How does one determine the exit status of the shell forked by $(shell ...)? I
see nothing about it in the 3.81 online manual. I need to run a command for
which the null string is a perfectly reasonable output value, so I can't get
away with anything like this:
foo := $(shell mycommand)
ifeq($foo),)
<code to handle error conditions>
endif
And I don't just need to abort on error either. If the command fails I have
another (much slower) way to get the data whereas if it succeeds with null
output I want to continue on happily. Which means I need exit status. Is this
an oversight in the spec?
Thanks,
David Boyce
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