# Iconv I can not install it

**URL:** <https://discuss.elastic.co/t/iconv-i-can-not-install-it/152783>\
**Category:** Logstash\
**Created:** [October 17, 2018, 9:10am UTC](https://discuss.elastic.co/t/iconv-i-can-not-install-it/152783 "2018-10-17T09:10:48Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![jmkim](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/jmkim/32/37997_2.png) [@jmkim](https://discuss.elastic.co/u/jmkim)\
**Post date:** [October 17, 2018, 9:10am UTC](https://discuss.elastic.co/t/iconv-i-can-not-install-it/152783/1 "2018-10-17T09:10:48Z")

</div>

$ gem install iconv

Building native extensions. This could take a while...  
ERROR: Error installing iconv:  
ERROR: Failed to build gem native extension.

```
current directory: /usr/share/logstash/vendor/bundle/jruby/2.3.0/gems/iconv-1.0.5/ext/iconv

```

/usr/share/logstash/vendor/jruby/bin/jruby -r ./siteconf20181017-6293-1h7kzv2.rb extconf.rb  
checking for rb\_enc\_get() in ruby/encoding.h... RuntimeError: The compiler failed to generate an executable file.  
You have to install development tools first.

- log  
" -o conftest -I/include/universal-java1.8 -I/usr/share/logstash/vendor/jruby/lib/ruby/include/ruby/backward -I/usr/share/logstash/vendor/jruby/lib/ruby/include -I. -fPIC -fno-omit-frame-pointer -fno-strict-aliasing -fexception  
s conftest.c -L. -L/usr/share/logstash/vendor/jruby/lib -m64 "  
checked program was:  
/\* begin \*/  
1: #include "ruby.h"  
2:  
3: #include \<ruby.h\>  
4: int main(int argc, char \*_argv)  
5: {  
6: return 0;  
7: }  
/_ end \*/

I can not find any problems.  
What is the correct way to install?

Thank you!

---

<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [November 14, 2018, 9:10am UTC](https://discuss.elastic.co/t/iconv-i-can-not-install-it/152783/2 "2018-11-14T09:10:53Z")

</div>

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