Re: [ECOS] Macro problem building ecos with powerpc cross-compiler

[Gary Thomas <gary at mlbassoc dot com>]

On Tue, 2005-06-28 at 11:22 +0100, Leo Khale wrote:
> Hi there,
> 
> I'm attempting to build an ecos project using a powerpc-eabi 
> cross-compiler on Linux. I have successfully built the toolchain but 
> have hit a problem compiling the actual code concerning multiply defined 
> assembler macros. The error appears while compiling an assembler file 
> context.S, and the macros themselves in cyg/hal/arch.inc, for example:
> 
>     .macro    lwi    reg,val
>     .macro    hal_fpu_load regs
> 
> I'm aware that as I compile three separate copies of this arch.inc exist 
> on my machine:
> 
> - the original one in the ecos_repository/packages tree
> - the one copied to my app source tree (with other kernel headers) by 
> the ecosconfig tool for compiling my application
> - the one present in the headers gnutools/powerpc-eabi/sys-include tree 
> for building the cross-compiler
> 
> Since the include file is assembler and not guarded, my guess is that 
> it's somehow being included twice. Can anyone suggest what might be 
> wrong with my setup to cause this, or what the cause might be if not this?
> 
> I append an error trace below
> 
> Thanks
> 
> Leo
> 
> powerpc-eabi-gcc -c  
> -I/home/leok/dev/projects/architectural/ecos_kernel/full/install/include 
> -I/home/leok/ecos_repository/packages/hal/powerpc/arch/v2_0_26 
> -I/home/leok/ecos_repository/packages/hal/powerpc/arch/v2_0_26/src 
> -I/home/leok/ecos_repository/packages/hal/powerpc/arch/v2_0_26/tests -I. 
> -I/home/leok/ecos_repository/packages/hal/powerpc/arch/v2_0_26/src/ 
> -finline-limit=7000 -msoft-float -mcpu=860 -Wall -Wpointer-arith 
> -Wstrict-prototypes -Winline -Wundef  -g -ffunction-sections 
> -fdata-sections -fno-exceptions    -Wp,-MD,src/context.tmp -o 
> src/hal_powerpc_arch_context.o 
> /home/leok/ecos_repository/packages/hal/powerpc/arch/v2_0_26/src/context.S
> /home/leok/dev/projects/architectural/ecos_kernel/full/install/include/cyg/hal/arch.inc: 
> Assembler messages:
> /home/leok/dev/projects/architectural/ecos_kernel/full/install/include/cyg/hal/arch.inc:140: 
> Error: Macro with this name was already defined
> /home/leok/dev/projects/architectural/ecos_kernel/full/install/include/cyg/hal/arch.inc:171: 
> Error: Macro with this name was already defined
> /home/leok/dev/projects/architectural/ecos_kernel/full/install/include/cyg/hal/arch.inc:181: 
> Error: Macro with this name was already defined
> /home/leok/dev/projects/architectural/ecos_kernel/full/install/include/cyg/hal/arch.inc:197: 
> Error: Macro with this name was already defined
> /home/leok/dev/projects/architectural/ecos_kernel/full/install/include/cyg/hal/arch.inc:207: 
> Error: Macro with this name was already defined
> /home/leok/dev/projects/architectural/ecos_kernel/full/install/include/cyg/hal/arch.inc:218: 
> Error: Macro with this name was already defined
> make[1]: *** [src/context.o.d] Error 1
> make[1]: Leaving directory 
> `/home/leok/dev/projects/architectural/ecos_kernel/full/hal/powerpc/arch/v2_0_26'

You need to add some protection to the *.S and *.h files to protect
against this.  The newer tools complain if there are multiple
versions of the same .macro (older tools just replaced them)

-- 
------------------------------------------------------------
Gary Thomas                 |  Consulting for the
MLB Associates              |    Embedded world
------------------------------------------------------------


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