Openwrt/include/kernel-build.mk
Sebastian Kemper 2127accd44 build: create $(PKG_SYMVERS_DIR) if non-existent
Commit 5d76065 moved the creation of the symvers directory to
include/kernel-build.mk. This is fine when building from scratch. But
when unpacking an SDK the directory doesn't exist and because the kernel
won't be built (again) this directory will not be created by the build
system, causing build failure if make tries to copy files into it.

This moves the creation of the symvers directory back into
include/kernel.mk so that the directory is created in any case.

Signed-off-by: Sebastian Kemper <sebastian_ml@gmx.net>
2020-11-19 18:52:15 +01:00

186 lines
5.8 KiB
Makefile

#
# Copyright (C) 2006-2007 OpenWrt.org
#
# This is free software, licensed under the GNU General Public License v2.
# See /LICENSE for more information.
#
include $(INCLUDE_DIR)/prereq.mk
include $(INCLUDE_DIR)/depends.mk
ifneq ($(DUMP),1)
all: compile
endif
KERNEL_FILE_DEPENDS=$(GENERIC_BACKPORT_DIR) $(GENERIC_PATCH_DIR) $(GENERIC_HACK_DIR) $(PATCH_DIR) $(GENERIC_FILES_DIR) $(FILES_DIR)
STAMP_PREPARED=$(LINUX_DIR)/.prepared$(if $(QUILT)$(DUMP),,_$(shell $(call find_md5,$(KERNEL_FILE_DEPENDS),)))
STAMP_CONFIGURED:=$(LINUX_DIR)/.configured
include $(INCLUDE_DIR)/download.mk
include $(INCLUDE_DIR)/quilt.mk
include $(INCLUDE_DIR)/kernel-defaults.mk
define Kernel/Prepare
$(call Kernel/Prepare/Default)
endef
define Kernel/Configure
$(call Kernel/Configure/Default)
endef
define Kernel/CompileModules
$(call Kernel/CompileModules/Default)
endef
define Kernel/CompileImage
$(call Kernel/CompileImage/Default)
$(call Kernel/CompileImage/Initramfs)
endef
define Kernel/Clean
$(call Kernel/Clean/Default)
endef
define Download/kernel
URL:=$(LINUX_SITE)
FILE:=$(LINUX_SOURCE)
HASH:=$(LINUX_KERNEL_HASH)
endef
KERNEL_GIT_OPTS:=
ifneq ($(strip $(CONFIG_KERNEL_GIT_LOCAL_REPOSITORY)),"")
KERNEL_GIT_OPTS+=--reference $(CONFIG_KERNEL_GIT_LOCAL_REPOSITORY)
endif
define Download/git-kernel
URL:=$(call qstrip,$(CONFIG_KERNEL_GIT_CLONE_URI))
PROTO:=git
VERSION:=$(CONFIG_KERNEL_GIT_REF)
FILE:=$(LINUX_SOURCE)
SUBDIR:=linux-$(LINUX_VERSION)
OPTS:=$(KERNEL_GIT_OPTS)
endef
ifdef CONFIG_COLLECT_KERNEL_DEBUG
define Kernel/CollectDebug
rm -rf $(KERNEL_BUILD_DIR)/debug
mkdir -p $(KERNEL_BUILD_DIR)/debug/modules
$(CP) $(LINUX_DIR)/vmlinux $(KERNEL_BUILD_DIR)/debug/
-$(CP) \
$(STAGING_DIR_ROOT)/lib/modules/$(LINUX_VERSION)/* \
$(KERNEL_BUILD_DIR)/debug/modules/
$(FIND) $(KERNEL_BUILD_DIR)/debug -type f | $(XARGS) $(KERNEL_CROSS)strip --only-keep-debug
$(TAR) c -C $(KERNEL_BUILD_DIR) debug \
$(if $(SOURCE_DATE_EPOCH),--mtime="@$(SOURCE_DATE_EPOCH)") \
| zstd -T0 -f -o $(BIN_DIR)/kernel-debug.tar.zst
endef
endif
ifeq ($(DUMP)$(filter prereq clean refresh update,$(MAKECMDGOALS)),)
ifneq ($(if $(QUILT),,$(CONFIG_AUTOREBUILD)),)
define Kernel/Autoclean
$(PKG_BUILD_DIR)/.dep_files: $(STAMP_PREPARED)
$(call rdep,$(KERNEL_FILE_DEPENDS),$(STAMP_PREPARED),$(PKG_BUILD_DIR)/.dep_files,-x "*/.dep_*")
endef
endif
endif
define BuildKernel
$(if $(QUILT),$(Build/Quilt))
$(if $(LINUX_SITE),$(call Download,kernel))
$(if $(call qstrip,$(CONFIG_KERNEL_GIT_CLONE_URI)),$(call Download,git-kernel))
.NOTPARALLEL:
$(Kernel/Autoclean)
$(STAMP_PREPARED): $(if $(LINUX_SITE),$(DL_DIR)/$(LINUX_SOURCE))
-rm -rf $(KERNEL_BUILD_DIR)
-mkdir -p $(KERNEL_BUILD_DIR)
$(Kernel/Prepare)
touch $$@
$(KERNEL_BUILD_DIR)/symtab.h: FORCE
rm -f $(KERNEL_BUILD_DIR)/symtab.h
touch $(KERNEL_BUILD_DIR)/symtab.h
+$(KERNEL_MAKE) vmlinux
find $(LINUX_DIR) $(STAGING_DIR_ROOT)/lib/modules -name \*.ko | \
xargs $(TARGET_CROSS)nm | \
awk '$$$$1 == "U" { print $$$$2 } ' | \
sort -u > $(KERNEL_BUILD_DIR)/mod_symtab.txt
$(TARGET_CROSS)nm -n $(LINUX_DIR)/vmlinux.o | grep ' [rR] __ksymtab' | sed -e 's,........ [rR] __ksymtab_,,' > $(KERNEL_BUILD_DIR)/kernel_symtab.txt
grep -Ff $(KERNEL_BUILD_DIR)/mod_symtab.txt $(KERNEL_BUILD_DIR)/kernel_symtab.txt > $(KERNEL_BUILD_DIR)/sym_include.txt
grep -Fvf $(KERNEL_BUILD_DIR)/mod_symtab.txt $(KERNEL_BUILD_DIR)/kernel_symtab.txt > $(KERNEL_BUILD_DIR)/sym_exclude.txt
( \
echo '#define SYMTAB_KEEP \'; \
cat $(KERNEL_BUILD_DIR)/sym_include.txt | \
awk '{print "KEEP(*(___ksymtab+" $$$$1 ")) \\" }'; \
echo; \
echo '#define SYMTAB_KEEP_GPL \'; \
cat $(KERNEL_BUILD_DIR)/sym_include.txt | \
awk '{print "KEEP(*(___ksymtab_gpl+" $$$$1 ")) \\" }'; \
echo; \
echo '#define SYMTAB_DISCARD \'; \
cat $(KERNEL_BUILD_DIR)/sym_exclude.txt | \
awk '{print "*(___ksymtab+" $$$$1 ") \\" }'; \
echo; \
echo '#define SYMTAB_DISCARD_GPL \'; \
cat $(KERNEL_BUILD_DIR)/sym_exclude.txt | \
awk '{print "*(___ksymtab_gpl+" $$$$1 ") \\" }'; \
echo; \
) > $$@
$(STAMP_CONFIGURED): $(STAMP_PREPARED) $(LINUX_KCONFIG_LIST) $(TOPDIR)/.config FORCE
$(Kernel/Configure)
touch $$@
$(LINUX_DIR)/.modules: export STAGING_PREFIX=$$(STAGING_DIR_HOST)
$(LINUX_DIR)/.modules: export PKG_CONFIG_PATH=$$(STAGING_DIR_HOST)/lib/pkgconfig
$(LINUX_DIR)/.modules: export PKG_CONFIG_LIBDIR=$$(STAGING_DIR_HOST)/lib/pkgconfig
$(LINUX_DIR)/.modules: $(STAMP_CONFIGURED) $(LINUX_DIR)/.config FORCE
$(Kernel/CompileModules)
touch $$@
$(LINUX_DIR)/.image: export STAGING_PREFIX=$$(STAGING_DIR_HOST)
$(LINUX_DIR)/.image: export PKG_CONFIG_PATH=$$(STAGING_DIR_HOST)/lib/pkgconfig
$(LINUX_DIR)/.image: export PKG_CONFIG_LIBDIR=$$(STAGING_DIR_HOST)/lib/pkgconfig
$(LINUX_DIR)/.image: $(STAMP_CONFIGURED) $(if $(CONFIG_STRIP_KERNEL_EXPORTS),$(KERNEL_BUILD_DIR)/symtab.h) FORCE
$(Kernel/CompileImage)
$(Kernel/CollectDebug)
touch $$@
mostlyclean: FORCE
$(Kernel/Clean)
define BuildKernel
endef
download: $(if $(LINUX_SITE),$(DL_DIR)/$(LINUX_SOURCE))
prepare: $(STAMP_PREPARED)
compile: $(LINUX_DIR)/.modules
$(MAKE) -C image compile TARGET_BUILD=
oldconfig menuconfig nconfig xconfig: $(STAMP_PREPARED) $(STAMP_CHECKED) FORCE
rm -f $(LINUX_DIR)/.config.prev
rm -f $(STAMP_CONFIGURED)
$(LINUX_RECONF_CMD) > $(LINUX_DIR)/.config
$(_SINGLE)$(KERNEL_MAKE) \
$(if $(findstring Darwin,$(HOST_OS)), \
HOST_LOADLIBES="-L$(STAGING_DIR_HOST)/lib -lncurses" \
HOSTLDLIBS_mconf="-L$(STAGING_DIR_HOST)/lib -lncurses" \
filechk_conf_cfg=" :" \
) \
YACC=$(STAGING_DIR_HOST)/bin/bison \
$$@
$(call LINUX_RECONF_DIFF,$(LINUX_DIR)/.config) > $(LINUX_RECONFIG_TARGET)
install: $(LINUX_DIR)/.image
+$(MAKE) -C image compile install TARGET_BUILD=
clean: FORCE
rm -rf $(KERNEL_BUILD_DIR)
image-prereq:
@+$(NO_TRACE_MAKE) -s -C image prereq TARGET_BUILD=
prereq: image-prereq
endef