Build error on OS X 10.9.2 (unknown argument: '-multiply_definedsuppress')

[maciejtrybilo]

When installing the gem the build fails with:

linking shared-object gherkin_lexer_ar.bundle
clang: error: unknown argument: '-multiply_definedsuppress' [-Wunused-command-line-argument-hard-error-in-future]
clang: note: this will be a hard error (cannot be downgraded to a warning) in the future
make: *** [gherkin_lexer_ar.bundle] Error 1

[WooD1k]

Experiencing same issue

[maciejtrybilo]

Ok, this in fact can be solved by rebuilding ruby on your machine. Gems pick up the build settings from the ruby build and some unused flags can trickle through. See davidfstr/rdiscount#115

[johnnonolan]

Yep I've just encountered this.

[JashaadGaines]

I experienced the same issue when upgrading to Xcode 5.1 ( iOS 7.1 ). We ended up downgrading back to iOS 7.0 to get the functional tests running again. Hope this is fixed soon so that we can start using iOS 7.1.

[ghost]

I had the same issue...

You can resolve it by downgrading the level from error to warning using this command :

$ sudo ARCHFLAGS=-Wno-error=unused-command-line-argument-hard-error-in-future gem install gherkin

(see there for details : http://bruteforce.gr/bypassing-clang-error-unknown-argument.html)