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63ec90f182
In this workflow:
$ make ARCH=um defconfig && make ARCH=um -j8
[snip]
$ make ARCH=um mrproper
[snip]
$ make ARCH=um defconfig O=./build_um && make ARCH=um -j8 O=./build_um
[snip]
CC scripts/mod/empty.o
In file included from ../include/linux/types.h:6,
from ../include/linux/mod_devicetable.h:12,
from ../scripts/mod/devicetable-offsets.c:3:
../include/uapi/linux/types.h:5:10: fatal error: asm/types.h: No such file or directory
5 | #include <asm/types.h>
| ^~~~~~~~~~~~~
compilation terminated.
make[2]: *** [../scripts/Makefile.build💯 scripts/mod/devicetable-offsets.s] Error 1
make[2]: *** Waiting for unfinished jobs....
make[1]: *** [/home/iha/sdb/opensource/lkmp/linux-kselftest.git/Makefile:1140: prepare0] Error 2
make[1]: Leaving directory '/home/iha/sdb/opensource/lkmp/linux-kselftest.git/build_um'
make: *** [Makefile:180: sub-make] Error 2
The cause of the error was because arch/$(SUBARCH)/include/generated files
weren't properly cleaned by `make ARCH=um mrproper`.
Fixes: a788b2ed81 ("kbuild: check arch/$(SRCARCH)/include/generated before out-of-tree build")
Reported-by: Theodore Ts'o <tytso@mit.edu>
Suggested-by: Masahiro Yamada <masahiroy@kernel.org>
Signed-off-by: Vitor Massaru Iha <vitor@massaru.org>
Reviewed-by: Brendan Higgins <brendanhiggins@google.com>
Tested-by: Brendan Higgins <brendanhiggins@google.com>
Link: https://groups.google.com/forum/#!msg/kunit-dev/QmA27YEgEgI/hvS1kiz2CwAJ
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
150 lines
4.7 KiB
Makefile
150 lines
4.7 KiB
Makefile
#
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# This file is included by the global makefile so that you can add your own
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# architecture-specific flags and dependencies.
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#
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# Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
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# Licensed under the GPL
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#
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# select defconfig based on actual architecture
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ifeq ($(SUBARCH),x86)
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ifeq ($(shell uname -m),x86_64)
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KBUILD_DEFCONFIG := x86_64_defconfig
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else
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KBUILD_DEFCONFIG := i386_defconfig
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endif
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else
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KBUILD_DEFCONFIG := $(SUBARCH)_defconfig
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endif
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ARCH_DIR := arch/um
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OS := $(shell uname -s)
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# We require bash because the vmlinux link and loader script cpp use bash
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# features.
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SHELL := /bin/bash
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core-y += $(ARCH_DIR)/kernel/ \
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$(ARCH_DIR)/drivers/ \
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$(ARCH_DIR)/os-$(OS)/
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MODE_INCLUDE += -I$(srctree)/$(ARCH_DIR)/include/shared/skas
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HEADER_ARCH := $(SUBARCH)
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ifneq ($(filter $(SUBARCH),x86 x86_64 i386),)
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HEADER_ARCH := x86
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endif
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ifdef CONFIG_64BIT
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KBUILD_CFLAGS += -mcmodel=large
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endif
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HOST_DIR := arch/$(HEADER_ARCH)
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include $(ARCH_DIR)/Makefile-skas
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include $(HOST_DIR)/Makefile.um
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core-y += $(HOST_DIR)/um/
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SHARED_HEADERS := $(ARCH_DIR)/include/shared
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ARCH_INCLUDE := -I$(srctree)/$(SHARED_HEADERS)
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ARCH_INCLUDE += -I$(srctree)/$(HOST_DIR)/um/shared
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KBUILD_CPPFLAGS += -I$(srctree)/$(HOST_DIR)/um
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# -Dvmap=kernel_vmap prevents anything from referencing the libpcap.o symbol so
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# named - it's a common symbol in libpcap, so we get a binary which crashes.
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#
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# Same things for in6addr_loopback and mktime - found in libc. For these two we
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# only get link-time error, luckily.
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#
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# -Dlongjmp=kernel_longjmp prevents anything from referencing the libpthread.a
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# embedded copy of longjmp, same thing for setjmp.
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#
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# These apply to USER_CFLAGS to.
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KBUILD_CFLAGS += $(CFLAGS) $(CFLAGS-y) -D__arch_um__ \
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$(ARCH_INCLUDE) $(MODE_INCLUDE) -Dvmap=kernel_vmap \
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-Dlongjmp=kernel_longjmp -Dsetjmp=kernel_setjmp \
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-Din6addr_loopback=kernel_in6addr_loopback \
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-Din6addr_any=kernel_in6addr_any -Dstrrchr=kernel_strrchr
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KBUILD_AFLAGS += $(ARCH_INCLUDE)
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USER_CFLAGS = $(patsubst $(KERNEL_DEFINES),,$(patsubst -I%,,$(KBUILD_CFLAGS))) \
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$(ARCH_INCLUDE) $(MODE_INCLUDE) $(filter -I%,$(CFLAGS)) \
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-D_FILE_OFFSET_BITS=64 -idirafter $(srctree)/include \
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-idirafter $(objtree)/include -D__KERNEL__ -D__UM_HOST__
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#This will adjust *FLAGS accordingly to the platform.
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include $(ARCH_DIR)/Makefile-os-$(OS)
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KBUILD_CPPFLAGS += -I$(srctree)/$(HOST_DIR)/include \
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-I$(srctree)/$(HOST_DIR)/include/uapi \
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-I$(objtree)/$(HOST_DIR)/include/generated \
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-I$(objtree)/$(HOST_DIR)/include/generated/uapi
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# -Derrno=kernel_errno - This turns all kernel references to errno into
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# kernel_errno to separate them from the libc errno. This allows -fno-common
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# in KBUILD_CFLAGS. Otherwise, it would cause ld to complain about the two different
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# errnos.
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# These apply to kernelspace only.
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#
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# strip leading and trailing whitespace to make the USER_CFLAGS removal of these
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# defines more robust
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KERNEL_DEFINES = $(strip -Derrno=kernel_errno -Dsigprocmask=kernel_sigprocmask \
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-Dmktime=kernel_mktime $(ARCH_KERNEL_DEFINES))
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KBUILD_CFLAGS += $(KERNEL_DEFINES)
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PHONY += linux
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all: linux
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linux: vmlinux
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@echo ' LINK $@'
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$(Q)ln -f $< $@
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define archhelp
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echo '* linux - Binary kernel image (./linux) - for backward'
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echo ' compatibility only, this creates a hard link to the'
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echo ' real kernel binary, the "vmlinux" binary you'
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echo ' find in the kernel root.'
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endef
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archheaders:
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$(Q)$(MAKE) -f $(srctree)/Makefile ARCH=$(HEADER_ARCH) asm-generic archheaders
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archprepare:
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$(Q)$(MAKE) $(build)=$(HOST_DIR)/um include/generated/user_constants.h
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LINK-$(CONFIG_LD_SCRIPT_STATIC) += -static
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LINK-$(CONFIG_LD_SCRIPT_DYN) += -Wl,-rpath,/lib $(call cc-option, -no-pie)
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CFLAGS_NO_HARDENING := $(call cc-option, -fno-PIC,) $(call cc-option, -fno-pic,) \
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$(call cc-option, -fno-stack-protector,) \
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$(call cc-option, -fno-stack-protector-all,)
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# Options used by linker script
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export LDS_START := $(START)
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export LDS_ELF_ARCH := $(ELF_ARCH)
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export LDS_ELF_FORMAT := $(ELF_FORMAT)
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# The wrappers will select whether using "malloc" or the kernel allocator.
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LINK_WRAPS = -Wl,--wrap,malloc -Wl,--wrap,free -Wl,--wrap,calloc
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LD_FLAGS_CMDLINE = $(foreach opt,$(KBUILD_LDFLAGS),-Wl,$(opt))
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# Used by link-vmlinux.sh which has special support for um link
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export CFLAGS_vmlinux := $(LINK-y) $(LINK_WRAPS) $(LD_FLAGS_CMDLINE)
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# When cleaning we don't include .config, so we don't include
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# TT or skas makefiles and don't clean skas_ptregs.h.
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CLEAN_FILES += linux x.i gmon.out
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MRPROPER_DIRS += arch/$(SUBARCH)/include/generated
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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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export HEADER_ARCH SUBARCH USER_CFLAGS CFLAGS_NO_HARDENING OS DEV_NULL_PATH
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