%global _hardened_build 1 not working?

[Richard Shaw]

I got two bug reports sent to me because -fPIE was not used and the
packages contain suid binaries.

I'm working on fixing it and I added %global _hardened_build 1 to my spec
files but the output of %{optflags} does not seem to be modified as the
packaging guidelines[1] suggest they should.

What am I doing wrong?

Thanks,
Richard

[1] http://fedoraproject.org/wiki/Packaging:Guidelines#PIE
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