can't run validate on OS X for 7.10 head branch!

Carter Schonwald carter.schonwald at
Sat Mar 21 23:52:23 UTC 2015

hey everyone!

error: unknown warning option '-Werror=unused-but-set-variable'; did you
mean '-Werror=unused-const-variable'? [-Werror,-Wunknown-warning-option]

is the key bit, seems like apple clang bundled with xcode 6 doesn't have
that option

thoughts? (do we need to do some auto conf magic to support more clang

this gist provides a bit more context

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