source: rtems/cpukit/include/rtems/score/smp.h @ 21275b58

Last change on this file since 21275b58 was 2afb22b, checked in by Chris Johns <chrisj@…>, on Dec 23, 2017 at 7:18:56 AM

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: 1.1 KB
Line 
1/**
2 * @file
3 *
4 * @ingroup ScoreSMP
5 *
6 * @brief SuperCore SMP Support API
7 */
8
9/*
10 *  COPYRIGHT (c) 1989-2011.
11 *  On-Line Applications Research Corporation (OAR).
12 *
13 *  The license and distribution terms for this file may be
14 *  found in the file LICENSE in this distribution or at
15 *  http://www.rtems.org/license/LICENSE.
16 */
17
18#ifndef _RTEMS_SCORE_SMP_H
19#define _RTEMS_SCORE_SMP_H
20
21#include <rtems/score/cpu.h>
22
23#ifdef __cplusplus
24extern "C" {
25#endif
26
27/**
28 * @defgroup ScoreSMP SMP Support
29 *
30 * @ingroup Score
31 *
32 * This defines the interface of the SuperCore SMP support.
33 *
34 * @{
35 */
36
37#if defined( RTEMS_SMP )
38  extern uint32_t _SMP_Processor_count;
39
40  static inline uint32_t _SMP_Get_processor_count( void )
41  {
42    return _SMP_Processor_count;
43  }
44#else
45  #define _SMP_Get_processor_count() UINT32_C(1)
46#endif
47
48#if defined( RTEMS_SMP )
49  static inline uint32_t _SMP_Get_current_processor( void )
50  {
51    return _CPU_SMP_Get_current_processor();
52  }
53#else
54  #define _SMP_Get_current_processor() UINT32_C(0)
55#endif
56
57/** @} */
58
59#ifdef __cplusplus
60}
61#endif
62
63#endif
64/* end of include file */
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