rails error log

"gcc -o conftest -ID:/Program Files/Ruby192/include/ruby-1.9.1/i386-mingw32 -I"D:/Program Files/Ruby192/include/ruby-1.9.1"/ruby/backward -I"D:/Program Files/Ruby192/include/ruby-1.9.1" -I.     -O3 -g -Wextra -Wno-unused-parameter -Wno-parentheses -Wpointer-arith -Wwrite-strings -Wno-missing-field-initializers -Wno-long-long -O3 -Wall conftest.c  -L. -LD:/Program Files/Ruby192/lib -L.      -lmsvcrt-ruby191-static  -lshell32 -lws2_32  "
In file included from D:/Program Files/Ruby192/include/ruby-1.9.1/ruby.h:32:0,
                 from conftest.c:1:
D:/Program Files/Ruby192/include/ruby-1.9.1/ruby/ruby.h:25:25: fatal error: ruby/config.h: No such file or directory
compilation terminated.
gcc: Files/Ruby192/include/ruby-1.9.1/i386-mingw32: No such file or directory
gcc: Files/Ruby192/lib: No such file or directory
checked program was:
/* begin */
1: #include "ruby.h"
2:
3: #include <winsock2.h>
4: #include <windows.h>
5: int main() {return 0;}
/* end */