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First round of Kbuild fixes for 7.1

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- kbuild: builddeb - avoid recompiles for non-cross-compiles
 
     Avoid triggering complete rebuilds for non-cross-compile Debian
     package builds by only triggering the rebuild of host tools for
     actual cross-compile builds.
 
   - kbuild: Never respect CONFIG_WERROR / W=e to fixdep
 
     Avoid spurious rebuilds of fixdep w/ and w/o -Werror during a single
     kbuild invocation by never respecting CONFIG_WERROR for fixdep.
 
 Cc: Masahiro Yamada <masahiroy@kernel.org>
 Cc: Mathias Krause <minipli@grsecurity.net>
 Cc: Nathan Chancellor <nathan@kernel.org>
 Cc: Thomas Weißschuh <linux@weissschuh.net>
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Merge tag 'kbuild-fixes-7.1-1' of git://git.kernel.org/pub/scm/linux/kernel/git/kbuild/linux

Pull Kbuild fixes from Nicolas Schier:

 - builddeb - avoid recompiles for non-cross-compiles

   Avoid triggering complete rebuilds for non-cross-compile Debian
   package builds by only triggering the rebuild of host tools for
   actual cross-compile builds

 - Never respect CONFIG_WERROR / W=e to fixdep

   Avoid spurious rebuilds of fixdep w/ and w/o -Werror during a single
   kbuild invocation by never respecting CONFIG_WERROR for fixdep

* tag 'kbuild-fixes-7.1-1' of git://git.kernel.org/pub/scm/linux/kernel/git/kbuild/linux:
  kbuild: Never respect CONFIG_WERROR / W=e to fixdep
  kbuild: builddeb - avoid recompiles for non-cross-compiles
This commit is contained in:
Linus Torvalds 2026-04-25 17:04:15 -07:00
commit b935117fe6
2 changed files with 9 additions and 1 deletions
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2
Makefile
View File

@ -657,6 +657,8 @@ export RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \
# Basic helpers built in scripts/basic/
PHONY += scripts_basic
scripts_basic: KBUILD_HOSTCFLAGS := $(KBUILD_HOSTCFLAGS)
scripts_basic: KBUILD_HOSTLDFLAGS := $(KBUILD_HOSTLDFLAGS)
scripts_basic:
$(Q)$(MAKE) $(build)=scripts/basic

6
scripts/package/builddeb
View File

@ -139,7 +139,13 @@ install_kernel_headers () {
pdir=debian/$1
version=${1#linux-headers-}
# Override $CC only for cross-compiles, to not unnecessarily rebuild
# scripts/ including plugins, which may lead to a full kernel rebuild.
if [ -n "${CROSS_COMPILE}" ]; then
CC="${DEB_HOST_GNU_TYPE}-gcc" "${srctree}/scripts/package/install-extmod-build" "${pdir}/usr/src/linux-headers-${version}"
else
"${srctree}/scripts/package/install-extmod-build" "${pdir}/usr/src/linux-headers-${version}"
fi
mkdir -p $pdir/lib/modules/$version/
ln -s /usr/src/linux-headers-$version $pdir/lib/modules/$version/build