source: rtems/cpukit/include/rtems/rtems-fdt-shell.h @ 963c6c2

5
Last change on this file since 963c6c2 was 2afb22b, checked in by Chris Johns <chrisj@…>, on 12/23/17 at 07:18:56

Remove make preinstall

A speciality of the RTEMS build system was the make preinstall step. It
copied header files from arbitrary locations into the build tree. The
header files were included via the -Bsome/build/tree/path GCC command
line option.

This has at least seven problems:

  • The make preinstall step itself needs time and disk space.
  • Errors in header files show up in the build tree copy. This makes it hard for editors to open the right file to fix the error.
  • There is no clear relationship between source and build tree header files. This makes an audit of the build process difficult.
  • The visibility of all header files in the build tree makes it difficult to enforce API barriers. For example it is discouraged to use BSP-specifics in the cpukit.
  • An introduction of a new build system is difficult.
  • Include paths specified by the -B option are system headers. This may suppress warnings.
  • The parallel build had sporadic failures on some hosts.

This patch removes the make preinstall step. All installed header
files are moved to dedicated include directories in the source tree.
Let @RTEMS_CPU@ be the target architecture, e.g. arm, powerpc, sparc,
etc. Let @RTEMS_BSP_FAMILIY@ be a BSP family base directory, e.g.
erc32, imx, qoriq, etc.

The new cpukit include directories are:

  • cpukit/include
  • cpukit/score/cpu/@RTEMS_CPU@/include
  • cpukit/libnetworking

The new BSP include directories are:

  • bsps/include
  • bsps/@RTEMS_CPU@/include
  • bsps/@RTEMS_CPU@/@RTEMS_BSP_FAMILIY@/include

There are build tree include directories for generated files.

The include directory order favours the most general header file, e.g.
it is not possible to override general header files via the include path
order.

The "bootstrap -p" option was removed. The new "bootstrap -H" option
should be used to regenerate the "headers.am" files.

Update #3254.

  • Property mode set to 100644
File size: 917 bytes
Line 
1/*
2 *  COPYRIGHT (c) 2013-2017 Chris Johns <chrisj@rtems.org>
3 *
4 *  The license and distribution terms for this file may be
5 *  found in the file LICENSE in this distribution or at
6 *  http://www.rtems.org/license/LICENSE.
7 */
8/**
9 * @file
10 *
11 * @ingroup rtems_fdt
12 *
13 * @brief RTEMS Flattened Device Tree Shell Command
14 *
15 * Support for loading, managing and accessing FDT blobs in RTEMS.
16 */
17
18#if !defined (_RTEMS_FDT_SHELL_H_)
19#define _RTEMS_FDT_SHELL_H_
20
21#include <rtems/rtems-fdt.h>
22
23#ifdef __cplusplus
24extern "C" {
25#endif /* __cplusplus */
26
27/**
28 * Add a shell command to access memory and registers associated with the DTF.
29 */
30void rtems_fdt_add_shell_command (void);
31
32/**
33 * Get a pointer to the handle. You can use this to load files or register
34 * blobs and have the shell command access them.
35 */
36rtems_fdt_handle* rtems_fdt_get_shell_handle (void);
37
38#ifdef __cplusplus
39}
40#endif /* __cplusplus */
41
42#endif
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