Enable utf8 I/O stuff when compiling with MinGW.
diff --git a/configure.ac b/configure.ac
index bda568f..12e2907 100644
--- a/configure.ac
+++ b/configure.ac
@@ -124,16 +124,19 @@
esac
AM_CONDITIONAL(FLaC__CPU_PPC_SPE, test "x$abi_spe" = xtrue)
+os_is_windows=no
case "$host" in
*-*-cygwin|*mingw*|*emx*)
# define this variable for enabling strict exports with libtool; for now, it's supported by Win32 and OS/2
LT_NO_UNDEFINED="-no-undefined"
+ os_is_windows=yes
;;
*)
LT_NO_UNDEFINED=
;;
esac
AC_SUBST(LT_NO_UNDEFINED)
+AM_CONDITIONAL(OS_IS_WINDOWS, test "x$os_is_windows" = xyes)
case "$host" in
*-pc-linux-gnu)