Use setmode() instead of _setmode()

Looks like Cygwin / MSVC declare it that way, and it still works on
MinGW32 cross.

config.h.in

@@ -81,6 +81,9 @@
 /* Have sched_yield */
 #undef HAVE_SCHED_YIELD
 
+/* Define to 1 if you have the `setmode' function. */
+#undef HAVE_SETMODE
+
 /* Have Solaris __machine_*_barrier and atomic_* operations */
 #undef HAVE_SOLARIS_ATOMIC_OPS
 
@@ -117,9 +120,6 @@
 /* Define to 1 if you have the <unistd.h> header file. */
 #undef HAVE_UNISTD_H
 
-/* Define to 1 if you have the `_setmode' function. */
-#undef HAVE__SETMODE
-
 /* Define to the sub-directory in which libtool stores uninstalled libraries.
    */
 #undef LT_OBJDIR

configure.ac

@@ -55,7 +55,7 @@ dnl GOBJECT_INTROSPECTION_CHECK([0.9.0])
 dnl GTK_DOC_CHECK([1.15],[--flavour no-tmpl])
 
 # Functions and headers
-AC_CHECK_FUNCS(atexit mprotect sysconf getpagesize mmap _setmode isatty)
+AC_CHECK_FUNCS(atexit mprotect sysconf getpagesize mmap setmode isatty)
 AC_CHECK_HEADERS(unistd.h sys/mman.h io.h)
 
 # Compiler flags

util/options.cc

@@ -414,7 +414,7 @@ font_options_t::get_font (void) const
       GString *gs = g_string_new (NULL);
       char buf[BUFSIZ];
 #ifdef HAVE__SETMODE
-      _setmode (fileno (stdin), _O_BINARY);
+      setmode (fileno (stdin), _O_BINARY);
 #endif
       while (!feof (stdin)) {
 	size_t ret = fread (buf, 1, sizeof (buf), stdin);

util/options.hh

@@ -44,7 +44,7 @@
 #include <unistd.h> /* for isatty() */
 #endif
 #ifdef HAVE_IO_H
-#include <io.h> /* for _setmode() under Windows */
+#include <io.h> /* for setmode() under Windows */
 #endif
 
 #include <hb.h>