Hi,

We are developing software for different ARM targets
with or without operating systems
In the past, we used older versions of binutils and gcc
that we have built ourselves with essentially

configure --target=arm-unknown-elf --enable-interwork --enable-multilib

It worked fine.

But arm-unknown-elf has been deprecated and we wanted to upgrade
anyway to support new cortex-m3 and m4 platforms,
but we still want to support our old arm9 platforms

We tried to build new versions of binutils 2.22 and gcc 4.7.1 (and 0)
  and newlib with the new syntax

configure --target=arm-none-eabi --enable-interwork --enable-multilib

Then, some of our test programs do not compile any more with error

Error: selected processor does not support Thumb mode `blx r3'

However, if we build the same toolchain with

configure --target=arm-none-elf --enable-interwork --enable-multilib 
--enable-obsolete

then the code compiles again as in the good'ol days...

However we would like to move ahead and not use the --enable-obsolete option

What is the magic formula to configure binutils and gcc ?
Any idea?

I provide attached a test program that fails to compile ,

-- 

Thanks for any help
Vania Joloboff