source: rtems/configure.ac @ 2afb22b

Last change on this file since 2afb22b was 2afb22b, checked in by Chris Johns <chrisj@…>, on Dec 23, 2017 at 7:18:56 AM

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: 1.4 KB
Line 
1## Process this file with autoconf to produce a configure script.
2
3AC_PREREQ([2.69])
4AC_INIT([rtems],[_RTEMS_VERSION],[https://devel.rtems.org/newticket])
5AC_CONFIG_SRCDIR([c])
6RTEMS_TOP([.])
7RTEMS_SOURCE_TOP
8RTEMS_BUILD_TOP
9
10# Abort if trying to build inside of the source tree.
11AS_IF([test -f aclocal/version.m4],[
12  rm -f config.cache config.log confdefs.h
13  AC_MSG_ERROR([***]
14    [Attempt to build inside of the source tree]
15    [Please use a separate build directory, instead] )
16])
17
18AC_CANONICAL_TARGET([])
19AM_INIT_AUTOMAKE([no-define foreign dist-bzip2 no-dist-gzip 1.12.2])
20AM_MAINTAINER_MODE
21
22## These option are only in here to let --help report all supported
23## options.
24RTEMS_ENABLE_MULTIPROCESSING
25RTEMS_ENABLE_POSIX
26RTEMS_ENABLE_NETWORKING
27RTEMS_ENABLE_CXX
28RTEMS_ENABLE_TESTS 
29RTEMS_ENABLE_RTEMS_DEBUG
30RTEMS_ENABLE_RTEMSBSP
31RTEMS_ENABLE_PARAVIRT
32RTEMS_ENABLE_DRVMGR
33
34## NOTES:
35## * tools/build are host-native tools to be installed on the host.
36## * tools/cpu are host-native or host-cross-target-tools
37
38RTEMS_BUILD_CONFIG_SUBDIRS([tools/build])
39RTEMS_BUILD_CONFIG_SUBDIRS([tools/cpu])
40
41case $enable_tests in
42yes | samples )
43  RTEMS_BUILD_CONFIG_SUBDIRS([testsuites/tools])
44  ;;
45esac
46
47# Some BSPs carelessly apply these tools as build-tools
48AS_IF([test $host != $build],[
49RTEMS_HOST_CONFIG_SUBDIRS([tools/build])
50])
51
52RTEMS_TARGET_CONFIG_SUBDIRS([c])
53
54AC_CONFIG_FILES([Makefile])
55
56AC_OUTPUT
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