On Mon, May 11, 2009 at 12:04 AM, Ian Lance Taylor <iant@xxxxxxxxxx> wrote: > Mark Dickinson <dickinsm@xxxxxxxxx> writes: > >> Is there any gcc warning available that would >> warn about the following C code, which gives >> different results depending on the platform: > > -Wconversion Thanks. It's not quite what I was looking for, since it still doesn't give any warning on LP64 machines, and on ILP32 it's warning about the comparison rather than the arithmetic operation. But I guess I'll live. :) I suppose it doesn't really make sense for gcc to warn about possible problems on a platform different from the one it's targeting. This seems like the sort of thing that 3rd party static-analysis tools would do well, but the only one that I tried (splint) failed to parse the various non-standards-compliant systems header files, so never got as far as the code I was interested in... Mark
