source: rtems/c/src/lib/libcpu/lm32/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: 810 bytes
RevLine 
[74c6f36]1## Process this file with autoconf to produce a configure script.
2
[0f77281]3AC_PREREQ([2.69])
[12072880]4AC_INIT([rtems-c-src-lib-libcpu-lm32],[_RTEMS_VERSION],[https://devel.rtems.org/newticket])
[74c6f36]5RTEMS_TOP([../../../../..],[../../..])
[2afb22b]6RTEMS_SOURCE_TOP
7RTEMS_BUILD_TOP
[74c6f36]8
9RTEMS_CANONICAL_TARGET_CPU
10
[bb2b825]11AM_INIT_AUTOMAKE([no-define foreign subdir-objects 1.12.2])
[74c6f36]12AM_MAINTAINER_MODE
13
14RTEMS_ENV_RTEMSBSP
15
16RTEMS_PROJECT_ROOT
17
18RTEMS_PROG_CC_FOR_TARGET
19AM_PROG_CC_C_O
20RTEMS_CANONICALIZE_TOOLS
21RTEMS_PROG_CCAS
22
23# At this time all models should use the shared directory so do this
24AM_CONDITIONAL(shared, true)
25
26AC_PATH_PROG([AMPOLISH3],[ampolish3],[])
27AM_CONDITIONAL([AMPOLISH3],[test x"$USE_MAINTAINER_MODE" = x"yes" \
28  && test -n "$AMPOLISH3"])
29
30RTEMS_AMPOLISH3
31
32# Explicitly list all Makefiles here
33AC_CONFIG_FILES([Makefile
34])
35AC_OUTPUT
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