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diff --git a/doc/gawktexi.in b/doc/gawktexi.in index 991136c3..dde1aed2 100644 --- a/doc/gawktexi.in +++ b/doc/gawktexi.in @@ -29049,6 +29049,17 @@ $ @kbd{gawk -f case_fold_compare.awk} @print{} n N O o p P Q q r R S s t T u U V v w W X x y Y z Z @end example +@quotation NOTE +`Under the hood,'' @command{gawk} uses the C library @code{qsort()} +function to manage the sorting. @code{qsort()} can call itself +recursively. This means that when you write a comparison function, +you should be careful to avoid the use of global variables and arrays; +use only local variables and arrays that you declare as additional +parameters to the comparison function. Otherwise, you are likely to +cause unintentional memory corruption in your global arrays and possibly +cause @command{gawk} itself to fail. +@end quotation + @node Two-way I/O @section Two-Way Communications with Another Process |