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, 92 insertions, 0 deletions

diff --git a/REORG.TODO/csu/gmon-start.c b/REORG.TODO/csu/gmon-start.c
new file mode 100644
index 0000000000..a1f92d5e1a
--- /dev/null
+++ b/REORG.TODO/csu/gmon-start.c
@@ -0,0 +1,92 @@
+/* Code to enable profiling at program startup.
+   Copyright (C) 1995-2017 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.
+
+   In addition to the permissions in the GNU Lesser General Public
+   License, the Free Software Foundation gives you unlimited
+   permission to link the compiled version of this file with other
+   programs, and to distribute those programs without any restriction
+   coming from the use of this file.  (The GNU Lesser General Public
+   License restrictions do apply in other respects; for example, they
+   cover modification of the file, and distribution when not linked
+   into another program.)
+
+   Note that people who make modified versions of this file are not
+   obligated to grant this special exception for their modified
+   versions; it is their choice whether to do so.  The GNU Lesser
+   General Public License gives permission to release a modified
+   version without this exception; this exception also makes it
+   possible to release a modified version which carries forward this
+   exception.
+
+   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/types.h>
+#include <sys/gmon.h>
+#include <stdlib.h>
+#include <unistd.h>
+#define __ASSEMBLY__
+#include <entry.h>
+
+/* Beginning and end of our code segment. We cannot declare them
+   as the external functions since we want the addresses of those
+   labels. Taking the address of a function may have different
+   meanings on different platforms. */
+#ifdef ENTRY_POINT_DECL
+ENTRY_POINT_DECL(extern)
+#else
+extern char ENTRY_POINT[];
+#endif
+extern char etext[];
+
+#ifndef TEXT_START
+# ifdef ENTRY_POINT_DECL
+#  define TEXT_START ENTRY_POINT
+# else
+#  define TEXT_START &ENTRY_POINT
+# endif
+#endif
+
+#ifdef GMON_START_ARRAY_SECTION
+static void __gmon_start__ (void);
+static void (*const gmon_start_initializer) (void)
+  __attribute__ ((used, section (GMON_START_ARRAY_SECTION))) = &__gmon_start__;
+static
+#else
+/* We cannot use the normal constructor mechanism to call
+   __gmon_start__ because gcrt1.o appears before crtbegin.o in the link.
+   Instead crti.o calls it specially.  */
+extern void __gmon_start__ (void);
+#endif
+
+void
+__gmon_start__ (void)
+{
+  /* Protect from being called more than once.  Since crti.o is linked
+     into every shared library, each of their init functions will call us.  */
+  static int called;
+
+  if (called)
+    return;
+
+  called = 1;
+
+  /* Start keeping profiling records.  */
+  __monstartup ((u_long) TEXT_START, (u_long) &etext);
+
+  /* Call _mcleanup before exiting; it will write out gmon.out from the
+     collected data.  */
+  atexit (&_mcleanup);
+}