/usr/include/AvailabilityMacros.h:108:14: warning: #warning Building for Intel with Mac OS X Deployment Target < 10.4 is invalid. GLStack.cpp:123:3: warning: #warning push/pop texture matrix has to be done per texunit

From the Gem build log on the Gem 10.6 machine, looks like the min version should be bumped to 10.4 by default. Or perhaps a better deal is to remove the -mmacosx-version-min=10.3 and let it use the platform it is built on as the min version. That's the default behavior.

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Terrorism is not an enemy. It cannot be defeated. It's a tactic. It's about as sensible to say we declare war on night attacks and expect we're going to win that war. We're not going to win the war on terrorism. - retired U.S. Army general, William Odom