Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
Merge tag 'kbuild-fixes-v6.15' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild
Pull Kbuild fixes from Masahiro Yamada:
- Add proper pahole version dependency to CONFIG_GENDWARFKSYMS to avoid
module loading errors
- Fix UAPI header tests for the OpenRISC architecture
- Add dependency on the libdw package in Debian and RPM packages
- Disable -Wdefault-const-init-unsafe warnings on Clang
- Make "make clean ARCH=um" also clean the arch/x86/ directory
- Revert the use of -fmacro-prefix-map=, which causes issues with
debugger usability
* tag 'kbuild-fixes-v6.15' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild:
kbuild: fix typos "module.builtin" to "modules.builtin"
Revert "kbuild, rust: use -fremap-path-prefix to make paths relative"
Revert "kbuild: make all file references relative to source root"
kbuild: fix dependency on sorttable
init: remove unused CONFIG_CC_CAN_LINK_STATIC
um: let 'make clean' properly clean underlying SUBARCH as well
kbuild: Disable -Wdefault-const-init-unsafe
kbuild: rpm-pkg: Add (elfutils-devel or libdw-devel) to BuildRequires
kbuild: deb-pkg: Add libdw-dev:native to Build-Depends-Arch
usr/include: openrisc: don't HDRTEST bpf_perf_event.h
kbuild: Require pahole <v1.28 or >v1.29 with GENDWARFKSYMS on X86
+46
-12
+17
Documentation/kbuild/reproducible-builds.rst
+17
Documentation/kbuild/reproducible-builds.rst
···
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`KBUILD_BUILD_USER and KBUILD_BUILD_HOST`_ variables. If you are
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building from a git commit, you could use its committer address.
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Absolute filenames
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------------------
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When the kernel is built out-of-tree, debug information may include
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absolute filenames for the source files. This must be overridden by
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including the ``-fdebug-prefix-map`` option in the `KCFLAGS`_ variable.
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Depending on the compiler used, the ``__FILE__`` macro may also expand
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to an absolute filename in an out-of-tree build. Kbuild automatically
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uses the ``-fmacro-prefix-map`` option to prevent this, if it is
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supported.
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The Reproducible Builds web site has more information about these
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`prefix-map options`_.
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Generated files in source packages
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----------------------------------
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···
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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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.. _prefix-map options: https://reproducible-builds.org/docs/build-path/
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.. _Reproducible Builds project: https://reproducible-builds.org/
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.. _SOURCE_DATE_EPOCH: https://reproducible-builds.org/docs/source-date-epoch/
+1
-2
Makefile
+1
-2
Makefile
···
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# change __FILE__ to the relative path to the source directory
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ifdef building_out_of_srctree
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KBUILD_CPPFLAGS += $(call cc-option,-ffile-prefix-map=$(srcroot)/=)
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-
KBUILD_RUSTFLAGS += --remap-path-prefix=$(srcroot)/=
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KBUILD_CPPFLAGS += $(call cc-option,-fmacro-prefix-map=$(srcroot)/=)
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endif
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# include additional Makefiles when needed
+1
arch/um/Makefile
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arch/um/Makefile
···
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archclean:
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@find . \( -name '*.bb' -o -name '*.bbg' -o -name '*.da' \
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-o -name '*.gcov' \) -type f -print | xargs rm -f
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$(Q)$(MAKE) -f $(srctree)/Makefile ARCH=$(HEADER_ARCH) clean
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export HEADER_ARCH SUBARCH USER_CFLAGS CFLAGS_NO_HARDENING DEV_NULL_PATH
-5
init/Kconfig
-5
init/Kconfig
···
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default $(success,$(srctree)/scripts/cc-can-link.sh $(CC) $(CLANG_FLAGS) $(USERCFLAGS) $(USERLDFLAGS) $(m64-flag)) if 64BIT
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default $(success,$(srctree)/scripts/cc-can-link.sh $(CC) $(CLANG_FLAGS) $(USERCFLAGS) $(USERLDFLAGS) $(m32-flag))
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config CC_CAN_LINK_STATIC
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bool
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default $(success,$(srctree)/scripts/cc-can-link.sh $(CC) $(CLANG_FLAGS) $(USERCFLAGS) $(USERLDFLAGS) $(m64-flag) -static) if 64BIT
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default $(success,$(srctree)/scripts/cc-can-link.sh $(CC) $(CLANG_FLAGS) $(USERCFLAGS) $(USERLDFLAGS) $(m32-flag) -static)
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-
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# Fixed in GCC 14, 13.3, 12.4 and 11.5
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# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113921
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config GCC_ASM_GOTO_OUTPUT_BROKEN
+5
kernel/module/Kconfig
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kernel/module/Kconfig
···
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depends on !DEBUG_INFO_REDUCED && !DEBUG_INFO_SPLIT
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# Requires ELF object files.
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depends on !LTO
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# To avoid conflicts with the discarded __gendwarfksyms_ptr symbols on
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# X86, requires pahole before commit 47dcb534e253 ("btf_encoder: Stop
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# indexing symbols for VARs") or after commit 9810758003ce ("btf_encoder:
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# Verify 0 address DWARF variables are in ELF section").
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depends on !X86 || !DEBUG_INFO_BTF || PAHOLE_VERSION < 128 || PAHOLE_VERSION > 129
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help
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Calculate symbol versions from DWARF debugging information using
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gendwarfksyms. Requires DEBUG_INFO to be enabled.
+12
scripts/Makefile.extrawarn
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scripts/Makefile.extrawarn
···
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# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111219
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KBUILD_CFLAGS += $(call cc-disable-warning, format-overflow-non-kprintf)
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KBUILD_CFLAGS += $(call cc-disable-warning, format-truncation-non-kprintf)
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# Clang may emit a warning when a const variable, such as the dummy variables
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# in typecheck(), or const member of an aggregate type are not initialized,
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# which can result in unexpected behavior. However, in many audited cases of
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# the "field" variant of the warning, this is intentional because the field is
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# never used within a particular call path, the field is within a union with
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# other non-const members, or the containing object is not const so the field
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# can be modified via memcpy() / memset(). While the variable warning also gets
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# disabled with this same switch, there should not be too much coverage lost
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# because -Wuninitialized will still flag when an uninitialized const variable
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# is used.
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KBUILD_CFLAGS += $(call cc-disable-warning, default-const-init-unsafe)
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else
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# gcc inanely warns about local variables called 'main'
+2
-2
scripts/Makefile.vmlinux
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-2
scripts/Makefile.vmlinux
···
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endif
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ifdef CONFIG_BUILDTIME_TABLE_SORT
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vmlinux: scripts/sorttable
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$(vmlinux-final): scripts/sorttable
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endif
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# module.builtin.ranges
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# modules.builtin.ranges
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# ---------------------------------------------------------------------------
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ifdef CONFIG_BUILTIN_MODULE_RANGES
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__default: modules.builtin.ranges
+2
-2
scripts/Makefile.vmlinux_o
+2
-2
scripts/Makefile.vmlinux_o
···
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targets += vmlinux.o
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-
# module.builtin.modinfo
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# modules.builtin.modinfo
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# ---------------------------------------------------------------------------
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OBJCOPYFLAGS_modules.builtin.modinfo := -j .modinfo -O binary
···
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modules.builtin.modinfo: vmlinux.o FORCE
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$(call if_changed,objcopy)
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-
# module.builtin
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# modules.builtin
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# ---------------------------------------------------------------------------
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# The second line aids cases where multiple modules share the same object.
+1
scripts/package/kernel.spec
+1
scripts/package/kernel.spec
···
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Source2: diff.patch
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Provides: kernel-%{KERNELRELEASE}
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BuildRequires: bc binutils bison dwarves
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BuildRequires: (elfutils-devel or libdw-devel)
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BuildRequires: (elfutils-libelf-devel or libelf-devel) flex
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BuildRequires: gcc make openssl openssl-devel perl python3 rsync
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+1
-1
scripts/package/mkdebian
+1
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scripts/package/mkdebian
···
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Build-Depends: debhelper-compat (= 12)
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Build-Depends-Arch: bc, bison, flex,
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gcc-${host_gnu} <!pkg.${sourcename}.nokernelheaders>,
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kmod, libelf-dev:native,
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kmod, libdw-dev:native, libelf-dev:native,
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libssl-dev:native, libssl-dev <!pkg.${sourcename}.nokernelheaders>,
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python3:native, rsync
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Homepage: https://www.kernel.org/