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From: Kumar Gala <galak@kernel.crashing.org>
Subject: Re: [PATCH] ppc: Add support for AMCC Taishan 440GX eval board
Date: Tue, 13 Feb 2007 18:30:40 -0600
To: David Gibson <david@gibson.dropbear.id.au>
Cc: linuxppc-dev@ozlabs.org, Jon Loeliger <jdl@jdl.com>,
	Stefan Roese <sr@denx.de>, Roland Dreier <rdreier@cisco.com>,
	linuxppc-embedded@ozlabs.org
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On Feb 13, 2007, at 6:11 PM, David Gibson wrote:

> On Mon, Feb 12, 2007 at 11:28:17PM -0600, Kumar Gala wrote:
>>
>> On Feb 12, 2007, at 6:46 PM, David Gibson wrote:
>>
>>> On Mon, Feb 12, 2007 at 02:41:36PM -0600, Kumar Gala wrote:
>>>>
>>>> On Feb 12, 2007, at 2:23 PM, Benjamin Herrenschmidt wrote:
>>>>
>>>>> On Mon, 2007-02-12 at 14:16 -0600, Jon Loeliger wrote:
>>>>>> So, like, the other day Benjamin Herrenschmidt mumbled:
>>>>>>>
>>>>>>> Note that there are still things that we might want to  
>>>>>>> change. For
>>>>>>> example, I think we really should look into adding a macro
>>>>>>> mecanism
>>>>>>> and/or an include mecanism to dtc so that we can do things like
>>>>>>> #include
>>>>>>> <ibm440gp.dtc> to get the base processor/SoC definition and then
>>>>>>> "overlay" some properties on top of it (like emac phy mode  
>>>>>>> etc...)
>>>>>>
>>>>>> What do people prefer here?  Straight CPP pre-run?
>>>>>
>>>>> CPP pre-run has issue, notably due to the usage of "#" in property
>>>>> names.
>>>>
>>>> You can get around that by invoking cpp with the right flags,  I
>>>> looked at doing this a while back and had it working.
>>>
>>> Umm.. which flags?
>>
>> cpp -undef -P -x assembler-with-cpp
>
> What exactly does the -x assembler-with-cpp do?  I can't seem to find
> a useful description in the man page or info.

I think it treats the input as if where of assembler syntax.  And  
thus # has special meaning in some places.

- k