问题
I have installed Ruby through RVM as instructions on https://github.com/wayneeseguin/rvm#installation.
For information I have all the archives (readline-5.2.tar.gz, readline-6.2.tar.gz, ruby-1.9.3-p327.tar.bz2, rubygems-1.8.24.tgz, wayneeseguin-rvm-stable.tgz and yaml-0.1.4.tar.gz) in ~/.rvm/archives directory and I don't want to re-download them in any way.
When I do:
sudo /usr/bin/apt-get install build-essential openssl libreadline6 libreadline6-dev curl git-core zlib1g zlib1g-dev libssl-dev libyaml-dev libsqlite3-dev sqlite3 libxml2-dev libxslt-dev autoconf libc6-dev ncurses-dev automake libtool bison subversion pkg-config
I get:
Reading package lists... Done
Building dependency tree
Reading state information... Done
Note, selecting 'libxslt1-dev' instead of 'libxslt-dev'
Note, selecting 'libncurses5-dev' instead of 'ncurses-dev'
libtool is already the newest version.
sqlite3 is already the newest version.
libxslt1-dev is already the newest version.
libc6-dev is already the newest version.
openssl is already the newest version.
git-core is already the newest version.
subversion is already the newest version.
zlib1g is already the newest version.
libncurses5-dev is already the newest version.
curl is already the newest version.
libreadline6 is already the newest version.
libyaml-dev is already the newest version.
autoconf is already the newest version.
pkg-config is already the newest version.
libxml2-dev is already the newest version.
build-essential is already the newest version.
libssl-dev is already the newest version.
libreadline6-dev is already the newest version.
automake is already the newest version.
zlib1g-dev is already the newest version.
bison is already the newest version.
libsqlite3-dev is already the newest version.
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
I have even done:
$ rvm pkg install readline
$ rvm reinstall 1.9.2 --with-readline-dir=$rvm_path/usr
But I still get this on irb:
Readline was unable to be required, if you need completion or history install readline then reinstall the ruby. You may follow 'rvm notes' for dependencies and/or read the docs page https://rvm.io/packages/readline/ . Be sure you 'rvm remove X ; rvm install X' to re-compile your ruby with readline support after obtaining the readline libraries.
I have done re-installation process 4-5 times.
回答1:
Your ruby should be most likely installed with readline support if you had the packages from rvm requirements installed.
You can verify that readline is installed by running:
rvm use 1.9.3
find $MY_RUBY_HOME -name readline.so | xargs ldd
From what I see in the responses a proper flow has to be repeated:
rm -rf $rvm_path/usr/
rvm get head
rvm remove 1.9.3
rvm install 1.9.3 --debug
If you still can not get it working - please make double sure you repeat the above steps, do not add additional flags or switches, make sure to clean up /etc/rvmrc and ~/.rvmrc from extra compilation flags. if it all fails provide output of the rvm install 1.9.3 --debug command.
回答2:
What about
rvm reinstall 1.9.3
You could do that once you have installed basic dependencies like build essentials etc. I had similar issue and I had to install some dependencies and reinstalling ruby did the trick.
List of dependencies below
sudo apt-get install build-essential openssl libreadline6 libreadline6-dev curl git-core \
zlib1g zlib1g-dev libssl-dev libyaml-dev libsqlite3-dev sqlite3 libxml2-dev libxslt1-dev \
autoconf libc6-dev libncurses5-dev automake libtool bison subversion pkg-config
回答3:
Considering you have RVM, you should take advantage of the helpful command rvm requirements, as that will give you the command that you need to run for your specific environment/OS.
回答4:
You might just rebuild the ruby executable the old fashioned configure / make way. It shouldn't take that long. The advantage is it'll utilize dependencies it finds such as readline.
来源：https://stackoverflow.com/questions/13965491/how-to-reinstall-ruby-with-readline-support