source: rtems/bsps/powerpc/mvme5500/include/bsp/GT64260TWSI.h @ 2afb22b

5
Last change on this file since 2afb22b was 2afb22b, checked in by Chris Johns <chrisj@…>, on 12/23/17 at 07:18:56

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.
  • Property mode set to 100644
File size: 504 bytes
Line 
1#ifndef __GT64260TWSI_h
2#define __GT64260TWSI_h
3
4/* GT64260TWSI.h -  header for the GT64260 Two-Wire Serial Interface */
5
6/* TWSI Control Register Bits */
7#define TWSI_ACK           4
8#define TWSI_INTFLG        8
9#define TWSI_STOP       0x10
10#define TWSI_START      0x20
11#define TWSI_TWSIEN     0x40
12#define TWSI_INTEN      0x80
13
14void GT64260TWSIinit(void);
15int GT64260TWSIstart(void);
16int GT64260TWSIwrite(unsigned char Data);
17int GT64260TWSIread(unsigned char *, int lastByte);
18int GT64260TWSIstop(void);
19
20#endif
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