Building gnat/rtems with gnat 3.12p and gcc2.8.1 (hello_world_ada)

[lange92 at 2067.resnet.uni.edu]

Hi all,
  I found that I could successfully build the hello_world_ada example
with the pc386 bsp using the attached Makefile and init.c files.
Basically, the changes I made were to change the function named gnat_main
to _ada_main in 2 places in the init.c file, and created 2 variables
called libobjdir and libsrcdir in the Makefile, and added the parameters
-aOdir and -aIdir to gnatmake in the `all' target, respectively.
  Everything compiles fine, and it ends by running the i386-rtemscoff-size
program, with the following results:

   text    data     bss     dec     hex filename
 147808    7324   32756  187888   2ddf0 hello

  However, the web page says that it should create
   hello_world_ada/o-optimize/<filename>.exe
so that would be
   hello_world_ada/o-optimize/hello.exe

  Maybe I'm just being paranoid, since it did produce a binary, but there
is no o-optimize directory created, and there is no reference to
o-optimize in the Makefile. I'm quite happy to report that I no longer
need any crt*.o files copies to the directory where I'm building
hello_world_ada.

  Now, the binary is 2161934 bytes in size, so it's too large to be
written to a floppy and booted, if that is the proper way to test it. So
how do I test the executable? Should I build a netboot floppy and send it
over via a simple bootp/tftp bootstrapping method? The documentation just
states that this step is dependent on the bsp selected (pc386).

  I also have not figured out the use of "-n" and where to put a reference
to call "adafinal", as Joel pointed out in a previous message.

  Any ideas where to go from here?

DanL

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#
#  Makefile for hello world example
#

MAIN=hello

# Tool paths
tooldir=/users/lange92/illinoiscentral/rtems-4.5.0-gnat-3.12p-gcc-2.8.1-i386-rtemscoff
rtemsdir=/users/lange92/illinoiscentral/rtems-4.5.0-gnat-3.12p-gcc-2.8.1-i386-rtemscoff-noinitfini/pc386
#rtemsdir=${tooldir}/rtems/score603e
#rtemsdir=/users/lange92/illinoiscentral/rtems-i386/pc386/
#libsrcdir=/
libobjdir=/users/lange92/illinoiscentral/rtems-4.5.0-gnat-3.12p-gcc-2.8.1-i386-rtemscoff/lib/gcc-lib/i386-rtemscoff/2.8.1/adalib
libsrcdir=/users/lange92/illinoiscentral/rtems-4.5.0-gnat-3.12p-gcc-2.8.1-i386-rtemscoff/lib/gcc-lib/i386-rtemscoff/2.8.1/adainclude

# Tool names
GCC=${tooldir}/bin/i386-rtemscoff-gcc
GNATMAKE=${tooldir}/bin/i386-rtemscoff-gnatmake
SIZE=${tooldir}/bin/i386-rtemscoff-size

CARGS=-B${rtemsdir}/lib/ -specs ${rtemsdir}/lib/bsp_specs -qrtems -mcpu=i386

all: init.o 
	$(GNATMAKE) -v -O -gnata -gnatE -gnato $(MAIN) -g \
	    -cargs $(CARGS) \
            -aOdir $(libobjdir) \
            -aIdir $(libsrcdir) \
	    -largs $(CARGS) init.o
	$(SIZE) $(MAIN)



init.o: init.c
	$(GCC) -O4 -g  -Wall -ansi -fasm $(CARGS) -c init.c

run:
	@ echo Must run on the real target

gdb:
	@ echo No real target

clean:
	rm -f b_$(MAIN).c b_$(MAIN).o *.o *.ali $(MAIN)
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/* 
 *  COPYRIGHT (c) 1989-1997.
 *  On-Line Applications Research Corporation (OAR).
 *  Copyright assigned to U.S. Government, 1994.
 *
 *  The license and distribution terms for this file may be found in
 *  the file LICENSE in this distribution or at
 *  http://www.OARcorp.com/rtems/license.html.
 *
 *  $Id: init.c,v 1.13 1996/06/10 20:49:07 joel Exp $
 */

#include <bsp.h>

#include <assert.h>
#include <pthread.h>

#ifdef GNAT_PID
#include <unistd.h>
pid_t getpid()
{
  return GNAT_PID;
}
#endif

/*
 *  By having the POSIX_Init thread create a second thread just
 *  to invoke gnat_main, we can override all default attributes
 *  of the "Ada environment task".  Otherwise, we would be
 *  stuck with the defaults set by RTEMS.
 */
 
void *start_gnat_main( void * argument )
{
  extern int _ada_main ( int argc, char **argv, char **envp );

  (void) _ada_main ( 0, 0, 0 );

  exit( 0 );

  return 0;
}

void *POSIX_Init( void *argument )
{
  pthread_t       thread_id;
  pthread_attr_t  attr;
  int             status;

  status = pthread_attr_init( &attr );
  assert( !status );

#ifdef GNAT_MAIN_STACKSPACE
  status = pthread_attr_setstacksize( &attr, GNAT_MAIN_STACKSPACE );
  assert( !status );
#endif

  status = pthread_create( &thread_id, &attr, start_gnat_main, NULL );
  assert( !status );

  pthread_exit( 0 );

  return 0;
}

/* configuration information */

#define CONFIGURE_SPTEST

#define CONFIGURE_TEST_NEEDS_CONSOLE_DRIVER
#define CONFIGURE_TEST_NEEDS_CLOCK_DRIVER

#define CONFIGURE_MICROSECONDS_PER_TICK RTEMS_MILLISECONDS_TO_MICROSECONDS(1)

#define CONFIGURE_POSIX_INIT_THREAD_TABLE

#define CONFIGURE_MAXIMUM_POSIX_THREADS              20
#define CONFIGURE_MAXIMUM_POSIX_KEYS                 20
#define CONFIGURE_MAXIMUM_POSIX_MUTEXES              30
#define CONFIGURE_MAXIMUM_POSIX_CONDITION_VARIABLES  20

#define CONFIGURE_INIT

#include <confdefs.h>