source: rtems/c/src/lib/libbsp/powerpc/virtex5/configure.ac @ 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: 1.6 KB
Line 
1dnl Process this file with autoconf to produce a configure script.
2
3AC_PREREQ([2.69])
4AC_INIT([rtems-c-src-lib-libbsp-powerpc-virtex5],[_RTEMS_VERSION],[https://devel.rtems.org/newticket])
5AC_CONFIG_SRCDIR([make/custom/virtex5.cfg])
6RTEMS_TOP(../../../../../..)
7RTEMS_SOURCE_TOP
8RTEMS_BUILD_TOP
9RTEMS_BSP_LINKCMDS
10
11RTEMS_CANONICAL_TARGET_CPU
12AM_INIT_AUTOMAKE([no-define nostdinc foreign 1.12.2])
13RTEMS_BSP_CONFIGURE
14
15RTEMS_PROG_CC_FOR_TARGET
16RTEMS_CANONICALIZE_TOOLS
17RTEMS_PROG_CCAS
18
19RTEMS_CHECK_NETWORKING
20AM_CONDITIONAL(HAS_NETWORKING,test "$HAS_NETWORKING" = "yes")
21
22RTEMS_BSPOPTS_SET([PPC_USE_DATA_CACHE],[*],[1])
23RTEMS_BSPOPTS_HELP([PPC_USE_DATA_CACHE],
24[If defined, then the PowerPC specific code in RTEMS will use
25 data cache instructions to optimize the context switch code.
26 This code can conflict with debuggers or emulators.  It is known
27 to break the Corelis PowerPC emulator with at least some combinations
28 of PowerPC 603e revisions and emulator versions.
29 The BSP actually contains the call that enables this.])
30
31RTEMS_BSPOPTS_SET([PPC_USE_SPRG],[*],[1])
32RTEMS_BSPOPTS_HELP([PPC_USE_SPRG],
33[If defined, then the PowerPC specific code in RTEMS will use some
34 of the special purpose registers to slightly optimize interrupt
35 response time.  The use of these registers can conflict with
36 other tools like debuggers.])
37
38RTEMS_BSPOPTS_SET([PPC_VECTOR_FILE_BASE],[*],[0x0100])
39RTEMS_BSPOPTS_HELP([PPC_VECTOR_FILE_BASE],
40[This defines the base address of the exception table.])
41
42RTEMS_BSP_CLEANUP_OPTIONS
43
44# Explicitly list all Makefiles here
45AC_CONFIG_FILES([Makefile])
46
47RTEMS_PPC_EXCEPTIONS
48
49AC_OUTPUT
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