current directory: /usr/local/rvm/gems/ruby-2.3.3@redmine/gems/mysql2-0.4.8/ext/mysql2
/usr/local/rvm/rubies/ruby-2.3.3/bin/ruby -r ./siteconf20170711-39644-9k4zgk.rb extconf.rb
checking for rb_absint_size()... yes
checking for rb_absint_singlebit_p()... yes
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
checking for rb_big_cmp()... 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
checking for SSL_MODE_DISABLED in mysql.h... no
checking for MYSQL_OPT_SSL_ENFORCE in mysql.h... yes
checking for MYSQL.net.vio in mysql.h... no
checking for MYSQL.net.pvio in mysql.h... yes
-----
Setting libpath to /usr/lib64
-----
creating Makefile

current directory: /usr/local/rvm/gems/ruby-2.3.3@redmine/gems/mysql2-0.4.8/ext/mysql2
make "DESTDIR=" clean

current directory: /usr/local/rvm/gems/ruby-2.3.3@redmine/gems/mysql2-0.4.8/ext/mysql2
make "DESTDIR="
compiling client.c
In file included from ./mysql2_ext.h:41:0,
                 from client.c:1:
client.c: In function ‘rb_set_ssl_mode_option’:
./client.h:56:3: warning: ISO C90 forbids mixed declarations and code [-Wdeclaration-after-statement]
   mysql_client_wrapper *wrapper; \
   ^
client.c:116:3: note: in expansion of macro ‘GET_CLIENT’
   GET_CLIENT(self);
   ^
client.c:117:3: warning: ISO C90 forbids mixed declarations and code [-Wdeclaration-after-statement]
   int val = NUM2INT( setting );
   ^
client.c:143:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^
compiling infile.c
compiling mysql2_ext.c
compiling result.c
result.c: In function ‘rb_mysql_result_alloc_result_buffers’:
result.c:326:40: warning: assignment from incompatible pointer type [enabled by default]
     wrapper->result_buffers[i].is_null = &wrapper->is_null[i];
                                        ^
result.c:328:40: warning: assignment from incompatible pointer type [enabled by default]
     wrapper->result_buffers[i].error   = &wrapper->error[i];
                                        ^
compiling statement.c
statement.c: In function ‘rb_raise_mysql2_stmt_error’:
statement.c:50:3: warning: ISO C90 forbids mixed declarations and code [-Wdeclaration-after-statement]
   VALUE rb_error_msg = rb_str_new2(mysql_stmt_error(stmt_wrapper->stmt));
   ^
statement.c:57:3: warning: ISO C90 forbids mixed declarations and code [-Wdeclaration-after-statement]
   rb_encoding *default_internal_enc = rb_default_internal_encoding();
   ^
In file included from ./mysql2_ext.h:41:0,
                 from statement.c:1:
statement.c: In function ‘execute’:
./client.h:56:3: warning: ISO C90 forbids mixed declarations and code [-Wdeclaration-after-statement]
   mysql_client_wrapper *wrapper; \
   ^
statement.c:273:3: note: in expansion of macro ‘GET_CLIENT’
   GET_CLIENT(stmt_wrapper->client);
   ^
statement.c:395:13: warning: ISO C90 forbids mixed declarations and code [-Wdeclaration-after-statement]
             VALUE rb_val_as_string = rb_funcall(argv[i], intern_to_s, 0);
             ^
In file included from ./mysql2_ext.h:41:0,
                 from statement.c:1:
statement.c: In function ‘fields’:
./client.h:56:3: warning: ISO C90 forbids mixed declarations and code [-Wdeclaration-after-statement]
   mysql_client_wrapper *wrapper; \
   ^
statement.c:471:3: note: in expansion of macro ‘GET_CLIENT’
   GET_CLIENT(stmt_wrapper->client);
   ^
linking shared-object mysql2/mysql2.so
/usr/bin/ld: cannot find -lmariadb
collect2: error: ld returned 1 exit status
make: *** [mysql2.so] Error 1

make failed, exit code 2