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, 117 insertions, 0 deletions

diff --git a/bsps/arm/atsam/include/libchip/include/pio_it.h b/bsps/arm/atsam/include/libchip/include/pio_it.h
new file mode 100644
index 0000000000..b03973caa1
--- /dev/null
+++ b/bsps/arm/atsam/include/libchip/include/pio_it.h
@@ -0,0 +1,117 @@
+/* ---------------------------------------------------------------------------- */
+/*                  Atmel Microcontroller Software Support                      */
+/*                       SAM Software Package License                           */
+/* ---------------------------------------------------------------------------- */
+/* Copyright (c) 2015, Atmel Corporation                                        */
+/*                                                                              */
+/* All rights reserved.                                                         */
+/*                                                                              */
+/* Redistribution and use in source and binary forms, with or without           */
+/* modification, are permitted provided that the following condition is met:    */
+/*                                                                              */
+/* - Redistributions of source code must retain the above copyright notice,     */
+/* this list of conditions and the disclaimer below.                            */
+/*                                                                              */
+/* Atmel's name may not be used to endorse or promote products derived from     */
+/* this software without specific prior written permission.                     */
+/*                                                                              */
+/* DISCLAIMER:  THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR   */
+/* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE   */
+/* DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT,      */
+/* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT */
+/* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,  */
+/* OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF    */
+/* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING         */
+/* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, */
+/* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.                           */
+/* ---------------------------------------------------------------------------- */
+
+/**
+ *  \file
+ *
+ *  \par Purpose
+ *
+ *  Configuration and handling of interrupts on PIO status changes. The API
+ *  provided here have several advantages over the traditional PIO interrupt
+ *  configuration approach:
+ *     - It is highly portable
+ *     - It automatically demultiplexes interrupts when multiples pins have been
+ *       configured on a single PIO controller
+ *     - It allows a group of pins to share the same interrupt
+ *
+ *  However, it also has several minor drawbacks that may prevent from using it
+ *  in particular applications:
+ *     - It enables the clocks of all PIO controllers
+ *     - PIO controllers all share the same interrupt handler, which does the
+ *       demultiplexing and can be slower than direct configuration
+ *     - It reserves space for a fixed number of interrupts, which can be
+ *       increased by modifying the appropriate constant in pio_it.c.
+ *
+ *  \par Usage
+ *
+ *  -# Initialize the PIO interrupt mechanism using PIO_InitializeInterrupts()
+ *     with the desired priority (0 ... 7).
+ *  -# Configure a status change interrupt on one or more pin(s) with
+ *     PIO_ConfigureIt().
+ *  -# Enable & disable interrupts on pins using PIO_EnableIt() and
+ *     PIO_DisableIt().
+ */
+
+#ifndef _PIO_IT_
+#define _PIO_IT_
+
+/*
+ *         Headers
+ */
+
+#include "pio.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*
+ *         Global functions
+ */
+
+extern void PIO_InitializeInterrupts(uint32_t dwPriority);
+
+extern void PIO_ConfigureIt(const Pin *pPin,
+    void (*handler)(const Pin *, void *arg), void *arg);
+
+
+/**
+ * Enables the given interrupt source if it has been configured. The status
+ * register of the corresponding PIO controller is cleared prior to enabling
+ * the interrupt.
+ * \param pPin  Interrupt source to enable.
+ */
+static inline void PIO_EnableIt(const Pin *pPin)
+{
+	pPin->pio->PIO_ISR;
+	pPin->pio->PIO_IER = pPin->mask;
+}
+
+/**
+ * Disables a given interrupt source, with no added side effects.
+ *
+ * \param pPin  Interrupt source to disable.
+ */
+static inline void PIO_DisableIt(const Pin *pPin)
+{
+	pPin->pio->PIO_IDR = pPin->mask;
+}
+
+extern void PIO_IT_InterruptHandler(void);
+
+extern void PioInterruptHandler(uint32_t id, Pio *pPio);
+
+extern void PIO_CaptureHandler(void);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* #ifndef _PIO_IT_ */
+