source: rtems/bsps/include/libchip/i2c-2b-eeprom.h @ 2afb22b

5
Last change on this file since 2afb22b 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: 2.5 KB
Line 
1#ifndef I2C_2B_EEPROM_DRIVER_H
2#define I2C_2B_EEPROM_DRIVER_H
3
4/* Trivial i2c driver for reading and writing "2-byte eeproms".
5 * On 'open' the file-pointer is reset to 0, subsequent
6 * read/write operations slurp/write data from there...
7 */
8
9/*
10 * Authorship
11 * ----------
12 * This software was created by
13 *     Till Straumann <strauman@slac.stanford.edu>, 2005,
14 *         Stanford Linear Accelerator Center, Stanford University.
15 *
16 * Acknowledgement of sponsorship
17 * ------------------------------
18 * This software was produced by
19 *     the Stanford Linear Accelerator Center, Stanford University,
20 *         under Contract DE-AC03-76SFO0515 with the Department of Energy.
21 *
22 * Government disclaimer of liability
23 * ----------------------------------
24 * Neither the United States nor the United States Department of Energy,
25 * nor any of their employees, makes any warranty, express or implied, or
26 * assumes any legal liability or responsibility for the accuracy,
27 * completeness, or usefulness of any data, apparatus, product, or process
28 * disclosed, or represents that its use would not infringe privately owned
29 * rights.
30 *
31 * Stanford disclaimer of liability
32 * --------------------------------
33 * Stanford University makes no representations or warranties, express or
34 * implied, nor assumes any liability for the use of this software.
35 *
36 * Stanford disclaimer of copyright
37 * --------------------------------
38 * Stanford University, owner of the copyright, hereby disclaims its
39 * copyright and all other rights in this software.  Hence, anyone may
40 * freely use it for any purpose without restriction.
41 *
42 * Maintenance of notices
43 * ----------------------
44 * In the interest of clarity regarding the origin and status of this
45 * SLAC software, this and all the preceding Stanford University notices
46 * are to remain affixed to any copy or derivative of this software made
47 * or distributed by the recipient and are to be affixed to any copy of
48 * software made or distributed by the recipient that contains a copy or
49 * derivative of this software.
50 *
51 * ------------------ SLAC Software Notices, Set 4 OTT.002a, 2004 FEB 03
52 */
53
54
55#include <rtems.h>
56#include <rtems/libi2c.h>
57
58#ifdef __cplusplus
59extern "C" {
60#endif
61
62/* pass one of these to rtems_libi2c_register_drv() */
63
64/* These ops provide no write access */
65extern rtems_libi2c_drv_t *i2c_2b_eeprom_ro_driver_descriptor;
66
67/* Use these for writing and reading */
68extern rtems_libi2c_drv_t *i2c_2b_eeprom_driver_descriptor;
69
70#ifdef __cplusplus
71}
72#endif
73
74#endif
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