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, 68 insertions, 0 deletions

diff --git a/bsps/bfin/include/libcpu/twi.h b/bsps/bfin/include/libcpu/twi.h
new file mode 100644
index 0000000000..2392ba532b
--- /dev/null
+++ b/bsps/bfin/include/libcpu/twi.h
@@ -0,0 +1,68 @@
+/* not yet implemented */
+
+/*
+ *  RTEMS driver for Blackfin TWI (I2C)
+ *
+ *  COPYRIGHT (c) 2008 Kallisti Labs, Los Gatos, CA, USA
+ *            written by Allan Hessenflow <allanh@kallisti.com>
+ *
+ *  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 _twi_h_
+#define _twi_h_
+
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+typedef struct {
+  uint32_t sclk;
+  void *base;
+  bool fast;
+  int8_t slave_address;
+} bfin_twi_config_t;
+
+typedef struct bfin_twi_request_s {
+  bool write;
+  int count;
+  void *data;
+  /* Chained requests are done with repeated start conditions in between.
+     These are useful for atomic address write/data read transactions
+     (which can be important in multi-master configurations), and for
+     doing 10-bit addressing. */
+  struct bfin_twi_request_s *next;
+} bfin_twi_request_t;
+
+typedef rtems_status_code (*bfin_twi_callback_t)(int channel,
+                                                 void *arg,
+                                                 bool general_call,
+                                                 bool write,
+                                                 bool done,
+                                                 int read_count,
+                                                 uint8_t *data);
+
+
+rtems_status_code bfin_twi_init(int channel, bfin_twi_config_t *config);
+
+rtems_status_code bfin_twi_register_callback(int channel,
+                                             bfin_twi_callback_t callback,
+                                             void *arg);
+
+void bfin_twi_isr(int source);
+
+rtems_status_code bfin_twi_request(int channel, uint8_t address,
+                                   bfin_twi_request_t *request,
+                                   rtems_interval timeout);
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _twi_h_ */
+