Re: [PATCH] parisc: dont unconditionally override CROSS_COMPILE for64 bit.

From: John David Anglin
Date: Mon Feb 27 2012 - 11:44:51 EST

On 2/27/2012 11:28 AM, Paul Gortmaker wrote:
On 12-02-27 10:14 AM, John David Anglin wrote:
> On 2/26/2012 6:26 PM, Paul Gortmaker wrote:
>> Using the 64 bit toolchains from kernel.org[1], one finds that
>> you can't build the a500_defconfig, because the Makefile will
>> stomp whatever value you have in your env. for CROSS_COMPILE.
>>
>> This shows up since the kernel.org toolchains for parisc-64
>> do not have the "-gnu" prefix, and so you run into it always
>> saying hppa64-linux-gnu-gcc not found, regardless of the fact
>> you've not got "-gnu" put anywhere into CROSS_COMPILE.
>>
>> [1]ftp://ftp.kernel.org/pub/tools/crosstool/files/bin/x86_64/4.5.2/
>>
>> Signed-off-by: Paul Gortmaker<paul.gortmaker@xxxxxxxxxxxxx>
>>
>> diff --git a/arch/parisc/Makefile b/arch/parisc/Makefile
>> index 55cca1d..cefff6d 100644
>> --- a/arch/parisc/Makefile
>> +++ b/arch/parisc/Makefile
>> @@ -31,7 +31,9 @@ ifdef CONFIG_64BIT
>> UTS_MACHINE := parisc64
>> CHECKFLAGS += -D__LP64__=1 -m64
>> WIDTH := 64
>> -CROSS_COMPILE := hppa64-linux-gnu-
>> +ifndef CROSS_COMPILE
>> + CROSS_COMPILE := hppa64-linux-gnu-
>> +endif
>> else # 32-bit
>> WIDTH :=
>> endif
> This change breaks native builds. So, I assume CROSS_COMPILE must be
> previously defined.
You lost me here. As in a native 32bit env. doing a build for the
64 bit case is setting CROSS_COMPILE?

Yes, native hppa is 32 bit . Building a 64-bit kernel with CONFIG_64BIT causes the
setting of CROSS_COMPILE and the selection of hppa64-linux-gnu-gcc, etc.
If CROSS_COMPILE wasn't previously defined, your change wouldn't have have
affected the 64-bit build.

Dave

--
John David Anglin dave.anglin@xxxxxxxx

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