**sudo sensu-install -p sensu-plugins-mailer **
[SENSU-INSTALL] installing Sensu plugins …
[SENSU-INSTALL] determining if Sensu plugin gem ‘sensu-plugins-mailer’ is already installed …
false
[SENSU-INSTALL] Sensu plugin gems to be installed: [“sensu-plugins-mailer”]
[SENSU-INSTALL] installing Sensu plugin gem ‘sensu-plugins-mailer’
Building native extensions. This could take a while…
ERROR: Error installing sensu-plugins-mailer:
ERROR: Failed to build gem native extension.
current directory: /opt/sensu/embedded/lib/ruby/gems/2.3.0/gems/unf_ext-0.0.7.2/ext/unf_ext
/opt/sensu/embedded/bin/ruby -r ./siteconf20160711-4213-2izps9.rb extconf.rb
checking for main() in -lstdc++… *** 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
–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=/opt/sensu/embedded/bin/$(RUBY_BASE_NAME)
–with-static-libstdc++
–without-static-libstdc++
–with-stdc++lib
–without-stdc++lib
/opt/sensu/embedded/lib/ruby/2.3.0/mkmf.rb:456:in `try_do’: The compiler failed to generate an executable file. (RuntimeError)
You have to install development tools first.
from /opt/sensu/embedded/lib/ruby/2.3.0/mkmf.rb:541:in `try_link0’
from /opt/sensu/embedded/lib/ruby/2.3.0/mkmf.rb:556:in `try_link’
from /opt/sensu/embedded/lib/ruby/2.3.0/mkmf.rb:765:in `try_func’
from /opt/sensu/embedded/lib/ruby/2.3.0/mkmf.rb:997:in `block in have_library’
from /opt/sensu/embedded/lib/ruby/2.3.0/mkmf.rb:942:in `block in checking_for’
from /opt/sensu/embedded/lib/ruby/2.3.0/mkmf.rb:350:in `block (2 levels) in postpone’
from /opt/sensu/embedded/lib/ruby/2.3.0/mkmf.rb:320:in `open’
from /opt/sensu/embedded/lib/ruby/2.3.0/mkmf.rb:350:in `block in postpone’
from /opt/sensu/embedded/lib/ruby/2.3.0/mkmf.rb:320:in `open’
from /opt/sensu/embedded/lib/ruby/2.3.0/mkmf.rb:346:in `postpone’
from /opt/sensu/embedded/lib/ruby/2.3.0/mkmf.rb:941:in `checking_for’
from /opt/sensu/embedded/lib/ruby/2.3.0/mkmf.rb:992:in `have_library’
from extconf.rb:6:in `’
To see why this extension failed to compile, please check the mkmf.log which can be found here:
/opt/sensu/embedded/lib/ruby/gems/2.3.0/extensions/x86_64-linux/2.3.0/unf_ext-0.0.7.2/mkmf.log
extconf failed, exit code 1
Gem files will remain installed in /opt/sensu/embedded/lib/ruby/gems/2.3.0/gems/unf_ext-0.0.7.2 for inspection.
Results logged to /opt/sensu/embedded/lib/ruby/gems/2.3.0/extensions/x86_64-linux/2.3.0/unf_ext-0.0.7.2/gem_make.out
[SENSU-INSTALL] failed to install Sensu plugin gem ‘sensu-plugins-mailer’
[SENSU-INSTALL] you can run the sensu-install command again with --verbose for more info
[SENSU-INSTALL] please take note of any failure messages above
[SENSU-INSTALL] make sure you have build tools installed (e.g. gcc)
[SENSU-INSTALL] trying to determine the Sensu plugin homepage for sensu-plugins-mailer …
homepage: https://github.com/sensu-plugins/sensu-plugins-mailer
Facing the above issue with centos7