Provide error hint on exit() check when building libpq
Commit
dc227eb82 introduced a restriction on libpq that no functions which
invoke exit() are allowed to be called. This was further refined and fixed
in
e45b0dfa1f and
2f7bae2f92 and
792259591. While this is well documented
in the Makefile, the error message emitted when the check failed was terse,
without hints for new developers without prior context. This adds an error
hint to assist new developers onboarding to postgres.
Author: Rachel Heaton <rheaton@vmware.com>
Co-authored-by: Jacob Champion <pchampion@vmware.com>
Discussion: https://postgr.es/m/CADJcwiVL20955HCNzDqz9BEDr6A77pz6-nac5sbZVvhAEMijLg@mail.gmail.com