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[avr-libc-dev] [bug #27201] _WORDREGISTER in xmega headers does not work

From: Joerg Wunsch
Subject: [avr-libc-dev] [bug #27201] _WORDREGISTER in xmega headers does not work in C99 mode
Date: Fri, 07 Aug 2009 10:52:35 +0000
User-agent: Mozilla/5.0 (X11; U; Linux i686 (x86_64); en-US; rv: Gecko/20081217 SeaMonkey/1.1.14

Follow-up Comment #1, bug #27201 (project avr-libc):

The problem is that accessing the union (and also struct,
for byte-wide access) elements without naming the union
itself is a GCC extension, so it is turned off when compiling
with -std=c99.

It appears to me that prepending the entire union declaration
with __extension__ does fix it by telling GCC "It's OK to use
the following GCC extension here, regardless of the --std
option in effect".


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