Hello,
this is a first proposal how to split up confdefs.h.
The general approach is to place the default configuration of things in
librtemscpu.a. The benefit is that the application configuration object file
will only include data structures which have a user-defined value.
The component based header files include their dependencies explicitly. It
should be possible to include component based header files separately to
ease
testing. For example we could use this template:
#ifndef _RTEMS_CONFDEFS_FOOBAR_H
#define _RTEMS_CONFDEFS_FOOBAR_H
#ifndef __CONFIGURATION_TEMPLATE_h
#error "Do not include this file directly, use <rtems/confdefs.h>
instead"
#endif
#if defined(CONFIGURE_INIT) && \
defined(CONFIGURE_FOOBAR_STUFF) && \
defined(CONFIGURE_MORE_FOOBAR_STUFF)
/* Foobar includes */
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
/* Configure foobar. */
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* CONFIGURE_INIT */
#endif /* _RTEMS_CONFDEFS_FOOBAR_H */
In case CONFIGURE_INIT is not defined, then including <rtems/confdefs.h>
should
expose nothing to the C compiler.
Here is a first proposal to group the configuration in components:
rtems/
confdefs.h
This file just includes the component based header files listed below.
confdefs/
bdbuf.h
classicobj.h
Classic API objects
classictasksinit.h
Classic initialization task
driverclock.h
Clock driver and related configuration, e.g.
CONFIGURE_MICROSECONDS_PER_TICK
driverconsolesimple.h
Simple console driver configuration
driverlegacy.h
Legacy IO driver configuration table
extensions.h
User extensions, internal extensions
filesystem.h
Filesystem configuration
general.h
Basic stuff which is mandatory to configure, e.g. ISR stacks,
per-CPU information
libpci.h
PCI library configuration
malloc.h
Malloc configuration
mpci.h
MPCI specific configuration options
msgq.h
General message queue configuration
obsolete.h
Warning about the use of obsolete configure options
posixkeys.h
POSIX keys
posixobj.h
POSIX objects
posixthreadsinit.h
POSIX initialization threads
scheduler.h
Scheduler configuration
support.h
Support macros for confdefs header files
threads.h
General thread configuration (e.g. thread control block)
unlimited.h
Unlimited objects configuration
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