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Subject[PATCH v2 1/3] scripts/package/Makefile: put proper config in source tarball
It is widely known that one can build a kernel without a .config in the
source tree by setting KCONFIG_CONFIG equal to the actual configuration
file path.

When making a *-pkg target, make(1) prepares a source tarball and tries
to pack `.config' in there regardless of the value of KCONFIG_CONFIG,
failing spectacularly if .config is absent and packing the wrong config
if it exists.
Let's fix that by including whatever KCONFIG_CONFIG points to in the
archive under the traditional name `.config'.

We have to pass --absolute-names to tar, since it seems to trim the
paths of archive members first and only then consider --transform, which
breaks KCONFIG_CONFIG=../../some.config, as well as absolute paths.

Signed-off-by: Arseny Maslennikov <ar@cs.msu.ru>
---
scripts/package/Makefile | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/scripts/package/Makefile b/scripts/package/Makefile
index 2c6de21e5152..134cefee068d 100644
--- a/scripts/package/Makefile
+++ b/scripts/package/Makefile
@@ -27,7 +27,7 @@ KDEB_SOURCENAME ?= linux-$(KERNELRELEASE)
KBUILD_PKG_ROOTCMD ?="fakeroot -u"
export KDEB_SOURCENAME
# Include only those top-level files that are needed by make, plus the GPL copy
-TAR_CONTENT := $(KBUILD_ALLDIRS) .config .scmversion Makefile \
+TAR_CONTENT := $(KBUILD_ALLDIRS) $(KCONFIG_CONFIG) .scmversion Makefile \
Kbuild Kconfig COPYING $(wildcard localversion*)
MKSPEC := $(srctree)/scripts/package/mkspec

@@ -44,6 +44,7 @@ if test "$(objtree)" != "$(srctree)"; then \
fi ; \
$(srctree)/scripts/setlocalversion --save-scmversion; \
tar -cz $(RCS_TAR_IGNORE) -f $(2).tar.gz \
+ --absolute-names --transform 's:^$(KCONFIG_CONFIG)$$:.config:S' \
--transform 's:^:$(2)/:S' $(TAR_CONTENT) $(3); \
rm -f $(objtree)/.scmversion

--
2.20.1
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