{"id":542,"date":"2006-10-27T00:15:09","date_gmt":"2006-10-27T05:15:09","guid":{"rendered":"http:\/\/blogs.law.harvard.edu\/hoanga\/2006\/10\/27\/fixing-mkmf-load-error-ruby-in-ubuntu\/"},"modified":"2006-12-13T22:28:53","modified_gmt":"2006-12-14T03:28:53","slug":"fixing-mkmf-load-error-ruby-in-ubuntu","status":"publish","type":"post","link":"https:\/\/archive.blogs.harvard.edu\/hoanga\/2006\/10\/27\/fixing-mkmf-load-error-ruby-in-ubuntu\/","title":{"rendered":"Fixing ‘mkmf’ load error Ruby in Ubuntu"},"content":{"rendered":"

<\/a><\/p>\n

If you’re a Debian or Ubuntu user you’ll find that the Ruby standard<\/p>\n

distribution is split into lots of little packages so doing something like<\/p>\n

apt-get install ruby<\/em><\/p>\n

only gives you the ruby binary and a subset of the libraries for Ruby. You’ll<\/p>\n

need to add more packages if you want to utilize more of Ruby’s standard<\/p>\n

library. This is all in order to comply with<\/p>\n

Debian packaging Guidelines<\/a>.<\/p>\n

That is all well and good but a little frustrating when you ‘just want to<\/p>\n

do work’.<\/p>\n

For example, I wanted to install <\/p>\n

sys-proctable<\/a><\/p>\n

(Something I really believe should be in Ruby’s standard distribution)<\/p>\n

however ran into the following:<\/p>\n

<\/p>\n

<\/p>\n

$ sudo gem install sys-proctable<\/p>\n

Building native extensions. This could take a while…<\/p>\n

extconf.rb:8:in `require’: no such file to load — mkmf (LoadError)<\/p>\n

    from extconf.rb:8<\/p>\n

ERROR: While executing gem … (RuntimeError)<\/p>\n

   ERROR: Failed to build gem native extension.<\/p>\n

Gem files will remain installed in \/usr\/lib\/ruby\/gems\/1.8\/gems\/sys-proctable-0.7.3 for inspection.<\/p>\n

<\/em><\/p>\n

To get around this you will need to install ruby1.8-dev (or ruby1.6-dev or<\/p>\n

whatever version of ruby you’re running) to get mkmf.rb which is listed<\/p>\n

in the Ruby Standard Library<\/a>.<\/p>\n

I’m sure most Ruby hackers worth their salt consider this a ‘duh’ thing<\/p>\n

but not of all of us can be shining stars in the Ruby community<\/p>\n

How I fixed it…<\/p>\n

<\/p>\n

$ sudo apt-get install ruby1.8-dev<\/p>\n

..<\/p>\n

$ sudo gem install sys-proctable<\/p>\n

Need to update 4 gems from http:\/\/gems.rubyforge.org<\/p>\n

….<\/p>\n

complete<\/p>\n

Building native extensions. This could take a while…<\/p>\n

ruby extconf.rb install sys-proctable<\/p>\n

checking for rb_pid_t… yes<\/p>\n

creating Makefile<\/p>\n

make<\/p>\n

gcc -fPIC -Wall -g -O2 -fPIC -I. -I\/usr\/lib\/ruby\/1.8\/i486-linux -I\/usr\/lib\/ruby\/1.8\/i486-linux -I. -DHAVE_TYPE_RB_PID_T -c proctable.c<\/p>\n

gcc -shared -L”\/usr\/lib” -o proctable.so proctable.o -lruby1.8 -lpthread -ldl -lcrypt -lm -lc<\/p>\n

make install<\/p>\n

mkdir -p \/usr\/lib\/ruby\/gems\/1.8\/gems\/sys-proctable-0.7.3\/lib\/sys<\/p>\n

\/usr\/bin\/install -c -m 0755 proctable.so \/usr\/lib\/ruby\/gems\/1.8\/gems\/sys-proctable-0.7.3\/lib\/sys<\/p>\n

make clean<\/p>\n

Successfully installed sys-proctable-0.7.3<\/p>\n

Installing ri documentation for sys-proctable-0.7.3…<\/p>\n

Installing RDoc documentation for sys-proctable-0.7.3…<\/p>\n

<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"

If you’re a Debian or Ubuntu user you’ll find that the Ruby standard distribution is split into lots of little packages so doing something like apt-get install ruby only gives you the ruby binary and a subset of the libraries for Ruby. You’ll need to add more packages if you want to utilize more of […]<\/p>\n","protected":false},"author":703,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1100,972,615],"tags":[],"class_list":["post-542","post","type-post","status-publish","format-standard","hentry","category-linux","category-programming","category-ruby"],"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/archive.blogs.harvard.edu\/hoanga\/wp-json\/wp\/v2\/posts\/542","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/archive.blogs.harvard.edu\/hoanga\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/archive.blogs.harvard.edu\/hoanga\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/archive.blogs.harvard.edu\/hoanga\/wp-json\/wp\/v2\/users\/703"}],"replies":[{"embeddable":true,"href":"https:\/\/archive.blogs.harvard.edu\/hoanga\/wp-json\/wp\/v2\/comments?post=542"}],"version-history":[{"count":0,"href":"https:\/\/archive.blogs.harvard.edu\/hoanga\/wp-json\/wp\/v2\/posts\/542\/revisions"}],"wp:attachment":[{"href":"https:\/\/archive.blogs.harvard.edu\/hoanga\/wp-json\/wp\/v2\/media?parent=542"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/archive.blogs.harvard.edu\/hoanga\/wp-json\/wp\/v2\/categories?post=542"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/archive.blogs.harvard.edu\/hoanga\/wp-json\/wp\/v2\/tags?post=542"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}