On 07/28/11 22:28, Paul Smith wrote:
On Thu, 2011-07-28 at 22:18 +0300, Angel Tsankov wrote:
Does anyone have an idea why 'make' ignores the exit status from any
commands that are run as part of variable expansion:
a=$(shell no-such-command)
b=$(shell false)
What do you think make should do with the exit status of these
operations? These are not run as part of any rule or target. I suppose
if it had been documented/worked since the beginning that non-0 exit
codes from the shell function would cause make to fail, that would have
been OK.
But I don't see any clear enough advantage to behaving that way to
justify a massively backward-incompatible change like that.
If 'make' does not fail on non-zero exit from a command (during variable
expansion) then we have no way to determine if the command completed
successfully (with empty output) or if it failed. This is my only concern.
A possible solution would be to introduce a new target (such as
.LOW_RESOLUTION_TIME) for this behavior.
Regards,
Angel Tsankov
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