Re: bizarre warnings

[Jeffrey A Law <law at cygnus dot com>]

  In message <199809070157.VAA28076@aloha.cc.columbia.edu>you write:
  > While trying to make some code compile cleanly with -W -Wall I got some
  > warnings I've never seen before.
  > 
  > t-coverage/string-test.inc:314: warning: unsigned value < 0 is always 0
  > t-coverage/string-test.inc:346: warning: unsigned value >= 0 is always 1
  > 
  > These are valid from the compiler's point of view, but the code is correct
  > (it's testing corner cases in a complicated macro).  Is there a
  > -Wno-something switch that kills these and *only* these warnings?
Don't know off the top of my head.  You might look at the gcc manual
since it should list all the warning options.


  > t-coverage/libm-test.inc:2382: warning: overflow on truncation to integer
  > t-coverage/libm-test.inc:6212: warning:  ediv invalid operation error
The ediv warning is due to 0/0 or inf/inf.

The overflow on truncation means there's a floating point number that
can not be represented with an int because it is too big.

jeff