adium/adium

Update build.sh to find the 10.6 SDK with Xcode 4.3. However, hardcode CC to gcc (from MacPorts).

Building at least GLib with clang never worked right for me.
#define AISimplifiedAssertEqualObjects(objectToTest, objectToExpect, message) \
STAssertEqualObjects((objectToTest), (objectToExpect), @"%s: %@: Expected %C%@%C; got %C%@%C", __PRETTY_FUNCTION__, message, /*open quote*/ 0x201C, (objectToExpect), /*close quote*/ 0x201D, /*open quote*/ 0x201C, (objectToTest), /*close quote*/ 0x201D);