Error while installing iconv on windows by ruby2.0.0

Question

Error while installing iconv on windows by ruby2.0.0
Error while installing iconv on windows by ruby2.0.0

I'm trying to install the iconv , but when I run the following command:

gem install iconv 

my result:

Temporarily enhancing Path to include DevKit...
Building native extensions. This could take a while...
Error : Error installing iconv:
    ERROR: Failed to build gem native extension.

C:/Ruby/Ruby200/bin/ruby.exe -r ./siteconf20150217-3212-i8hzmh.rb extconf.rb
checking for rb_enc_get() in ruby/encoding.h... yes
checking for rb_sys_fail_str() in ruby.h... yes
checking for iconv() in iconv.h... no
checking for iconv() in -liconv... no
*** 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=C:/Ruby/Ruby200/bin/ruby
    --with-iconv-dir
    --without-iconv-dir
    --with-iconv-include
    --without-iconv-include=${iconv-dir}/include
    --with-iconv-lib
    --without-iconv-lib=${iconv-dir}/
    --enable-config-charset
    --disable-config-charset
    --with-config-charset
    --without-config-charset
    --with-iconvlib
    --without-iconvlib

extconf failed, exit code 1

please help me!!!! THX.

Answer 1

I had this problem this evening (Windows 7, Ruby 1.9.3). The solution in my case was as follows:

1. Install the "Complete package, except sources" from http://gnuwin32.sourceforge.net/packages/libiconv.htm

2. Run gem install iconv -v '1.0.4' -- --with-iconv-dir=/path/to/GnuWin32

If that doesn't work, I also followed the instructions here first: http://donpepeto.com/2014/09/20/fixing-c-libraries-on-your-rubyrails-install-on-windows/ (Copying the contents of /bin, /include and /lib from the GnuWin32 install) They didn't work on their own, but once I'd run the setup, I was able to install the gem, so maybe that helped. I also got an error about a missing .gitignore, but I ignored that, ran gem install... again and it worked.

Answer 2

I was facing same issue on windows 10. Thanks @Emma Burrows and @ZeWaren. Following worked for me,

1. Install libiconv; http://gnuwin32.sourceforge.net/packages/libiconv.htm
2. Copy files from /include and /lib into /bin folder, for me C:\Program Files (x86)\GnuWin32\bin
3. Set PATH (Environment Variable) to C:\Program Files (x86)\GnuWin32\bin
4. Exceute (Tricky one): gem install iconv -- --with-iconv-dir="C:\Program Files (x86)\GnuWin32\" and during gem install quickly past files from /bin into C:\RailsInstaller\Ruby2.2.0\lib\ruby\gems\2.2.0\gems\iconv-1.0.4\ext\iconv