Prepare for radical source tree reorganization.zack/build-layout-experiment

All top-level files and directories are moved into a temporary storage
directory, REORG.TODO, except for files that will certainly still
exist in their current form at top level when we're done (COPYING,
COPYING.LIB, LICENSES, NEWS, README), all old ChangeLog files (which
are moved to the new directory OldChangeLogs, instead), and the
generated file INSTALL (which is just deleted; in the new order, there
will be no generated files checked into version control).

1 files changed, 56 insertions, 0 deletions

diff --git a/REORG.TODO/include/ifunc-impl-list.h b/REORG.TODO/include/ifunc-impl-list.h
new file mode 100644
index 0000000000..22ca05f495
--- /dev/null
+++ b/REORG.TODO/include/ifunc-impl-list.h
@@ -0,0 +1,56 @@
+/* Internal header file for __libc_supported_implementations.
+   Copyright (C) 2012-2017 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/>.  */
+
+#ifndef _IFUNC_IMPL_LIST_H
+#define _IFUNC_IMPL_LIST_H	1
+
+#include <stdbool.h>
+#include <stddef.h>
+
+struct libc_ifunc_impl
+{
+  /* The name of function to be tested.  */
+  const char *name;
+  /* The address of function to be tested.  */
+  void (*fn) (void);
+  /* True if this implementation is usable on this machine.  */
+  bool usable;
+};
+
+/* Add an IFUNC implementation, IMPL, for function FUNC, to ARRAY with
+   USABLE at index I and advance I by one.  */
+#define IFUNC_IMPL_ADD(array, i, func, usable, impl) \
+  extern __typeof (func) impl attribute_hidden; \
+  (array)[i++] = (struct libc_ifunc_impl) { #impl, (void (*) (void)) impl, (usable) };
+
+/* Return the number of IFUNC implementations, N, for function FUNC if
+   string NAME matches FUNC.  */
+#define IFUNC_IMPL(n, name, func, ...) \
+  if (strcmp (name, #func) == 0) \
+    { \
+      __VA_ARGS__; \
+      return n; \
+    }
+
+/* Fill ARRAY of MAX elements with IFUNC implementations for function
+   NAME and return the number of valid entries.  */
+extern size_t __libc_ifunc_impl_list (const char *name,
+				      struct libc_ifunc_impl *array,
+				      size_t max);
+
+#endif /* ifunc-impl-list.h */