[Bug target/65296] [avr] fix various issues with specs file generation

["gjl at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65296

--- Comment #3 from Georg-Johann Lay <gjl at gcc dot gnu.org> ---
Author: gjl
Date: Tue Mar 10 09:50:41 2015
New Revision: 221316

URL: https://gcc.gnu.org/viewcvs?rev=221316&root=gcc&view=rev
Log:
    PR target/65296
    * config.gcc (extra_options) [avr]: Remove.
    (extra_gcc_objs) [avr]: Use driver-avr.o, avr-devices.o.
    (tm_file) [avr]: Add avr/specs.h after avr/avr.h.
    (tm_defines) [avr-*-rtems*]: Add WITH_RTEMS.
    * config/avr/avr.opt (config/avr/avr-arch.h): Remove include.
    (-mmcu=): Add Var and MissingArgError properties.
    (-march=): Remove.
    * config/avr/genmultilib.awk: Use -mmcu= instead of -march=.
    * config/avr/t-multilib: Regenerate.
    * config/avr/specs.h: New file.
    * config/avr/driver-avr.c: New file.
    * config/avr/genopt.sh: Remove file.
    * config/avr/avr-tables.opt: Remove file.
    * config/avr/predicates.md (avr_current_arch): Rename to avr_arch.
    * config/avr/avr-c.c: Same.
    * avr-arch.h: Same.
    (avr_current_device): Remove proto.
    * config/avr/avr.h (avr_current_arch): Rename to avr_arch.
    (AVR_HAVE_8BIT_SP): Don't depend on avr_current_device.
    (EXTRA_SPEC_FUNCTIONS): Define.
    (avr_devicespecs_file): New specs function proto.
    (DRIVER_SELF_SPECS): Use device-specs-file spec function.
    * config/avr/avr.c (avr_current_arch): Rename to avr_arch.
    (avr_current_device): Remove definition and usage.
    (avr_set_core_architecture): New static function.
    (avr_option_override): Use it.
    * config/avr/avr-devices.c (diagnostic.h, avr-arch.h): Include them.
    (mcu_name): New static array.
    (comparator, avr_archs_str, avr_mcus_str): New static functions.
    (avr_inform_devices, avr_inform_core_architectures): New functions.
    * config/avr/gen-avr-mmcu-specs.c (avr-arch.h, specs.h): Include.
    (avrlibc.h) [WITH_AVRLIBC]: Include.
    (../rtems.h, rtems.h) [WITH_RTEMS]: Include.
    (print_mcu): Rewrite from scratch.
    * config/avr/avrlibc.h (LIB_SPEC, LIBGCC_SPEC, STARTFILE_SPEC):
    Forward to avr-specific specs defined in device-specs file.
    * config/avr/t-avr (driver-avr.o): New rule.
    (avr-devices.o): Depend on avr-arch.h.
    (avr-mcus): No more depend on avr-tables.opt.
    (avr-tables.opt): Remove rule.
    (install-device-specs): Use INSTALL_DATA, not INSTALL_PROGRAM.


Added:
    trunk/gcc/config/avr/driver-avr.c
    trunk/gcc/config/avr/specs.h
Removed:
    trunk/gcc/config/avr/avr-tables.opt
    trunk/gcc/config/avr/genopt.sh
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config.gcc
    trunk/gcc/config/avr/avr-arch.h
    trunk/gcc/config/avr/avr-c.c
    trunk/gcc/config/avr/avr-devices.c
    trunk/gcc/config/avr/avr-mcus.def
    trunk/gcc/config/avr/avr.c
    trunk/gcc/config/avr/avr.h
    trunk/gcc/config/avr/avr.opt
    trunk/gcc/config/avr/avrlibc.h
    trunk/gcc/config/avr/gen-avr-mmcu-specs.c
    trunk/gcc/config/avr/gen-avr-mmcu-texi.c
    trunk/gcc/config/avr/genmultilib.awk
    trunk/gcc/config/avr/predicates.md
    trunk/gcc/config/avr/t-avr
    trunk/gcc/config/avr/t-multilib