termios: Consolidate termios c_cc symbolic constants

This patch consolidates the termios symbolic constants used as subscript
for the array c_cc on its own header.  The Linux generic implementation
values match the kernel UAPI and each architecture with deviate values
have their own implementation (in this case alpha, mips64, sparc64, and
powerpc).

No semantic change is expected, checked on a build against x86_64-linux-gnu,
alpha-linux-gnu, mips64-linux-gnu, and sparc64-linux-gnu.

	* sysdeps/unix/sysv/linux/Makefile (sysdeps_headers): Add
	termios-cc.h.
	* sysdeps/unix/sysv/linux/bits/termios-c_cc.h: Likewise.
	* sysdeps/unix/sysv/linux/alpha/bits/termios-c_cc.h: New file.
	* sysdeps/unix/sysv/linux/mips/bits/termios-c_cc.h: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/bits/termios-c_cc.h: Likewise.
	* sysdeps/unix/sysv/linux/sparc/bits/termios-c_cc.h: Likewise.
	* sysdeps/unix/sysv/linux/bits/termios.h (VINTR, VQUIT, VERASE,
	VKILL, VEOF, VTIME, VMIN, VSWTC, VSTART, VSTOP, VSUSP, VEOL,
	VREPRINT, VDISCARD, VWERASE, VLNEXT, VEOLF2): Move to termios-cc.h.
	* sysdeps/unix/sysv/linux/alpha/bits/termios.h: Likewise.
	* sysdeps/unix/sysv/linux/mips/bits/termios.h: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/bits/termios.h: Likewise.
	* sysdeps/unix/sysv/linux/sparc/bits/termios.h: Likewise.

2 files changed, 41 insertions, 19 deletions

diff --git a/sysdeps/unix/sysv/linux/alpha/bits/termios-c_cc.h b/sysdeps/unix/sysv/linux/alpha/bits/termios-c_cc.h
new file mode 100644
index 0000000000..db3aed8840
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/alpha/bits/termios-c_cc.h
@@ -0,0 +1,40 @@
+/* termios c_cc symbolic constant definitions.  Linux/alpha version.
+   Copyright (C) 2019 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library.  If not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#ifndef _TERMIOS_H
+# error "Never include <bits/termios-c_cc.h> directly; use <termios.h> instead."
+#endif
+
+/* c_cc characters */
+#define VEOF 0
+#define VEOL 1
+#define VEOL2 2
+#define VERASE 3
+#define VWERASE 4
+#define VKILL 5
+#define VREPRINT 6
+#define VSWTC 7
+#define VINTR 8
+#define VQUIT 9
+#define VSUSP 10
+#define VSTART 12
+#define VSTOP 13
+#define VLNEXT 14
+#define VDISCARD 15
+#define VMIN 16
+#define VTIME 17
diff --git a/sysdeps/unix/sysv/linux/alpha/bits/termios.h b/sysdeps/unix/sysv/linux/alpha/bits/termios.h
index 6b6fdfb234..fb573f037f 100644
--- a/sysdeps/unix/sysv/linux/alpha/bits/termios.h
+++ b/sysdeps/unix/sysv/linux/alpha/bits/termios.h
@@ -25,25 +25,7 @@ typedef unsigned int	speed_t;
 typedef unsigned int	tcflag_t;
 
 #include <bits/termios-struct.h>
-
-/* c_cc characters */
-#define VEOF 0
-#define VEOL 1
-#define VEOL2 2
-#define VERASE 3
-#define VWERASE 4
-#define VKILL 5
-#define VREPRINT 6
-#define VSWTC 7
-#define VINTR 8
-#define VQUIT 9
-#define VSUSP 10
-#define VSTART 12
-#define VSTOP 13
-#define VLNEXT 14
-#define VDISCARD 15
-#define VMIN 16
-#define VTIME 17
+#include <bits/termios-c_cc.h>
 
 /* c_iflag bits */
 #define IGNBRK	0000001