Consolidate Linux select implementation

This patch consolidates the select Linux syscall implementation on
sysdeps/unix/sysv/linux/select.c.  The changes are:

  1. Remove select from auto-generation syscalls.list on the architecture
     that uses __NR_select.
  2. Remove generic implementation add a default one that handle all
     current cases (with the expection of alpha)
     The new default implementation will either use __NR_select if
     available of fallback to __NR_pselect6 otherwise.
  3. Add a alpha outlier implementation which requires old compatibility
     symbols.

Checked on i686-linux-gnu, x86_64-linux-gnu, x86_64-linux-gnux32,
arch64-linux-gnu, arm-linux-gnueabihf, and powerpc64le-linux-gnu.

	* sysdeps/unix/sysv/linux/alpha/Makefile (sysdep_routines): Add
	osf_select.
	* sysdeps/unix/sysv/linux/alpha/select.c: New file.
	* sysdeps/unix/sysv/linux/alpha/syscalls.list: Remove select and
	osf_select from auto-generation list.
	* sysdeps/unix/sysv/linux/syscalls.list: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc64/syscalls.list: Likewise.
	* sysdeps/unix/sysv/linux/generic/select.c: Remove file.
	* sysdeps/unix/sysv/linux/select.c: New file.

1 files changed, 53 insertions, 0 deletions

diff --git a/sysdeps/unix/sysv/linux/alpha/select.c b/sysdeps/unix/sysv/linux/alpha/select.c
new file mode 100644
index 0000000000..bb0298f6a4
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/alpha/select.c
@@ -0,0 +1,53 @@
+/* Linux/alpha select implementation.
+   Copyright (C) 2017 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/>.  */
+
+#include <sys/time.h>
+#include <sys/types.h>
+#include <sys/select.h>
+#include <errno.h>
+#include <sysdep-cancel.h>
+#include <shlib-compat.h>
+
+int
+__new_select (int nfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds,
+	      struct timeval *timeout)
+{
+  return SYSCALL_CANCEL (select, nfds, readfds, writefds, exceptfds, timeout);
+}
+strong_alias (__new_select, __select)
+libc_hidden_def (__select)
+
+default_symbol_version (__new_select, select, GLIBC_2.1);
+
+strong_alias (__new_select, __new_select_private);
+symbol_version (__new_select_private, __select, GLIBC_2.1);
+
+/* Old timeval32 compat calls.  */
+#if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_1)
+int
+__select_tv32 (int nfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds,
+	       struct timeval *timeout)
+{
+  return SYSCALL_CANCEL (osf_select, nfds, readfds, writefds, exceptfds,
+                        timeout);
+}
+strong_alias (__select_tv32, __select_tv32_1)
+
+compat_symbol (libc, __select_tv32, __select, GLIBC_2_0);
+compat_symbol (libc, __select_tv32_1, select, GLIBC_2_0);
+#endif