makefiles/docker: prevent recursive docker invocation #20638
Merged
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Contribution description
When
BUILD_IN_DOCKER ?= 1
is set as default in an application Makefile, the build system currently tries to invoke docker recursively from within docker.This PR adds
BUILD_IN_DOCKER=0
as environment variable to the docker invocation to explicitly disable recursive docker.Note that this approach still fails if the application Makefile contains an unconditional
BUILD_IN_DOCKER = 1
.Testing procedure
Apply the following patch and run
make -C examples/hello-world all
:On
master
, this fails with a recursive invocation of dockerWith this change, it builds successfully.
Issues/PRs references
Fixes #20636