtain information aboutinterrupts.Copyright (C) 2011 Massachusetts Institute of Technology This is freesoftware; see the source for copying conditions. There is NO warranty; noteven for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.Image saved on Tuesday November 8, 2011 at 10:45:46 PM Release 9.1.1 || Microcode 15.3 || Runtime 15.7 || SF 4.41 || LIAR/x86-64 4.118 Edwin 3.1161 ]=>
And that’s it!
If you’re getting the following error:
$ schemescheme: can't find a readable default for option --band. searched for file all.com in these directories: /usr/local/lib/mit-scheme-x86-64Inconsistency detected.
Chances are that you skipped over my note in the “Export” section above. Running scheme probably ran great for you the first time, but now that some time has passed and you’ve reloaded your terminal, it doesn’t work!
The problem likely is that the environmental variable linking to scheme’s library is not being loaded because you have multiple Bash profile files. Consolidate your profiles and you should be good to go.
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