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