Fix configure failures with Xcode12 #292
Merged
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Changes are needed because Xcode12 includes a default of
-Werror,-Wimplicit-function-declaration
which means thateven something like calling
exit(0);
is a compile failure if you haven't done a#include <stdlib.h>
first (as C99 requires, but most other compilers will just warn about)I don't know if the "long long reliability test 2" test which tries to provoke a crash on a particular gcc 3.3 build still
does what it was originally intended to do with my change. Of course, I doubt anyone has tried to use that compiler in years.
Fixes #290