Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
Merge tag 'kbuild-fixes-v6.1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild
Pull Kbuild fixes from Masahiro Yamada:
- Use POSIX-compatible grep options
- Document git-related tips for reproducible builds
- Fix a typo in the modpost rule
- Suppress SIGPIPE error message from gcc-ar and llvm-ar
- Fix segmentation fault in the menuconfig search
* tag 'kbuild-fixes-v6.1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild:
kconfig: fix segmentation fault in menuconfig search
kbuild: fix SIGPIPE error message for AR=gcc-ar and AR=llvm-ar
kbuild: fix typo in modpost
Documentation: kbuild: Add description of git for reproducible builds
kbuild: use POSIX-compatible grep option
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Documentation/kbuild/reproducible-builds.rst
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Documentation/kbuild/reproducible-builds.rst
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kernel versions by including an arbitrary string of "salt" in it.
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This is specified by the Kconfig symbol ``CONFIG_BUILD_SALT``.
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Git
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---
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Uncommitted changes or different commit ids in git can also lead
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to different compilation results. For example, after executing
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``git reset HEAD^``, even if the code is the same, the
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``include/config/kernel.release`` generated during compilation
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will be different, which will eventually lead to binary differences.
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See ``scripts/setlocalversion`` for details.
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.. _KBUILD_BUILD_TIMESTAMP: kbuild.html#kbuild-build-timestamp
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.. _KBUILD_BUILD_USER and KBUILD_BUILD_HOST: kbuild.html#kbuild-build-user-kbuild-build-host
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.. _KCFLAGS: kbuild.html#kcflags
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Makefile
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Makefile
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cmd_ar_vmlinux.a = \
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rm -f $@; \
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$(AR) cDPrST $@ $(KBUILD_VMLINUX_OBJS); \
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$(AR) mPiT $$($(AR) t $@ | head -n1) $@ $$($(AR) t $@ | grep -F --file=$(srctree)/scripts/head-object-list.txt)
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$(AR) mPiT $$($(AR) t $@ | sed -n 1p) $@ $$($(AR) t $@ | grep -F -f $(srctree)/scripts/head-object-list.txt)
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targets += vmlinux.a
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vmlinux.a: $(KBUILD_VMLINUX_OBJS) scripts/head-object-list.txt autoksyms_recursive FORCE
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scripts/Makefile.modpost
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scripts/Makefile.modpost
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sed 's/ko$$/o/' $(or $(modorder-if-needed), /dev/null) | $(MODPOST) $(modpost-args) -T - $(vmlinux.o-if-present)
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targets += $(output-symdump)
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$(output-symdump): $(modorder-if-needed) $(vmlinux.o-if-present) $(moudle.symvers-if-present) $(MODPOST) FORCE
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$(output-symdump): $(modorder-if-needed) $(vmlinux.o-if-present) $(module.symvers-if-present) $(MODPOST) FORCE
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$(call if_changed,modpost)
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__modpost: $(output-symdump)