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, 78 insertions, 0 deletions

diff --git a/cpukit/include/rtems/rtems/smp.h b/cpukit/include/rtems/rtems/smp.h
new file mode 100644
index 0000000000..aeb0df6f46
--- /dev/null
+++ b/cpukit/include/rtems/rtems/smp.h
@@ -0,0 +1,78 @@
+/**
+ * @file
+ *
+ * @ingroup ClassicSMP
+ *
+ * @brief SMP Services API
+ */
+
+/*
+ * COPYRIGHT (c) 1989-2011.
+ * On-Line Applications Research Corporation (OAR).
+ *
+ * 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_RTEMS_SMP_H
+#define _RTEMS_RTEMS_SMP_H
+
+#include <stdint.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @defgroup ClassicSMP SMP Services
+ *
+ * @ingroup ClassicRTEMS
+ *
+ * This encapsulates functionality which is useful for SMP applications.
+ *
+ * @{
+ */
+
+/**
+ * @brief Returns the count of processors in the system.
+ *
+ * On uni-processor configurations a value of one will be returned.
+ *
+ * On SMP configurations this returns the value of a global variable set during
+ * system initialization to indicate the count of utilized processors.  The
+ * processor count depends on the physically or virtually available processors
+ * and application configuration.  The value will always be less than or equal
+ * to the maximum count of application configured processors.
+ *
+ * @return The count of processors being utilized.
+ */
+uint32_t rtems_get_processor_count(void);
+
+/**
+ * @brief Returns the index of the current processor.
+ *
+ * On uni-processor configurations a value of zero will be returned.
+ *
+ * On SMP configurations an architecture specific method is used to obtain the
+ * index of the current processor in the system.  The set of processor indices
+ * is the range of integers starting with zero up to the processor count minus
+ * one.
+ *
+ * Outside of sections with disabled thread dispatching the current processor
+ * index may change after every instruction since the thread may migrate from
+ * one processor to another.  Sections with disabled interrupts are sections
+ * with thread dispatching disabled.
+ *
+ * @return The index of the current processor.
+ */
+uint32_t rtems_get_current_processor(void);
+
+/** @} */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
+/* end of include file */