I was stuck at the unsupported GCC error in building Dart on my Snow Leopard. The fix was simple - to remove the explicit version requirement, and let it use the system default. Hope it doesn’t break anything.

Unsupported compiler 'GCC 4.2' selected for architecture 'x86_64'

Basically we have to clear out all references to GCC 4.2 from


GCC_VERSION = 4.2;


to


GCC_VERSION = ""


Since this version has been references in a thousand places, a global search and replace was needed. I am inside the dart/ directory.

$ find . -name "*.pbxproj" -print -exec sed -i 's/GCC_VERSION = 4.2/GCC_VERSION = ""/g' {} \;

And ** BUILD SUCCEEDED **

Cool!