Re: [arm-gcc] Thumb Interworking

[Nathan Sidwell <nathan@xxxxxxxxxxxxxxxx>]

Rushikesh Shingnapurkar wrote:
> Dear Sir,
>  
> I am trying to use THUMB mode for a single file.
> Compilation is done with "-mthumb" option & other files are compiled 
> with "-mthumb-interwork" option.
> But, while linking it gives following warning.
>  
> *ld -cref -Map map.txt -S -T link.txt -lc -lm -lgcc
> *ld: Warning: c:\toolchain\arm-none-elf\bin/../lib\libc.a(memcpy.o) does 
> not support interworking, whereas out.o does
>  
> Can you help me to avoid this warning ?
It looks like you're using a bespoke linker script and invoking the linker 
explicitly.  Am I correct in guessing that the error remains, even when the 
-mthumb only object file is not being linked in?
How are you setting up the library search paths?  In particular, it seems that 
you are not pointing to the interworking libraries.  GCC does this automatically 
when you use gcc to link.  Perhaps you can use the -v option to gcc to see how 
it drives the linker in situations similar to your own -- the link command will, 
confusingly, be a tool call 'collect2'.
nathan

--
Nathan Sidwell    ::   http://www.codesourcery.com   ::     CodeSourcery LLC
nathan@xxxxxxxxxxxxxxxx    ::     http://www.planetfall.pwp.blueyonder.co.uk