gistfile1.txt

p1030@p1030:~/rails/redmine$ gem install mysql2 -v '0.3.21'
Building native extensions.  This could take a while...
ERROR:  Error installing mysql2:
        ERROR: Failed to build gem native extension.

    /home/.rvm/rubies/ruby-2.2.0/bin/ruby extconf.rb
checking for ruby/thread.h... yes
checking for rb_thread_call_without_gvl() in ruby/thread.h... yes
checking for rb_thread_blocking_region()... no
checking for rb_wait_for_single_fd()... yes
checking for rb_hash_dup()... yes
checking for rb_intern3()... yes
-----
Using mysql_config at /usr/bin/mysql_config
-----
checking for mysql.h... yes
checking for errmsg.h... yes
checking for mysqld_error.h... yes
-----
Setting libpath to /usr/lib/mysql
-----
creating Makefile

make "DESTDIR=" clean

make "DESTDIR="
compiling mysql2_ext.c
compiling result.c
result.c: In function 'msec_char_to_uint':
result.c:189:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
compiling infile.c
compiling client.c
linking shared-object mysql2/mysql2.so
/usr/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-linux-gnu/4.7/../../../../lib/libmysqlclient_r.so when searching for -lmysqlclient_r
/usr/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-linux-gnu/4.7/../../../../lib/libmysqlclient_r.a when searching for -lmysqlclient_r
/usr/bin/ld: skipping incompatible /usr/lib/../lib/libmysqlclient_r.so when searching for -lmysqlclient_r
/usr/bin/ld: skipping incompatible /usr/lib/../lib/libmysqlclient_r.a when searching for -lmysqlclient_r
/usr/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-linux-gnu/4.7/../../../libmysqlclient_r.so when searching for -lmysqlclient_r
/usr/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-linux-gnu/4.7/../../../libmysqlclient_r.a when searching for -lmysqlclient_r
/usr/bin/ld: skipping incompatible /usr/lib/libmysqlclient_r.so when searching for -lmysqlclient_r
/usr/bin/ld: skipping incompatible /usr/lib/libmysqlclient_r.a when searching for -lmysqlclient_r
/usr/bin/ld: cannot find -lmysqlclient_r
collect2: error: ld returned 1 exit status
make: *** [mysql2.so] Error 1

make failed, exit code 2

Gem files will remain installed in /home/.rvm/gems/ruby-2.2.0/gems/mysql2-0.3.21 for inspection.
Results logged to /home/.rvm/gems/ruby-2.2.0/extensions/x86_64-linux/2.2.0/mysql2-0.3.21/gem_make.out