My linking looks broken. It's showing below error.

$ opt
The program 'opt' is currently not installed. You can install it by typing:
apt-get install llvm

and apt-get install llvm-3.6 shows that:

$ apt-get install llvm-3.6
Reading package lists... Done
Building dependency tree
Reading state information... Done
llvm-3.6 is already the newest version.

What am I missing here?


With opt, even llvm is also broken. Could anyone please clear that as well?

$ apt-cache policy llvm
  Installed: (none)
  Candidate: 1:3.4-0ubuntu1
  Version table:
    1:3.4-0ubuntu1 0
    500 http://my.org.url/ubuntu/ trusty/universe amd64 Packages

which opt showing nothing.

  • Edit your question and add the output of apt-cache policy llvm and which opt – A.B. Aug 19 '15 at 13:49
  • The output of apt-cache policy llvm. Not llvm-3.6 and the output of which opt – A.B. Aug 19 '15 at 13:59
  • @A.B. I would like to know the solution as well as reason to downvote. – Saumya Suhagiya Aug 20 '15 at 6:19
  • Again, install llvm as described in my answer. The reason for the downvote, I can not tell you. For this you have to know who it was. And that's not possible. – A.B. Aug 20 '15 at 6:23
  • @A.B. Thanks A.B. The problem with installing llvm directly is: it gives me llvm-3.4 by default, to install llvm-3.6 I need to specify as apt-get install llvm-3.6. I am assuming that might be because it goes by default to our org repo for finding any packages. – Saumya Suhagiya Aug 20 '15 at 6:46

The binary (symbolic link) /usr/bin/opt is in the package llvm. Therefore install with

sudo apt-get install llvm

The installation of this package creates a symbolic link

/usr/bin/opt -> ../lib/llvm-3.6/bin/opt

Or create the link via

sudo ln -s /usr/lib/llvm-3.6/bin/opt /usr/bin/opt

You can check this via apt-file

sudo apt-get install apt-file
sudo apt-file update
apt-file search --regex /opt$

Sample output

glibc-source: /usr/src/glibc/debian/control.in/opt
llvm: /usr/bin/opt
llvm-3.4: /usr/lib/llvm-3.4/bin/opt
llvm-3.5: /usr/lib/llvm-3.5/bin/opt
llvm-3.6: /usr/lib/llvm-3.6/bin/opt
scsh-0.6: /usr/lib/scsh-0.6/opt
|improve this answer|||||
  • Thanks for the answer. But, it is also not working for llvm command. Since I tried for clang as well, it was straight forward with this question, but in same way, its difficult to figure out for llvm. – Saumya Suhagiya Aug 19 '15 at 13:45
  • What do you mean with "I think", have you installed the llvm package? – A.B. Aug 19 '15 at 13:47
  • Yes, I have already installed it, as it's clear from question itself. (I removed unclear part of my comment as well. :) ) – Saumya Suhagiya Aug 19 '15 at 13:48
  • Has this been solved? Although I can confirm your output of apt-file, the file /usr/lib/llvm-4.0/bin/opt simply does not exist. I install llvm and llvm-dev. – Max Beikirch May 11 '17 at 20:12

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