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, 74 insertions, 0 deletions

diff --git a/bsps/arm/atsam/include/bsp/atsam-i2c.h b/bsps/arm/atsam/include/bsp/atsam-i2c.h
new file mode 100644
index 0000000000..7425db9f7b
--- /dev/null
+++ b/bsps/arm/atsam/include/bsp/atsam-i2c.h
@@ -0,0 +1,74 @@
+/*
+ * Copyright (c) 2016 embedded brains GmbH.  All rights reserved.
+ *
+ *  embedded brains GmbH
+ *  Dornierstr. 4
+ *  82178 Puchheim
+ *  Germany
+ *  <info@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 LIBBSP_ARM_ATSAM_ATSAM_I2C_H
+#define LIBBSP_ARM_ATSAM_ATSAM_I2C_H
+
+#include <libchip/chip.h>
+#include <libchip/include/pio.h>
+
+#include <bsp.h>
+#include <dev/i2c/i2c.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+#define TWI_AMOUNT_PINS 2
+
+typedef enum {
+	TX_SEND_DATA,
+	TX_SEND_STOP,
+	TX_CONT_MESSAGE_NEEDED,
+	RX_SEND_DATA,
+	RX_SEND_STOP,
+	RX_CONT_MESSAGE_NEEDED,
+	TX_RX_STOP_SENT
+}transfer_state;
+
+typedef struct {
+	uint8_t status;
+	uint8_t *data;
+	bool stop_request;
+	uint32_t data_size;
+	uint32_t already_transferred;
+	transfer_state trans_state;
+} transfer_desc;
+
+typedef struct {
+	i2c_bus base;
+	i2c_msg *msgs;
+	Twihs *regs;
+	transfer_desc trans_desc;
+	uint32_t msg_todo;
+	uint32_t current_msg_todo;
+	uint8_t *current_msg_byte;
+	uint32_t input_clock;
+	bool read;
+	rtems_id task_id;
+	rtems_vector_number irq;
+} atsam_i2c_bus;
+
+int i2c_bus_register_atsam(
+    const char *bus_path,
+    Twihs *register_base,
+    rtems_vector_number irq,
+    const Pin pins[TWI_AMOUNT_PINS]
+);
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif /* LIBBSP_ARM_ATSAM_ATSAM_I2C_H */