build: rename all symbols to use sysprof_ as prefix

As we gain in usage, we need to be more careful about using a prefix
that will not collide with other symbols. So version 3 of our ABI will
change to using Sysprof/SYSPROF/sysprof as the various prefixes.

The soname/api version bump will happen later on this branch so that
things are easier to test up until then.

src/libsysprof-capture/sysprof-capture-util-private.h

@@ -0,0 +1,57 @@
+/* sysprof-capture-util-private.h
+ *
+ * Copyright 2019 Christian Hergert <chergert@redhat.com>
+ *
+ * This file 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 of the License, or (at your option)
+ * any later version.
+ *
+ * This file 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 General Public License along
+ * with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+#pragma once
+
+#include <glib.h>
+
+#ifdef __linux__
+# include <sys/sendfile.h>
+#endif
+
+#include <unistd.h>
+
+#ifdef __linux__
+# define _sysprof_getpagesize()     getpagesize()
+# define _sysprof_pread(a,b,c,d)    pread(a,b,c,d)
+# define _sysprof_pwrite(a,b,c,d)   pwrite(a,b,c,d)
+# define _sysprof_write(a,b,c)      write(a,b,c)
+# define _sysprof_getpid()          getpid()
+# define _sysprof_sendfile(a,b,c,d) sendfile(a,b,c,d)
+#else
+size_t  _sysprof_getpagesize (void);
+ssize_t _sysprof_pread       (int     fd,
+                         void   *buf,
+                         size_t  count,
+                         off_t   offset);
+ssize_t _sysprof_pwrite      (int         fd,
+                         const void *buf,
+                         size_t      count,
+                         off_t       offset);
+ssize_t _sysprof_write       (int         fd,
+                         const void *buf,
+                         size_t      count);
+gint32  _sysprof_getpid      (void);
+ssize_t _sysprof_sendfile    (int     out_fd,
+                         int     in_fd,
+                         off_t  *offset,
+                         size_t  count);
+
+#endif