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Remove make preinstall

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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.
This commit is contained in:
Chris Johns
2017-12-23 18:18:56 +11:00
committed by Sebastian Huber
parent 9704efb4ec
commit 2afb22b7e1
2356 changed files with 4032 additions and 19788 deletions
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8
cpukit/configure.ac
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@@ -4,13 +4,14 @@ AC_PREREQ([2.69])
AC_INIT([rtems-cpukit],[_RTEMS_VERSION],[https://devel.rtems.org/newticket])
AC_CONFIG_SRCDIR([score])
RTEMS_TOP([..],[])
RTEMS_SOURCE_TOP
RTEMS_BUILD_TOP
RTEMS_CANONICAL_TARGET_CPU
AM_INIT_AUTOMAKE([no-define nostdinc subdir-objects foreign 1.12.2])
AM_MAINTAINER_MODE
RTEMS_ENABLE_MULTILIB
RTEMS_ENABLE_MULTIPROCESSING
RTEMS_ENABLE_POSIX
RTEMS_ENABLE_RTEMS_DEBUG
@@ -489,9 +490,4 @@ pppd/Makefile
mghttpd/Makefile
wrapup/Makefile])
AC_CONFIG_COMMANDS([preinstall-stamp],
[test -z "$with_multisubdir" && ${MAKE} preinstall-stamp],
[MAKE=${MAKE}
with_multisubdir="$with_multisubdir"])
AC_OUTPUT