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.

1 files changed, 129 insertions, 0 deletions

diff --git a/cpukit/include/rtems/linkersets.h b/cpukit/include/rtems/linkersets.h
new file mode 100644
index 0000000000..bad046999c
--- /dev/null
+++ b/cpukit/include/rtems/linkersets.h
@@ -0,0 +1,129 @@
+/*
+ * Copyright (c) 2015, 2016 embedded brains GmbH.  All rights reserved.
+ *
+ *  embedded brains GmbH
+ *  Dornierstr. 4
+ *  82178 Puchheim
+ *  Germany
+ *  <rtems@embedded-brains.de>
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rtems.org/license/LICENSE.
+ */
+
+#ifndef _RTEMS_LINKERSET_H
+#define _RTEMS_LINKERSET_H
+
+#include <rtems/score/basedefs.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+#define RTEMS_LINKER_SET_BEGIN( set ) \
+  _Linker_set_##set##_begin
+
+#define RTEMS_LINKER_SET_END( set ) \
+  _Linker_set_##set##_end
+
+#define RTEMS_LINKER_ROSET_DECLARE( set, type ) \
+  extern type const RTEMS_LINKER_SET_BEGIN( set )[0]; \
+  extern type const RTEMS_LINKER_SET_END( set )[0]
+
+#define RTEMS_LINKER_ROSET( set, type ) \
+  type const RTEMS_LINKER_SET_BEGIN( set )[0] \
+  RTEMS_SECTION( ".rtemsroset." #set ".begin" ) RTEMS_USED; \
+  type const RTEMS_LINKER_SET_END( set )[0] \
+  RTEMS_SECTION( ".rtemsroset." #set ".end" ) RTEMS_USED
+
+#define RTEMS_LINKER_ROSET_ITEM_DECLARE( set, type, item ) \
+  extern type const _Linker_set_##set##_##item
+
+#define RTEMS_LINKER_ROSET_ITEM_REFERENCE( set, type, item ) \
+  static type const * const _Set_reference_##set##_##item \
+  RTEMS_SECTION( ".rtemsroset.reference" ) RTEMS_USED = \
+  &_Linker_set_##set##_##item
+
+#define RTEMS_LINKER_ROSET_ITEM_ORDERED( set, type, item, order ) \
+  type const _Linker_set_##set##_##item \
+  RTEMS_SECTION( ".rtemsroset." #set ".content.0." RTEMS_XSTRING( order ) ) \
+  RTEMS_USED
+
+#define RTEMS_LINKER_ROSET_ITEM( set, type, item ) \
+  type const _Linker_set_##set##_##item \
+  RTEMS_SECTION( ".rtemsroset." #set ".content.1" ) RTEMS_USED
+
+#define RTEMS_LINKER_ROSET_CONTENT( set, decl ) \
+  decl \
+  RTEMS_SECTION( ".rtemsroset." #set ".content" )
+
+#define RTEMS_LINKER_RWSET_DECLARE( set, type ) \
+  extern type RTEMS_LINKER_SET_BEGIN( set )[0]; \
+  extern type RTEMS_LINKER_SET_END( set )[0]
+
+#define RTEMS_LINKER_RWSET( set, type ) \
+  type RTEMS_LINKER_SET_BEGIN( set )[0] \
+  RTEMS_SECTION( ".rtemsrwset." #set ".begin" ) RTEMS_USED; \
+  type RTEMS_LINKER_SET_END( set )[0] \
+  RTEMS_SECTION( ".rtemsrwset." #set ".end" ) RTEMS_USED
+
+#define RTEMS_LINKER_RWSET_ITEM_DECLARE( set, type, item ) \
+  extern type _Linker_set_##set##_##item
+
+/*
+ * The .rtemsroset is here not a typo.  We must ensure that the references are
+ * not a victim of the garbage collection of the linker.  Thus, we place them
+ * in a dedicated area of the RTEMS read-only linker set section.
+ */
+#define RTEMS_LINKER_RWSET_ITEM_REFERENCE( set, type, item ) \
+  static type * const _Set_reference_##set##_##item \
+  RTEMS_SECTION( ".rtemsroset.reference" ) RTEMS_USED = \
+  &_Linker_set_##set##_##item
+
+#define RTEMS_LINKER_RWSET_ITEM_ORDERED( set, type, item, order ) \
+  type _Linker_set_##set##_##item \
+  RTEMS_SECTION( ".rtemsrwset." #set ".content.0." RTEMS_XSTRING( order ) ) \
+  RTEMS_USED
+
+#define RTEMS_LINKER_RWSET_ITEM( set, type, item ) \
+  type _Linker_set_##set##_##item \
+  RTEMS_SECTION( ".rtemsrwset." #set ".content.1" ) RTEMS_USED
+
+#define RTEMS_LINKER_RWSET_CONTENT( set, decl ) \
+  decl \
+  RTEMS_SECTION( ".rtemsrwset." #set ".content" )
+
+RTEMS_INLINE_ROUTINE uintptr_t _Linker_set_Obfuscate( const void *ptr )
+{
+  uintptr_t addr;
+
+  addr = (uintptr_t) ptr;
+  RTEMS_OBFUSCATE_VARIABLE( addr );
+
+  return addr;
+}
+
+#define RTEMS_LINKER_SET_SIZE( set ) \
+  ( _Linker_set_Obfuscate( RTEMS_LINKER_SET_END( set ) ) \
+    - _Linker_set_Obfuscate( RTEMS_LINKER_SET_BEGIN( set ) ) )
+
+#define RTEMS_LINKER_SET_ITEM_COUNT( set ) \
+  ( RTEMS_LINKER_SET_SIZE( set ) \
+    / sizeof( RTEMS_LINKER_SET_BEGIN( set )[ 0 ] ) )
+
+#define RTEMS_LINKER_SET_IS_EMPTY( set ) \
+  ( RTEMS_LINKER_SET_SIZE( set ) == 0 )
+
+#define RTEMS_LINKER_SET_FOREACH( set, item ) \
+  for ( \
+    item = (void *) _Linker_set_Obfuscate( RTEMS_LINKER_SET_BEGIN( set ) ) ; \
+    item != RTEMS_LINKER_SET_END( set ) ; \
+    ++item \
+  )
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif /* _RTEMS_LINKERSET_H */