Re: how to exit the parent_make immediately when get an error in submake

[Sam Ravnborg]

On Tue, Nov 25, 2008 at 08:51:38PM +0000, Greg Chicares wrote:
> On 2008-11-25 15:12Z, Tao T wrote:
> > for some reason it seems more complicated to get rid of shell.
> > do you have any suggestion to use shell? thanks~
> > currently my command have to change to :BUILDUNITS := $(shell $(foreach
> > unit,$(ALL_UNITS),cd $(REPOSITORY_ROOT)/units/$(unit)  && $(MAKE)
> > $(MAKECMDGOALS) BUILD_TYPE=$(BUILD_TYPE) 1>&2;))
> > It looks more complicated.
> 
> The original question was how to stop on the first error. That's
> the normal behavior of 'make'. But the $(shell) command simply
> passes a string to a shell, and 'make' doesn't know what that
> shell is doing until it returns. So, if you really want to use
> $(shell) this way, you have to write the command so that it
> stops on error. I guess you could write '&&' instead of ';', and
> do something about the last '&&', e.g. add 'true' at the end:
>   $(shell command0 && command1 && ... && command99 && true)

I usually uses "set -e; bla; bla" to exit on first error in a shell command.
That should work here too.

        Sam