Canadian cross build fails because the wrong compiler is used to compile
gen-avr-mmcu-texi. This small tool must run on build and not on host, thus
the right compiler is CC_FOR_BUILD.
Just changing the compiler is not enough because files like system.h were
dragged in that were configured for host, not for build.
Therefore the patch factors out the structures/enums that are shared between
the programs that run on host (compiler proper, driver) and gen-avr-mmcu-texi
that runs on build.
With the patch the compiler build fine, both as native cross
(build=host!=target) and as canadian cross (build!=host!=target!=build).
Moreover, I changed the string comparator in gen-avr-mmcu-texi.c to that
it prints the devices in a more appropriate order with the AVR device name
nomenclature.
Ok to apply?
Johann
* config.gcc (tm_file,avr): Add avr/avr-arch.h.
* config/avr/t-avr (gen-avr-mmcu-texi): Use CC_FOR_BUILD to
compile. Don't depend on TM_H. Use CFLAGS_FOR_BUILD.
* config/avr/avr.h (avr_arch, base_arch_s, mcu_type_s): Source out
to...
* config/avr/avr-arch.h: ...this new file.
* config/avr/gen-avr-mmcu-texi.c: Include avr-arch.h, stdio.h,
stdlib.h.
* comparator: Make letters smaller than digits.
* config/avr/avr-devices.c: Don't include headers if used in
gen-avr-mmcu-texi.c.
* doc/avr-mmcu.texi: Regenerate.
