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, 82 insertions, 0 deletions

diff --git a/cpukit/score/cpu/no_cpu/include/rtems/score/cpuimpl.h b/cpukit/score/cpu/no_cpu/include/rtems/score/cpuimpl.h
new file mode 100644
index 0000000000..85214d7f6c
--- /dev/null
+++ b/cpukit/score/cpu/no_cpu/include/rtems/score/cpuimpl.h
@@ -0,0 +1,82 @@
+/**
+ * @file
+ *
+ * @brief CPU Port Implementation API
+ */
+
+/*
+ * Copyright (c) 2013, 2016 embedded brains GmbH
+ *
+ * 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_SCORE_CPUIMPL_H
+#define _RTEMS_SCORE_CPUIMPL_H
+
+#include <rtems/score/cpu.h>
+
+/**
+ * @brief The size of the CPU specific per-CPU control.
+ *
+ * This define must be visible to assember files since it is used to derive
+ * structure offsets.
+ */
+#define CPU_PER_CPU_CONTROL_SIZE 0
+
+#ifndef ASM
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @brief The CPU specific per-CPU control.
+ *
+ * The CPU port can place here all state information that must be available and
+ * maintained for each processor in the system.  This structure must contain at
+ * least one field for C/C++ compatibility.  In GNU C empty structures have a
+ * size of zero.  In C++ structures have a non-zero size.  In case
+ * CPU_PER_CPU_CONTROL_SIZE is defined to zero, then this structure is not
+ * used.
+ */
+typedef struct {
+  /* CPU specific per-CPU state */
+} CPU_Per_CPU_control;
+
+/**
+ * @brief Special register pointing to the per-CPU control of the current
+ * processor.
+ *
+ * This is optional.  Not every CPU port needs this.  It is only an optional
+ * optimization variant.
+ */
+register struct Per_CPU_Control *_CPU_Per_CPU_current asm( "rX" );
+
+/**
+ * @brief Optional method to obtain the per-CPU control of the current processor.
+ *
+ * This is optional.  Not every CPU port needs this.  It is only an optional
+ * optimization variant.  In case this macro is undefined, the default
+ * implementation using the current processor index will be used.
+ */
+#define _CPU_Get_current_per_CPU_control() ( _CPU_Per_CPU_current )
+
+/**
+ * @brief Optional method to get the executing thread.
+ *
+ * This is optional.  Not every CPU port needs this.  It is only an optional
+ * optimization variant.  In case this macro is undefined, the default
+ * implementation uses the per-CPU information and the current processor index
+ * to get the executing thread.
+ */
+#define _CPU_Get_thread_executing() ( _CPU_Per_CPU_current->executing )
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* ASM */
+
+#endif /* _RTEMS_SCORE_CPUIMPL_H */