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Sprite 1984 - 1993
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Sprite 1984 - 1993.iso
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cmds
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as
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as_front.c
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C/C++ Source or Header
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1990-08-09
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3KB
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114 lines
/*
* as.c --
*
* Front end for assembler.
*
* Copyright 1989 Regents of the University of California
* Permission to use, copy, modify, and distribute this
* software and its documentation for any purpose and without
* fee is hereby granted, provided that the above copyright
* notice appear in all copies. The University of California
* makes no representations about the suitability of this
* software for any purpose. It is provided "as is" without
* express or implied warranty.
*/
#ifndef lint
static char rcsid[] = "$Header: /sprite/src/cmds/as/RCS/as_front.c,v 1.2 90/08/06 21:07:58 rab Exp Locker: rab $";
#endif /* not lint */
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <sys/param.h>
#include <assert.h>
#ifndef __STDC__
#define const
#endif
#ifndef EXIT_FAILURE
#define EXIT_FAILURE 1
#endif
#ifdef sun3
static const char *hostMachine = "sun3";
#else
#ifdef sun4
static const char *hostMachine = "sun4";
#else
#ifdef ds3100
static const char *hostMachine = "ds3100";
#else
#ifdef symm
static const char *hostMachine = "symm";
#else
NO DEFAULT TARGET MACHINE TYPE DEFINED
#endif
#endif
#endif
#endif
/*
*----------------------------------------------------------------------
*
* main --
* Search through the command line arguments looking for an argument
* of the form -mfoo, where `foo' is a machine type. If found, delete
* it from the list of arguments, and use it to determine which
* backend to exec. If there is no -m then default to the type
* of the host machine.
*
* Results:
* None.
*
* Side effects:
* Execs machine assembler backend.
*
*----------------------------------------------------------------------
*/
void
main(argc, argv)
int argc;
char **argv;
{
extern int errno;
int i;
int j;
const char *targetMachine;
char path[MAXPATHLEN];
assert(argv[argc] == NULL);
targetMachine = hostMachine;
for (i = 1; i < argc; ++i) {
if (argv[i][0] == '-' && argv[i][1] == 'm') {
if (argv[i][2] == '\0') {
targetMachine = argv[i + 1];
if (targetMachine == NULL) {
fprintf(stderr, "No target machine specified\n");
exit(EXIT_FAILURE);
}
for (j = i; j < argc - 1; ++j) {
argv[j] = argv[j + 2];
}
argc -= 2;
assert(argv[argc] == NULL);
} else {
targetMachine = argv[i] + 2;
for (j = i; j < argc; ++j) {
argv[j] = argv[j + 1];
}
--argc;
assert(argv[argc] == NULL);
}
break;
}
}
sprintf(path, "/sprite/lib/gcc/%s.md/as.%s", hostMachine, targetMachine);
execv(path, argv);
fprintf(stderr, "Can't exec ``%s'': %s\n", path, strerror(errno));
exit(EXIT_FAILURE);
}