On May 27, 2008, at 4:50 PM, Todd Heberlein wrote:

The gotchas that I often run into are: (1) Changing an Objective-C file to an Objective-C++ object (by renaming it to a .mm file) often causes me to rename a lot of files to .mm, because if the Objective- C class definition has a C++ object in it, every source code file that includes that Objective-C class definition needs to be renamed to a .mm file;

The .mm suffix is not a necessity. You can also set GCC_INPUT_FILETYPE in Xcode or use -x objective-c++ as gcc argument and leave the file names as they are.

-Stefan
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