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),$(CONFIG_TARGET_uml)),)
 143   ifeq ($(CONFIG_GCC_USE_EMBEDDED_PATH_REMAP),y)
 144     iremap = -fmacro-prefix-map=$(1)=$(2)
 145   else
 146     iremap = -iremap$(1):$(2)
 147   endif
 148 endif
 149
 150 PACKAGE_DIR:=$(BIN_DIR)/packages
 151 PACKAGE_DIR_ALL:=$(TOPDIR)/staging_dir/packages/$(BOARD)
 152 BUILD_DIR:=$(BUILD_DIR_BASE)/$(TARGET_DIR_NAME)
 153 STAGING_DIR:=$(TOPDIR)/staging_dir/$(TARGET_DIR_NAME)
 154 BUILD_DIR_TOOLCHAIN:=$(BUILD_DIR_BASE)/$(TOOLCHAIN_DIR_NAME)
 155 TOOLCHAIN_DIR:=$(TOPDIR)/staging_dir/$(TOOLCHAIN_DIR_NAME)
 156 STAMP_DIR:=$(BUILD_DIR)/stamp
 157 STAMP_DIR_HOST=$(BUILD_DIR_HOST)/stamp
 158 TARGET_ROOTFS_DIR?=$(if $(call qstrip,$(CONFIG_TARGET_ROOTFS_DIR)),$(call qstrip,$(CONFIG_TARGET_ROOTFS_DIR)),$(BUILD_DIR))
 159 TARGET_DIR:=$(TARGET_ROOTFS_DIR)/root-$(BOARD)
 160 STAGING_DIR_ROOT:=$(STAGING_DIR)/root-$(BOARD)
 161 STAGING_DIR_IMAGE:=$(STAGING_DIR)/image
 162 BUILD_LOG_DIR:=$(TOPDIR)/logs
 163 PKG_INFO_DIR := $(STAGING_DIR)/pkginfo
 164
 165 BUILD_DIR_HOST:=$(if $(IS_PACKAGE_BUILD),$(BUILD_DIR_BASE)/hostpkg,$(BUILD_DIR_BASE)/host)
 166 STAGING_DIR_HOST:=$(TOPDIR)/staging_dir/host
 167 STAGING_DIR_HOSTPKG:=$(TOPDIR)/staging_dir/hostpkg
 168
 169 TARGET_PATH:=$(subst $(space),:,$(filter-out .,$(filter-out ./,$(subst :,$(space),$(PATH)))))
 170 TARGET_INIT_PATH:=$(call qstrip,$(CONFIG_TARGET_INIT_PATH))
 171 TARGET_INIT_PATH:=$(if $(TARGET_INIT_PATH),$(TARGET_INIT_PATH),/usr/sbin:/sbin:/usr/bin:/bin)
 172 TARGET_CFLAGS:=$(TARGET_OPTIMIZATION)$(if $(CONFIG_DEBUG), -g3) $(call qstrip,$(CONFIG_EXTRA_OPTIMIZATION))
 173 TARGET_CXXFLAGS = $(TARGET_CFLAGS)
 174 TARGET_ASFLAGS_DEFAULT = $(TARGET_CFLAGS)
 175 TARGET_ASFLAGS = $(TARGET_ASFLAGS_DEFAULT)
 176 TARGET_CPPFLAGS:=-I$(STAGING_DIR)/usr/include -I$(STAGING_DIR)/include
 177 TARGET_LDFLAGS:=-L$(STAGING_DIR)/usr/lib -L$(STAGING_DIR)/lib
 178 ifneq ($(CONFIG_EXTERNAL_TOOLCHAIN),)
 179 LIBGCC_S_PATH=$(realpath $(wildcard $(call qstrip,$(CONFIG_LIBGCC_ROOT_DIR))/$(call qstrip,$(CONFIG_LIBGCC_FILE_SPEC))))
 180 LIBGCC_S=$(if $(LIBGCC_S_PATH),-L$(dir $(LIBGCC_S_PATH)) -lgcc_s)
 181 LIBGCC_A=$(realpath $(lastword $(wildcard $(dir $(LIBGCC_S_PATH))/gcc/*/*/libgcc.a)))
 182 else
 183 LIBGCC_A=$(lastword $(wildcard $(TOOLCHAIN_DIR)/lib/gcc/*/*/libgcc.a))
 184 LIBGCC_S=$(if $(wildcard $(TOOLCHAIN_DIR)/lib/libgcc_s.so),-L$(TOOLCHAIN_DIR)/lib -lgcc_s,$(LIBGCC_A))
 185 endif
 186
 187 ifeq ($(CONFIG_ARCH_64BIT),y)
 188   LIB_SUFFIX:=64
 189 endif
 190
 191 ifndef DUMP
 192   ifeq ($(CONFIG_EXTERNAL_TOOLCHAIN),)
 193     -include $(TOOLCHAIN_DIR)/info.mk
 194     export GCC_HONOUR_COPTS:=0
 195     TARGET_CROSS:=$(if $(TARGET_CROSS),$(TARGET_CROSS),$(OPTIMIZE_FOR_CPU)-openwrt-linux$(if $(TARGET_SUFFIX),-$(TARGET_SUFFIX))-)
 196     TARGET_CFLAGS+= -fhonour-copts -Wno-error=unused-but-set-variable -Wno-error=unused-result
 197     TARGET_CPPFLAGS+= -I$(TOOLCHAIN_DIR)/usr/include
 198     ifeq ($(CONFIG_USE_MUSL),y)
 199       TARGET_CPPFLAGS+= -I$(TOOLCHAIN_DIR)/include/fortify
 200     endif
 201     TARGET_CPPFLAGS+= -I$(TOOLCHAIN_DIR)/include
 202     TARGET_LDFLAGS+= -L$(TOOLCHAIN_DIR)/usr/lib -L$(TOOLCHAIN_DIR)/lib
 203     TARGET_PATH:=$(TOOLCHAIN_DIR)/bin:$(TARGET_PATH)
 204   else
 205     ifeq ($(CONFIG_NATIVE_TOOLCHAIN),)
 206       TARGET_CROSS:=$(call qstrip,$(CONFIG_TOOLCHAIN_PREFIX))
 207       TOOLCHAIN_ROOT_DIR:=$(call qstrip,$(CONFIG_TOOLCHAIN_ROOT))
 208       TOOLCHAIN_BIN_DIRS:=$(patsubst ./%,$(TOOLCHAIN_ROOT_DIR)/%,$(call qstrip,$(CONFIG_TOOLCHAIN_BIN_PATH)))
 209       TOOLCHAIN_INC_DIRS:=$(patsubst ./%,$(TOOLCHAIN_ROOT_DIR)/%,$(call qstrip,$(CONFIG_TOOLCHAIN_INC_PATH)))
 210       TOOLCHAIN_LIB_DIRS:=$(patsubst ./%,$(TOOLCHAIN_ROOT_DIR)/%,$(call qstrip,$(CONFIG_TOOLCHAIN_LIB_PATH)))
 211       ifneq ($(TOOLCHAIN_BIN_DIRS),)
 212         TARGET_PATH:=$(subst $(space),:,$(TOOLCHAIN_BIN_DIRS)):$(TARGET_PATH)
 213       endif
 214       ifneq ($(TOOLCHAIN_INC_DIRS),)
 215         TARGET_CPPFLAGS+= $(patsubst %,-I%,$(TOOLCHAIN_INC_DIRS))
 216       endif
 217       ifneq ($(TOOLCHAIN_LIB_DIRS),)
 218         TARGET_LDFLAGS+= $(patsubst %,-L%,$(TOOLCHAIN_LIB_DIRS))
 219       endif
 220       TARGET_PATH:=$(TOOLCHAIN_DIR)/bin:$(TARGET_PATH)
 221     endif
 222   endif
 223 endif
 224 TARGET_PATH_PKG:=$(STAGING_DIR)/host/bin:$(STAGING_DIR_HOSTPKG)/bin:$(TARGET_PATH)
 225
 226 ifeq ($(CONFIG_SOFT_FLOAT),y)
 227   SOFT_FLOAT_CONFIG_OPTION:=--with-float=soft
 228   ifeq ($(CONFIG_arm),y)
 229     TARGET_CFLAGS+= -mfloat-abi=soft
 230   else
 231     TARGET_CFLAGS+= -msoft-float
 232   endif
 233 else
 234   SOFT_FLOAT_CONFIG_OPTION:=
 235   ifeq ($(CONFIG_arm),y)
 236     TARGET_CFLAGS+= -mfloat-abi=hard
 237   endif
 238 endif
 239
 240 export PATH:=$(TARGET_PATH)
 241 export STAGING_DIR STAGING_DIR_HOST STAGING_DIR_HOSTPKG
 242 export SH_FUNC:=. $(INCLUDE_DIR)/shell.sh;
 243
 244 PKG_CONFIG:=$(STAGING_DIR_HOST)/bin/pkg-config
 245
 246 export PKG_CONFIG
 247
 248 HOSTCC:=gcc
 249 HOSTCXX:=g++
 250 HOST_CPPFLAGS:=-I$(STAGING_DIR_HOST)/include $(if $(IS_PACKAGE_BUILD),-I$(STAGING_DIR_HOSTPKG)/include -I$(STAGING_DIR)/host/include)
 251 HOST_CFLAGS:=-O2 $(HOST_CPPFLAGS)
 252 HOST_LDFLAGS:=-L$(STAGING_DIR_HOST)/lib $(if $(IS_PACKAGE_BUILD),-L$(STAGING_DIR_HOSTPKG)/lib -L$(STAGING_DIR)/host/lib)
 253
 254 ifeq ($(CONFIG_EXTERNAL_TOOLCHAIN),)
 255   TARGET_AR:=$(TARGET_CROSS)gcc-ar
 256   TARGET_RANLIB:=$(TARGET_CROSS)gcc-ranlib
 257   TARGET_NM:=$(TARGET_CROSS)gcc-nm
 258 else
 259   TARGET_AR:=$(TARGET_CROSS)ar
 260   TARGET_RANLIB:=$(TARGET_CROSS)ranlib
 261   TARGET_NM:=$(TARGET_CROSS)nm
 262 endif
 263
 264 BUILD_KEY=$(TOPDIR)/key-build
 265
 266 TARGET_CC:=$(TARGET_CROSS)gcc
 267 TARGET_CXX:=$(TARGET_CROSS)g++
 268 KPATCH:=$(SCRIPT_DIR)/patch-kernel.sh
 269 SED:=$(STAGING_DIR_HOST)/bin/sed -i -e
 270 ESED:=$(STAGING_DIR_HOST)/bin/sed -E -i -e
 271 CP:=cp -fpR
 272 LN:=ln -sf
 273 XARGS:=xargs -r
 274
 275 BASH:=bash
 276 TAR:=tar
 277 FIND:=find
 278 PATCH:=patch
 279 PYTHON:=python
 280
 281 INSTALL_BIN:=install -m0755
 282 INSTALL_SUID:=install -m4755
 283 INSTALL_DIR:=install -d -m0755
 284 INSTALL_DATA:=install -m0644
 285 INSTALL_CONF:=install -m0600
 286
 287 TARGET_CC_NOCACHE:=$(TARGET_CC)
 288 TARGET_CXX_NOCACHE:=$(TARGET_CXX)
 289 HOSTCC_NOCACHE:=$(HOSTCC)
 290 HOSTCXX_NOCACHE:=$(HOSTCXX)
 291 export TARGET_CC_NOCACHE
 292 export TARGET_CXX_NOCACHE
 293 export HOSTCC_NOCACHE
 294
 295 ifneq ($(CONFIG_CCACHE),)
 296   TARGET_CC:= ccache_cc
 297   TARGET_CXX:= ccache_cxx
 298   HOSTCC:= ccache $(HOSTCC)
 299   HOSTCXX:= ccache $(HOSTCXX)
 300 endif
 301
 302 TARGET_CONFIGURE_OPTS = \
 303   AR="$(TARGET_AR)" \
 304   AS="$(TARGET_CC) -c $(TARGET_ASFLAGS)" \
 305   LD=$(TARGET_CROSS)ld \
 306   NM="$(TARGET_NM)" \
 307   CC="$(TARGET_CC)" \
 308   GCC="$(TARGET_CC)" \
 309   CXX="$(TARGET_CXX)" \
 310   RANLIB="$(TARGET_RANLIB)" \
 311   STRIP=$(TARGET_CROSS)strip \
 312   OBJCOPY=$(TARGET_CROSS)objcopy \
 313   OBJDUMP=$(TARGET_CROSS)objdump \
 314   SIZE=$(TARGET_CROSS)size
 315
 316 # strip an entire directory
 317 ifneq ($(CONFIG_NO_STRIP),)
 318   RSTRIP:=:
 319   STRIP:=:
 320 else
 321   ifneq ($(CONFIG_USE_STRIP),)
 322     STRIP:=$(TARGET_CROSS)strip $(call qstrip,$(CONFIG_STRIP_ARGS))
 323   else
 324     ifneq ($(CONFIG_USE_SSTRIP),)
 325       STRIP:=$(STAGING_DIR_HOST)/bin/sstrip
 326     endif
 327   endif
 328   RSTRIP= \
 329     export CROSS="$(TARGET_CROSS)" \
 330                 $(if $(PKG_BUILD_ID),KEEP_BUILD_ID=1) \
 331                 $(if $(CONFIG_KERNEL_KALLSYMS),NO_RENAME=1) \
 332                 $(if $(CONFIG_KERNEL_PROFILING),KEEP_SYMBOLS=1); \
 333     NM="$(TARGET_CROSS)nm" \
 334     STRIP="$(STRIP)" \
 335     STRIP_KMOD="$(SCRIPT_DIR)/strip-kmod.sh" \
 336     PATCHELF="$(STAGING_DIR_HOST)/bin/patchelf" \
 337     $(SCRIPT_DIR)/rstrip.sh
 338 endif
 339
 340 ifeq ($(CONFIG_IPV6),y)
 341   DISABLE_IPV6:=
 342 else
 343   DISABLE_IPV6:=--disable-ipv6
 344 endif
 345
 346 TAR_OPTIONS:=-xf -
 347
 348 ifeq ($(CONFIG_BUILD_LOG),y)
 349   BUILD_LOG:=1
 350 endif
 351
 352 export BISON_PKGDATADIR:=$(STAGING_DIR_HOST)/share/bison
 353 export M4:=$(STAGING_DIR_HOST)/bin/m4
 354
 355 define shvar
 356 V_$(subst .,_,$(subst -,_,$(subst /,_,$(1))))
 357 endef
 358
 359 define shexport
 360 export $(call shvar,$(1))=$$(call $(1))
 361 endef
 362
 363 # Execute commands under flock
 364 # $(1) => The shell expression.
 365 # $(2) => The lock name. If not given, the global lock will be used.
 366 ifneq ($(wildcard $(STAGING_DIR_HOST)/bin/flock),)
 367   define locked
 368         SHELL= \
 369         flock \
 370                 $(TMP_DIR)/.$(if $(2),$(strip $(2)),global).flock \
 371                 -c '$(subst ','\'',$(1))'
 372   endef
 373 else
 374   locked=$(1)
 375 endif
 376
 377 # Recursively copy paths into another directory, purge dangling
 378 # symlinks before.
 379 # $(1) => File glob expression
 380 # $(2) => Destination directory
 381 define file_copy
 382         for src_dir in $(sort $(foreach d,$(wildcard $(1)),$(dir $(d)))); do \
 383                 ( cd $$src_dir; find -type f -or -type d ) | \
 384                         ( cd $(2); while :; do \
 385                                 read FILE; \
 386                                 [ -z "$$FILE" ] && break; \
 387                                 [ -L "$$FILE" ] || continue; \
 388                                 echo "Removing symlink $(2)/$$FILE"; \
 389                                 rm -f "$$FILE"; \
 390                         done; ); \
 391         done; \
 392         $(CP) $(1) $(2)
 393 endef
 394
 395 # Calculate sha256sum of any plain file within a given directory
 396 # $(1) => Input directory
 397 # $(2) => If set, recurse into subdirectories
 398 define sha256sums
 399         (cd $(1); find . $(if $(2),,-maxdepth 1) -type f -not -name 'sha256sums' -printf "%P\n" | sort | \
 400                 xargs -r $(STAGING_DIR_HOST)/bin/mkhash -n sha256 | sed -ne 's!^\(.*\) \(.*\)$$!\1 *\2!p' > sha256sums)
 401 endef
 402
 403 # file extension
 404 ext=$(word $(words $(subst ., ,$(1))),$(subst ., ,$(1)))
 405
 406 all:
 407 FORCE: ;
 408 .PHONY: FORCE
 409
 410 check: FORCE
 411         @true
 412
 413 val.%:
 414         @$(if $(filter undefined,$(origin $*)),\
 415                 echo "$* undefined" >&2, \
 416                 echo '$(subst ','"'"',$($*))' \
 417         )
 418
 419 var.%:
 420         @$(if $(filter undefined,$(origin $*)),\
 421                 echo "$* undefined" >&2, \
 422                 echo "$*='"'$(subst ','"'\"'\"'"',$($*))'"'" \
 423         )
 424
 425 endif #__rules_inc