When a br2-external tree has an issue, e.g. a missing file, or does not
have a name, or the name uses invalid chars, we report that condition by
setting the variable BR2_EXTERNAL_ERROR.
That variable is defined in the script support/scripts/br2-external,
which outputs it on stdout, and checked by the Makefile.
Before d027cd75d0, stdout was explicitly redirected to the generated
.mk file, with exec >"${ofile}" as the Makefile and Kconfig
fragments were generated each with their own call to the script, and
the validation phase would emit the BR2_EXTERNAL_ERROR variable in the
Makefile fragment.
But with d027cd75d0, both the Makefile and Kconfig fragments were now
generated with a single call to the script, and as such the semantics of
the scripts changed, and only each of the actual generators, do_mk and
do_kconfig, had their out put redirected. Which left do_validate with
the default stdout. Which would emit BR2_EXTERNAL_ERROR on stdout.
In turn, the stdout of the script would be interpreted by as part of the
Makefile. But this does not end up very well when a br2-external tree
indeed has an error:
- missing a external.desc file:
Makefile:184: *** multiple target patterns. Stop.
- empty external.desc file:
Config.in:22: can't open file "output/.br2-external.in.paths"
So we must redirect the output of the validation step to the
Makefile fragment, so that the error message is correctly caught by the
top-level Makefile.
Note that we don't need to append in do_mk, and we can do an overwrite
redirection: if we go so far as to call do_mk, it means there was no
error, and thus the fragment is empty.
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
Reviewed-by: Romain Naour <romain.naour@gmail.com>
Tested-by: Romain Naour <romain.naour@gmail.com>
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