Follow-up Comment #2, bug #57674 (project make):
I know why this happens.
In GNU make prior to 4.3 we used the execvp() system call to invoke commands.
This call behaves like this (from the man page):
> The file is sought in the colon-separated list of directory pathnames
> specified in the PATH environment variable. If this variable isn't
> defined, the path list defaults to a list that includes the directories
> returned by confstr(_CS_PATH) (which typically returns the value
> "/bin:/usr/bin")
In GNU make 4.3, for performance reasons we choose to use posix_spawn() if
it's available on the system. posix_spawn() doesn't do any path search, so we
do it ourselves and we don't have this backup default PATH lookup that
execvp() does.
While it could be argued either way, I think this is probably something we
should fix in GNU make so I'm going to leave this open.
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