X-Git-Url: https://git.archive.openwrt.org/?p=openwrt.git;a=blobdiff_plain;f=rules.mk;h=47ba928de59e0fa366feca8d9fefca38f47dd3ac;hp=a94eee9cd1c15319c5a04d831f51b7045aa1fe56;hb=2121652b7de70a94c22a02ef39bffdbf82b9a6f6;hpb=f2a0915886fd9ac1781f79efd90b63c0292e32e2

diff --git a/rules.mk b/rules.mk
index a94eee9cd1..47ba928de5 100644
--- a/rules.mk
+++ b/rules.mk
@@ -1,117 +1,345 @@
+#
+# Copyright (C) 2006-2010 OpenWrt.org
+#
+# This is free software, licensed under the GNU General Public License v2.
+# See /LICENSE for more information.
+#
+
+ifneq ($(__rules_inc),1)
+__rules_inc=1
+
 ifeq ($(DUMP),)
-include $(TOPDIR)/.config
+  -include $(TOPDIR)/.config
 endif
+include $(TOPDIR)/include/debug.mk
+include $(TOPDIR)/include/verbose.mk
+
+export TMP_DIR:=$(TOPDIR)/tmp
+
+GREP_OPTIONS=
+export GREP_OPTIONS
+
+qstrip=$(strip $(subst ",,$(1)))
+#"))
+
+empty:=
+space:= $(empty) $(empty)
+merge=$(subst $(space),,$(1))
+confvar=$(call merge,$(foreach v,$(1),$(if $($(v)),y,n)))
+strip_last=$(patsubst %.$(lastword $(subst .,$(space),$(1))),%,$(1))
+
+define sep
+
+endef
 
-SHELL=/bin/bash
-export SHELL
+_SINGLE=export MAKEFLAGS=$(space);
+CFLAGS:=
+ARCH:=$(subst i486,i386,$(subst i586,i386,$(subst i686,i386,$(call qstrip,$(CONFIG_ARCH)))))
+ARCH_PACKAGES:=$(call qstrip,$(CONFIG_TARGET_ARCH_PACKAGES))
+BOARD:=$(call qstrip,$(CONFIG_TARGET_BOARD))
+TARGET_OPTIMIZATION:=$(call qstrip,$(CONFIG_TARGET_OPTIMIZATION))
+export EXTRA_OPTIMIZATION:=$(call qstrip,$(CONFIG_EXTRA_OPTIMIZATION))
+TARGET_SUFFIX=$(call qstrip,$(CONFIG_TARGET_SUFFIX))
+BUILD_SUFFIX:=$(call qstrip,$(CONFIG_BUILD_SUFFIX))
+SUBDIR:=$(patsubst $(TOPDIR)/%,%,${CURDIR})
+export SHELL:=/usr/bin/env bash
 
-ifdef V
-  ifeq ("$(origin V)", "command line")
-    KBUILD_VERBOSE = $(V)
+OPTIMIZE_FOR_CPU=$(subst i386,i486,$(ARCH))
+
+ifeq ($(ARCH),powerpc)
+  FPIC:=-fPIC
+else
+  FPIC:=-fpic
+endif
+
+HOST_FPIC:=-fPIC
+
+ARCH_SUFFIX:=$(call qstrip,$(CONFIG_CPU_TYPE))
+GCC_ARCH:=
+
+ifneq ($(ARCH_SUFFIX),)
+  ARCH_SUFFIX:=_$(ARCH_SUFFIX)
+endif
+ifneq ($(filter -march=armv%,$(TARGET_OPTIMIZATION)),)
+  GCC_ARCH:=$(patsubst -march=%,%,$(filter -march=armv%,$(TARGET_OPTIMIZATION)))
+endif
+ifdef CONFIG_HAS_SPE_FPU
+  TARGET_SUFFIX:=$(TARGET_SUFFIX)spe
+endif
+ifdef CONFIG_MIPS64_ABI
+  ifneq ($(CONFIG_MIPS64_ABI_O32),y)
+     ARCH_SUFFIX:=$(ARCH_SUFFIX)_$(call qstrip,$(CONFIG_MIPS64_ABI))
   endif
 endif
-ifndef KBUILD_VERBOSE
-  KBUILD_VERBOSE = 0
+
+DL_DIR:=$(if $(call qstrip,$(CONFIG_DOWNLOAD_FOLDER)),$(call qstrip,$(CONFIG_DOWNLOAD_FOLDER)),$(TOPDIR)/dl)
+BIN_DIR:=$(if $(call qstrip,$(CONFIG_BINARY_FOLDER)),$(call qstrip,$(CONFIG_BINARY_FOLDER)),$(TOPDIR)/bin/$(BOARD))
+INCLUDE_DIR:=$(TOPDIR)/include
+SCRIPT_DIR:=$(TOPDIR)/scripts
+BUILD_DIR_BASE:=$(TOPDIR)/build_dir
+BUILD_DIR_HOST:=$(BUILD_DIR_BASE)/host
+STAGING_DIR_HOST:=$(TOPDIR)/staging_dir/host
+ifeq ($(CONFIG_EXTERNAL_TOOLCHAIN),)
+  GCCV:=$(call qstrip,$(CONFIG_GCC_VERSION))
+  LIBC:=$(call qstrip,$(CONFIG_LIBC))
+  LIBCV:=$(call qstrip,$(CONFIG_LIBC_VERSION))
+  REAL_GNU_TARGET_NAME=$(OPTIMIZE_FOR_CPU)-openwrt-linux$(if $(TARGET_SUFFIX),-$(TARGET_SUFFIX))
+  GNU_TARGET_NAME=$(OPTIMIZE_FOR_CPU)-openwrt-linux
+  DIR_SUFFIX:=_$(LIBC)-$(LIBCV)$(if $(CONFIG_arm),_eabi)
+  BIN_DIR:=$(BIN_DIR)$(if $(CONFIG_USE_UCLIBC),,-$(LIBC))
+  BUILD_DIR:=$(BUILD_DIR_BASE)/target-$(ARCH)$(ARCH_SUFFIX)$(DIR_SUFFIX)$(if $(BUILD_SUFFIX),_$(BUILD_SUFFIX))
+  STAGING_DIR:=$(TOPDIR)/staging_dir/target-$(ARCH)$(ARCH_SUFFIX)$(DIR_SUFFIX)$(if $(BUILD_SUFFIX),_$(BUILD_SUFFIX))
+  BUILD_DIR_TOOLCHAIN:=$(BUILD_DIR_BASE)/toolchain-$(ARCH)$(ARCH_SUFFIX)_gcc-$(GCCV)$(DIR_SUFFIX)
+  TOOLCHAIN_DIR:=$(TOPDIR)/staging_dir/toolchain-$(ARCH)$(ARCH_SUFFIX)_gcc-$(GCCV)$(DIR_SUFFIX)
+  PACKAGE_DIR:=$(BIN_DIR)/packages
+else
+  ifeq ($(CONFIG_NATIVE_TOOLCHAIN),)
+    GNU_TARGET_NAME=$(call qstrip,$(CONFIG_TARGET_NAME))
+  else
+    GNU_TARGET_NAME=$(shell gcc -dumpmachine)
+  endif
+  REAL_GNU_TARGET_NAME=$(GNU_TARGET_NAME)
+  BUILD_DIR:=$(BUILD_DIR_BASE)/target-$(GNU_TARGET_NAME)$(if $(BUILD_SUFFIX),_$(BUILD_SUFFIX))
+  STAGING_DIR:=$(TOPDIR)/staging_dir/target-$(GNU_TARGET_NAME)$(if $(BUILD_SUFFIX),_$(BUILD_SUFFIX))
+  BUILD_DIR_TOOLCHAIN:=$(BUILD_DIR_BASE)/toolchain-$(GNU_TARGET_NAME)
+  TOOLCHAIN_DIR:=$(TOPDIR)/staging_dir/toolchain-$(GNU_TARGET_NAME)
+  PACKAGE_DIR:=$(BIN_DIR)/packages
 endif
+STAMP_DIR:=$(BUILD_DIR)/stamp
+STAMP_DIR_HOST=$(BUILD_DIR_HOST)/stamp
+TARGET_ROOTFS_DIR?=$(if $(call qstrip,$(CONFIG_TARGET_ROOTFS_DIR)),$(call qstrip,$(CONFIG_TARGET_ROOTFS_DIR)),$(BUILD_DIR))
+TARGET_DIR:=$(TARGET_ROOTFS_DIR)/root-$(BOARD)
+STAGING_DIR_ROOT:=$(STAGING_DIR)/root-$(BOARD)
+BUILD_LOG_DIR:=$(TOPDIR)/logs
+PKG_INFO_DIR := $(STAGING_DIR)/pkginfo
 
-ifneq ($(KBUILD_VERBOSE),0)
-  quiet =
-  Q =
+TARGET_PATH:=$(STAGING_DIR_HOST)/bin:$(subst $(space),:,$(filter-out .,$(filter-out ./,$(subst :,$(space),$(PATH)))))
+TARGET_CFLAGS:=$(TARGET_OPTIMIZATION)$(if $(CONFIG_DEBUG), -g3) $(EXTRA_OPTIMIZATION)
+TARGET_CXXFLAGS = $(TARGET_CFLAGS)
+TARGET_ASFLAGS_DEFAULT = $(TARGET_CFLAGS)
+TARGET_ASFLAGS = $(TARGET_ASFLAGS_DEFAULT)
+TARGET_CPPFLAGS:=-I$(STAGING_DIR)/usr/include -I$(STAGING_DIR)/include
+TARGET_LDFLAGS:=-L$(STAGING_DIR)/usr/lib -L$(STAGING_DIR)/lib
+ifneq ($(CONFIG_EXTERNAL_TOOLCHAIN),)
+LIBGCC_S_PATH=$(realpath $(wildcard $(call qstrip,$(CONFIG_LIBGCC_ROOT_DIR))/$(call qstrip,$(CONFIG_LIBGCC_FILE_SPEC))))
+LIBGCC_S=$(if $(LIBGCC_S_PATH),-L$(dir $(LIBGCC_S_PATH)) -lgcc_s)
+LIBGCC_A=$(realpath $(lastword $(wildcard $(dir $(LIBGCC_S_PATH))/gcc/*/*/libgcc.a)))
 else
-  quiet=quiet_
-  Q = @
+LIBGCC_A=$(lastword $(wildcard $(TOOLCHAIN_DIR)/lib/gcc/*/*/libgcc.a))
+LIBGCC_S=$(if $(wildcard $(TOOLCHAIN_DIR)/lib/libgcc_s.so),-L$(TOOLCHAIN_DIR)/lib -lgcc_s,$(LIBGCC_A))
 endif
+LIBRPC=-lrpc
+LIBRPC_DEPENDS=+librpc
 
+ifeq ($(CONFIG_ARCH_64BIT),y)
+  LIB_SUFFIX:=64
+endif
 
-CP=cp -fpR
-MAKE1=make
-MAKEFLAGS=-j$(CONFIG_JLEVEL) V=$(V) $(EXTRA_MAKEFLAGS)
-# Strip off the annoying quoting
-ARCH:=$(strip $(subst ",, $(CONFIG_ARCH)))
-WGET:=$(strip $(subst ",, $(CONFIG_WGET)))
-TARGET_OPTIMIZATION:=$(strip $(subst ",, $(CONFIG_TARGET_OPTIMIZATION)))
-#"))"))"))"))")) # for vim's broken syntax highlighting :)
+ifndef DUMP
+  ifeq ($(CONFIG_EXTERNAL_TOOLCHAIN),)
+    -include $(TOOLCHAIN_DIR)/info.mk
+    export GCC_HONOUR_COPTS:=0
+    TARGET_CROSS:=$(if $(TARGET_CROSS),$(TARGET_CROSS),$(OPTIMIZE_FOR_CPU)-openwrt-linux$(if $(TARGET_SUFFIX),-$(TARGET_SUFFIX))-)
+    TARGET_CFLAGS+= -fhonour-copts $(if $(CONFIG_GCC_VERSION_4_4)$(CONFIG_GCC_VERSION_4_5),,-Wno-error=unused-but-set-variable)
+    TARGET_CPPFLAGS+= -I$(TOOLCHAIN_DIR)/usr/include -I$(TOOLCHAIN_DIR)/include
+    TARGET_LDFLAGS+= -L$(TOOLCHAIN_DIR)/usr/lib -L$(TOOLCHAIN_DIR)/lib
+    TARGET_PATH:=$(TOOLCHAIN_DIR)/bin:$(TARGET_PATH)
+  else
+    ifeq ($(CONFIG_NATIVE_TOOLCHAIN),)
+      TARGET_CROSS:=$(call qstrip,$(CONFIG_TOOLCHAIN_PREFIX))
+      TOOLCHAIN_ROOT_DIR:=$(call qstrip,$(CONFIG_TOOLCHAIN_ROOT))
+      TOOLCHAIN_BIN_DIRS:=$(patsubst ./%,$(TOOLCHAIN_ROOT_DIR)/%,$(call qstrip,$(CONFIG_TOOLCHAIN_BIN_PATH)))
+      TOOLCHAIN_INC_DIRS:=$(patsubst ./%,$(TOOLCHAIN_ROOT_DIR)/%,$(call qstrip,$(CONFIG_TOOLCHAIN_INC_PATH)))
+      TOOLCHAIN_LIB_DIRS:=$(patsubst ./%,$(TOOLCHAIN_ROOT_DIR)/%,$(call qstrip,$(CONFIG_TOOLCHAIN_LIB_PATH)))
+      ifneq ($(TOOLCHAIN_BIN_DIRS),)
+        TARGET_PATH:=$(subst $(space),:,$(TOOLCHAIN_BIN_DIRS)):$(TARGET_PATH)
+      endif
+      ifneq ($(TOOLCHAIN_INC_DIRS),)
+        TARGET_CPPFLAGS+= $(patsubst %,-I%,$(TOOLCHAIN_INC_DIRS))
+      endif
+      ifneq ($(TOOLCHAIN_LIB_DIRS),)
+        TARGET_LDFLAGS+= $(patsubst %,-L%,$(TOOLCHAIN_LIB_DIRS))
+      endif
+      TARGET_PATH:=$(TOOLCHAIN_DIR)/bin:$(TARGET_PATH)
+    endif
+  endif
+endif
+TARGET_PATH_PKG:=$(STAGING_DIR)/host/bin:$(TARGET_PATH)
 
-ifeq ($(CONFIG_TAR_VERBOSITY),y)
-TAR_OPTIONS=-xvf
+ifeq ($(CONFIG_SOFT_FLOAT),y)
+  SOFT_FLOAT_CONFIG_OPTION:=--with-float=soft
+  ifeq ($(CONFIG_arm),y)
+    TARGET_CFLAGS+= -mfloat-abi=soft
+  else
+    TARGET_CFLAGS+= -msoft-float
+  endif
 else
-TAR_OPTIONS=-xf
+  SOFT_FLOAT_CONFIG_OPTION:=
+  ifeq ($(CONFIG_arm),y)
+    TARGET_CFLAGS+= -mfloat-abi=hard
+  endif
 endif
 
-ifneq ($(CONFIG_LARGEFILE),y)
-DISABLE_LARGEFILE= --disable-largefile
-endif
-TARGET_CFLAGS:=$(TARGET_OPTIMIZATION) $(TARGET_DEBUGGING)
+export PATH:=$(TARGET_PATH)
+export STAGING_DIR
+export SH_FUNC:=. $(INCLUDE_DIR)/shell.sh;
+
+PKG_CONFIG:=$(STAGING_DIR_HOST)/bin/pkg-config
+
+export PKG_CONFIG
 
-OPTIMIZE_FOR_CPU=$(ARCH)
 HOSTCC:=gcc
-BASE_DIR:=$(TOPDIR)
-DL_DIR:=$(BASE_DIR)/dl
-BUILD_DIR:=$(BASE_DIR)/build_$(ARCH)
-STAGING_DIR:=$(BASE_DIR)/staging_dir_$(ARCH)
-SCRIPT_DIR:=$(BASE_DIR)/scripts
-BIN_DIR:=$(BASE_DIR)/bin
-STAMP_DIR:=$(BUILD_DIR)/stamp
-PACKAGE_DIR:=$(BIN_DIR)/packages
-STAMP_DIR:=$(BUILD_DIR)/stamp
-TARGET_DIR:=$(BUILD_DIR)/root
-TOOL_BUILD_DIR=$(BASE_DIR)/toolchain_build_$(ARCH)
-TARGET_PATH=$(STAGING_DIR)/usr/bin:$(STAGING_DIR)/bin:/bin:/sbin:/usr/bin:/usr/sbin
-IMAGE:=$(BUILD_DIR)/root_fs_$(ARCH)
-REAL_GNU_TARGET_NAME=$(OPTIMIZE_FOR_CPU)-linux-uclibc
-GNU_TARGET_NAME=$(OPTIMIZE_FOR_CPU)-linux
-KERNEL_CROSS:=$(STAGING_DIR)/bin/$(OPTIMIZE_FOR_CPU)-linux-uclibc-
-TARGET_CROSS:=$(STAGING_DIR)/bin/$(OPTIMIZE_FOR_CPU)-linux-uclibc-
+HOSTCXX:=g++
+HOST_CPPFLAGS:=-I$(STAGING_DIR_HOST)/include
+HOST_CFLAGS:=-O2 $(HOST_CPPFLAGS)
+HOST_LDFLAGS:=-L$(STAGING_DIR_HOST)/lib
+
 TARGET_CC:=$(TARGET_CROSS)gcc
-STRIP:=$(STAGING_DIR)/bin/sstrip
-PATCH=$(SCRIPT_DIR)/patch-kernel.sh
-SED:=$(STAGING_DIR)/bin/sed -i -e
-LINUX_DIR:=$(BUILD_DIR)/linux
-LINUX_HEADERS_DIR:=$(TOOL_BUILD_DIR)/linux
-
-
-HOST_ARCH:=$(shell $(HOSTCC) -dumpmachine | sed -e s'/-.*//' \
-	-e 's/sparc.*/sparc/' \
-	-e 's/arm.*/arm/g' \
-	-e 's/m68k.*/m68k/' \
-	-e 's/ppc/powerpc/g' \
-	-e 's/v850.*/v850/g' \
-	-e 's/sh[234]/sh/' \
-	-e 's/mips-.*/mips/' \
-	-e 's/mipsel-.*/mipsel/' \
-	-e 's/cris.*/cris/' \
-	-e 's/i[3-9]86/i386/' \
-	)
-GNU_HOST_NAME:=$(HOST_ARCH)-pc-linux-gnu
-TARGET_CONFIGURE_OPTS=PATH=$(TARGET_PATH) \
-		AR=$(TARGET_CROSS)ar \
-		AS=$(TARGET_CROSS)as \
-		LD=$(TARGET_CROSS)ld \
-		NM=$(TARGET_CROSS)nm \
-		CC=$(TARGET_CROSS)gcc \
-		GCC=$(TARGET_CROSS)gcc \
-		CXX=$(TARGET_CROSS)g++ \
-		RANLIB=$(TARGET_CROSS)ranlib
-
-ifeq ($(ENABLE_LOCALE),true)
-DISABLE_NLS:=
+TARGET_AR:=$(TARGET_CROSS)ar
+TARGET_RANLIB:=$(TARGET_CROSS)ranlib
+TARGET_CXX:=$(TARGET_CROSS)g++
+KPATCH:=$(SCRIPT_DIR)/patch-kernel.sh
+SED:=$(STAGING_DIR_HOST)/bin/sed -i -e
+CP:=cp -fpR
+LN:=ln -sf
+XARGS:=xargs -r
+
+INSTALL_BIN:=install -m0755
+INSTALL_DIR:=install -d -m0755
+INSTALL_DATA:=install -m0644
+INSTALL_CONF:=install -m0600
+
+TARGET_CC_NOCACHE:=$(TARGET_CC)
+TARGET_CXX_NOCACHE:=$(TARGET_CXX)
+HOSTCC_NOCACHE:=$(HOSTCC)
+HOSTCXX_NOCACHE:=$(HOSTCXX)
+export TARGET_CC_NOCACHE
+export TARGET_CXX_NOCACHE
+export HOSTCC_NOCACHE
+
+ifneq ($(CONFIG_CCACHE),)
+  TARGET_CC:= ccache_cc
+  TARGET_CXX:= ccache_cxx
+  HOSTCC:= ccache $(HOSTCC)
+  HOSTCXX:= ccache $(HOSTCXX)
+endif
+
+TARGET_CONFIGURE_OPTS = \
+  AR=$(TARGET_CROSS)ar \
+  AS="$(TARGET_CC) -c $(TARGET_ASFLAGS)" \
+  LD=$(TARGET_CROSS)ld \
+  NM=$(TARGET_CROSS)nm \
+  CC="$(TARGET_CC)" \
+  GCC="$(TARGET_CC)" \
+  CXX="$(TARGET_CXX)" \
+  RANLIB=$(TARGET_CROSS)ranlib \
+  STRIP=$(TARGET_CROSS)strip \
+  OBJCOPY=$(TARGET_CROSS)objcopy \
+  OBJDUMP=$(TARGET_CROSS)objdump \
+  SIZE=$(TARGET_CROSS)size
+
+# strip an entire directory
+ifneq ($(CONFIG_NO_STRIP),)
+  RSTRIP:=:
+  STRIP:=:
+else
+  ifneq ($(CONFIG_USE_STRIP),)
+    STRIP:=$(TARGET_CROSS)strip $(call qstrip,$(CONFIG_STRIP_ARGS))
+  else
+    ifneq ($(CONFIG_USE_SSTRIP),)
+      STRIP:=$(STAGING_DIR_HOST)/bin/sstrip
+    endif
+  endif
+  RSTRIP:= \
+    export CROSS="$(TARGET_CROSS)" \
+		$(if $(CONFIG_KERNEL_KALLSYMS),NO_RENAME=1) \
+		$(if $(CONFIG_KERNEL_PROFILING),KEEP_SYMBOLS=1); \
+    NM="$(TARGET_CROSS)nm" \
+    STRIP="$(STRIP)" \
+    STRIP_KMOD="$(SCRIPT_DIR)/strip-kmod.sh" \
+    $(SCRIPT_DIR)/rstrip.sh
+endif
+
+ifeq ($(CONFIG_ENABLE_LOCALE),true)
+  DISABLE_NLS:=--enable-nls
+else
+  DISABLE_NLS:=--disable-nls
+endif
+
+ifeq ($(CONFIG_IPV6),y)
+  DISABLE_IPV6:=
+else
+  DISABLE_IPV6:=--disable-ipv6
+endif
+
+ifeq ($(CONFIG_TAR_VERBOSITY),y)
+  TAR_OPTIONS:=-xvf -
 else
-DISABLE_NLS:=--disable-nls
+  TAR_OPTIONS:=-xf -
 endif
 
-ifeq ($(CONFIG_ENABLE_MULTILIB),y)
-MULTILIB:=--enable-multilib
+ifeq ($(CONFIG_BUILD_LOG),y)
+  BUILD_LOG:=1
 endif
 
-# invoke ipkg-build with some default options
-IPKG_BUILD := PATH="$(TARGET_PATH)" ipkg-build -c -o root -g root
-# where to build (and put) .ipk packages
-IPKG_TARGET_DIR := $(PACKAGE_DIR)
-IPKG:=IPKG_TMP=$(BUILD_DIR)/tmp IPKG_INSTROOT=$(TARGET_DIR) IPKG_CONF_DIR=$(STAGING_DIR)/etc IPKG_OFFLINE_ROOT=$(BUILD_DIR)/root $(SCRIPT_DIR)/ipkg -force-defaults -force-depends
-IPKG_STATE_DIR := $(TARGET_DIR)/usr/lib/ipkg
+define shvar
+V_$(subst .,_,$(subst -,_,$(subst /,_,$(1))))
+endef
+
+define shexport
+$(call shvar,$(1))=$$(call $(1))
+export $(call shvar,$(1))
+endef
+
+define include_mk
+$(eval -include $(if $(DUMP),,$(STAGING_DIR)/mk/$(strip $(1))))
+endef
 
-RSTRIP:=STRIP="$(STRIP)" STRIP_KMOD="$(TARGET_CROSS)strip --strip-unneeded --remove-section=.comment" $(SCRIPT_DIR)/rstrip.sh
+# Execute commands under flock
+# $(1) => The shell expression.
+# $(2) => The lock name. If not given, the global lock will be used.
+define locked
+	SHELL= \
+	$(STAGING_DIR_HOST)/bin/flock \
+		$(TMP_DIR)/.$(if $(2),$(strip $(2)),global).flock \
+		-c '$(subst ','\'',$(1))'
+endef
+
+# Recursively copy paths into another directory, purge dangling
+# symlinks before.
+# $(1) => File glob expression
+# $(2) => Destination directory
+define file_copy
+	for src_dir in $(sort $(foreach d,$(wildcard $(1)),$(dir $(d)))); do \
+		( cd $$src_dir; find -type f -or -type d ) | \
+			( cd $(2); while :; do \
+				read FILE; \
+				[ -z "$$FILE" ] && break; \
+				[ -L "$$FILE" ] || continue; \
+				echo "Removing symlink $(2)/$$FILE"; \
+				rm -f "$$FILE"; \
+			done; ); \
+	done; \
+	$(CP) $(1) $(2)
+endef
+
+# file extension
+ext=$(word $(words $(subst ., ,$(1))),$(subst ., ,$(1)))
 
 all:
+FORCE: ;
 .PHONY: FORCE
-FORCE:
+
+val.%:
+	@$(if $(filter undefined,$(origin $*)),\
+		echo "$* undefined" >&2, \
+		echo '$(subst ','"'"',$($*))' \
+	)
+
+var.%:
+	@$(if $(filter undefined,$(origin $*)),\
+		echo "$* undefined" >&2, \
+		echo "$*='"'$(subst ','"'\"'\"'"',$($*))'"'" \
+	)
+
+endif #__rules_inc