Add generic package infrastructure

This new infrastructure allows to write simpler .mk files for packages
not using the autotools as their build system, by factorizing many
common steps (download, extract, patching), and will more easily allow
Buildroot-wide changes in how the packages are handled.

The main macro is called GENTARGETS and works similarly to the
AUTOTARGETS macro that already exists for autotools-based
packages. However, the set of variables to be defined before calling
the macro is different. Refer to the documentation for details.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/Makefile.in

@@ -349,3 +349,4 @@ endif
 X11_PREFIX:=$(call qstrip,$(BR2_X11_PREFIX))
 
 include package/Makefile.autotools.in
+include package/Makefile.package.in

package/Makefile.package.in

@@ -0,0 +1,397 @@
+################################################################################
+# Generic package infrastructure
+#
+# This file implements an infrastructure that eases development of
+# package .mk files. It should be used for all non-autotools based
+# packages. Autotools-based packages should use the specialized
+# autotools infrastructure in package/Makefile.autotools.in.
+#
+# See the Buildroot documentation for details on the usage of this
+# infrastructure
+#
+# In terms of implementation, this generic infrastructure requires the
+# .mk file to specify:
+#
+#   1. Metadata informations about the package: name, version,
+#      download URL, etc.
+#
+#   2. Description of the commands to be executed to configure, build
+#      and install the package
+#
+# The autotools infrastructure specializes this generic infrastructure
+# by already implementing the configure, build and install steps.
+################################################################################
+
+# UPPERCASE Macro -- transform its argument to uppercase and replace dots and
+# hyphens to underscores
+UPPERCASE = $(shell echo $(1) | tr "a-z.-" "A-Z__")
+
+# Define extrators for different archive suffixes
+INFLATE.bz2 = $(BZCAT)
+INFLATE.gz  = $(ZCAT)
+INFLATE.tbz = $(BZCAT)
+INFLATE.tgz = $(ZCAT)
+INFLATE.tar = cat
+
+# MESSAGE Macro -- display a message in bold type
+MESSAGE = echo "$(TERM_BOLD)>>> $($(PKG)_NAME) $($(PKG)_VERSION) $(1)$(TERM_RESET)"
+TERM_BOLD := $(shell tput smso)
+TERM_RESET := $(shell tput rmso)
+
+################################################################################
+# DOWNLOAD -- Download helper. Will try to download source from:
+# 1) BR2_PRIMARY_SITE if enabled
+# 2) Download site
+# 3) BR2_BACKUP_SITE if enabled
+#
+# Argument 1 is the source location
+# Argument 2 is the source filename
+#
+# E.G. use like this:
+# $(call DOWNLOAD,$(FOO_SITE),$(FOO_SOURCE))
+################################################################################
+
+# support make source-check/external-deps
+ifneq ($(SPIDER),)
+DOWNLOAD=$(WGET) -P $(DL_DIR) $(1)/$(2)
+else
+define DOWNLOAD
+	$(Q)test -e $(DL_DIR)/$(2) || \
+	for site in $(call qstrip,$(BR2_PRIMARY_SITE)) $(1) $(call qstrip,$(BR2_BACKUP_SITE)); \
+	do $(WGET) -P $(DL_DIR) $$site/$(2) && exit; done
+endef
+endif
+
+# Utility programs used to build packages
+TAR ?= tar
+
+# Automatically detect tar --strip-path/components option
+TAR_STRIP_COMPONENTS := \
+  $(shell $(TAR) --help | grep strip-path > /dev/null ; \
+  if test $$? = 0 ; then \
+   echo '--strip-path' ; \
+  else \
+   echo '--strip-components' ; \
+  fi)
+
+# Needed for the foreach loops to loop over the list of hooks, so that
+# each hook call is properly separated by a newline.
+define sep
+
+
+endef
+
+################################################################################
+# Implicit targets -- produce a stamp file for each step of a package build
+################################################################################
+
+# Retrieve the archive
+$(BUILD_DIR)/%/.stamp_downloaded:
+# support make source-check/external-deps
+ifeq ($(SPIDER),)
+# Only show the download message if it isn't already downloaded
+	$(Q)(test -e $(DL_DIR)/$($(PKG)_SOURCE) && \
+		(test -z $($(PKG)_PATCH) || test -e $(DL_DIR)$($(PKG)_PATCH))) || \
+		$(call MESSAGE,"Downloading")
+endif
+	$(call DOWNLOAD,$($(PKG)_SITE),$($(PKG)_SOURCE))
+	$(if $($(PKG)_PATCH),$(call DOWNLOAD,$($(PKG)_SITE),$($(PKG)_PATCH)))
+ifeq ($(SPIDER),)
+	$(Q)mkdir -p $(@D)
+	$(Q)touch $@
+endif
+
+# Unpack the archive
+$(BUILD_DIR)/%/.stamp_extracted:
+	@$(call MESSAGE,"Extracting")
+	$(Q)mkdir -p $(@D)
+	$(Q)$(INFLATE$(suffix $($(PKG)_SOURCE))) $(DL_DIR)/$($(PKG)_SOURCE) | \
+	$(TAR) $(TAR_STRIP_COMPONENTS)=1 -C $(@D) $(TAR_OPTIONS) -
+# some packages have messed up permissions inside
+	$(Q)chmod -R ug+rw $(@D)
+	$(foreach hook,$($(PKG)_POST_EXTRACT_HOOKS),$(call $(hook))$(sep))
+	$(Q)touch $@
+
+# Patch
+#
+# The NOHOSTPKG variable is the uppercased package name, without the
+# HOST_ prefix, even for host packages. This allows to find the
+# patches in the package directory, because $($(NOHOSTPKG)_NAME)
+# expands to the package directory name.
+#
+$(BUILD_DIR)/%/.stamp_patched: NAMEVER = $($(NOHOSTPKG)_NAME)-$($(PKG)_VERSION)
+$(BUILD_DIR)/%/.stamp_patched:
+	@$(call MESSAGE,"Patching $($(PKG)_DIR_PREFIX)/$($(PKG)_NAME)")
+	$(if $($(PKG)_PATCH),toolchain/patch-kernel.sh $(@D) $(DL_DIR) $($(PKG)_PATCH))
+	$(Q)( \
+	if test -d $($(PKG)_DIR_PREFIX)/$($(NOHOSTPKG)_NAME); then \
+	  if test "$(wildcard $($(PKG)_DIR_PREFIX)/$($(NOHOSTPKG)_NAME)/$(NAMEVER)*.patch*)"; then \
+	    toolchain/patch-kernel.sh $(@D) $($(PKG)_DIR_PREFIX)/$($(NOHOSTPKG)_NAME) $(NAMEVER)\*.patch $(NAMEVER)\*.patch.$(ARCH) || exit 1; \
+	  else \
+	    toolchain/patch-kernel.sh $(@D) $($(PKG)_DIR_PREFIX)/$($(NOHOSTPKG)_NAME) $($(NOHOSTPKG)_NAME)\*.patch $($(NOHOSTPKG)_NAME)\*.patch.$(ARCH) || exit 1; \
+	    if test -d $($(PKG)_DIR_PREFIX)/$($(PKG)_NAME)/$(NAMEVER); then \
+	      toolchain/patch-kernel.sh $(@D) $($(PKG)_DIR_PREFIX)/$($(NOHOSTPKG)_NAME)/$(NAMEVER) \*.patch \*.patch.$(ARCH) || exit 1; \
+	    fi; \
+	  fi; \
+	fi; \
+	)
+	$(foreach hook,$($(PKG)_POST_PATCH_HOOKS),$(call $(hook))$(sep))
+	$(Q)touch $@
+
+# Configure
+$(BUILD_DIR)/%/.stamp_configured:
+	@$(call MESSAGE,"Configuring")
+	$($(PKG)_CONFIGURE_CMDS)
+	$(foreach hook,$($(PKG)_POST_CONFIGURE_HOOKS),$(call $(hook))$(sep))
+	$(Q)touch $@
+
+# Build
+$(BUILD_DIR)/%/.stamp_built::
+	@$(call MESSAGE,"Building")
+	$($(PKG)_BUILD_CMDS)
+	$(foreach hook,$($(PKG)_POST_BUILD_HOOKS),$(call $(hook))$(sep))
+	$(Q)touch $@
+
+# Install to host dir
+$(BUILD_DIR)/%/.stamp_host_installed:
+	@$(call MESSAGE,'Installing to host directory')
+	$($(PKG)_INSTALL_CMDS)
+	$(foreach hook,$($(PKG)_POST_INSTALL_HOOKS),$(call $(hook))$(sep))
+	$(Q)touch $@
+
+# Install to staging dir
+$(BUILD_DIR)/%/.stamp_staging_installed:
+	@$(call MESSAGE,'Installing to staging directory')
+	$($(PKG)_INSTALL_STAGING_CMDS)
+	$(foreach hook,$($(PKG)_POST_INSTALL_STAGING_HOOKS),$(call $(hook))$(sep))
+	$(Q)touch $@
+
+# Install to target dir
+$(BUILD_DIR)/%/.stamp_target_installed:
+	@$(call MESSAGE,"Installing to target")
+	$($(PKG)_INSTALL_TARGET_CMDS)
+	$(foreach hook,$($(PKG)_POST_INSTALL_TARGET_HOOKS),$(call $(hook))$(sep))
+	$(if $(BR2_HAVE_MANPAGES),,for d in man share/man; do \
+		rm -rf $(TARGET_DIR)/$$d $(TARGET_DIR)/usr/$$d; \
+	done)
+	$(if $(BR2_HAVE_INFOPAGES),,for d in info share/info; do \
+		rm -rf $(TARGET_DIR)/$$d $(TARGET_DIR)/usr/$$d; \
+	done)
+	$(if $(BR2_HAVE_DOCUMENTATION),,for d in doc share/doc; do \
+		rm -rf $(TARGET_DIR)/$$d $(TARGET_DIR)/usr/$$d; \
+	done)
+	$(Q)touch $@
+
+# Clean package
+$(BUILD_DIR)/%/.stamp_cleaned:
+	@$(call MESSAGE,"Cleaning up")
+	$($(PKG)_CLEAN_CMDS)
+	rm -f $(@D)/.stamp_built
+
+# Uninstall package from target and staging
+$(BUILD_DIR)/%/.stamp_uninstalled:
+	@$(call MESSAGE,"Uninstalling")
+	$($(PKG)_UNINSTALL_STAGING_CMDS)
+	rm -f $($(PKG)_TARGET_INSTALL_STAGING)
+	$($(PKG)_UNINSTALL_TARGET_CMDS)
+	rm -f $($(PKG)_TARGET_INSTALL_TARGET) $($(PKG)_HOOK_POST_INSTALL)
+
+# Remove package sources
+$(BUILD_DIR)/%/.stamp_dircleaned:
+	rm -Rf $(@D)
+
+################################################################################
+# GENTARGETS_INNER -- generates the make targets needed to build a
+# generic package
+#
+#  argument 1 is the lowercase package name
+#  argument 2 is the uppercase package name, including an HOST_ prefix
+#             for host packages
+#  argument 3 is the uppercase package name, without the HOST_ prefix
+#             for host packages
+#  argument 4 is the package directory prefix
+#  argument 5 is the type (target or host)
+################################################################################
+
+define GENTARGETS_INNER
+
+# Define default values for various package-related variables, if not
+# already defined. For some variables (version, source, site and
+# subdir), if they are undefined, we try to see if a variable without
+# the HOST_ prefix is defined. If so, we use such a variable, so that
+# these informations have only to be specified once, for both the
+# target and host packages of a given .mk file.
+
+$(2)_TYPE                       =  $(5)
+$(2)_NAME			=  $(1)
+
+ifndef $(2)_VERSION
+ ifdef $(3)_VERSION
+  $(2)_VERSION = $($(3)_VERSION)
+ else
+  $(2)_VERSION = undefined
+ endif
+endif
+
+$(2)_DIR			=  $$(BUILD_DIR)/$(1)-$$($(2)_VERSION)
+
+ifndef $(2)_SOURCE
+ ifdef $(3)_SOURCE
+  $(2)_SOURCE = $($(3)_SOURCE)
+ else
+  $(2)_SOURCE			?= $(1)-$$($(2)_VERSION).tar.gz
+ endif
+endif
+
+ifndef $(2)_PATCH
+ ifdef $(3)_PATCH
+  $(2)_PATCH = $($(3)_PATCH)
+ endif
+endif
+
+ifndef $(2)_SITE
+ ifdef $(3)_SITE
+  $(2)_SITE = $($(3)_SITE)
+ else
+  $(2)_SITE			?= \
+	http://$$(BR2_SOURCEFORGE_MIRROR).dl.sourceforge.net/sourceforge/$(1)
+ endif
+endif
+
+$(2)_DEPENDENCIES		?=
+$(2)_INSTALL_STAGING		?= NO
+$(2)_INSTALL_TARGET		?= YES
+$(2)_DIR_PREFIX			= $(if $(4),$(4),$(TOP_SRCDIR)/package)
+
+# define sub-target stamps
+$(2)_TARGET_INSTALL_TARGET =	$$($(2)_DIR)/.stamp_target_installed
+$(2)_TARGET_INSTALL_STAGING =	$$($(2)_DIR)/.stamp_staging_installed
+$(2)_TARGET_INSTALL_HOST =      $$($(2)_DIR)/.stamp_host_installed
+$(2)_TARGET_BUILD =		$$($(2)_DIR)/.stamp_built
+$(2)_TARGET_CONFIGURE =		$$($(2)_DIR)/.stamp_configured
+$(2)_TARGET_PATCH =		$$($(2)_DIR)/.stamp_patched
+$(2)_TARGET_EXTRACT =		$$($(2)_DIR)/.stamp_extracted
+$(2)_TARGET_SOURCE =		$$($(2)_DIR)/.stamp_downloaded
+$(2)_TARGET_UNINSTALL =		$$($(2)_DIR)/.stamp_uninstalled
+$(2)_TARGET_CLEAN =		$$($(2)_DIR)/.stamp_cleaned
+$(2)_TARGET_DIRCLEAN =		$$($(2)_DIR)/.stamp_dircleaned
+
+# new-style hooks
+$(2)_POST_EXTRACT_HOOKS         ?=
+$(2)_POST_PATCH_HOOKS           ?=
+$(2)_POST_CONFIGURE_HOOKS       ?=
+$(2)_POST_BUILD_HOOKS           ?=
+$(2)_POST_INSTALL_HOOKS         ?=
+$(2)_POST_INSTALL_STAGING_HOOKS ?=
+$(2)_POST_INSTALL_TARGET_HOOKS  ?=
+
+# old-style hooks
+$(2)_HOOK_POST_EXTRACT =	$$($(2)_DIR)/.stamp_hook_post_extract
+$(2)_HOOK_POST_CONFIGURE =	$$($(2)_DIR)/.stamp_hook_post_configure
+$(2)_HOOK_POST_BUILD =		$$($(2)_DIR)/.stamp_hook_post_build
+$(2)_HOOK_POST_INSTALL =	$$($(2)_DIR)/.stamp_hook_post_install
+
+# human-friendly targets and target sequencing
+$(1):			$(1)-install
+
+ifeq ($$($(2)_TYPE),host)
+$(1)-install:	        $(1)-install-host $$($(2)_HOOK_POST_INSTALL)
+else
+$(1)-install:		$(1)-install-staging $(1)-install-target \
+			$$($(2)_HOOK_POST_INSTALL)
+endif
+
+ifeq ($$($(2)_INSTALL_TARGET),YES)
+$(1)-install-target:	$(1)-build \
+			$$($(2)_TARGET_INSTALL_TARGET)
+else
+$(1)-install-target:
+endif
+
+ifeq ($$($(2)_INSTALL_STAGING),YES)
+$(1)-install-staging:	$(1)-build \
+			$$($(2)_TARGET_INSTALL_STAGING)
+else
+$(1)-install-staging:
+endif
+
+$(1)-install-host:      $(1)-build $$($(2)_TARGET_INSTALL_HOST)
+
+$(1)-build:		$(1)-configure \
+			$$($(2)_TARGET_BUILD) \
+			$$($(2)_HOOK_POST_BUILD)
+
+$(1)-configure:		$(1)-patch \
+			$$($(2)_TARGET_CONFIGURE) \
+			$$($(2)_HOOK_POST_CONFIGURE)
+
+$(1)-patch:		$(1)-extract $$($(2)_TARGET_PATCH)
+
+$(1)-extract:		$(1)-depends \
+			$$($(2)_TARGET_EXTRACT) \
+			$$($(2)_HOOK_POST_EXTRACT)
+
+$(1)-depends:		$(1)-source $$($(2)_DEPENDENCIES)
+
+$(1)-source:		$$($(2)_TARGET_SOURCE)
+
+$(1)-uninstall:		$(1)-configure $$($(2)_TARGET_UNINSTALL)
+
+$(1)-clean:		$(1)-uninstall \
+			$$($(2)_TARGET_CLEAN)
+
+$(1)-dirclean:		$$($(2)_TARGET_DIRCLEAN)
+
+# define the PKG variable for all targets, containing the
+# uppercase package variable prefix
+$$($(2)_TARGET_INSTALL_TARGET):		PKG=$(2)
+$$($(2)_TARGET_INSTALL_STAGING):	PKG=$(2)
+$$($(2)_TARGET_INSTALL_HOST):           PKG=$(2)
+$$($(2)_TARGET_BUILD):			PKG=$(2)
+$$($(2)_TARGET_CONFIGURE):		PKG=$(2)
+$$($(2)_TARGET_PATCH):			PKG=$(2)
+$$($(2)_TARGET_PATCH):			NOHOSTPKG=$(3)
+$$($(2)_TARGET_EXTRACT):		PKG=$(2)
+$$($(2)_TARGET_SOURCE):			PKG=$(2)
+$$($(2)_TARGET_UNINSTALL):		PKG=$(2)
+$$($(2)_TARGET_CLEAN):			PKG=$(2)
+$$($(2)_TARGET_DIRCLEAN):		PKG=$(2)
+$$($(2)_HOOK_POST_EXTRACT):		PKG=$(2)
+$$($(2)_HOOK_POST_CONFIGURE):		PKG=$(2)
+$$($(2)_HOOK_POST_BUILD):		PKG=$(2)
+$$($(2)_HOOK_POST_INSTALL):		PKG=$(2)
+
+# define hook targets
+# default hook behaviour: do nothing
+$$($(2)_HOOK_POST_EXTRACT):
+$$($(2)_HOOK_POST_CONFIGURE):
+$$($(2)_HOOK_POST_BUILD):
+$$($(2)_HOOK_POST_INSTALL):
+
+# add package to the general list of targets if requested by the buildroot
+# configuration
+
+ifeq ($$(BR2_PACKAGE_$(2)),y)
+TARGETS += $(1)
+endif
+endef
+
+################################################################################
+# GENTARGETS -- the target generator macro for generic packages
+#
+# Argument 1 is the package directory prefix [mandatory]
+# Argument 2 is the lowercase package name   [mandatory]
+# Argument 3 is "target" or "host"           [optional, default: "target"]
+################################################################################
+
+define GENTARGETS
+ifeq ($(3),host)
+# In the case of host packages, turn the package name "pkg" into "host-pkg"
+$(call GENTARGETS_INNER,$(3)-$(2),$(call UPPERCASE,$(3)-$(2)),$(call UPPERCASE,$(2)),$(1),host)
+else
+# In the case of target packages, keep the package name "pkg"
+$(call GENTARGETS_INNER,$(2),$(call UPPERCASE,$(2)),$(call UPPERCASE,$(2)),$(1),target)
+endif
+endef
+
+# :mode=makefile: