8afc66e8d4
Pull Kbuild updates from Masahiro Yamada: - Remove potentially incomplete targets when Kbuid is interrupted by SIGINT etc in case GNU Make may miss to do that when stderr is piped to another program. - Rewrite the single target build so it works more correctly. - Fix rpm-pkg builds with V=1. - List top-level subdirectories in ./Kbuild. - Ignore auto-generated __kstrtab_* and __kstrtabns_* symbols in kallsyms. - Avoid two different modules in lib/zstd/ having shared code, which potentially causes building the common code as build-in and modular back-and-forth. - Unify two modpost invocations to optimize the build process. - Remove head-y syntax in favor of linker scripts for placing particular sections in the head of vmlinux. - Bump the minimal GNU Make version to 3.82. - Clean up misc Makefiles and scripts. * tag 'kbuild-v6.1' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (41 commits) docs: bump minimal GNU Make version to 3.82 ia64: simplify esi object addition in Makefile Revert "kbuild: Check if linker supports the -X option" kbuild: rebuild .vmlinux.export.o when its prerequisite is updated kbuild: move modules.builtin(.modinfo) rules to Makefile.vmlinux_o zstd: Fixing mixed module-builtin objects kallsyms: ignore __kstrtab_* and __kstrtabns_* symbols kallsyms: take the input file instead of reading stdin kallsyms: drop duplicated ignore patterns from kallsyms.c kbuild: reuse mksysmap output for kallsyms mksysmap: update comment about __crc_* kbuild: remove head-y syntax kbuild: use obj-y instead extra-y for objects placed at the head kbuild: hide error checker logs for V=1 builds kbuild: re-run modpost when it is updated kbuild: unify two modpost invocations kbuild: move vmlinux.o rule to the top Makefile kbuild: move .vmlinux.objs rule to Makefile.modpost kbuild: list sub-directories in ./Kbuild Makefile.compiler: replace cc-ifversion with compiler-specific macros ...
100 lines
2.5 KiB
Makefile
100 lines
2.5 KiB
Makefile
# SPDX-License-Identifier: GPL-2.0
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#
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# Kbuild for top-level directory of the kernel
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# Prepare global headers and check sanity before descending into sub-directories
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# ---------------------------------------------------------------------------
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# Generate bounds.h
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bounds-file := include/generated/bounds.h
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targets := kernel/bounds.s
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$(bounds-file): kernel/bounds.s FORCE
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$(call filechk,offsets,__LINUX_BOUNDS_H__)
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# Generate timeconst.h
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timeconst-file := include/generated/timeconst.h
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filechk_gentimeconst = echo $(CONFIG_HZ) | bc -q $<
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$(timeconst-file): kernel/time/timeconst.bc FORCE
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$(call filechk,gentimeconst)
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# Generate asm-offsets.h
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offsets-file := include/generated/asm-offsets.h
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targets += arch/$(SRCARCH)/kernel/asm-offsets.s
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arch/$(SRCARCH)/kernel/asm-offsets.s: $(timeconst-file) $(bounds-file)
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$(offsets-file): arch/$(SRCARCH)/kernel/asm-offsets.s FORCE
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$(call filechk,offsets,__ASM_OFFSETS_H__)
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# Check for missing system calls
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quiet_cmd_syscalls = CALL $<
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cmd_syscalls = $(CONFIG_SHELL) $< $(CC) $(c_flags) $(missing_syscalls_flags)
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PHONY += missing-syscalls
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missing-syscalls: scripts/checksyscalls.sh $(offsets-file)
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$(call cmd,syscalls)
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# Check the manual modification of atomic headers
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quiet_cmd_check_sha1 = CHKSHA1 $<
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cmd_check_sha1 = \
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if ! command -v sha1sum >/dev/null; then \
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echo "warning: cannot check the header due to sha1sum missing"; \
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exit 0; \
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fi; \
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if [ "$$(sed -n '$$s:// ::p' $<)" != \
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"$$(sed '$$d' $< | sha1sum | sed 's/ .*//')" ]; then \
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echo "error: $< has been modified." >&2; \
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exit 1; \
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fi; \
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touch $@
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atomic-checks += $(addprefix $(obj)/.checked-, \
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atomic-arch-fallback.h \
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atomic-instrumented.h \
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atomic-long.h)
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targets += $(atomic-checks)
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$(atomic-checks): $(obj)/.checked-%: include/linux/atomic/% FORCE
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$(call if_changed,check_sha1)
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# A phony target that depends on all the preparation targets
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PHONY += prepare
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prepare: $(offsets-file) missing-syscalls $(atomic-checks)
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@:
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# Ordinary directory descending
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# ---------------------------------------------------------------------------
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obj-y += init/
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obj-y += usr/
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obj-y += arch/$(SRCARCH)/
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obj-y += $(ARCH_CORE)
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obj-y += kernel/
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obj-y += certs/
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obj-y += mm/
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obj-y += fs/
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obj-y += ipc/
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obj-y += security/
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obj-y += crypto/
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obj-$(CONFIG_BLOCK) += block/
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obj-$(CONFIG_IO_URING) += io_uring/
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obj-$(CONFIG_RUST) += rust/
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obj-y += $(ARCH_LIB)
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obj-y += drivers/
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obj-y += sound/
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obj-$(CONFIG_SAMPLES) += samples/
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obj-$(CONFIG_NET) += net/
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obj-y += virt/
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obj-y += $(ARCH_DRIVERS)
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