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From: "howarth at nitro dot med.uc.edu" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug bootstrap/50342] gcc/configure fails on Mac OS X Lion/Xcode 4.1 if building Ada
Date: Fri, 09 Sep 2011 14:39:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50342

Jack Howarth <howarth at nitro dot med.uc.edu> changed:

           What    |Removed                     |Added
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                 CC|                            |howarth at nitro dot
                   |                            |med.uc.edu

--- Comment #1 from Jack Howarth <howarth at nitro dot med.uc.edu> 2011-09-09 14:04:06 UTC ---
Apple's macports developers had similar comments in their recommendations for
porting to Lion...

http://lists.macosforge.org/pipermail/macports-dev/2011-July/015263.html

5) Building with a compiler that doesn't support newer __builtins

If your port uses MacPorts compilers rather than the default compiler, you may
run into trouble with string functions.  You'll see errors at link time about
undefined __builtin_* functions.  If this happens, you may want to compile with
-D_FORTIFY_SOURCE=0 to tell the headers to use unfortified versions which do
not use compiler builtins.