linux-kernel - [RFC PATCH 1/1] kbuild: add Makefile.container with CONTAINER option

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Message-ID: <20251014094511.627258-2-gtucker@gtucker.io>
Date: Tue, 14 Oct 2025 11:45:11 +0200
From: Guillaume Tucker <gtucker@...cker.io>
To: Nathan Chancellor <nathan@...nel.org>,
	Nicolas Schier <nicolas.schier@...ux.dev>
Cc: Guillaume Tucker <gtucker@...cker.io>,
	Miguel Ojeda <ojeda@...nel.org>,
	rust-for-linux@...r.kernel.org,
	linux-kbuild@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	automated-testing@...ts.yoctoproject.org,
	Arnd Bergmann <arnd@...db.de>,
	workflows@...r.kernel.org,
	llvm@...ts.linux.dev
Subject: [RFC PATCH 1/1] kbuild: add Makefile.container with CONTAINER option

Add scripts/Makefile.container to wrap the make command in a container
using the CONTAINER= variable to specify the image name.  For example:

    make -f scripts/Makefile.container CONTAINER=korg-gcc defconfig

The container image name is entirely arbitrary and the container tool
may be Docker, Podman or any other compatible alternative specified by
the CONTAINER_COMMAND variable.  The default is set to docker for now.

Cc: Nathan Chancellor <nathan@...nel.org>
Cc: Miguel Ojeda <ojeda@...nel.org>
Link: https://lore.kernel.org/all/affb7aff-dc9b-4263-bbd4-a7965c19ac4e@gtucker.io/
Signed-off-by: Guillaume Tucker <gtucker@...cker.io>
---
 scripts/Makefile.container | 15 +++++++++++++++
 1 file changed, 15 insertions(+)
 create mode 100644 scripts/Makefile.container

diff --git a/scripts/Makefile.container b/scripts/Makefile.container
new file mode 100644
index 000000000000..711cf9188016
--- /dev/null
+++ b/scripts/Makefile.container
@@ -0,0 +1,15 @@
+# SPDX-License-Identifier: GPL-2.0
+
+ifeq ($(CONTAINER),)
+$(error "Usage: make CONTAINER=<container-image-name> [...]")
+endif
+CONTAINER_COMMAND ?= docker
+PHONY := __all
+
+__all:
+%:
+	@echo Running in $(CONTAINER_COMMAND) $(CONTAINER)
+	@$(CONTAINER_COMMAND) run -it -v $(PWD):/src -w /src \
+	$(CONTAINER) $(MAKE) \
+	$(subst CONTAINER=$(CONTAINER),,$(MAKEFLAGS)) \
+	$(GNUMAKEFLAGS) $(MAKECMDGOALS)
-- 
2.47.3