"gcc -o conftest -I../../.ext/include/i386-cygwin -I../.././include/ruby/backward -I../.././include -I../.././ext/bigdecimal     -O3 -g -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 conftest.c  -L. -L/usr/local/lib -L.      -lruby191  -lpthread -lrt -ldl -lcrypt  "
/usr/lib/gcc/i686-pc-cygwin/4.5.3/../../../../i686-pc-cygwin/bin/ld: cannot find -lruby191
collect2: ld はステータス 1 で終了しました
checked program was:
/* begin */
1: #include "ruby.h"
2: 
3: int main() {return 0;}
/* end */