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From: Matt Bartley <mbartley@lear35.cytex.com>
Message-Id: <199603231905.LAA02099@lear35.cytex.com>
Subject: kern/subr_prf.c
To: freebsd-current@freebsd.org
Date: Sat, 23 Mar 1996 11:05:13 -0800 (PST)
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I just ran sup this morning.  This is what happened when I tried to
recompile the kernel:

cc -c -O -W -Wreturn-type -Wcomment -Wredundant-decls -Wimplicit
  -Wnested-externs -Wstrict-prototypes -Wmissing-prototypes  -Winline
  -nostdinc -I. -I../.. -I../../sys -I../../../include -DI386_CPU -DI486_CPU
  -DI586_CPU -DI686_CPU -DATAPI -DFAILSAFE -DCOMPAT_43 -DCD9660 -DMSDOSFS
  -DNFS -DFFS -DINET -DKERNEL  ../../kern/subr_prf.c
../../kern/subr_prf.c: In function `panic':
../../kern/subr_prf.c:123: `debugger_on_panic' undeclared (first use this
  function)
../../kern/subr_prf.c:123: (Each undeclared identifier is reported only once
../../kern/subr_prf.c:123: for each function it appears in.)
*** Error code 1

Stop.

That was with the GENERIC kernel - I tried that after my custom kernel
failed the same way.

from kern/subr_prf.c:
debugger_on_panic is declared
----------------------------------------------------------------------
#if defined(DDB) || defined (KGDB)
#ifdef DDB_UNATTENDED
	static int debugger_on_panic = 0;
#else
	static int debugger_on_panic = 1;
#endif

SYSCTL_INT(_debug, OID_AUTO, debugger_on_panic, CTLFLAG_RW,
	&debugger_on_panic, 0, "");
#endif
----------------------------------------------------------------------
here is where it failed in compile, at the end of the fuction panic():
----------------------------------------------------------------------
	printf("\n");

	if (debugger_on_panic) {              <---- source of error
#ifdef KGDB
		kgdb_panic();
#endif
#ifdef DDB
		Debugger ("panic");
#endif
	}
	boot(bootopt);
}
----------------------------------------------------------------------