Relocate alpha from ports to libc

Also fixed the following whitespace nits to satisfy the push:

sysdeps/alpha/alphaev6/memset.S:142: space before tab in indent.
sysdeps/alpha/configure:1: new blank line at EOF.
sysdeps/alpha/fpu/e_sqrt.c:126: space before tab in indent.
sysdeps/alpha/preconfigure:1: new blank line at EOF.
sysdeps/unix/sysv/linux/alpha/syscalls.list:1: new blank line at EOF.

1 files changed, 90 insertions, 0 deletions

diff --git a/sysdeps/unix/sysv/linux/alpha/kernel-features.h b/sysdeps/unix/sysv/linux/alpha/kernel-features.h
new file mode 100644
index 0000000000..7c38854c70
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/alpha/kernel-features.h
@@ -0,0 +1,90 @@
+/* Set flags signalling availability of kernel features based on given
+   kernel version number.
+   Copyright (C) 2010-2014 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 _KERNEL_FEATURES_H
+#define _KERNEL_FEATURES_H 1
+
+#define __ASSUME_UTIMES	1
+
+/* Support for the O_CLOEXEC flag was added for alpha in 2.6.23.  */
+#if __LINUX_KERNEL_VERSION >= 0x020617
+# define __ASSUME_O_CLOEXEC    1
+#endif
+
+/* Support for various CLOEXEC and NONBLOCK flags was added for alpha after
+   2.6.33-rc1.  */
+#if __LINUX_KERNEL_VERSION >= 0x020621
+# define __ASSUME_SOCK_CLOEXEC  1
+# define __ASSUME_IN_NONBLOCK   1
+#endif
+
+/* Support for the pipe2, eventfd2, signalfd4 syscalls was added for alpha
+   after 2.6.33-rc1.  */
+#if __LINUX_KERNEL_VERSION >= 0x020621
+# define __ASSUME_PIPE2     1
+# define __ASSUME_EVENTFD2  1
+# define __ASSUME_SIGNALFD4 1
+#endif
+
+/* Support for accept4 was added for alpha after 2.6.33-rc1.  */
+#if __LINUX_KERNEL_VERSION >= 0x020621
+# define __ASSUME_ACCEPT4      1
+#endif
+
+#include_next <kernel-features.h>
+
+#undef __ASSUME_ST_INO_64_BIT
+
+/* pselect/ppoll were introduced on alpha just after 2.6.22-rc1.  */
+#if __LINUX_KERNEL_VERSION < 0x020617
+# undef __ASSUME_PSELECT
+# undef __ASSUME_PPOLL
+#endif
+
+/* The *at syscalls were introduced on alpha just after 2.6.22-rc1.  */
+#if __LINUX_KERNEL_VERSION < 0x020617
+# undef __ASSUME_ATFCTS
+#endif
+
+/* Support for inter-process robust mutexes was added on alpha just
+   after 2.6.22-rc1.  */
+#if __LINUX_KERNEL_VERSION < 0x020617
+# undef __ASSUME_SET_ROBUST_LIST
+#endif
+
+/* Support for utimensat was added on alpha after 2.6.22-rc1.  */
+#if __LINUX_KERNEL_VERSION < 0x020617
+# undef __ASSUME_UTIMENSAT
+#endif
+
+/* Support for fallocate was added for alpha after 2.6.33-rc1.  */
+#if __LINUX_KERNEL_VERSION < 0x020621
+# undef __ASSUME_FALLOCATE
+#endif
+
+/* There never has been support for fstat64.  */
+#undef __ASSUME_STATFS64
+#define __ASSUME_STATFS64 0
+
+/* Support for fsyncdata was added for alpha after 2.6.21.  */
+#if __LINUX_KERNEL_VERSION >= 0x020616
+# define __ASSUME_FDATASYNC	1
+#endif
+
+#endif /* _KERNEL_FEATURES_H */