conftest.c:16:1: error: too few arguments to function 'main'

I need help for this !!!! I didn't find the solution.

c:\Ruby22-x64\DevKit>gem install mysql
Fetching: mysql-2.9.1.gem (100%)
Temporarily enhancing PATH to include DevKit...
Building native extensions. This could take a while...
ERROR: Error installing mysql:
ERROR: Failed to build gem native extension.

c:/Ruby22-x64/bin/ruby.exe -r ./siteconf20150704-3056-lh90nt.rb extconf.rb
checking for main() in -llibmysql... 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:/Ruby22-x64/bin/$(RUBY_BASE_NAME)
--with-mysql-dir
--without-mysql-dir
--with-mysql-include
--without-mysql-include=${mysql-dir}/include
--with-mysql-lib
--without-mysql-lib=${mysql-dir}/lib
--with-libmysqllib
--without-libmysqllib

extconf failed, exit code 1

Gem files will remain installed in c:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/mysql-2.9.1 for inspection.
Results logged to c:/Ruby22-x64/lib/ruby/gems/2.2.0/extensions/x64-mingw32/2.2.0/mysql-2.9.1/gem_make.out

Inspecting mkmf.log :

"x86_64-w64-mingw32-gcc -o conftest.exe -Ic:/Ruby22-x64/include/ruby-2.2.0/x64-mingw32 -Ic:/Ruby22-x64/include/ruby-2.2.0/ruby/backward -Ic:/Ruby22-x64/include/ruby-2.2.0 -I. -DFD_SETSIZE=2048 -D_WIN32_WINNT=0x0501 -D__MINGW_USE_VC2005_COMPAT -D_FILE_OFFSET_BITS=64 -O3 -fno-omit-frame-pointer -fno-fast-math -g -Wall -Wextra -Wno-unused-parameter -Wno-parentheses -Wno-long-long -Wno-missing-field-initializers -Wunused-variable -Wpointer-arith -Wwrite-strings -Wdeclaration-after-statement -Wimplicit-function-declaration -Wdeprecated-declarations -Wno-packed-bitfield-compat conftest.c -L. -Lc:/Ruby22-x64/lib -L. -lx64-msvcrt-ruby220 -llibmysql -lshell32 -lws2_32 -liphlpapi -limagehlp -lshlwapi "
conftest.c: In function 't':
conftest.c:16:1: error: too few arguments to function 'main'
conftest.c:8:5: note: declared here
checked program was:
/* begin */
1: #include "ruby.h"
2:
3: #include
4: #include
5:
6: /*top*/
7: extern int t(void);
8: int main(int argc, char **argv)
9: {
10: if (argc > 1000000) {
11: printf("%p", &t);
12: }
13:
14: return 0;
15: }
16: int t(void) { main(); return 0; }
/* end */

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