The absence of a arm-thumb interworking libgcc.a

[Richard Earnshaw]

>  It seems that there is neither arm-interworking libgcc.a nor
> thumb-interworking libgcc.a in gcc3.2.
> In order to generate arm interworking libgcc.a and thumb interworking 
> libgcc.a, what should I do?
> 

> I guess if I can get libgcc.a compiled with -mthumb-interwork or
> -mthumb -mthumb-interwork , it all should work out. 
> 
> Then, I have a look at ~/rpm/BUILD/gcc-3.2/gcc/config/arm/t-arm-elf
> and find these three lines are already uncommented:
> 
>   MULTILIB_OPTIONS     = marm/mthumb
>   MULTILIB_DIRNAMES    = arm thumb
>   MULTILIB_EXCEPTIONS  =
> 
> which means interworking libgcc.a is supporsed to exist.
> 

You need to uncomment the multi-lib options that build the interworking 
variants of libgcc.a (they are in the same file as the ones you cite 
above).

# MULTILIB_OPTIONS    += mno-thumb-interwork/mthumb-interwork
# MULTILIB_DIRNAMES   += normal interwork
# MULTILIB_EXCEPTIONS += *mapcs-26/*mthumb-interwork*
# 

Having done that you will have to rebuild and install your compiler.

R.