Merge branch 'jk/limit-developers-to-gnu99'

Enable -std=gnu99 option in DEVELOPER builds. * jk/limit-developers-to-gnu99: config.mak.dev: specify -std=gnu99 for gcc/clang

Junio C Hamano committed Dec 22, 2021 at 22:48 UTC 553641555140a5aa4bab542246a401ea174364b7

No changes.