Error installing gem

[cokeito]

after install the gem, i run the rails console and get this error :(

3:03 $ rails c

The dependency tzinfo-data (>= 0) will be unused by any of the platforms Bundler is installing for. Bundler is installing for ruby but the dependency is only for x86-mingw32, x86-mswin32, x64-mingw32, java. To add those platforms to the bundle, run `bundle lock --add-platform x86-mingw32 x86-mswin32 x64-mingw32 java`.

/usr/local/rvm/gems/ruby-2.5.3/gems/bootsnap-1.4.6/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:23:in `require': libortools.so: cannot open shared object file: No such file or directory - /usr/local/rvm/gems/ruby-2.5.3/gems/or-tools-0.2.0/lib/or_tools/ext.so (LoadError)

the ext.so file exists

tried on a rvm version 2.5.3 and 2.4.1, same error

also installed the or-tools from source, without any problem.

Thanks in advance.

[cokeito]

well, after a diggin, i ran an update with

ldconfig -v

and re-bundled the gem and did work! thanks tho

[ankane]

Hey @cokeito, which operating system version are you on?

[cokeito]

debian 9 x64 Thanks for answering

[ankane]

Did you get the Binary installation not available for this platform. error initially?

[cokeito]

i had to install the lib for c++, and after that tried to install the gem with no success.

on one of the tries, (rvm 2.6.1)

got this

dont know if will help for your debug: `nstalling or-tools 0.2.0 with native extensions Gem::Ext::BuildError: ERROR: Failed to build gem native extension.

current directory: /usr/local/rvm/gems/ruby-2.6.1/gems/or-tools-0.2.0/ext/or-tools

/usr/local/rvm/rubies/ruby-2.6.1/bin/ruby -I /usr/local/rvm/rubies/ruby-2.6.1/lib/ruby/site_ruby/2.6.0 -r ./siteconf20200714-20837-1fomnlp.rb extconf.rb checking for -lstdc++... yes extconf.rb failed Could not create Makefile due to some reason, probably lack of necessary libraries and/or headers. Check the mkmf.log file for more details. You may need configuration options.

Provided configuration options: --with-opt-dir --without-opt-dir --with-opt-include --without-opt-include=${opt-dir}/include --with-opt-lib --without-opt-lib=${opt-dir}/lib --with-make-prog --without-make-prog --srcdir=. --curdir --ruby=/usr/local/rvm/rubies/ruby-2.6.1/bin/$(RUBY_BASE_NAME) --with-libpath --without-libpath --with-stdc++lib --without-stdc++lib --with-or-tools-dir --without-or-tools-dir --with-or-tools-include --without-or-tools-include=${or-tools-dir}/include --with-or-tools-lib --without-or-tools-lib=${or-tools-dir}/lib /usr/local/rvm/gems/ruby-2.6.1/gems/or-tools-0.2.0/ext/or-tools/vendor.rb:29:in `<top (required)>': Binary installation not available for this platform. (RuntimeError)

Build the OR-Tools C++ library from source, then run: bundle config build.or-tools --with-or-tools-dir=/path/to/or-tools

    from extconf.rb:17:in `require_relative'
    from extconf.rb:17:in `<main>'

To see why this extension failed to compile, please check the mkmf.log which can be found here:

/usr/local/rvm/gems/ruby-2.6.1/extensions/x86_64-linux/2.6.0/or-tools-0.2.0/mkmf.log

extconf failed, exit code 1

Gem files will remain installed in /usr/local/rvm/gems/ruby-2.6.1/gems/or-tools-0.2.0 for inspection. Results logged to /usr/local/rvm/gems/ruby-2.6.1/extensions/x86_64-linux/2.6.0/or-tools-0.2.0/gem_make.out`

[ankane]

Great, that's expected to Debian 9. What commands did you run to get it to succeed?

[cokeito]

ldconfig -v and re-bundled, dunno if this was needed but it's working Thanks again!

[ankane]

I'm not entirely sure what rebundled means, but glad it's working.

[rodreegez]

Commenting on a closed issue because reasons.

The ldconfig thing is the bit that makes OR Tools work when installing from source. From the man page:

ldconfig creates the necessary links and cache to the most recent shared libraries found in the directories specified on the command line, in the file /etc/ld. so. conf, and in the trusted directories (/lib and /usr/lib). The cache is used by the run-time linker, ld.so or ld-linux.so.

Therfore, when installing OR Tools from source, you need to extract it to either /lib or /usr/lib and the run ldconfig -v. At least I think that's what you need to do?

This isn't made clear in the OR Tools installation guide, but now that I see mention of ldconfig I recall doing this previously to make everything work.

I do wish I remembered about ldconfig before I wiped my machine and installed Ubuntu 18.04 so that the gem would vendor OR Tools for me correctly... :flushed:

Hopefully that helps (someone, somewhen).

[jerhinesmith]

Hopefully that helps (someone, somewhen).

@rodreegez today is your lucky day...