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(g77-295.info)Uninitialized Variables at Run Time

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Uninitialized Variables at Run Time
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   `g77' needs an option to initialize everything (not otherwise
explicitly initialized) to "weird" (machine-dependent) values, e.g.
NaNs, bad (non-`NULL') pointers, and largest-magnitude integers, would
help track down references to some kinds of uninitialized variables at
run time.

   Note that use of the options `-O -Wuninitialized' can catch many
such bugs at compile time.