[newlib-cygwin] Relax visibility for some termios symbols.

[Sebastian Huber]

https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=471f29861e5b764de155d7ca4c5216b4ead5dbe7

commit 471f29861e5b764de155d7ca4c5216b4ead5dbe7
Author: kib <kib@FreeBSD.org>
Date:   Fri Aug 4 09:45:40 2017 +0000

    Relax visibility for some termios symbols.
    
    They are defined by XSI or newer SUS.
    This is a follow-up to r318780.
    
    Reported by:	jbeich
    Obtained from:	DragonflyBSD commit e08b3836c962
    Sponsored by:	The FreeBSD Foundation
    MFC after:	1 week

Diff:
---
 newlib/libc/sys/rtems/include/sys/_termios.h | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/newlib/libc/sys/rtems/include/sys/_termios.h b/newlib/libc/sys/rtems/include/sys/_termios.h
index 2fb4014..eb55bb3 100644
--- a/newlib/libc/sys/rtems/include/sys/_termios.h
+++ b/newlib/libc/sys/rtems/include/sys/_termios.h
@@ -91,8 +91,10 @@
 #define	ICRNL		0x00000100	/* map CR to NL (ala CRMOD) */
 #define	IXON		0x00000200	/* enable output flow control */
 #define	IXOFF		0x00000400	/* enable input flow control */
-#if __BSD_VISIBLE
+#if __XSI_VISIBLE || __POSIX_VISIBLE >= 200809
 #define	IXANY		0x00000800	/* any char will restart after stop */
+#endif
+#if __BSD_VISIBLE
 #define	IMAXBEL		0x00002000	/* ring bell on input queue full */
 #endif
 
@@ -100,12 +102,16 @@
  * Output flags - software output processing
  */
 #define	OPOST		0x00000001	/* enable following output processing */
-#if __BSD_VISIBLE
+#if __XSI_VISIBLE
 #define	ONLCR		0x00000002	/* map NL to CR-NL (ala CRMOD) */
+#endif
+#if __BSD_VISIBLE
 #define	TABDLY		0x00000004	/* tab delay mask */
 #define	    TAB0	    0x00000000	    /* no tab delay and expansion */
 #define	    TAB3	    0x00000004	    /* expand tabs to spaces */
 #define	ONOEOT		0x00000008	/* discard EOT's (^D) on output) */
+#endif
+#if __XSI_VISIBLE
 #define	OCRNL		0x00000010	/* map CR to NL on output */
 #define	ONOCR		0x00000020	/* no CR output at column 0 */
 #define	ONLRET		0x00000040	/* NL performs CR function */