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[bug #63070] posix_spawn fails to run a child process.

From: anonymous
Subject: [bug #63070] posix_spawn fails to run a child process.
Date: Sat, 17 Sep 2022 01:11:38 -0400 (EDT)

Follow-up Comment #2, bug #63070 (project make):

No, if posix_spawn() returns zero then then errno's value is unspecified and
any checks against it are invalid resulting in false positives.If some
versions of glibc have posix_spawn() return 0 when they did not create the
target process then the configure script needs to check for that and not use
that broken implementation.  Otherwise, the result will be double invocations
on correct systems.

NEVER test errno after a function returned success!


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