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, 255 insertions, 0 deletions

diff --git a/cpukit/include/rtems/devfs.h b/cpukit/include/rtems/devfs.h
new file mode 100644
index 0000000000..b0a9197eca
--- /dev/null
+++ b/cpukit/include/rtems/devfs.h
@@ -0,0 +1,255 @@
+/**
+* @file 
+* 
+* @brief Device Only File System
+*  
+* This include file contains all constants and structures associated
+* with the 'device-only' filesystem.
+*/
+
+#ifndef _RTEMS_DEVFS_H
+#define _RTEMS_DEVFS_H
+
+#include <rtems/libio_.h>
+
+/**
+ * @defgroup DevFsDeviceTable Device Only File System
+ *
+ * @ingroup FileSystemTypesAndMount
+ *
+ * @brief This structure defines the type of device table
+ */
+/**@{*/
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ *  @brief Per Device Node Control Structure
+ *
+ *  This structure is instanced per device node and contains all information
+ *  used by this file system implementation to manage that device node.
+ */
+typedef struct {
+  /** This member points to device name which is not a null-terminated string */
+  const char               *name;
+  /** This member is the name length of a device */
+  size_t                    namelen;
+  /** major number of a device */
+  rtems_device_major_number major;
+  /** minor number of a device */
+  rtems_device_minor_number minor;
+  /** device creation mode, only device file can be created */
+  mode_t                    mode;
+} devFS_node;
+
+typedef struct {
+  devFS_node *nodes;
+  size_t      count;
+} devFS_data;
+
+/**
+ *  The following defines the device-only filesystem operating
+ *  operations.
+ */
+extern const rtems_filesystem_operations_table devFS_ops;
+
+/**
+ *  The following defines the device-only filesystem operating
+ *  handlers.
+ */
+extern const rtems_filesystem_file_handlers_r  devFS_file_handlers;
+
+/**
+ * @brief Obtain Immutable Pointer to Immutable File System Data
+ *
+ * This methods returns the immutable file system specific information
+ * associated with this file.
+ */
+static inline const devFS_data *devFS_get_data(
+  const rtems_filesystem_location_info_t *loc
+)
+{
+  return (const devFS_data *) loc->mt_entry->immutable_fs_info;
+}
+
+/**
+ *  @brief Evaluate Path
+ */
+extern void devFS_eval_path(
+  rtems_filesystem_eval_path_context_t *ctx
+);
+
+/**
+ *  @brief Maps Open Operation to rtems_io_open
+ *
+ *  This handler maps open operation to rtems_io_open.
+ *
+ *  @param iop This is the RTEMS's internal representation of file.
+ *  @param pathname a null-terminated string that starts with /dev.
+ *  @param oflag access flags
+ *  @param mode access mode
+ *
+ *  @retval the same as open
+ */
+extern int devFS_open(
+  rtems_libio_t *iop,
+  const char    *pathname,
+  int            oflag,
+  mode_t         mode
+);
+
+
+/**
+ *  @brief Maps Close Operation to rtems_io_close
+ *
+ *  This handler maps close operation to rtems_io_close.
+ *
+ *  @param iop This is the RTEMS's internal representation of file
+ *
+ *  @retval the same as close
+ */
+extern int devFS_close(
+  rtems_libio_t *iop
+);
+
+/**
+ *  @brief Maps Read Operation to rtems_io_read
+ *
+ *  This handler maps read operation to rtems_io_read.
+ *
+ *  @param iop This is the RTEMS's internal representation of file
+ *  @param  buffer memory location to store read data
+ *  @param  count  how many bytes to read
+ *
+ *  @retval On successful, this routine returns total bytes read. On error
+ *  it returns -1 and errno is set to proper value.
+ */
+extern ssize_t devFS_read(
+  rtems_libio_t *iop,
+  void          *buffer,
+  size_t         count
+);
+
+/**
+ *  @brief Writes Operation to rtems_io_write
+ *
+ *  This handler maps write operation to rtems_io_write.
+ *
+ *  @param iop This is the RTEMS's internal representation of file
+ *  @param buffer data to be written
+ *  @param count  how many bytes to write
+ *
+ *  @retval On successful, this routine returns total bytes written. On error
+ *  it returns -1 and errno is set to proper value.
+ */
+extern ssize_t devFS_write(
+  rtems_libio_t *iop,
+  const void    *buffer,
+  size_t         count
+);
+
+/**
+ *  @brief Maps ioctl Operation to rtems_io_ioctl
+ *
+ *  This handler maps ioctl operation to rtems_io_ioctl.
+ *
+ *  @param iop This is the RTEMS's internal representation of file
+ *  @param command io control command
+ *  @param buffer  io control parameters
+ *
+ *  @retval On successful, this routine returns total bytes written. On error
+ *  it returns -1 and errno is set to proper value.
+ */
+extern int devFS_ioctl(
+  rtems_libio_t   *iop,
+  ioctl_command_t  command,
+  void            *buffer
+);
+
+/**
+ *  @brief Gets the Device File Information
+ *
+ *  This handler gets the device file information. This routine only
+ *  set the following member of struct stat:
+ *
+ *  - st_dev: device number
+ *  - st_mode: device file creation mode, only two mode are accepted:
+ *    + S_IFCHR: character device file
+ *    + S_IFBLK: block device file
+ *
+ *  @param loc contains filesystem access information
+ *  @param buf buffer to hold the device file's information
+ *
+ *  @retval On successful, this routine returns 0. On error
+ *  it returns -1 and errno is set to proper value.
+ */
+extern int devFS_stat(
+  const rtems_filesystem_location_info_t *loc,
+  struct stat                            *buf
+);
+
+/**
+ *  @brief Creates an item in the main device table.
+ *
+ *  This routine is invoked upon registration of a new device
+ *  file. It is responsible for creating a item in the main
+ *  device table. This routine searches the device table in
+ *  sequential order, when found a empty slot, it fills the slot
+ *  with proper values.
+ *
+ *  @see rtems_filesystem_mknod_t.
+ */
+extern int devFS_mknod(
+  const rtems_filesystem_location_info_t *parentloc,
+  const char                             *name,
+  size_t                                  namelen,
+  mode_t                                  mode,
+  dev_t                                   dev
+);
+
+/**
+ *  @brief Creates the Main Device Table
+ *
+ *  This routine is invoked upon rtems filesystem initialization.
+ *  It is responsible for creating the main device table,
+ *  initializing it to a known state, and set device file operation
+ *  handlers. After this, the device-only filesytem is ready for use
+ *
+ *  @param  mt_entry The filesystem mount table entry.
+ *  @param  data Filesystem specific data.
+ *
+ *  @retval upon success, this routine returns 0; otherwise it returns
+ *  -1 and errno is set to proper value. The only error is when malloc
+ *  failed, and errno is set to NOMEM.
+ */
+extern int devFS_initialize(
+  rtems_filesystem_mount_table_entry_t *mt_entry,
+  const void                           *data
+);
+
+/**
+ *  @brief Retrieves and Prints all the Device Registered in System
+ *
+ *  This routine retrieves all the device registered in system, and
+ *  prints out their detail information. For example, on one system,
+ *  devFS_show will print out following message:
+ *
+ *  @code
+ *    /dev/console     0  0
+ *    /dev/clock       1  0
+ *    /dev/tty0        0  0
+ *    /flash           2  0
+ *  @endcode
+ *
+ *  This routine is intended for debugging, and can be used by shell
+ *  program to provide user with the system information.
+ */
+extern void devFS_Show(void);
+
+#ifdef __cplusplus
+}
+#endif
+/**@}*/
+#endif
+