Hey,

I am just starting to work on making 64-bit builds for Mac OS X. In the process I found a few compiler warnings that Apple added to gcc to help transition from 32-bit to 64-bit. I enabled it on the pd- extended nightly builds and got a ton of warnings. It seems like it would be worth checking out.

http://developer.apple.com/documentation/Darwin/Conceptual/64bitPorting/buil...

-Wconversion

Although not technically new for 64-bit architectures, this option is mostly useful when transitioning 32-bit code to 64-bit. This flag causes additional warnings to be printed when certain conversions occur between data types of different sizes. Most of these warnings will not be useful, so you should not necessarily fix everything that generates a warning with this flag. However, you may sometimes find this flag useful for tracking down hard-to-find edge cases.

In particular, this flag can also help track down edge cases in which a series of legal conversions result in an illegal conversion. For example, with this flag, the compiler will issue a warning if you assign a pointer to a 64-bit integer, pass that pointer into a 32-bit function argument, and subsequently convert the 64-bit function result back into a pointer.

-Wshorten-64-to-32

This flag is like -Wconversion, but is specific to 64-bit data types. This flag causes GCC to issue a warning whenever a value is implicitly converted (truncated) from a 64-bit type to a 32-bit type. You should fix any warnings generated by this flag, as they are likely to be bugs.

.hc

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