I'm writing a Linux program that currently compiles and works fine on x86 and x86_64, and now I'm wondering if there's anything special I'll need to do to make it work on other architectures.

What I've heard is that for cross platform code I should:

• Don't assume anything about the size of a pointer, int or size_t
• Don't make assumptions about byte order (I don't do any bit shifting -- I assume gcc will optimize my power of two multiplication/division for me)
• Don't use assembly blocks (obvious)
• Make sure your libraries work (I'm using SQLite, libcurl and Boost, which all seem pretty cross-platform)

Is there anything else I need to worry about? I'm not currently targeting any other architectures, but I expect to support ARM at some point, and I figure I might as well make it work on any architecture if I can.

Also, regarding my second point about byte order, do I need to do anything special with text input? I read files with getline(), so it seems like that should be done automatically as well.