git: gnu/cc80: Correct CFLAGS to fix mkdep warnings

[Aaron LI]

commit 95971b5ef8e976a45c1b0289f4e9ff2b623dca86
Author: Aaron LI <aly at aaronly.me>
Date:   Fri Oct 16 09:54:50 2026 +0800

    gnu/cc80: Correct CFLAGS to fix mkdep warnings
    
    These programs require to use a C++ compiler to compile their '.c'
    sources, so they used hacks to do this, one of which is overriding
    'MKDEPCC=${CXX}'.  However, the CFLAGS wasn't overridden, so calling
    mkdep(1) programs would give the warnings:
    
    ```
    cc1plus: warning: command-line option '-std=gnu11' is valid for C/ObjC but not for C++
    ```
    
    Fix it by additionally overriding CC and CFLAGS, similar to the
    practice used in 'cc80/cc_tools/libcpp/Makefile'.  One bonus is that we
    can also remove the rule overriding.

Summary of changes:
 gnu/usr.bin/cc80/drivers/c++/Makefile  | 12 +++++-------
 gnu/usr.bin/cc80/drivers/cc/Makefile   | 12 +++++-------
 gnu/usr.bin/cc80/drivers/cpp/Makefile  | 12 +++++-------
 gnu/usr.bin/cc80/drivers/gcov/Makefile | 12 +++++-------
 4 files changed, 20 insertions(+), 28 deletions(-)

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/95971b5ef8e976a45c1b0289f4e9ff2b623dca86


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