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Fix Configure's csym test for gcc's link time optimisation
authorH.Merijn Brand <h.m.brand@xs4all.nl>
Mon, 22 Aug 2011 13:41:26 +0000 (15:41 +0200)
committerH.Merijn Brand <h.m.brand@xs4all.nl>
Mon, 22 Aug 2011 13:41:26 +0000 (15:41 +0200)
This introduces a volatile into the test program so gcc cannot optimise
out the symbol itself as being unused.


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