source: rtems/cpukit/score/cpu/m68k/include/machine/elf_machdep.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: 1.1 KB
Line 
1/*      $NetBSD: elf_machdep.h,v 1.7 2002/01/28 21:34:48 thorpej Exp $  */
2
3#define ELF32_MACHDEP_ENDIANNESS        ELFDATA2MSB
4#define ELF32_MACHDEP_ID_CASES                                          \
5                case EM_68K:                                            \
6                        break;
7
8#define ELF64_MACHDEP_ENDIANNESS        XXX     /* break compilation */
9#define ELF64_MACHDEP_ID_CASES                                          \
10                /* no 64-bit ELF machine types supported */
11
12#define ELF32_MACHDEP_ID        EM_68K
13
14/*
15 * Machine-dependent ELF flags.  These are defined by the GNU tools.
16 */
17#define EF_CPU32        0x00810000
18#define EF_M68000       0x01000000
19
20#define ARCH_ELFSIZE            32      /* MD native binary size */
21
22/* m68k relocation types */
23#define R_68K_NONE      0
24#define R_68K_32        1
25#define R_68K_16        2
26#define R_68K_8         3
27#define R_68K_PC32      4
28#define R_68K_PC16      5
29#define R_68K_PC8       6
30#define R_68K_GOT32     7
31#define R_68K_GOT16     8
32#define R_68K_GOT8      9
33#define R_68K_GOT32O    10
34#define R_68K_GOT16O    11
35#define R_68K_GOT8O     12
36#define R_68K_PLT32     13
37#define R_68K_PLT16     14
38#define R_68K_PLT8      15
39#define R_68K_PLT32O    16
40#define R_68K_PLT16O    17
41#define R_68K_PLT8O     18
42#define R_68K_COPY      19
43#define R_68K_GLOB_DAT  20
44#define R_68K_JMP_SLOT  21
45#define R_68K_RELATIVE  22
46
47#define R_TYPE(name)    __CONCAT(R_68K_,name)
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