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Commit647b1bc

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Prevent passing gmake's environment variables down through pg_regress.
When we do "make install" to create a temp installation, we don't wantthat instance of make to try to communicate with any instance of makethat might be calling us. This is known to cause problems if theupper make has a -jN flag, and in principle could cause problems evenwithout that. Unset the relevant environment variables to prevent suchissues.Andres Freund
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‎src/test/regress/pg_regress.c

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@@ -791,6 +791,19 @@ initialize_environment(void)
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doputenv("PGPORT",s);
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}
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/*
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* GNU make stores some flags in the MAKEFLAGS environment variable to
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* pass arguments to its own children.If we are invoked by make,
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* that causes the make invoked by us to think its part of the make
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* task invoking us, and so it tries to communicate with the toplevel
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* make. Which fails.
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*
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* Unset the variable to protect against such problems. We also reset
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* MAKELEVEL to be certain the child doesn't notice the make above us.
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*/
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unsetenv("MAKEFLAGS");
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unsetenv("MAKELEVEL");
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/*
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* Adjust path variables to point into the temp-install tree
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*/

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