Backport PR #24540 on branch v3.6.2-doc (DOC: add note about enabling c++11 support for old gcc) - #24562

Backport PR #24540 on branch v3.6.2-doc (DOC: add note about enabling c++11 support for old gcc)#24562

QuLogic merged 1 commit into

matplotlib:v3.6.2-docmatplotlib/matplotlib:v3.6.2-docfrom

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