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(main): Define hidden automatic variable with command vars, and

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MAKEOVERRIDES to a reference to that.
(define_makeflags): If posix_pedantic, write a reference to that instead.
This commit is contained in:
Roland McGrath 1994-10-01 08:07:35 +00:00
parent fa999783d7
commit 1766b7fa59
1 changed files with 25 additions and 5 deletions
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26
main.c
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@ -602,8 +602,19 @@ main (argc, argv, envp)
}
p[-1] = '\0'; /* Kill the final space and terminate. */
/* Define the variable; this will not override any user definition. */
(void) define_variable ("MAKEOVERRIDES", 13, value, o_env, 0);
/* Define an unchangeable variable with a name that no POSIX.2
makefile could validly use for its own variable. */
(void) define_variable ("-*-command-variables-*-", 23,
value, o_automatic, 0);
/* Define the variable; this will not override any user definition.
Normally a reference to this variable is written into the value of
MAKEFLAGS, allowing the user to override this value to affect the
exported value of MAKEFLAGS. In POSIX-pedantic mode, we cannot
allow the user's setting of MAKEOVERRIDES to affect MAKEFLAGS, so
a reference to this hidden variable is written instead. */
(void) define_variable ("MAKEOVERRIDES", 13,
"${-*-command-variables-*-}", o_env, 1);
}
/* If there were -C flags, move ourselves about. */
@ -1582,6 +1593,7 @@ define_makeflags (all, makefile)
int all, makefile;
{
static const char ref[] = "$(MAKEOVERRIDES)";
static const char posixref[] = "$(-*-command-variables-*-)";
register const struct command_switch *cs;
char *flagstring;
register char *p;
@ -1695,7 +1707,7 @@ define_makeflags (all, makefile)
break;
}
flagslen += 4 + sizeof ref; /* Four more for the possible " -- ". */
flagslen += 4 + sizeof posixref; /* Four more for the possible " -- ". */
#undef ADD_FLAG
@ -1767,9 +1779,17 @@ define_makeflags (all, makefile)
}
/* Copy in the string. */
if (posix_pedantic)
{
bcopy (posixref, p, sizeof posixref - 1);
p += sizeof posixref - 1;
}
else
{
bcopy (ref, p, sizeof ref - 1);
p += sizeof ref - 1;
}
}
else if (p[-1] == '-')
/* Kill the final space and dash. */
p -= 2;