source: rtems/cpukit/score/cpu/v850/include/rtems/asm.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: 3.6 KB
Line 
1/**
2 * @file
3 *
4 * @brief Address the Problems Caused by Incompatible Flavor of
5 * Assemblers and Toolsets
6 *
7 * This include file attempts to address the problems
8 * caused by incompatible flavors of assemblers and
9 * toolsets.  It primarily addresses variations in the
10 * use of leading underscores on symbols and the requirement
11 * that register names be preceded by a %.
12 *
13 * @note The spacing in the use of these macros
14 *       is critical to them working as advertised.
15 */
16
17/*
18 *  COPYRIGHT:
19 *
20 *  This file is based on similar code found in newlib available
21 *  from ftp.cygnus.com.  The file which was used had no copyright
22 *  notice.  This file is freely distributable as long as the source
23 *  of the file is noted.  This file is:
24 *
25 *  COPYRIGHT (c) 1994-2012.
26 *  On-Line Applications Research Corporation (OAR).
27 */
28
29#ifndef _RTEMS_ASM_H
30#define _RTEMS_ASM_H
31
32/*
33 *  Indicate we are in an assembly file and get the basic CPU definitions.
34 */
35
36#ifndef ASM
37#define ASM
38#endif
39#include <rtems/score/cpuopts.h>
40#include <rtems/score/no_cpu.h>
41
42#ifndef __USER_LABEL_PREFIX__
43/**
44 * Recent versions of GNU cpp define variables which indicate the
45 * need for underscores and percents.  If not using GNU cpp or
46 * the version does not support this, then you will obviously
47 * have to define these as appropriate.
48 *
49 * This symbol is prefixed to all C program symbols.
50 */
51#define __USER_LABEL_PREFIX__ _
52#endif
53
54#ifndef __REGISTER_PREFIX__
55/**
56 * Recent versions of GNU cpp define variables which indicate the
57 * need for underscores and percents.  If not using GNU cpp or
58 * the version does not support this, then you will obviously
59 * have to define these as appropriate.
60 *
61 * This symbol is prefixed to all register names.
62 */
63#define __REGISTER_PREFIX__
64#endif
65
66#include <rtems/concat.h>
67
68/** Use the right prefix for global labels.  */
69#define SYM(x) CONCAT1 (__USER_LABEL_PREFIX__, x)
70
71/** Use the right prefix for registers.  */
72#define REG(x) CONCAT1 (__REGISTER_PREFIX__, x)
73
74/*
75 *  define macros for all of the registers on this CPU
76 *
77 *  EXAMPLE:     #define d0 REG (d0)
78 */
79
80/*
81 *  Define macros to handle section beginning and ends.
82 */
83
84
85/** This macro is used to denote the beginning of a code declaration. */
86#define BEGIN_CODE_DCL .text
87/** This macro is used to denote the end of a code declaration. */
88#define END_CODE_DCL
89/** This macro is used to denote the beginning of a data declaration section. */
90#define BEGIN_DATA_DCL .data
91/** This macro is used to denote the end of a data declaration section. */
92#define END_DATA_DCL
93/** This macro is used to denote the beginning of a code section. */
94#define BEGIN_CODE .text
95/** This macro is used to denote the end of a code section. */
96#define END_CODE
97/** This macro is used to denote the beginning of a data section. */
98#define BEGIN_DATA
99/** This macro is used to denote the end of a data section. */
100#define END_DATA
101/**
102 * This macro is used to denote the beginning of the
103 * unitialized data section.
104 */
105#define BEGIN_BSS
106/** This macro is used to denote the end of the unitialized data section.  */
107#define END_BSS
108/** This macro is used to denote the end of the assembly file.  */
109#define END
110
111/**
112 * This macro is used to declare a public global symbol.
113 *
114 * @note This must be tailored for a particular flavor of the C compiler.
115 * They may need to put underscores in front of the symbols.
116 */
117#define PUBLIC(sym) .globl SYM (sym)
118
119/**
120 * This macro is used to prototype a public global symbol.
121 *
122 * @note This must be tailored for a particular flavor of the C compiler.
123 * They may need to put underscores in front of the symbols.
124 */
125#define EXTERN(sym) .globl SYM (sym)
126
127#endif
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