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47fca011b8
Using exit() requires stdlib.h, which is not included. Use return instead. Also add return type for main(). This back-patches commit 1c0cf52b3 into out-of-support branches, pursuant to a newly-established project policy that we'll try to keep out-of-support branches buildable on modern platforms for at least ten major releases back, ensuring people can test pg_dump and psql compatibility against servers that far back. With the current development branch being v15, that works out to keeping 9.2 and up buildable as of today. This fix is needed to get through 'configure' when using recent macOS (and possibly other clang-based toolchains). It seems to be sufficient to get through 'check-world', although there are annoyances such as compiler warnings, which will be dealt with separately. Original patch by Peter Eisentraut Discussion: https://postgr.es/m/d0316012-ece7-7b7e-2d36-9c38cb77cb3b@enterprisedb.com