include/kernel.mk: build kmod packages with empty FILES
[openwrt/openwrt.git] / include / kernel.mk
index a0f256b..c169550 100644 (file)
-# 
-# Copyright (C) 2006 OpenWrt.org
+#
+# Copyright (C) 2006-2015 OpenWrt.org
 #
 # This is free software, licensed under the GNU General Public License v2.
 # See /LICENSE for more information.
 #
 
-include $(INCLUDE_DIR)/kernel-version.mk
+ifneq ($(filter check,$(MAKECMDGOALS)),)
+CHECK:=1
+DUMP:=1
+endif
+
+ifneq ($(SOURCE_DATE_EPOCH),)
+  ifndef DUMP
+    KBUILD_BUILD_TIMESTAMP:=$(shell perl -e 'print scalar gmtime($(SOURCE_DATE_EPOCH))')
+  endif
+endif
+
+ifeq ($(__target_inc),)
+  ifndef CHECK
+    include $(INCLUDE_DIR)/target.mk
+  endif
+endif
 
 ifeq ($(DUMP),1)
   KERNEL?=<KERNEL>
   BOARD?=<BOARD>
   LINUX_VERSION?=<LINUX_VERSION>
+  LINUX_VERMAGIC?=<LINUX_VERMAGIC>
 else
-  include $(INCLUDE_DIR)/target.mk
-
-  export GCC_HONOUR_COPTS=s
-
-  ifeq ($(KERNEL),2.6)
-    LINUX_KMOD_SUFFIX=ko
-  else
-    LINUX_KMOD_SUFFIX=o
+  ifeq ($(CONFIG_EXTERNAL_TOOLCHAIN),)
+    export GCC_HONOUR_COPTS=s
   endif
 
+  LINUX_KMOD_SUFFIX=ko
+
   ifneq (,$(findstring uml,$(BOARD)))
-    KERNEL_CC:=$(HOSTCC)
-    KERNEL_CROSS:=
+    KERNEL_CC?=$(HOSTCC)
+    KERNEL_CROSS?=
   else
-    KERNEL_CC:=$(TARGET_CC)
-    KERNEL_CROSS:=$(TARGET_CROSS)
+    KERNEL_CC?=$(TARGET_CC)
+    KERNEL_CROSS?=$(TARGET_CROSS)
   endif
 
-  PLATFORM_DIR := $(TOPDIR)/target/linux/$(BOARD)-$(KERNEL)
-  PATCH_DIR ?= ./patches$(shell [ -d "./patches-$(KERNEL_PATCHVER)" ] && printf -- "-$(KERNEL_PATCHVER)" || true )
-  KERNEL_BUILD_DIR ?= $(BUILD_DIR_BASE)/linux-$(KERNEL)-$(BOARD)$(if $(BUILD_SUFFIX),_$(BUILD_SUFFIX))
+  ifeq ($(TARGET_BUILD),1)
+    PATCH_DIR ?= $(CURDIR)/patches$(if $(wildcard ./patches-$(KERNEL_PATCHVER)),-$(KERNEL_PATCHVER))
+    FILES_DIR ?= $(foreach dir,$(wildcard $(CURDIR)/files $(CURDIR)/files-$(KERNEL_PATCHVER)),"$(dir)")
+  endif
+  KERNEL_BUILD_DIR ?= $(BUILD_DIR)/linux-$(BOARD)$(if $(SUBTARGET),_$(SUBTARGET))
   LINUX_DIR ?= $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION)
+  LINUX_UAPI_DIR=uapi/
+  LINUX_VERMAGIC:=$(strip $(shell cat $(LINUX_DIR)/.vermagic 2>/dev/null))
+  LINUX_VERMAGIC:=$(if $(LINUX_VERMAGIC),$(LINUX_VERMAGIC),unknown)
 
-  MODULES_SUBDIR:=lib/modules/$(LINUX_VERSION)
-  TARGET_MODULES_DIR := $(LINUX_TARGET_DIR)/$(MODULES_SUBDIR)
+  LINUX_UNAME_VERSION:=$(KERNEL_BASE)
+  ifneq ($(findstring -rc,$(LINUX_VERSION)),)
+    LINUX_UNAME_VERSION:=$(LINUX_UNAME_VERSION)-$(strip $(lastword $(subst -, ,$(LINUX_VERSION))))
+  endif
 
   LINUX_KERNEL:=$(KERNEL_BUILD_DIR)/vmlinux
 
-  LINUX_SOURCE:=linux-$(LINUX_VERSION).tar.bz2
+  LINUX_SOURCE:=linux-$(LINUX_VERSION).tar.xz
   TESTING:=$(if $(findstring -rc,$(LINUX_VERSION)),/testing,)
-  LINUX_SITE:=@KERNEL/linux/kernel/v$(KERNEL)$(TESTING) \
+  ifeq ($(call qstrip,$(CONFIG_EXTERNAL_KERNEL_TREE))$(call qstrip,$(CONFIG_KERNEL_GIT_CLONE_URI)),)
+      LINUX_SITE:=@KERNEL/linux/kernel/v$(word 1,$(subst ., ,$(KERNEL_BASE))).x$(TESTING)
+  else
+      LINUX_UNAME_VERSION:=$(strip $(shell cat $(LINUX_DIR)/include/config/kernel.release 2>/dev/null))
+  endif
 
-  PKG_BUILD_DIR ?= $(KERNEL_BUILD_DIR)/$(PKG_NAME)$(if $(PKG_VERSION),-$(PKG_VERSION))
+  MODULES_SUBDIR:=lib/modules/$(LINUX_UNAME_VERSION)
+  TARGET_MODULES_DIR:=$(LINUX_TARGET_DIR)/$(MODULES_SUBDIR)
+
+  ifneq ($(TARGET_BUILD),1)
+    PKG_BUILD_DIR ?= $(KERNEL_BUILD_DIR)/$(PKG_NAME)$(if $(PKG_VERSION),-$(PKG_VERSION))
+  endif
+endif
+
+ifneq (,$(findstring uml,$(BOARD)))
+  LINUX_KARCH=um
+else ifneq (,$(findstring $(ARCH) , aarch64 aarch64_be ))
+  LINUX_KARCH := arm64
+else ifneq (,$(findstring $(ARCH) , arceb ))
+  LINUX_KARCH := arc
+else ifneq (,$(findstring $(ARCH) , armeb ))
+  LINUX_KARCH := arm
+else ifneq (,$(findstring $(ARCH) , mipsel mips64 mips64el ))
+  LINUX_KARCH := mips
+else ifneq (,$(findstring $(ARCH) , powerpc64 ))
+  LINUX_KARCH := powerpc
+else ifneq (,$(findstring $(ARCH) , sh2 sh3 sh4 ))
+  LINUX_KARCH := sh
+else ifneq (,$(findstring $(ARCH) , i386 x86_64 ))
+  LINUX_KARCH := x86
+else
+  LINUX_KARCH := $(ARCH)
 endif
-GENERIC_PLATFORM_DIR := $(TOPDIR)/target/linux/generic-$(KERNEL)
-GENERIC_PATCH_DIR := $(GENERIC_PLATFORM_DIR)/patches$(shell [ -d "$(GENERIC_PLATFORM_DIR)/patches-$(KERNEL_PATCHVER)" ] && printf -- "-$(KERNEL_PATCHVER)" || true )
 
+KERNEL_MAKE = $(MAKE) $(KERNEL_MAKEOPTS)
+
+KERNEL_MAKE_FLAGS := \
+       HOSTCFLAGS="$(HOST_CFLAGS) -Wall -Wmissing-prototypes -Wstrict-prototypes" \
+       CROSS_COMPILE="$(KERNEL_CROSS)" \
+       ARCH="$(LINUX_KARCH)" \
+       KBUILD_HAVE_NLS=no \
+       KBUILD_BUILD_USER="$(call qstrip,$(CONFIG_KERNEL_BUILD_USER))" \
+       KBUILD_BUILD_HOST="$(call qstrip,$(CONFIG_KERNEL_BUILD_DOMAIN))" \
+       KBUILD_BUILD_TIMESTAMP="$(KBUILD_BUILD_TIMESTAMP)" \
+       KBUILD_BUILD_VERSION="0" \
+       HOST_LOADLIBES="-L$(STAGING_DIR_HOST)/lib" \
+       CONFIG_SHELL="$(BASH)" \
+       $(if $(findstring c,$(OPENWRT_VERBOSE)),V=1,V='') \
+       $(if $(PKG_BUILD_ID),LDFLAGS_MODULE=--build-id=0x$(PKG_BUILD_ID)) \
+       cmd_syscalls=
+
+ifeq ($(call qstrip,$(CONFIG_EXTERNAL_KERNEL_TREE))$(call qstrip,$(CONFIG_KERNEL_GIT_CLONE_URI)),)
+  KERNEL_MAKE_FLAGS += \
+       KERNELRELEASE=$(LINUX_VERSION)
+endif
+
+KERNEL_MAKEOPTS := -C $(LINUX_DIR) $(KERNEL_MAKE_FLAGS)
+
+ifdef CONFIG_USE_SPARSE
+  KERNEL_MAKEOPTS += C=1 CHECK=$(STAGING_DIR_HOST)/bin/sparse
+endif
+
+PKG_EXTMOD_SUBDIRS ?= .
+
+define populate_module_symvers
+       @mkdir -p $(PKG_INFO_DIR)
+       cat /dev/null > $(PKG_INFO_DIR)/$(PKG_NAME).symvers; \
+       for subdir in $(PKG_EXTMOD_SUBDIRS); do \
+               cat $(PKG_INFO_DIR)/*.symvers 2>/dev/null > $(PKG_BUILD_DIR)/$$$$subdir/Module.symvers; \
+       done
+endef
+
+define collect_module_symvers
+       for subdir in $(PKG_EXTMOD_SUBDIRS); do \
+               grep -F $$$$(readlink -f $(PKG_BUILD_DIR)) $(PKG_BUILD_DIR)/$$$$subdir/Module.symvers >> $(PKG_BUILD_DIR)/Module.symvers.tmp; \
+       done; \
+       sort -u $(PKG_BUILD_DIR)/Module.symvers.tmp > $(PKG_BUILD_DIR)/Module.symvers; \
+       mv $(PKG_BUILD_DIR)/Module.symvers $(PKG_INFO_DIR)/$(PKG_NAME).symvers
+endef
+
+define KernelPackage/hooks
+  ifneq ($(PKG_NAME),kernel)
+    Hooks/Compile/Pre += populate_module_symvers
+    Hooks/Compile/Post += collect_module_symvers
+  endif
+  define KernelPackage/hooks
+  endef
+endef
 
 define KernelPackage/Defaults
   FILES:=
   AUTOLOAD:=
+  MODPARAMS:=
+  PKGFLAGS+=nonshared
 endef
 
+# 1: name
+# 2: install prefix
+# 3: module priority prefix
+# 4: required for boot
+# 5: module list
 define ModuleAutoLoad
-       export modules=; \
-       add_module() { \
-               mkdir -p $(2)/etc/modules.d; \
-               ( \
-                       for mod in $$$$$$$$2; do \
-                               getvar mod; \
-                       done \
-               ) > $(2)/etc/modules.d/$$$$$$$$1-$(1); \
-               modules="$$$$$$$${modules:+$$$$$$$$modules }$$$$$$$$1-$(1)"; \
-       }; \
-       $(3) \
-       if [ -n "$$$$$$$$modules" ]; then \
-               mkdir -p $(2)/etc/modules.d; \
-               echo "#!/bin/sh" > $(2)/CONTROL/postinst; \
-               echo "[ -z \"\$$$$$$$$IPKG_INSTROOT\" ] || exit 0" >> $(2)/CONTROL/postinst; \
-               echo ". /etc/functions.sh" >> $(2)/CONTROL/postinst; \
-               echo "load_modules $$$$$$$$modules" >> $(2)/CONTROL/postinst; \
-               chmod 0755 $(2)/CONTROL/postinst; \
-       fi
+  $(if $(5), \
+    mkdir -p $(2)/etc/modules.d; \
+    ($(foreach mod,$(5), \
+      echo "$(mod)$(if $(MODPARAMS.$(mod)), $(MODPARAMS.$(mod)),$(if $(MODPARAMS), $(MODPARAMS)))"; )) > $(2)/etc/modules.d/$(3)$(1); \
+    $(if $(4), \
+      mkdir -p $(2)/etc/modules-boot.d; \
+      ln -sf ../modules.d/$(3)$(1) $(2)/etc/modules-boot.d/;))
+endef
+
+ifeq ($(DUMP)$(TARGET_BUILD),)
+  -include $(LINUX_DIR)/.config
+endif
+
+define KernelPackage/depends
+  $(STAMP_BUILT): $(LINUX_DIR)/.config
+  define KernelPackage/depends
+  endef
 endef
 
 define KernelPackage
   NAME:=$(1)
   $(eval $(call Package/Default))
   $(eval $(call KernelPackage/Defaults))
   $(eval $(call KernelPackage/$(1)))
-  $(eval $(call KernelPackage/$(1)/$(KERNEL)))
-  $(eval $(call KernelPackage/$(1)/$(BOARD)-$(KERNEL)))
+  $(eval $(call KernelPackage/$(1)/$(BOARD)))
+  $(eval $(call KernelPackage/$(1)/$(BOARD)/$(if $(SUBTARGET),$(SUBTARGET),generic)))
 
   define Package/kmod-$(1)
     TITLE:=$(TITLE)
     SECTION:=kernel
     CATEGORY:=Kernel modules
     DESCRIPTION:=$(DESCRIPTION)
-    EXTRA_DEPENDS:=kernel (=$(LINUX_VERSION)-$(BOARD)-$(LINUX_RELEASE))
-    VERSION:=$(LINUX_VERSION)$(if $(PKG_VERSION),+$(PKG_VERSION))-$(BOARD)-$(if $(PKG_RELEASE),$(PKG_RELEASE),$(LINUX_RELEASE))
+    EXTRA_DEPENDS:=kernel (=$(LINUX_VERSION)-$(LINUX_RELEASE)-$(LINUX_VERMAGIC))
+    VERSION:=$(LINUX_VERSION)$(if $(PKG_VERSION),+$(PKG_VERSION))-$(if $(PKG_RELEASE),$(PKG_RELEASE),$(LINUX_RELEASE))
+    PKGFLAGS:=$(PKGFLAGS)
     $(call KernelPackage/$(1))
-    $(call KernelPackage/$(1)/$(KERNEL))
-    $(call KernelPackage/$(1)/$(BOARD)-$(KERNEL))
+    $(call KernelPackage/$(1)/$(BOARD))
+    $(call KernelPackage/$(1)/$(BOARD)/$(if $(SUBTARGET),$(SUBTARGET),generic))
   endef
 
+  ifdef KernelPackage/$(1)/conffiles
+    define Package/kmod-$(1)/conffiles
+$(call KernelPackage/$(1)/conffiles)
+    endef
+  endif
+
   ifdef KernelPackage/$(1)/description
     define Package/kmod-$(1)/description
 $(call KernelPackage/$(1)/description)
     endef
   endif
 
-  # check that all CONFIG_* symbols in $(KCONFIG) are set to 'm'
-  ifeq ($(filter-out m,$(foreach c,$(filter-out %=y %=n %=m,$(KCONFIG)),$(if $($(c)),$($(c)),n))),)
-    ifneq ($(strip $(FILES)),)
-      define Package/kmod-$(1)/install
-                 mkdir -p $$(1)/lib/modules/$(LINUX_VERSION)
-                 $(CP) -L $$(FILES) $$(1)/lib/modules/$(LINUX_VERSION)/
-                 $(call ModuleAutoLoad,$(1),$$(1),$(AUTOLOAD))
+  ifdef KernelPackage/$(1)/config
+    define Package/kmod-$(1)/config
+$(call KernelPackage/$(1)/config)
+    endef
+  endif
+
+  $(call KernelPackage/depends)
+  $(call KernelPackage/hooks)
+
+  ifneq ($(if $(filter-out %=y %=n %=m,$(KCONFIG)),$(filter m y,$(foreach c,$(filter-out %=y %=n %=m,$(KCONFIG)),$($(c)))),.),)
+    define Package/kmod-$(1)/install
+                 @for mod in $$(call version_filter,$$(FILES)); do \
+                       if grep -q "$$$$$$$${mod##$(LINUX_DIR)/}" "$(LINUX_DIR)/modules.builtin"; then \
+                               echo "NOTICE: module '$$$$$$$$mod' is built-in."; \
+                       elif [ -e $$$$$$$$mod ]; then \
+                               mkdir -p $$(1)/$(MODULES_SUBDIR) ; \
+                               $(CP) -L $$$$$$$$mod $$(1)/$(MODULES_SUBDIR)/ ; \
+                       else \
+                               echo "ERROR: module '$$$$$$$$mod' is missing." >&2; \
+                               exit 1; \
+                       fi; \
+                 done;
+                 $(call ModuleAutoLoad,$(1),$$(1),$(filter-out 0-,$(word 1,$(AUTOLOAD))-),$(filter-out 0,$(word 2,$(AUTOLOAD))),$(wordlist 3,99,$(AUTOLOAD)))
                  $(call KernelPackage/$(1)/install,$$(1))
+    endef
+  $(if $(CONFIG_PACKAGE_kmod-$(1)),
+    else
+      compile: $(1)-disabled
+      $(1)-disabled:
+               @echo "WARNING: kmod-$(1) is not available in the kernel config - generating empty package" >&2
+
+      define Package/kmod-$(1)/install
+               true
       endef
-    endif
+  )
   endif
   $$(eval $$(call BuildPackage,kmod-$(1)))
 
   $$(IPKG_kmod-$(1)): $$(wildcard $$(FILES))
 endef
 
+version_filter=$(if $(findstring @,$(1)),$(shell $(SCRIPT_DIR)/package-metadata.pl version_filter $(KERNEL_PATCHVER) $(1)),$(1))
+
+# 1: priority (optional)
+# 2: module list
+# 3: boot flag
 define AutoLoad
-  add_module $(1) "$(2)";
+  $(if $(1),$(1),0) $(if $(3),1,0) $(call version_filter,$(2))
 endef
 
+# 1: module list
+# 2: boot flag
+define AutoProbe
+  $(call AutoLoad,,$(1),$(2))
+endef
+
+version_field=$(if $(word $(1),$(2)),$(word $(1),$(2)),0)
+kernel_version_merge=$$(( ($(call version_field,1,$(1)) << 24) + ($(call version_field,2,$(1)) << 16) + ($(call version_field,3,$(1)) << 8) + $(call version_field,4,$(1)) ))
+
+ifdef DUMP
+  kernel_version_cmp=
+else
+  kernel_version_cmp=$(shell [ $(call kernel_version_merge,$(call split_version,$(2))) $(1) $(call kernel_version_merge,$(call split_version,$(3))) ] && echo 1 )
+endif
+
+CompareKernelPatchVer=$(if $(call kernel_version_cmp,-$(2),$(1),$(3)),1,0)
+
+kernel_patchver_gt=$(call kernel_version_cmp,-gt,$(KERNEL_PATCHVER),$(1))
+kernel_patchver_ge=$(call kernel_version_cmp,-ge,$(KERNEL_PATCHVER),$(1))
+kernel_patchver_eq=$(call kernel_version_cmp,-eq,$(KERNEL_PATCHVER),$(1))
+kernel_patchver_le=$(call kernel_version_cmp,-le,$(KERNEL_PATCHVER),$(1))
+kernel_patchver_lt=$(call kernel_version_cmp,-lt,$(KERNEL_PATCHVER),$(1))
+