git: doc: Document the steps to import and upgrade GCC

[Aaron LI]

commit 92a70ebf24f36e111933dc37ab9a0f1a39ac3dc7
Author: Aaron LI <aly at aaronly.me>
Date:   Wed Aug 5 14:16:44 2026 +0800

    doc: Document the steps to import and upgrade GCC
    
    This is partially based on a README created by Scott Parlane (sparlane).
    
    Credit: Scott Parlane (sparlane)

Summary of changes:
 contrib/gcc-12/README.DRAGONFLY |   2 +
 doc/upgrading_gcc.txt           | 150 ++++++++++++++++++++++++++++++++++++++++
 2 files changed, 152 insertions(+)
 create mode 100644 doc/upgrading_gcc.txt

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/92a70ebf24f36e111933dc37ab9a0f1a39ac3dc7


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