rules.mk

   1 #
   2 # Copyright (C) 2006-2010 OpenWrt.org
   3 # Copyright (C) 2016 LEDE Project
   4 #
   5 # This is free software, licensed under the GNU General Public License v2.
   6 # See /LICENSE for more information.
   7 #
   8
   9 ifneq ($(__rules_inc),1)
  10 __rules_inc=1
  11
  12 ifeq ($(DUMP),)
  13   -include $(TOPDIR)/.config
  14 endif
  15 include $(TOPDIR)/include/debug.mk
  16 include $(TOPDIR)/include/verbose.mk
  17
  18 ifneq ($(filter check,$(MAKECMDGOALS)),)
  19 CHECK:=1
  20 DUMP:=1
  21 endif
  22
  23 export TMP_DIR:=$(TOPDIR)/tmp
  24 export TMPDIR:=$(TMP_DIR)
  25
  26 qstrip=$(strip $(subst ",,$(1)))
  27 #"))
  28
  29 empty:=
  30 space:= $(empty) $(empty)
  31 comma:=,
  32 merge=$(subst $(space),,$(1))
  33 confvar=$(shell echo '$(foreach v,$(1),$(v)=$(subst ','\'',$($(v))))' | $(STAGING_DIR_HOST)/bin/mkhash md5)
  34 strip_last=$(patsubst %.$(lastword $(subst .,$(space),$(1))),%,$(1))
  35
  36 paren_left = (
  37 paren_right = )
  38 chars_lower = a b c d e f g h i j k l m n o p q r s t u v w x y z
  39 chars_upper = A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
  40
  41 define sep
  42
  43 endef
  44
  45 define newline
  46
  47
  48 endef
  49
  50 __tr_list = $(join $(join $(1),$(foreach char,$(1),$(comma))),$(2))
  51 __tr_head_stripped = $(subst $(space),,$(foreach cv,$(call __tr_list,$(1),$(2)),$$$(paren_left)subst$(cv)$(comma)))
  52 __tr_head = $(subst $(paren_left)subst,$(paren_left)subst$(space),$(__tr_head_stripped))
  53 __tr_tail = $(subst $(space),,$(foreach cv,$(1),$(paren_right)))
  54 __tr_template = $(__tr_head)$$(1)$(__tr_tail)
  55
  56 $(eval toupper = $(call __tr_template,$(chars_lower),$(chars_upper)))
  57 $(eval tolower = $(call __tr_template,$(chars_upper),$(chars_lower)))
  58
  59 version_abbrev = $(if $(if $(CHECK),,$(DUMP)),$(1),$(shell printf '%.8s' $(1)))
  60
  61 _SINGLE=export MAKEFLAGS=$(space);
  62 CFLAGS:=
  63 ARCH:=$(subst i486,i386,$(subst i586,i386,$(subst i686,i386,$(call qstrip,$(CONFIG_ARCH)))))
  64 ARCH_PACKAGES:=$(call qstrip,$(CONFIG_TARGET_ARCH_PACKAGES))
  65 BOARD:=$(call qstrip,$(CONFIG_TARGET_BOARD))
  66 SUBTARGET:=$(call qstrip,$(CONFIG_TARGET_SUBTARGET))
  67 TARGET_OPTIMIZATION:=$(call qstrip,$(CONFIG_TARGET_OPTIMIZATION))
  68 export EXTRA_OPTIMIZATION:=$(filter-out -fno-plt,$(call qstrip,$(CONFIG_EXTRA_OPTIMIZATION)))
  69 TARGET_SUFFIX=$(call qstrip,$(CONFIG_TARGET_SUFFIX))
  70 BUILD_SUFFIX:=$(call qstrip,$(CONFIG_BUILD_SUFFIX))
  71 SUBDIR:=$(patsubst $(TOPDIR)/%,%,${CURDIR})
  72 BUILD_SUBDIR:=$(patsubst $(TOPDIR)/%,%,${CURDIR})
  73 export SHELL:=/usr/bin/env bash
  74
  75 IS_PACKAGE_BUILD := $(if $(filter package/%,$(BUILD_SUBDIR)),1)
  76
  77 OPTIMIZE_FOR_CPU=$(subst i386,i486,$(ARCH))
  78
  79 ifeq ($(ARCH),powerpc)
  80   FPIC:=-fPIC
  81 else
  82   FPIC:=-fpic
  83 endif
  84
  85 HOST_FPIC:=-fPIC
  86
  87 ARCH_SUFFIX:=$(call qstrip,$(CONFIG_CPU_TYPE))
  88 GCC_ARCH:=
  89
  90 ifneq ($(ARCH_SUFFIX),)
  91   ARCH_SUFFIX:=_$(ARCH_SUFFIX)
  92 endif
  93 ifneq ($(filter -march=armv%,$(TARGET_OPTIMIZATION)),)
  94   GCC_ARCH:=$(patsubst -march=%,%,$(filter -march=armv%,$(TARGET_OPTIMIZATION)))
  95 endif
  96 ifdef CONFIG_HAS_SPE_FPU
  97   TARGET_SUFFIX:=$(TARGET_SUFFIX)spe
  98 endif
  99 ifdef CONFIG_MIPS64_ABI
 100   ifneq ($(CONFIG_MIPS64_ABI_O32),y)
 101      ARCH_SUFFIX:=$(ARCH_SUFFIX)_$(call qstrip,$(CONFIG_MIPS64_ABI))
 102   endif
 103 endif
 104
 105 DEFAULT_SUBDIR_TARGETS:=clean download prepare compile update refresh prereq dist distcheck configure check check-depends
 106
 107 define DefaultTargets
 108 $(foreach t,$(DEFAULT_SUBDIR_TARGETS) $(1),
 109   .$(t):
 110   $(t): .$(t)
 111   .PHONY: $(t) .$(t)
 112 )
 113 endef
 114
 115 DL_DIR:=$(if $(call qstrip,$(CONFIG_DOWNLOAD_FOLDER)),$(call qstrip,$(CONFIG_DOWNLOAD_FOLDER)),$(TOPDIR)/dl)
 116 OUTPUT_DIR:=$(if $(call qstrip,$(CONFIG_BINARY_FOLDER)),$(call qstrip,$(CONFIG_BINARY_FOLDER)),$(TOPDIR)/bin)
 117 BIN_DIR:=$(OUTPUT_DIR)/targets/$(BOARD)/$(SUBTARGET)
 118 INCLUDE_DIR:=$(TOPDIR)/include
 119 SCRIPT_DIR:=$(TOPDIR)/scripts
 120 BUILD_DIR_BASE:=$(TOPDIR)/build_dir
 121 ifeq ($(CONFIG_EXTERNAL_TOOLCHAIN),)
 122   GCCV:=$(call qstrip,$(CONFIG_GCC_VERSION))
 123   LIBC:=$(call qstrip,$(CONFIG_LIBC))
 124   REAL_GNU_TARGET_NAME=$(OPTIMIZE_FOR_CPU)-openwrt-linux$(if $(TARGET_SUFFIX),-$(TARGET_SUFFIX))
 125   GNU_TARGET_NAME=$(OPTIMIZE_FOR_CPU)-openwrt-linux
 126   DIR_SUFFIX:=_$(LIBC)$(if $(CONFIG_arm),_eabi)
 127   BIN_DIR:=$(BIN_DIR)$(if $(CONFIG_USE_MUSL),,-$(LIBC))
 128   TARGET_DIR_NAME = target-$(ARCH)$(ARCH_SUFFIX)$(DIR_SUFFIX)$(if $(BUILD_SUFFIX),_$(BUILD_SUFFIX))
 129   TOOLCHAIN_DIR_NAME = toolchain-$(ARCH)$(ARCH_SUFFIX)_gcc-$(GCCV)$(DIR_SUFFIX)
 130 else
 131   ifeq ($(CONFIG_NATIVE_TOOLCHAIN),)
 132     GNU_TARGET_NAME=$(call qstrip,$(CONFIG_TARGET_NAME))
 133   else
 134     GNU_TARGET_NAME=$(shell gcc -dumpmachine)
 135   endif
 136   REAL_GNU_TARGET_NAME=$(GNU_TARGET_NAME)
 137   LIBC:=$(call qstrip,$(CONFIG_LIBC))
 138   TARGET_DIR_NAME:=target-$(GNU_TARGET_NAME)_$(LIBC)$(if $(BUILD_SUFFIX),_$(BUILD_SUFFIX))
 139   TOOLCHAIN_DIR_NAME:=toolchain-$(GNU_TARGET_NAME)
 140 endif
 141
 142 ifeq ($(or $(CONFIG_EXTERNAL_TOOLCHAIN),$(CONFIG_GCC_VERSION_4_8),$(CONFIG_TARGET_uml)),)
 143   iremap = -iremap$(1):$(2)
 144 endif
 145
 146 PACKAGE_DIR:=$(BIN_DIR)/packages
 147 PACKAGE_DIR_ALL:=$(TOPDIR)/staging_dir/packages/$(BOARD)
 148 BUILD_DIR:=$(BUILD_DIR_BASE)/$(TARGET_DIR_NAME)
 149 STAGING_DIR:=$(TOPDIR)/staging_dir/$(TARGET_DIR_NAME)
 150 BUILD_DIR_TOOLCHAIN:=$(BUILD_DIR_BASE)/$(TOOLCHAIN_DIR_NAME)
 151 TOOLCHAIN_DIR:=$(TOPDIR)/staging_dir/$(TOOLCHAIN_DIR_NAME)
 152 STAMP_DIR:=$(BUILD_DIR)/stamp
 153 STAMP_DIR_HOST=$(BUILD_DIR_HOST)/stamp
 154 TARGET_ROOTFS_DIR?=$(if $(call qstrip,$(CONFIG_TARGET_ROOTFS_DIR)),$(call qstrip,$(CONFIG_TARGET_ROOTFS_DIR)),$(BUILD_DIR))
 155 TARGET_DIR:=$(TARGET_ROOTFS_DIR)/root-$(BOARD)
 156 STAGING_DIR_ROOT:=$(STAGING_DIR)/root-$(BOARD)
 157 STAGING_DIR_IMAGE:=$(STAGING_DIR)/image
 158 BUILD_LOG_DIR:=$(TOPDIR)/logs
 159 PKG_INFO_DIR := $(STAGING_DIR)/pkginfo
 160
 161 BUILD_DIR_HOST:=$(if $(IS_PACKAGE_BUILD),$(BUILD_DIR_BASE)/hostpkg,$(BUILD_DIR_BASE)/host)
 162 STAGING_DIR_HOST:=$(TOPDIR)/staging_dir/host
 163 STAGING_DIR_HOSTPKG:=$(TOPDIR)/staging_dir/hostpkg
 164
 165 TARGET_PATH:=$(subst $(space),:,$(filter-out .,$(filter-out ./,$(subst :,$(space),$(PATH)))))
 166 TARGET_INIT_PATH:=$(call qstrip,$(CONFIG_TARGET_INIT_PATH))
 167 TARGET_INIT_PATH:=$(if $(TARGET_INIT_PATH),$(TARGET_INIT_PATH),/usr/sbin:/sbin:/usr/bin:/bin)
 168 TARGET_CFLAGS:=$(TARGET_OPTIMIZATION)$(if $(CONFIG_DEBUG), -g3) $(call qstrip,$(CONFIG_EXTRA_OPTIMIZATION))
 169 TARGET_CXXFLAGS = $(TARGET_CFLAGS)
 170 TARGET_ASFLAGS_DEFAULT = $(TARGET_CFLAGS)
 171 TARGET_ASFLAGS = $(TARGET_ASFLAGS_DEFAULT)
 172 TARGET_CPPFLAGS:=-I$(STAGING_DIR)/usr/include -I$(STAGING_DIR)/include
 173 TARGET_LDFLAGS:=-L$(STAGING_DIR)/usr/lib -L$(STAGING_DIR)/lib
 174 ifneq ($(CONFIG_EXTERNAL_TOOLCHAIN),)
 175 LIBGCC_S_PATH=$(realpath $(wildcard $(call qstrip,$(CONFIG_LIBGCC_ROOT_DIR))/$(call qstrip,$(CONFIG_LIBGCC_FILE_SPEC))))
 176 LIBGCC_S=$(if $(LIBGCC_S_PATH),-L$(dir $(LIBGCC_S_PATH)) -lgcc_s)
 177 LIBGCC_A=$(realpath $(lastword $(wildcard $(dir $(LIBGCC_S_PATH))/gcc/*/*/libgcc.a)))
 178 else
 179 LIBGCC_A=$(lastword $(wildcard $(TOOLCHAIN_DIR)/lib/gcc/*/*/libgcc.a))
 180 LIBGCC_S=$(if $(wildcard $(TOOLCHAIN_DIR)/lib/libgcc_s.so),-L$(TOOLCHAIN_DIR)/lib -lgcc_s,$(LIBGCC_A))
 181 endif
 182 LIBRPC=-lrpc
 183 LIBRPC_DEPENDS=+librpc
 184
 185 ifeq ($(CONFIG_ARCH_64BIT),y)
 186   LIB_SUFFIX:=64
 187 endif
 188
 189 ifndef DUMP
 190   ifeq ($(CONFIG_EXTERNAL_TOOLCHAIN),)
 191     -include $(TOOLCHAIN_DIR)/info.mk
 192     export GCC_HONOUR_COPTS:=0
 193     TARGET_CROSS:=$(if $(TARGET_CROSS),$(TARGET_CROSS),$(OPTIMIZE_FOR_CPU)-openwrt-linux$(if $(TARGET_SUFFIX),-$(TARGET_SUFFIX))-)
 194     TARGET_CFLAGS+= -fhonour-copts -Wno-error=unused-but-set-variable -Wno-error=unused-result
 195     TARGET_CPPFLAGS+= -I$(TOOLCHAIN_DIR)/usr/include
 196     ifeq ($(CONFIG_USE_MUSL),y)
 197       TARGET_CPPFLAGS+= -I$(TOOLCHAIN_DIR)/include/fortify
 198     endif
 199     TARGET_CPPFLAGS+= -I$(TOOLCHAIN_DIR)/include
 200     TARGET_LDFLAGS+= -L$(TOOLCHAIN_DIR)/usr/lib -L$(TOOLCHAIN_DIR)/lib
 201     TARGET_PATH:=$(TOOLCHAIN_DIR)/bin:$(TARGET_PATH)
 202   else
 203     ifeq ($(CONFIG_NATIVE_TOOLCHAIN),)
 204       TARGET_CROSS:=$(call qstrip,$(CONFIG_TOOLCHAIN_PREFIX))
 205       TOOLCHAIN_ROOT_DIR:=$(call qstrip,$(CONFIG_TOOLCHAIN_ROOT))
 206       TOOLCHAIN_BIN_DIRS:=$(patsubst ./%,$(TOOLCHAIN_ROOT_DIR)/%,$(call qstrip,$(CONFIG_TOOLCHAIN_BIN_PATH)))
 207       TOOLCHAIN_INC_DIRS:=$(patsubst ./%,$(TOOLCHAIN_ROOT_DIR)/%,$(call qstrip,$(CONFIG_TOOLCHAIN_INC_PATH)))
 208       TOOLCHAIN_LIB_DIRS:=$(patsubst ./%,$(TOOLCHAIN_ROOT_DIR)/%,$(call qstrip,$(CONFIG_TOOLCHAIN_LIB_PATH)))
 209       ifneq ($(TOOLCHAIN_BIN_DIRS),)
 210         TARGET_PATH:=$(subst $(space),:,$(TOOLCHAIN_BIN_DIRS)):$(TARGET_PATH)
 211       endif
 212       ifneq ($(TOOLCHAIN_INC_DIRS),)
 213         TARGET_CPPFLAGS+= $(patsubst %,-I%,$(TOOLCHAIN_INC_DIRS))
 214       endif
 215       ifneq ($(TOOLCHAIN_LIB_DIRS),)
 216         TARGET_LDFLAGS+= $(patsubst %,-L%,$(TOOLCHAIN_LIB_DIRS))
 217       endif
 218       TARGET_PATH:=$(TOOLCHAIN_DIR)/bin:$(TARGET_PATH)
 219     endif
 220   endif
 221 endif
 222 TARGET_PATH_PKG:=$(STAGING_DIR)/host/bin:$(STAGING_DIR_HOSTPKG)/bin:$(TARGET_PATH)
 223
 224 ifeq ($(CONFIG_SOFT_FLOAT),y)
 225   SOFT_FLOAT_CONFIG_OPTION:=--with-float=soft
 226   ifeq ($(CONFIG_arm),y)
 227     TARGET_CFLAGS+= -mfloat-abi=soft
 228   else
 229     TARGET_CFLAGS+= -msoft-float
 230   endif
 231 else
 232   SOFT_FLOAT_CONFIG_OPTION:=
 233   ifeq ($(CONFIG_arm),y)
 234     TARGET_CFLAGS+= -mfloat-abi=hard
 235   endif
 236 endif
 237
 238 export PATH:=$(TARGET_PATH)
 239 export STAGING_DIR STAGING_DIR_HOST STAGING_DIR_HOSTPKG
 240 export SH_FUNC:=. $(INCLUDE_DIR)/shell.sh;
 241
 242 PKG_CONFIG:=$(STAGING_DIR_HOST)/bin/pkg-config
 243
 244 export PKG_CONFIG
 245
 246 HOSTCC:=gcc
 247 HOSTCXX:=g++
 248 HOST_CPPFLAGS:=-I$(STAGING_DIR_HOST)/include $(if $(IS_PACKAGE_BUILD),-I$(STAGING_DIR_HOSTPKG)/include -I$(STAGING_DIR)/host/include)
 249 HOST_CFLAGS:=-O2 $(HOST_CPPFLAGS)
 250 HOST_LDFLAGS:=-L$(STAGING_DIR_HOST)/lib $(if $(IS_PACKAGE_BUILD),-L$(STAGING_DIR_HOSTPKG)/lib -L$(STAGING_DIR)/host/lib)
 251
 252 ifeq ($(CONFIG_EXTERNAL_TOOLCHAIN),)
 253   TARGET_AR:=$(TARGET_CROSS)gcc-ar
 254   TARGET_RANLIB:=$(TARGET_CROSS)gcc-ranlib
 255   TARGET_NM:=$(TARGET_CROSS)gcc-nm
 256 else
 257   TARGET_AR:=$(TARGET_CROSS)ar
 258   TARGET_RANLIB:=$(TARGET_CROSS)ranlib
 259   TARGET_NM:=$(TARGET_CROSS)nm
 260 endif
 261
 262 BUILD_KEY=$(TOPDIR)/key-build
 263
 264 TARGET_CC:=$(TARGET_CROSS)gcc
 265 TARGET_CXX:=$(TARGET_CROSS)g++
 266 KPATCH:=$(SCRIPT_DIR)/patch-kernel.sh
 267 SED:=$(STAGING_DIR_HOST)/bin/sed -i -e
 268 ESED:=$(STAGING_DIR_HOST)/bin/sed -E -i -e
 269 CP:=cp -fpR
 270 LN:=ln -sf
 271 XARGS:=xargs -r
 272
 273 BASH:=bash
 274 TAR:=tar
 275 FIND:=find
 276 PATCH:=patch
 277 PYTHON:=python
 278
 279 INSTALL_BIN:=install -m0755
 280 INSTALL_SUID:=install -m4755
 281 INSTALL_DIR:=install -d -m0755
 282 INSTALL_DATA:=install -m0644
 283 INSTALL_CONF:=install -m0600
 284
 285 TARGET_CC_NOCACHE:=$(TARGET_CC)
 286 TARGET_CXX_NOCACHE:=$(TARGET_CXX)
 287 HOSTCC_NOCACHE:=$(HOSTCC)
 288 HOSTCXX_NOCACHE:=$(HOSTCXX)
 289 export TARGET_CC_NOCACHE
 290 export TARGET_CXX_NOCACHE
 291 export HOSTCC_NOCACHE
 292
 293 ifneq ($(CONFIG_CCACHE),)
 294   TARGET_CC:= ccache_cc
 295   TARGET_CXX:= ccache_cxx
 296   HOSTCC:= ccache $(HOSTCC)
 297   HOSTCXX:= ccache $(HOSTCXX)
 298 endif
 299
 300 TARGET_CONFIGURE_OPTS = \
 301   AR="$(TARGET_AR)" \
 302   AS="$(TARGET_CC) -c $(TARGET_ASFLAGS)" \
 303   LD=$(TARGET_CROSS)ld \
 304   NM="$(TARGET_NM)" \
 305   CC="$(TARGET_CC)" \
 306   GCC="$(TARGET_CC)" \
 307   CXX="$(TARGET_CXX)" \
 308   RANLIB="$(TARGET_RANLIB)" \
 309   STRIP=$(TARGET_CROSS)strip \
 310   OBJCOPY=$(TARGET_CROSS)objcopy \
 311   OBJDUMP=$(TARGET_CROSS)objdump \
 312   SIZE=$(TARGET_CROSS)size
 313
 314 # strip an entire directory
 315 ifneq ($(CONFIG_NO_STRIP),)
 316   RSTRIP:=:
 317   STRIP:=:
 318 else
 319   ifneq ($(CONFIG_USE_STRIP),)
 320     STRIP:=$(TARGET_CROSS)strip $(call qstrip,$(CONFIG_STRIP_ARGS))
 321   else
 322     ifneq ($(CONFIG_USE_SSTRIP),)
 323       STRIP:=$(STAGING_DIR_HOST)/bin/sstrip
 324     endif
 325   endif
 326   RSTRIP= \
 327     export CROSS="$(TARGET_CROSS)" \
 328                 $(if $(PKG_BUILD_ID),KEEP_BUILD_ID=1) \
 329                 $(if $(CONFIG_KERNEL_KALLSYMS),NO_RENAME=1) \
 330                 $(if $(CONFIG_KERNEL_PROFILING),KEEP_SYMBOLS=1); \
 331     NM="$(TARGET_CROSS)nm" \
 332     STRIP="$(STRIP)" \
 333     STRIP_KMOD="$(SCRIPT_DIR)/strip-kmod.sh" \
 334     PATCHELF="$(STAGING_DIR_HOST)/bin/patchelf" \
 335     $(SCRIPT_DIR)/rstrip.sh
 336 endif
 337
 338 ifeq ($(CONFIG_IPV6),y)
 339   DISABLE_IPV6:=
 340 else
 341   DISABLE_IPV6:=--disable-ipv6
 342 endif
 343
 344 TAR_OPTIONS:=-xf -
 345
 346 ifeq ($(CONFIG_BUILD_LOG),y)
 347   BUILD_LOG:=1
 348 endif
 349
 350 export BISON_PKGDATADIR:=$(STAGING_DIR_HOST)/share/bison
 351 export M4:=$(STAGING_DIR_HOST)/bin/m4
 352
 353 define shvar
 354 V_$(subst .,_,$(subst -,_,$(subst /,_,$(1))))
 355 endef
 356
 357 define shexport
 358 export $(call shvar,$(1))=$$(call $(1))
 359 endef
 360
 361 # Execute commands under flock
 362 # $(1) => The shell expression.
 363 # $(2) => The lock name. If not given, the global lock will be used.
 364 ifneq ($(wildcard $(STAGING_DIR_HOST)/bin/flock),)
 365   define locked
 366         SHELL= \
 367         flock \
 368                 $(TMP_DIR)/.$(if $(2),$(strip $(2)),global).flock \
 369                 -c '$(subst ','\'',$(1))'
 370   endef
 371 else
 372   locked=$(1)
 373 endif
 374
 375 # Recursively copy paths into another directory, purge dangling
 376 # symlinks before.
 377 # $(1) => File glob expression
 378 # $(2) => Destination directory
 379 define file_copy
 380         for src_dir in $(sort $(foreach d,$(wildcard $(1)),$(dir $(d)))); do \
 381                 ( cd $$src_dir; find -type f -or -type d ) | \
 382                         ( cd $(2); while :; do \
 383                                 read FILE; \
 384                                 [ -z "$$FILE" ] && break; \
 385                                 [ -L "$$FILE" ] || continue; \
 386                                 echo "Removing symlink $(2)/$$FILE"; \
 387                                 rm -f "$$FILE"; \
 388                         done; ); \
 389         done; \
 390         $(CP) $(1) $(2)
 391 endef
 392
 393 # Calculate sha256sum of any plain file within a given directory
 394 # $(1) => Input directory
 395 # $(2) => If set, recurse into subdirectories
 396 define sha256sums
 397         (cd $(1); find . $(if $(2),,-maxdepth 1) -type f -not -name 'sha256sums' -printf "%P\n" | sort | \
 398                 xargs -r $(STAGING_DIR_HOST)/bin/mkhash -n sha256 | sed -ne 's!^\(.*\) \(.*\)$$!\1 *\2!p' > sha256sums)
 399 endef
 400
 401 # file extension
 402 ext=$(word $(words $(subst ., ,$(1))),$(subst ., ,$(1)))
 403
 404 all:
 405 FORCE: ;
 406 .PHONY: FORCE
 407
 408 check: FORCE
 409         @true
 410
 411 val.%:
 412         @$(if $(filter undefined,$(origin $*)),\
 413                 echo "$* undefined" >&2, \
 414                 echo '$(subst ','"'"',$($*))' \
 415         )
 416
 417 var.%:
 418         @$(if $(filter undefined,$(origin $*)),\
 419                 echo "$* undefined" >&2, \
 420                 echo "$*='"'$(subst ','"'\"'\"'"',$($*))'"'" \
 421         )
 422
 423 endif #__rules_inc