[Bug target/67353] [avr] Option-ize Warning "appears to be a misspelled signal / interrupt handler"

[gjl at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67353

--- Comment #6 from Georg-Johann Lay <gjl at gcc dot gnu.org> ---
Author: gjl
Date: Tue Aug 22 09:48:48 2017
New Revision: 251269

URL: https://gcc.gnu.org/viewcvs?rev=251269&root=gcc&view=rev
Log:
gcc/
        Backport from 2016-06-15 trunk r237486.
        Backport from 2017-07-12 trunk r250156.
        PR target/79883
        PR target/67353
        * config/avr/avr.c (avr_set_current_function): Warn misspelled ISR
        only if -Wmisspelled-isr is on.  In diagnostic messages: Quote
        keywords and (parts of) identifiers.
        [WITH_AVRLIBC]: Warn functions named "ISR", "SIGNAL" or "INTERUPT".
        * doc/invoke.texi (AVR Options) <-Wmisspelled-isr>: Document.

Modified:
    branches/gcc-5-branch/gcc/ChangeLog
    branches/gcc-5-branch/gcc/config/avr/avr.c
    branches/gcc-5-branch/gcc/config/avr/avr.opt
    branches/gcc-5-branch/gcc/doc/invoke.texi