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e29fa95b83
Unextected error in the br2-external script are properly caught, but
they are not reported properly, and we end up in either of two
situations:
- the .br2-external.mk file is not generated, in which case make will
try to find a rule to generate it (because the 'include' directive
tries to generate missing files);
- the .br-external.mk file is generated but does not contain the error
variable, and thus the build might not get interrupted.
We fix that by using a trap on the pseudo ERR signal, to emit the error
variable on unexpected errors.
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
(cherry picked from commit c5fa9308ea)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>