[Bug #849] --enable-shared $B$G(B btest $B$,F0$+$J$$(B

Bug #849: --enable-shared e$B$Ge(B btest e$B$,F0$+$J$$e(B
http://redmine.ruby-lang.org/issues/show/849

e$B5/I<<Te(B: Koichi Sasada
e$B%9%F!<%?%9e(B: Open, e$BM%@hEYe(B: Normal
e$BC4Ev<Te(B: Nobuyoshi N.

configure e$B$re(B --enable-shared
e$B$G%S%k%I$9$k$H!$%m!<%I%Q%9$,IT40A4$J$N$Ge(B
btest-ruby e$B$,Av$j$^$;$s!%e(B

F…build/ruby: error while loading shared libraries: libruby.so.1.9:
cannot open shared object file: No such file or directory