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H A DMakefilediff 2db2c250dd3d1e74a50d4ab5f44c44ca5cb4e42b Mon Mar 27 06:11:44 CEST 2017 Michael Ellerman <mpe@ellerman.id.au> selftests/powerpc: Fix standalone powerpc build

The changes to enable building with a separate output directory, in
commit a8ba798bc8ec ("selftests: enable O and KBUILD_OUTPUT") broke
building the powerpc selftests on their own, eg:

$ cd tools/testing/selftests/powerpc; make

It was partially fixed in commit e53aff45c490 ("selftests: lib.mk Fix
individual test builds"), which defined OUTPUT for standalone tests. But
that only defines OUTPUT within the Makefile, the value is not exported
so sub-shells can't see it. We could export OUTPUT, but it's actually
cleaner to just expand the value of OUTPUT before we invoke the shell.

Fixes: a8ba798bc8ec ("selftests: enable O and KBUILD_OUTPUT")
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>