From owner-freebsd-hackers  Wed Jan 16 11: 6:26 2002
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Date: Wed, 16 Jan 2002 11:05:56 -0800 (PST)
From: Matthew Jacob <mjacob@feral.com>
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To: hackers@freebsd.org
Cc: Peter Wemm <peter@netplex.com.au>
Subject: multilpe ddb_regs definitions
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I've had problems compiling alpha kernels for the last week or so- this
occurs (with or w/o DDB optioned in).

subr_pcpu.o: In function `pcpu_init':
/tstsys/alpha/compile/GPLUS/../../../kern/subr_pcpu.c(.data+0x8): multiple
definition of `ddb_regs'
kern_mutex.o:/tstsys/alpha/compile/GPLUS/../../../kern/kern_mutex.c:127: first
defined here
subr_witness.o: In function `witness_init':
/tstsys/alpha/compile/GPLUS/../../../kern/subr_witness.c:349: multiple
definition of `ddb_regs'
kern_mutex.o:/tstsys/alpha/compile/GPLUS/../../../kern/kern_mutex.c:127: first
defined here
tty_cons.o: In function `cnadd':
/tstsys/alpha/compile/GPLUS/../../../kern/tty_cons.c:199: multiple definition
of `ddb_regs'
kern_mutex.o:/tstsys/alpha/compile/GPLUS/../../../kern/kern_mutex.c:127: first
defined here
machdep.o: In function `alpha_init':
/tstsys/alpha/compile/GPLUS/../../../alpha/alpha/machdep.c:527: multiple
definition of `ddb_regs'
kern_mutex.o:/tstsys/alpha/compile/GPLUS/../../../kern/kern_mutex.c:127: first
defined here


I haven't really tracked down what is different or broken, but I notice that
ddb_regs is defined as common storage in <machine/db_machdep.h> (whether DDB
is optioned to exist or not).

Instead, shouldn't that be an 'extern' reference and ddb_regs put some place
like machdep.c along with the other DDB option'd vars?

Doing this for alpha allowed my kernel compile to continue.

Thoughts?

-matt



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