source: rtems/cpukit/score/cpu/i386/include/machine/elf_machdep.h @ 7c39cab

5
Last change on this file since 7c39cab 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: 1.5 KB
Line 
1/*      $NetBSD: elf_machdep.h,v 1.10 2009/05/30 05:56:52 skrll Exp $   */
2
3#define ELF32_MACHDEP_ENDIANNESS        ELFDATA2LSB
4#define ELF32_MACHDEP_ID_CASES                                          \
5                case EM_386:                                            \
6                case EM_486:                                            \
7                        break;
8
9#define ELF64_MACHDEP_ENDIANNESS        XXX     /* break compilation */
10#define ELF64_MACHDEP_ID_CASES                                          \
11                /* no 64-bit ELF machine types supported */
12
13#define ELF32_MACHDEP_ID                EM_386
14
15#define ARCH_ELFSIZE            32      /* MD native binary size */
16
17/* i386 relocations */
18#define R_386_NONE      0
19#define R_386_32        1
20#define R_386_PC32      2
21#define R_386_GOT32     3
22#define R_386_PLT32     4
23#define R_386_COPY      5
24#define R_386_GLOB_DAT  6
25#define R_386_JMP_SLOT  7
26#define R_386_RELATIVE  8
27#define R_386_GOTOFF    9
28#define R_386_GOTPC     10
29
30/* TLS relocations */
31#define R_386_TLS_TPOFF 14
32#define R_386_TLS_IE    15
33#define R_386_TLS_GOTIE 16
34#define R_386_TLS_LE    17
35#define R_386_TLS_GD    18
36#define R_386_TLS_LDM   19
37
38/* The following relocations are GNU extensions. */
39#define R_386_16        20
40#define R_386_PC16      21
41#define R_386_8         22
42#define R_386_PC8       23
43
44/* More TLS relocations */
45#define R_386_TLS_GD_32         24
46#define R_386_TLS_GD_PUSH       25
47#define R_386_TLS_GD_CALL       26
48#define R_386_TLS_GD_POP        27
49#define R_386_TLS_LDM_32        28
50#define R_386_TLS_LDM_PUSH      29
51#define R_386_TLS_LDM_CALL      30
52#define R_386_TLS_LDM_POP       31
53#define R_386_TLS_LDO_32        32
54#define R_386_TLS_IE_32         33
55#define R_386_TLS_LE_32         34
56#define R_386_TLS_DTPMOD32      35
57#define R_386_TLS_DTPOFF32      36
58#define R_386_TLS_TPOFF32       37
59#define R_386_TLS_GOTDESC       39
60#define R_386_TLS_DESC_CALL     40
61#define R_386_TLS_DESC          41
62
63#define R_TYPE(name)    __CONCAT(R_386_,name)
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