Error installing FeedZirra

I am new to Ruby on Rails. I am excited about Feed parsing but when I install FeedZirra I am getting this error.

I use Windows 7 and Ruby 1.8.7.

Please help. Thanks in advance.

C:\Ruby187>gem sources -a http://gems.github.com
http://gems.github.com added to sources

C:\Ruby187>gem install pauldix-feedzirra
Building native extensions.  This could take a while...
ERROR:  Error installing pauldix-feedzirra:
        ERROR: Failed to build gem native extension.

C:/Ruby187/bin/ruby.exe extconf.rb
checking for curl-config... no
checking for main() in -lcurl... 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=${opt-dir}/include
        --with-opt-lib
        --without-opt-lib=开发者_StackOverflow${opt-dir}/lib
        --with-make-prog
        --without-make-prog
        --srcdir=.
        --curdir
        --ruby=C:/Ruby187/bin/ruby
        --with-curl-dir
        --without-curl-dir
        --with-curl-include
        --without-curl-include=${curl-dir}/include
        --with-curl-lib
        --without-curl-lib=${curl-dir}/lib
        --with-curllib
        --without-curllib
extconf.rb:12:   Can't find libcurl or curl/curl.h (RuntimeError)

  Try passing --with-curl-dir or --with-curl-lib and --with-curl-include
  options to extconf.


Gem files will remain installed in C:/Ruby187/lib/ruby/gems/1.8/gems/taf2-curb-0
.5.4.0 for inspection.
Results logged to C:/Ruby187/lib/ruby/gems/1.8/gems/taf2-curb-0.5.4.0/ext/gem_ma
ke.out

I tried downloading curl from the link x1a4 had mentioned. It doesn't work with ruby 1.9.2, even with dev toolkit installed:

C:\>gem install feedzirra -- --with-curl-lib=c:\curl-7.21.3-devel-mingw32\lib --with-curl-include=C:\curl-7.21.3-devel-mingw32\include
Temporarily enhancing PATH to include DevKit...
Building native extensions.  This could take a while...
ERROR:  Error installing feedzirra:
        ERROR: Failed to build gem native extension.

C:/Ruby192/bin/ruby.exe extconf.rb --with-curl-lib=c:\curl-7.21.3-devel-mingw32\lib --with-curl-include=C:\curl-7.21.3-devel-mingw32\include
checking for curl-config... no
checking for main() in -lcurl... yes
checking for curl/curl.h... yes
checking for curlinfo_redirect_time... yes
checking for curlinfo_response_code... yes
checking for curlinfo_filetime... yes
checking for curlinfo_redirect_count... yes
checking for curlinfo_os_errno... yes
checking for curlinfo_num_connects... yes
checking for curlinfo_ftp_entry_path... yes
checking for curl_version_ssl... yes
checking for curl_version_libz... yes
checking for curl_version_ntlm... yes
checking for curl_version_gssnegotiate... yes
checking for curl_version_debug... yes
checking for curl_version_asynchdns... yes
checking for curl_version_spnego... yes
checking for curl_version_largefile... yes
checking for curl_version_idn... yes
checking for curl_version_sspi... yes
checking for curl_version_conv... yes
checking for curlproxy_http... yes
checking for curlproxy_socks4... yes
checking for curlproxy_socks5... yes
checking for curlauth_basic... yes
checking for curlauth_digest... yes
checking for curlauth_gssnegotiate... yes
checking for curlauth_ntlm... yes
checking for curlauth_anysafe... yes
checking for curlauth_any... yes
checking for curle_tftp_notfound... yes
checking for curle_tftp_perm... yes
checking for curle_tftp_diskfull... yes
checking for curle_tftp_illegal... yes
checking for curle_tftp_unknownid... yes
checking for curle_tftp_exists... yes
checking for curle_tftp_nosuchuser... yes
checking for curle_send_fail_rewind... yes
checking for curle_ssl_engine_initfailed... yes
checking for curle_login_denied... yes
checking for curlmopt_maxconnects... yes
checking for curle_conv_failed... yes
checking for curle_conv_reqd... yes
checking for curle_ssl_cacert_badfile... yes
checking for curle_remote_file_not_found... yes
checking for curle_ssh... yes
checking for curle_ssl_shutdown_failed... yes
checking for curle_again... yes
checking for curle_ssl_crl_badfile... yes
checking for curle_ssl_issuer_error... yes
checking for curlopt_username... yes
checking for curlopt_password... yes
checking for curlinfo_primary_ip... yes
checking for curlauth_digest_ie... yes
checking for curlftpmethod_multicwd... yes
checking for curlftpmethod_nocwd... yes
checking for curlftpmethod_singlecwd... yes
checking for curlm_bad_socket... yes
checking for curlm_unknown_option... yes
checking for curl_multi_timeout()... no
checking for curl_multi_fdset()... no
checking for curl_multi_perform()... no
checking for Ruby 1.9 Hash... yes
checking for Ruby 1.9 st.h... yes
checking for curl_easy_escape... yes
creating curb_config.h
creating Makefile

make
C:/Ruby192/bin/ruby -e "puts 'EXPORTS', 'Init_curb_core'"  > curb_core-i386-mingw32.def
gcc -I. -IC:/Ruby192/include/ruby-1.9.1/i386-mingw32 -I/C/Ruby192/include/ruby-1.9.1/ruby/backward -I/C/Ruby192/include/ruby-1.9.1 -I. -DRUBY_EXTCONF_
H=\"curb_config.h\" -IC:\curl-7.21.3-devel-mingw32\include    -O3 -g -Wextra -Wno-unused-parameter -Wno-parentheses -Wpointer-arith -Wwrite-strings -W
no-missing-field-initializers -Wno-long-long -Wall  -o curb.o -c curb.c
gcc -I. -IC:/Ruby192/include/ruby-1.9.1/i386-mingw32 -I/C/Ruby192/include/ruby-1.9.1/ruby/backward -I/C/Ruby192/include/ruby-1.9.1 -I. -DRUBY_EXTCONF_
H=\"curb_config.h\" -IC:\curl-7.21.3-devel-mingw32\include    -O3 -g -Wextra -Wno-unused-parameter -Wno-parentheses -Wpointer-arith -Wwrite-strings -W
no-missing-field-initializers -Wno-long-long -Wall  -o curb_easy.o -c curb_easy.c
gcc -I. -IC:/Ruby192/include/ruby-1.9.1/i386-mingw32 -I/C/Ruby192/include/ruby-1.9.1/ruby/backward -I/C/Ruby192/include/ruby-1.9.1 -I. -DRUBY_EXTCONF_
H=\"curb_config.h\" -IC:\curl-7.21.3-devel-mingw32\include    -O3 -g -Wextra -Wno-unused-parameter -Wno-parentheses -Wpointer-arith -Wwrite-strings -W
no-missing-field-initializers -Wno-long-long -Wall  -o curb_errors.o -c curb_errors.c
gcc -I. -IC:/Ruby192/include/ruby-1.9.1/i386-mingw32 -I/C/Ruby192/include/ruby-1.9.1/ruby/backward -I/C/Ruby192/include/ruby-1.9.1 -I. -DRUBY_EXTCONF_
H=\"curb_config.h\" -IC:\curl-7.21.3-devel-mingw32\include    -O3 -g -Wextra -Wno-unused-parameter -Wno-parentheses -Wpointer-arith -Wwrite-strings -W
no-missing-field-initializers -Wno-long-long -Wall  -o curb_multi.o -c curb_multi.c
curb_multi.c: In function 'create_crt_fd':
curb_multi.c:409:17: warning: comparison between signed and unsigned integer expressions
curb_multi.c:412:9: warning: unused variable 'r'
curb_multi.c: In function 'cleanup_crt_fd':
curb_multi.c:424:17: warning: comparison between signed and unsigned integer expressions
gcc -I. -IC:/Ruby192/include/ruby-1.9.1/i386-mingw32 -I/C/Ruby192/include/ruby-1.9.1/ruby/backward -I/C/Ruby192/include/ruby-1.9.1 -I. -DRUBY_EXTCONF_
H=\"curb_config.h\" -IC:\curl-7.21.3-devel-mingw32\include    -O3 -g -Wextra -Wno-unused-parameter -Wno-parentheses -Wpointer-arith -Wwrite-strings -W
no-missing-field-initializers -Wno-long-long -Wall  -o curb_postfield.o -c curb_postfield.c
gcc -I. -IC:/Ruby192/include/ruby-1.9.1/i386-mingw32 -I/C/Ruby192/include/ruby-1.9.1/ruby/backward -I/C/Ruby192/include/ruby-1.9.1 -I. -DRUBY_EXTCONF_
H=\"curb_config.h\" -IC:\curl-7.21.3-devel-mingw32\include    -O3 -g -Wextra -Wno-unused-parameter -Wno-parentheses -Wpointer-arith -Wwrite-strings -W
no-missing-field-initializers -Wno-long-long -Wall  -o curb_upload.o -c curb_upload.c
gcc -shared -s -o curb_core.so curb.o curb_easy.o curb_errors.o curb_multi.o curb_postfield.o curb_upload.o -L. -LC:/Ruby192/lib -Lc:\curl-7.21.3-deve
l-mingw32\lib -L.  -Wl,--enable-auto-image-base,--enable-auto-import curb_core-i386-mingw32.def  -lmsvcrt-ruby191 -lcurl  -lshell32 -lws2_32
curb.o: In function `ruby_curl_conv_q':
C:\Ruby192\lib\ruby\gems\1.9.1\gems\curb-0.7.10\ext/curb.c:214: undefined reference to `_imp__curl_version_info'
curb.o: In function `ruby_curl_sspi_q':
C:\Ruby192\lib\ruby\gems\1.9.1\gems\curb-0.7.10\ext/curb.c:198: undefined reference to `_imp__curl_version_info'
curb.o: In function `ruby_curl_idn_q':
C:\Ruby192\lib\ruby\gems\1.9.1\gems\curb-0.7.10\ext/curb.c:179: undefined reference to `_imp__curl_version_info'
curb.o: In function `ruby_curl_largefile_q':
C:\Ruby192\lib\ruby\gems\1.9.1\gems\curb-0.7.10\ext/curb.c:162: undefined reference to `_imp__curl_version_info'
curb.o: In function `ruby_curl_spnego_q':
C:\Ruby192\lib\ruby\gems\1.9.1\gems\curb-0.7.10\ext/curb.c:146: undefined reference to `_imp__curl_version_info'
curb.o:C:\Ruby192\lib\ruby\gems\1.9.1\gems\curb-0.7.10\ext/curb.c:129: more undefined references to `_imp__curl_version_info' follow
curb.o: In function `Init_curb_core':
C:\Ruby192\lib\ruby\gems\1.9.1\gems\curb-0.7.10\ext/curb.c:226: undefined reference to `_imp__curl_global_init'
C:\Ruby192\lib\ruby\gems\1.9.1\gems\curb-0.7.10\ext/curb.c:227: undefined reference to `_imp__curl_version_info'
C:\Ruby192\lib\ruby\gems\1.9.1\gems\curb-0.7.10\ext/curb.c:232: undefined reference to `_imp__curl_version'
curb_easy.o: In function `ruby_curl_easy_clone':
C:\Ruby192\lib\ruby\gems\1.9.1\gems\curb-0.7.10\ext/curb_easy.c:268: undefined reference to `_imp__curl_easy_duphandle'
curb_easy.o: In function `ruby_curl_easy_unescape':
C:\Ruby192\lib\ruby\gems\1.9.1\gems\curb-0.7.10\ext/curb_easy.c:3171: undefined reference to `_imp__curl_easy_unescape'
C:\Ruby192\lib\ruby\gems\1.9.1\gems\curb-0.7.10\ext/curb_easy.c:3178: undefined reference to `_imp__curl_free'
curb_easy.o: In function `ruby_curl_easy_set_nosignal':
C:\Ruby192\lib\ruby\gems\1.9.1\gems\curb-0.7.10\ext/curb_easy.c:2456: undefined reference to `_imp__curl_easy_setopt'
curb_easy.o: In function `ruby_curl_easy_set_version':
C:\Ruby192\lib\ruby\gems\1.9.1\gems\curb-0.7.10\ext/curb_easy.c:2441: undefined reference to `_imp__curl_easy_setopt'
curb_easy.o: In function `ruby_curl_easy_set_delete_option':
C:\Ruby192\lib\ruby\gems\1.9.1\gems\curb-0.7.10\ext/curb_easy.c:2476: undefined reference to `_imp__curl_easy_setopt'
C:\Ruby192\lib\ruby\gems\1.9.1\gems\curb-0.7.10\ext/curb_easy.c:2473: undefined reference to `_imp__curl_easy_setopt'
curb_easy.o: In function `ruby_curl_easy_set_head_option':
C:\Ruby192\lib\ruby\gems\1.9.1\gems\curb-0.7.10\ext/curb_easy.c:2421: undefined reference to `_imp__curl_easy_setopt'
curb_easy.o:C:\Ruby192\lib\ruby\gems\1.9.1\gems\curb-0.7.10\ext/curb_easy.c:2418: more undefined references to `_imp__curl_easy_setopt' follow
curb_easy.o: In function `ruby_curl_easy_reset':
C:\Ruby192\lib\ruby\gems\1.9.1\gems\curb-0.7.10\ext/curb_easy.c:329: undefined reference to `_imp__curl_easy_reset'
C:\Ruby192\lib\ruby\gems\1.9.1\gems\curb-0.7.10\ext/curb_easy.c:333: undefined reference to `_imp__curl_easy_setopt'
C:\Ruby192\lib\ruby\gems\1.9.1\gems\curb-0.7.10\ext/curb_easy.c:340: undefined reference to `_imp__curl_slist_free_all'
curb_easy.o: In function `ruby_curl_easy_ftp_entry_path_get':
C:\Ruby192\lib\ruby\gems\1.9.1\gems\curb-0.7.10\ext/curb_easy.c:3085: undefined reference to `_imp__curl_easy_getinfo'
curb_easy.o: In function `ruby_curl_easy_num_connects_get':
C:\Ruby192\lib\ruby\gems\1.9.1\gems\curb-0.7.10\ext/curb_easy.c:3044: undefined reference to `_imp__curl_easy_getinfo'
curb_easy.o: In function `ruby_curl_easy_os_errno_get':
C:\Ruby192\lib\ruby\gems\1.9.1\gems\curb-0.7.10\ext/curb_easy.c:3015: undefined reference to `_imp__curl_easy_getinfo'
curb_easy.o: In function `ruby_curl_easy_content_type_get':
C:\Ruby192\lib\ruby\gems\1.9.1\gems\curb-0.7.10\ext/curb_easy.c:2972: undefined reference to `_imp__curl_easy_getinfo'
curb_easy.o: In function `ruby_curl_easy_ssl_verify_result_get':
C:\Ruby192\lib\ruby\gems\1.9.1\gems\curb-0.7.10\ext/curb_easy.c:2915: undefined reference to `_imp__curl_easy_getinfo'
curb_easy.o:C:\Ruby192\lib\ruby\gems\1.9.1\gems\curb-0.7.10\ext/curb_easy.c:2898: more undefined references to `_imp__curl_easy_getinfo' follow
curb_easy.o: In function `ruby_curl_easy_perform_head':
C:\Ruby192\lib\ruby\gems\1.9.1\gems\curb-0.7.10\ext/curb_easy.c:2397: undefined reference to `_imp__curl_easy_setopt'
curb_easy.o: In function `ruby_curl_easy_perform_get':
C:\Ruby192\lib\ruby\gems\1.9.1\gems\curb-0.7.10\ext/curb_easy.c:2224: undefined reference to `_imp__curl_easy_setopt'
curb_easy.o: In function `ruby_curl_easy_new':
C:\Ruby192\lib\ruby\gems\1.9.1\gems\curb-0.7.10\ext/curb_easy.c:226: undefined reference to `_imp__curl_easy_init'
C:\Ruby192\lib\ruby\gems\1.9.1\gems\curb-0.7.10\ext/curb_easy.c:241: undefined reference to `_imp__curl_easy_setopt'
curb_easy.o: In function `cb_each_ftp_command':
C:\Ruby192\lib\ruby\gems\1.9.1\gems\curb-0.7.10\ext/curb_easy.c:1846: undefined reference to `_imp__curl_slist_append'
curb_easy.o: In function `ruby_curl_easy_free':
C:\Ruby192\lib\ruby\gems\1.9.1\gems\curb-0.7.10\ext/curb_easy.c:146: undefined reference to `_imp__curl_slist_free_all'
C:\Ruby192\lib\ruby\gems\1.9.1\gems\curb-0.7.10\ext/curb_easy.c:150: undefined reference to `_imp__curl_slist_free_all'
C:\Ruby192\lib\ruby\gems\1.9.1\gems\curb-0.7.10\ext/curb_easy.c:154: undefined reference to `_imp__curl_easy_cleanup'
C:\Ruby192\lib\ruby\gems\1.9.1\gems\curb-0.7.10\ext/curb_easy.c:146: undefined reference to `_imp__curl_slist_free_all'
C:\Ruby192\lib\ruby\gems\1.9.1\gems\curb-0.7.10\ext/curb_easy.c:150: undefined reference to `_imp__curl_slist_free_all'
C:\Ruby192\lib\ruby\gems\1.9.1\gems\curb-0.7.10\ext/curb_easy.c:154: undefined reference to `_imp__curl_easy_cleanup'
curb_easy.o: In function `ruby_curl_easy_close':
C:\Ruby192\lib\ruby\gems\1.9.1\gems\curb-0.7.10\ext/curb_easy.c:292: undefined reference to `_imp__curl_easy_init'
C:\Ruby192\lib\ruby\gems\1.9.1\gems\curb-0.7.10\ext/curb_easy.c:302: undefined reference to `_imp__curl_easy_setopt'
curb_easy.o: In function `ruby_curl_easy_perform_get':
C:\Ruby192\lib\ruby\gems\1.9.1\gems\curb-0.7.10\ext/curb_easy.c:2224: undefined reference to `_imp__curl_easy_setopt'
curb_easy.o: In function `ruby_curl_easy_perform_head':
C:\Ruby192\lib\ruby\gems\1.9.1\gems\curb-0.7.10\ext/curb_easy.c:2397: undefined reference to `_imp__curl_easy_setopt'
curb_easy.o: In function `ruby_curl_easy_perform_verb_str':
C:\Ruby192\lib\ruby\gems\1.9.1\gems\curb-0.7.10\ext/curb_easy.c:2241: undefined reference to `_imp__curl_easy_setopt'
C:\Ruby192\lib\ruby\gems\1.9.1\gems\curb-0.7.10\ext/curb_easy.c:2241: undefined reference to `_imp__curl_easy_setopt'
curb_easy.o: In function `ruby_curl_easy_escape':
C:\Ruby192\lib\ruby\gems\1.9.1\gems\curb-0.7.10\ext/curb_easy.c:3143: undefined reference to `_imp__curl_easy_escape'
C:\Ruby192\lib\ruby\gems\1.9.1\gems\curb-0.7.10\ext/curb_easy.c:3149: undefined reference to `_imp__curl_free'
curb_easy.o: In function `ruby_curl_easy_perform_verb_str':
C:\Ruby192\lib\ruby\gems\1.9.1\gems\curb-0.7.10\ext/curb_easy.c:2241: undefined reference to `_imp__curl_easy_setopt'
curb_easy.o: In function `cb_each_http_header':
C:\Ruby192\lib\ruby\gems\1.9.1\gems\curb-0.7.10\ext/curb_easy.c:1837: undefined reference to `_imp__curl_slist_append'
curb_easy.o: In function `ruby_curl_easy_put_data_set':
C:\Ruby192\lib\ruby\gems\1.9.1\gems\curb-0.7.10\ext/curb_easy.c:818: undefined reference to `_imp__curl_easy_setopt'
curb_easy.o: In function `ruby_curl_easy_perform_put':
C:\Ruby192\lib\ruby\gems\1.9.1\gems\curb-0.7.10\ext/curb_easy.c:2497: undefined reference to `_imp__curl_easy_setopt'
C:\Ruby192\lib\ruby\gems\1.9.1\gems\curb-0.7.10\ext/curb_easy.c:2497: undefined reference to `_imp__curl_easy_setopt'
curb_easy.o: In function `ruby_curl_easy_post_body_set':
C:\Ruby192\lib\ruby\gems\1.9.1\gems\curb-0.7.10\ext/curb_easy.c:774: undefined reference to `_imp__curl_easy_setopt'
curb_easy.o: In function `ruby_curl_easy_perform_post':
C:\Ruby192\lib\ruby\gems\1.9.1\gems\curb-0.7.10\ext/curb_easy.c:2334: undefined reference to `_imp__curl_easy_setopt'
C:\Ruby192\lib\ruby\gems\1.9.1\gems\curb-0.7.10\ext/curb_easy.c:2353: undefined reference to `_imp__curl_formfree'
curb_easy.o: In function `ruby_curl_easy_setup':
C:\Ruby192\lib\ruby\gems\1.9.1\gems\curb-0.7.10\ext/curb_easy.c:1873: undefined reference to `_imp__curl_easy_setopt'
C:\Ruby192\lib\ruby\gems\1.9.1\gems\curb-0.7.10\ext/curb_easy.c:2124: undefined reference to `_imp__curl_slist_append'
curb_easy.o: In function `ruby_curl_easy_cleanup':
C:\Ruby192\lib\ruby\gems\1.9.1\gems\curb-0.7.10\ext/curb_easy.c:2158: undefined reference to `_imp__curl_slist_free_all'
C:\Ruby192\lib\ruby\gems\1.9.1\gems\curb-0.7.10\ext/curb_easy.c:2164: undefined reference to `_imp__curl_slist_free_all'
C:\Ruby192\lib\ruby\gems\1.9.1\gems\curb-0.7.10\ext/curb_easy.c:2171: undefined reference to `_imp__curl_easy_setopt'
curb_errors.o: In function `rb_curl_easy_error':
C:\Ruby192\lib\ruby\gems\1.9.1\gems\curb-0.7.10\ext/curb_errors.c:442: undefined reference to `_imp__curl_easy_strerror'
curb_errors.o: In function `rb_curl_multi_error':
C:\Ruby192\lib\ruby\gems\1.9.1\gems\curb-0.7.10\ext/curb_errors.c:492: undefined reference to `_imp__curl_multi_strerror'
C:\Ruby192\lib\ruby\gems\1.9.1\gems\curb-0.7.10\ext/curb_errors.c:492: undefined reference to `_imp__curl_multi_strerror'
curb_multi.o: In function `ruby_curl_multi_max_connects':
C:\Ruby192\lib\ruby\gems\1.9.1\gems\curb-0.7.10\ext/curb_multi.c:188: undefined reference to `_imp__curl_multi_setopt'
curb_multi.o: In function `ruby_curl_multi_new':
C:\Ruby192\lib\ruby\gems\1.9.1\gems\curb-0.7.10\ext/curb_multi.c:91: undefined reference to `_imp__curl_multi_init'
curb_multi.o: In function `curl_multi_free':
C:\Ruby192\lib\ruby\gems\1.9.1\gems\curb-0.7.10\ext/curb_multi.c:76: undefined reference to `_imp__curl_multi_cleanup'
curb_multi.o: In function `rb_curl_mutli_handle_complete':
C:\Ruby192\lib\ruby\gems\1.9.1\gems\curb-0.7.10\ext/curb_multi.c:332: undefined reference to `_imp__curl_easy_getinfo'
curb_multi.o: In function `rb_curl_multi_remove':
C:\Ruby192\lib\ruby\gems\1.9.1\gems\curb-0.7.10\ext/curb_multi.c:286: undefined reference to `_imp__curl_multi_remove_handle'
curb_multi.o: In function `rb_curl_mutli_handle_complete':
C:\Ruby192\lib\ruby\gems\1.9.1\gems\curb-0.7.10\ext/curb_multi.c:342: undefined reference to `_imp__curl_slist_free_all'
curb_multi.o: In function `ruby_curl_multi_add':
C:\Ruby192\lib\ruby\gems\1.9.1\gems\curb-0.7.10\ext/curb_multi.c:235: undefined reference to `_imp__curl_multi_add_handle'
C:\Ruby192\lib\ruby\gems\1.9.1\gems\curb-0.7.10\ext/curb_multi.c:248: undefined reference to `_imp__curl_multi_perform'
curb_multi.o: In function `rb_curl_multi_remove':
C:\Ruby192\lib\ruby\gems\1.9.1\gems\curb-0.7.10\ext/curb_multi.c:286: undefined reference to `_imp__curl_multi_remove_handle'
C:\Ruby192\lib\ruby\gems\1.9.1\gems\curb-0.7.10\ext/curb_multi.c:286: undefined reference to `_imp__curl_multi_remove_handle'
curb_multi.o: In function `rb_curl_multi_run':
C:\Ruby192\lib\ruby\gems\1.9.1\gems\curb-0.7.10\ext/curb_multi.c:395: undefined reference to `_imp__curl_multi_perform'
curb_multi.o: In function `ruby_curl_multi_perform':
C:\Ruby192\lib\ruby\gems\1.9.1\gems\curb-0.7.10\ext/curb_multi.c:509: undefined reference to `_imp__curl_multi_fdset'
C:\Ruby192\lib\ruby\gems\1.9.1\gems\curb-0.7.10\ext/curb_multi.c:533: undefined reference to `_imp__curl_multi_info_read'
curb_multi.o: In function `rb_curl_multi_run':
C:\Ruby192\lib\ruby\gems\1.9.1\gems\curb-0.7.10\ext/curb_multi.c:395: undefined reference to `_imp__curl_multi_perform'
curb_multi.o: In function `rb_curl_multi_read_info':
C:\Ruby192\lib\ruby\gems\1.9.1\gems\curb-0.7.10\ext/curb_multi.c:379: undefined reference to `_imp__curl_multi_info_read'
curb_multi.o: In function `rb_curl_multi_run':
C:\Ruby192\lib\ruby\gems\1.9.1\gems\curb-0.7.10\ext/curb_multi.c:395: undefined reference to `_imp__curl_multi_perform'
curb_postfield.o: In function `ruby_curl_postfield_to_str':
C:\Ruby192\lib\ruby\gems\1.9.1\gems\curb-0.7.10\ext/curb_postfield.c:447: undefined reference to `_imp__curl_escape'
C:\Ruby192\lib\ruby\gems\1.9.1\gems\curb-0.7.10\ext/curb_postfield.c:454: undefined reference to `_imp__curl_free'
curb_postfield.o: In function `append_to_form':
C:\Ruby192\lib\ruby\gems\1.9.1\gems\curb-0.7.10\ext/curb_postfield.c:76: undefined reference to `_imp__curl_formadd'
C:\Ruby192\lib\ruby\gems\1.9.1\gems\curb-0.7.10\ext/curb_postfield.c:115: undefined reference to `_imp__curl_formadd'
C:\Ruby192\lib\ruby\gems\1.9.1\gems\curb-0.7.10\ext/curb_postfield.c:120: undefined reference to `_imp__curl_formadd'
collect2: ld returned 1 exit status
make: *** [curb_core.so] Error 1

You need to install libcurl for the curb gem, which your app depends on somewhere. You can get it here, but you're on your own as far as installation goes. I'm not a windows user, sorry.

I also came across this bug on Ubuntu 12.0. The following may help.

sudo apt-get install libcurl3 libcurl3-dbg libcurl3-gnutls libcurl3-nss

gem install feedzirra 

worked!!

On Ubuntu I had to run

sudo apt-get install libcurl3-dev

Then ran the gem install again and it completed successfully.

You need to install libcurl not for curb gem, but for taf2-curb gem , just looking carefull in error log. You can find my answer about installation on taf2-curb.