checking for Ruby version >= 1.8.5... -------------------- yes

--------------------

"gcc -o conftest -IC:/usr/bin/Ruby193/include/ruby-1.9.1/i386-mingw32 -IC:/usr/bin/Ruby193/include/ruby-1.9.1/ruby/backward -IC:/usr/bin/Ruby193/include/ruby-1.9.1 -I. -IC:/Progra~1/ImageMagick-6.7.9-Q16/include -DFD_SETSIZE=32767  -DFD_SETSIZE=32767  -O3 -fno-omit-frame-pointer -ggdb -Wextra -Wno-unused-parameter -Wno-parentheses -Wno-long-long -Wno-missing-field-initializers -Wpointer-arith -Wwrite-strings -Wdeclaration-after-statement -Wimplicit-function-declaration conftest.c  -L. -LC:/usr/bin/Ruby193/lib -LC:/Progra~1/ImageMagick-6.7.9-Q16/lib -L.    -lCORE_RL_magick_ -lX11  -lmsvcrt-ruby191  -lshell32 -lws2_32 -limagehlp  "
c:/usr/bin/ruby193/mingw/bin/../lib/gcc/mingw32/4.5.2/../../../../mingw32/bin/ld.exe: cannot find -lCORE_RL_magick_
c:/usr/bin/ruby193/mingw/bin/../lib/gcc/mingw32/4.5.2/../../../../mingw32/bin/ld.exe: cannot find -lX11
collect2: ld returned 1 exit status
checked program was:
/* begin */
1: #include "ruby.h"
2: 
3: #include <winsock2.h>
4: #include <windows.h>
5: int main() {return 0;}
/* end */