From owner-freebsd-hackers@FreeBSD.ORG  Sun Jul 15 13:39:13 2012
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Date: Sun, 15 Jul 2012 06:39:06 -0700 (PDT)
From: Jakub Lach <jakub_lach@mailplus.pl>
To: freebsd-hackers@freebsd.org
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Subject: Clang '-g' unused warnings in FreeBSD (linking)
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Hello.

While this is old "bug" upstream:

http://llvm.org/bugs/show_bug.cgi?id=8611

http://llvm.org/bugs/show_bug.cgi?id=8630

Here, 

(FreeBSD clang version 3.1 (branches/release_31 156863) 20120523
Target: x86_64-unknown-freebsd9.0)

Passing -g during linking (which lot's of projects do by 
including CFLAGS in linking) I still get 

"clang: warning: argument unused during compilation: '-g'"

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