Re: Trouble compiling MIPS cross-compiler

[Kumba <kumba@gentoo.org>]

Adam Nielsen wrote:

> Thanks for all the info!  Well, I tried building gcc-3.3.2 with your options 
> and that worked (hooray!) but I couldn't find binutils-2.14.90.0.7, the 
> closest I could see was 2.14 so I used that.  It all compiled ok, but now 
> when I go to compile the kernel I get this error:
> 
> cc1: error: invalid option `cpu=r3000'

http://www.kernel.org/pub/linux/devel/binutils/

The 2.14.90.0.X series of binutils is a linux-only release maintained by 
HJ Lu, while the 2.14 version is more or less the official GNU version.

As for the kernel, -mcpu was deprecated in gcc-3.2.x, and totally 
removed in gcc-3.3.x.  You'll want to use the -march option (or 
-mips[1234] as a synonym), although if you use a recent kernel source 
tree off linux-mips anoncvs, selecting the right CPU/Machinetype in 
menuconfig will supply the proper -march/-mipsX commands to the 
compiler.  You'll also want to pass something like this:

make ARCH=mips CROSS_COMPILE=mips-unknown-linux-gnu- <target>

Note: CROSS_COMPILE needs to be set to the CHOST the cross compiler was 
built with, in my cases, I use the extended CHOST form.  The more common 
form is mips[el]-linux (or mips64[el]-linux)

For 2.4, if you want a mips64 kernel, pass ARCH=mips64.  For 2.6, pass 
ARCH=mips and select 64-bit mode in menuconfig (or oldconfig or xconfig)


--Kumba

-- 
"Such is oft the course of deeds that move the wheels of the world: 
small hands do them because they must, while the eyes of the great are 
elsewhere."  --Elrond