[Bug target/81072] [avr] Support some XMEGA devices with flash seen in RAM address space.

[gjl at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81072

--- Comment #4 from Georg-Johann Lay <gjl at gcc dot gnu.org> ---
Author: gjl
Date: Wed Jul  5 13:57:28 2017
New Revision: 250000

URL: https://gcc.gnu.org/viewcvs?rev=250000&root=gcc&view=rev
Log:
gcc/
        Graceful degrade if Binutils PR21472 is not available.
        PR target/81072
        * configure.ac [target=avr]: WARN instead of ERROR if avrxmega3
        .rodata in flash test fails.
        (HAVE_LD_AVR_AVRXMEGA3_RODATA_IN_FLASH): Define it if test passes.
        * confgure: Regenerate.
        * config.in: Regenerate.
        * config/avr/avr.c (avr_asm_named_section)
        [HAVE_LD_AVR_AVRXMEGA3_RODATA_IN_FLASH]: Only trigger
        __do_copy_data for stuff in .rodata if flash_pm_offset = 0.
        (avr_asm_init_sections): Same.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config.in
    trunk/gcc/config/avr/avr.c
    trunk/gcc/configure
    trunk/gcc/configure.ac