-Werror=unused-value does not give error when ignoring return value of function with attribute warn_unused_result

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To: MSX to GCC <gcc-help@xxxxxxxxxxx>
Subject: -Werror=unused-value does not give error when ignoring return value of function with attribute warn_unused_result
From: Erik <esigra@xxxxxxxxx>
Date: Thu, 02 Jul 2009 00:39:02 +0200
User-agent: Thunderbird 2.0.0.21 (X11/20090430)

I need to get an error when the return value of a function withattribute warn_unused_result is ignored. I added-Werror=unused-function, -Werror=unused-label and -Werror=unused-valuebut nothing seems to work.

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