Re: [arm-gnu] EABI version 5, but target u-boot has EABI version 0

["Hans J. Koch" <hjk@xxxxxxxxxxxxx>]

On Sat, Feb 07, 2009 at 12:22:29AM +0100, Remy Bohmer wrote:
> Hi,
> 
> 2009/2/7 Brian <2nfinite@xxxxxxxxx>:
> >
> > On Feb 6, 2009, at 12:08 PM, Chen-Tsai Huang wrote:
> >
> >> I am using arm-2008q1 to compile the u-boot,
> >> I got the following linker error.
> >
> > This is a simple problem to fix. First you need to understand that the ARM
> > EABI and ARM GNU/Linux toolchains are different. The Linux kernel and
> > applications are compiled with ARM GNU/Linux toolchain, while bootloaders
> > are compiled with ARM EABI toolchain.
> >
> > U-boot is a bare-metal application, therefore use the ARM EABI toolchain.
> > That is the best way to compile U-boot and other non-Linux applications. It
> > is possible to compile U-boot with Linux toolchain but not recommended.
> > Explanation of the error in the archives:
> > http://www.codesourcery.com/archives/arm-gnu/msg02332.html
> 
> My 2 cents:
> U-boot explicitly compiles its binaries for ARM with -mabi=apcs-gnu,
> not EABI, so linking to any EABI compiled libgcc will cause the same
> error message.
> In mainline U-boot currently all libgcc-provided-routines for ARM are
> also implemented in the lib_arm directory. (yes, it is dirty, but it
> is done this way for ARM). So, as long as there is an implementation
> in the lib_Arm directory, nothing will be used from libgcc, and this
> error will not be seen, even if you use a linux destined compiler.
> 
> I noticed that this question was about an very out-dated version of
> U-boot, namely 1.1.4, so that might be cause some troubles as well.

Yep, I heard it's getting slightly better with more recent versions of
U-Boot.

> 
> So, use a proper compiler toolchain (not EABI, but surely a bare metal
> edition). Several options are possible, you can also use the ARM-ELDK
> from denx.de

Thanks, Remy. I second all of your statements.

Hans