build/core/init.mk - platform/ndk - Git at Google

 # Copyright (C) 2009-2010 The Android Open Source Project
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
 # You may obtain a copy of the License at
 #
 #      http://www.apache.org/licenses/LICENSE-2.0
 #
 # Unless required by applicable law or agreed to in writing, software
 # distributed under the License is distributed on an "AS IS" BASIS,
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #

 # Initialization of the NDK build system. This file is included by
 # several build scripts.
 #

 # Define NDK_LOG in your environment to display log traces when
 # using the build scripts. See also the definition of ndk_log below.
 #
 NDK_LOG := $(strip $(NDK_LOG))

 # Check that we have at least GNU Make 3.81
 # We do this by detecting whether 'lastword' is supported
 #
 MAKE_TEST := $(lastword a b c d e f)
 ifneq ($(MAKE_TEST),f)
     $(error Android NDK: GNU Make version $(MAKE_VERSION) is too low (should be >= 3.81)
 endif
 ifdef NDK_LOG
     $(info Android NDK: GNU Make version $(MAKE_VERSION) detected)
 endif

 # NDK_ROOT *must* be defined and point to the root of the NDK installation
 NDK_ROOT := $(strip $(NDK_ROOT))
 ifndef NDK_ROOT
     $(error ERROR while including init.mk: NDK_ROOT must be defined !)
 endif
 ifneq ($(words $(NDK_ROOT)),1)
     $(info,The Android NDK installation path contains spaces: '$(NDK_ROOT)')
     $(error,Please fix the problem by reinstalling to a different location.)
 endif

 # ====================================================================
 #
 # Define a few useful variables and functions.
 # More stuff will follow in definitions.mk.
 #
 # ====================================================================

 # Used to output warnings and error from the library, it's possible to
 # disable any warnings or errors by overriding these definitions
 # manually or by setting NDK_NO_WARNINGS or NDK_NO_ERRORS

 __ndk_name    := Android NDK
 __ndk_info     = $(info $(__ndk_name): $1 $2 $3 $4 $5)
 __ndk_warning  = $(warning $(__ndk_name): $1 $2 $3 $4 $5)
 __ndk_error    = $(error $(__ndk_name): $1 $2 $3 $4 $5)

 ifdef NDK_NO_WARNINGS
 __ndk_warning :=
 endif
 ifdef NDK_NO_ERRORS
 __ndk_error :=
 endif

 # -----------------------------------------------------------------------------
 # Function : ndk_log
 # Arguments: 1: text to print when NDK_LOG is defined
 # Returns  : None
 # Usage    : $(call ndk_log,<some text>)
 # -----------------------------------------------------------------------------
 ifdef NDK_LOG
 ndk_log = $(info $(__ndk_name): $1)
 else
 ndk_log :=
 endif

 # ====================================================================
 #
 # Host system auto-detection.
 #
 # ====================================================================

 #
 # Determine host system and architecture from the environment
 #
 HOST_OS := $(strip $(HOST_OS))
 ifndef HOST_OS
     # On all modern variants of Windows (including Cygwin and Wine)
     # the OS environment variable is defined to 'Windows_NT'
     #
     # The value of PROCESSOR_ARCHITECTURE will be x86 or AMD64
     #
     ifeq ($(OS),Windows_NT)
         HOST_OS := windows
     else
         # For other systems, use the `uname` output
         UNAME := $(shell uname -s)
         ifneq (,$(findstring Linux,$(UNAME)))
             HOST_OS := linux
         endif
         ifneq (,$(findstring Darwin,$(UNAME)))
             HOST_OS := darwin
         endif
         # We should not be there, but just in case !
         ifneq (,$(findstring CYGWIN,$(UNAME)))
             HOST_OS := windows
         endif
         ifeq ($(HOST_OS),)
             $(call __ndk_info,Unable to determine HOST_OS from uname -s: $(UNAME))
             $(call __ndk_info,Please define HOST_OS in your environment.)
             $(call __ndk_error,Aborting.)
         endif
     endif
     $(call ndk_log,Host OS was auto-detected: $(HOST_OS))
 else
     $(call ndk_log,Host OS from environment: $(HOST_OS))
 endif

 HOST_ARCH := $(strip $(HOST_ARCH))
 ifndef HOST_ARCH
     ifeq ($(HOST_OS),windows)
         HOST_ARCH := $(PROCESSOR_ARCHITECTURE)
         ifeq ($(HOST_ARCH),AMD64)
             HOST_ARCH := x86
         endif
     else # HOST_OS != windows
         UNAME := $(shell uname -m)
         ifneq (,$(findstring 86,$(UNAME)))
             HOST_ARCH := x86
         endif
         # We should probably should not care at all
         ifneq (,$(findstring Power,$(UNAME)))
             HOST_ARCH := ppc
         endif
         ifeq ($(HOST_ARCH),)
             $(call __ndk_info,Unsupported host architecture: $(UNAME))
             $(call __ndk_error,Aborting)
         endif
     endif # HOST_OS != windows
     $(call ndk_log,Host CPU was auto-detected: $(HOST_ARCH))
 else
     $(call ndk_log,Host CPU from environment: $(HOST_ARCH))
 endif

 HOST_TAG := $(HOST_OS)-$(HOST_ARCH)

 # If we are on Windows, we need to check that we are not running
 # Cygwin 1.5, which is deprecated and won't run our toolchain
 # binaries properly.
 #
 ifeq ($(HOST_TAG),windows-x86)
     # On cygwin, 'uname -r' returns something like 1.5.23(0.225/5/3)
     # We recognize 1.5. as the prefix to look for then.
     CYGWIN_VERSION := $(shell uname -r)
     ifneq ($(filter XX1.5.%,XX$(CYGWIN_VERSION)),)
         $(call __ndk_info,You seem to be running Cygwin 1.5, which is not supported.)
         $(call __ndk_info,Please upgrade to Cygwin 1.7 or higher.)
         $(call __ndk_error,Aborting.)
     endif
     # special-case the host-tag
     HOST_TAG := windows
 endif
 $(call ndk_log,HOST_TAG set to $(HOST_TAG))

 #
 # Verify that the 'awk' tool has the features we need.
 # Both Nawk and Gawk do.
 #
 HOST_AWK := $(strip $(HOST_AWK))
 ifndef HOST_AWK
     HOST_AWK := awk
     $(call ndk_log,Host awk tool was auto-detected: $(HOST_AWK))
 else
     $(call ndk_log,Host awk tool from environment: $(HOST_AWK))
 endif

 # Location of all awk scripts we use
 BUILD_AWK := $(NDK_ROOT)/build/awk

 AWK_TEST := $(shell $(HOST_AWK) -f $(BUILD_AWK)/check-awk.awk)
 $(call ndk_log,Host awk test returned: $(AWK_TEST))
 ifneq ($(AWK_TEST),Pass)
     $(call __ndk_info,Host awk tool is outdated. Please define HOST_AWK to point to Gawk or Nawk !)
     $(call __ndk_error,Aborting.)
 endif

 # The location of the build system files
 BUILD_SYSTEM := $(NDK_ROOT)/build/core

 # Include common definitions
 include $(BUILD_SYSTEM)/definitions.mk

 # Location where all prebuilt binaries for a given host architectures
 # will be stored.
 HOST_PREBUILT := $(NDK_ROOT)/build/prebuilt/$(HOST_TAG)

 # ====================================================================
 #
 # Read all toolchain-specific configuration files.
 #
 # Each toolchain must have a corresponding config.mk file located
 # in build/toolchains/<name>/ that will be included here.
 #
 # Each one of these files should define the following variables:
 #   TOOLCHAIN_NAME   toolchain name (e.g. arm-eabi-4.2.1)
 #   TOOLCHAIN_ABIS   list of target ABIs supported by the toolchain.
 #
 # Then, it should include $(ADD_TOOLCHAIN) which will perform
 # book-keeping for the build system.
 #
 # ====================================================================

 # the build script to include in each toolchain config.mk
 ADD_TOOLCHAIN := $(BUILD_SYSTEM)/add-toolchain.mk

 # the list of all toolchains in this NDK
 NDK_ALL_TOOLCHAINS :=
 NDK_ALL_ABIS       :=

 TOOLCHAIN_CONFIGS := $(wildcard $(NDK_ROOT)/build/toolchains/*/config.mk)
 $(foreach _config_mk,$(TOOLCHAIN_CONFIGS),\
   $(eval include $(BUILD_SYSTEM)/add-toolchain.mk)\
 )

 NDK_ALL_TOOLCHAINS   := $(call uniq,$(NDK_ALL_TOOLCHAINS))
 NDK_ALL_ABIS         := $(call uniq,$(NDK_ALL_ABIS))

 # The default toolchain is now arm-eabi-4.4.0, however its
 # C++ compiler is a tad bit more pedantic with certain
 # constructs (e.g. templates) so allow users to switch back
 # to the old 4.2.1 instead if they really want to.
 #
 # NOTE: you won't get armeabi-v7a support though !
 #
 NDK_TOOLCHAIN := $(strip $(NDK_TOOLCHAIN))
 ifdef NDK_TOOLCHAIN
     # check that the toolchain name is supported
     $(if $(filter-out $(NDK_ALL_TOOLCHAINS),$(NDK_TOOLCHAIN)),\
       $(call __ndk_info,NDK_TOOLCHAIN is defined to the unsupported value $(NDK_TOOLCHAIN)) \
       $(call __ndk_info,Please use one of the following values: $(NDK_ALL_TOOLCHAINS))\
       $(call __ndk_error,Aborting)\
     ,)
     $(call ndk_log, Using specific toolchain $(NDK_TOOLCHAIN))
 endif

 $(call ndk_log, This NDK supports the following toolchains and target ABIs:)
 $(foreach tc,$(NDK_ALL_TOOLCHAINS),\
     $(call ndk_log, $(space)$(space)$(tc):  $(NDK_TOOLCHAIN.$(tc).abis))\
 )

 # ====================================================================
 #
 # Read all platform-specific configuration files.
 #
 # Each platform must be located in build/platforms/android-<apilevel>
 # where <apilevel> corresponds to an API level number, with:
 #   3 -> Android 1.5
 #   4 -> next platform release
 #
 # ====================================================================

 # The platform files were moved in the Android source tree from
 # $TOP/ndk/build/platforms to $TOP/development/ndk/platforms. However,
 # the official NDK release packages still place them under the old
 # location for now, so deal with this here
 #
 NDK_PLATFORMS_ROOT := $(strip $(NDK_PLATFORMS_ROOT))
 ifndef NDK_PLATFORMS_ROOT
     NDK_PLATFORMS_ROOT := $(strip $(wildcard $(NDK_ROOT)/build/platforms))
     ifndef NDK_PLATFORMS_ROOT
     NDK_PLATFORMS_ROOT := $(strip $(wildcard $(call parent-dir,$(NDK_ROOT))/development/ndk/platforms))
     endif

     ifndef NDK_PLATFORMS_ROOT
     $(call __ndk_info,Could not find platform files (headers and libraries))
         $(call __ndk_info,Please define NDK_PLATFORMS_ROOT to point to a valid)
         $(call __ndk_info,root directory for these.)
         $(call __ndk_error,Aborting)
     endif

     $(call ndk_log,Found platform root directory: $(NDK_PLATFORMS_ROOT))
 else
     ifeq ($(strip $(wildcard $(NDK_PLATFORMS_ROOT)/android-*)),)
         $(call __ndk_info,Your NDK_PLATFORMS_ROOT points to an invalid directory)
         $(call __ndk_info,Current value: $(NDK_PLATFORMS_ROOT))
         $(call __ndk_error,Aborting)
     endif
 endif

 NDK_ALL_PLATFORMS := $(strip $(notdir $(wildcard $(NDK_PLATFORMS_ROOT)/android-*)))
 $(call ndk_log,Found supported platforms: $(NDK_ALL_PLATFORMS))

 $(foreach _platform,$(NDK_ALL_PLATFORMS),\
   $(eval include $(BUILD_SYSTEM)/add-platform.mk)\
 )

 # we're going to find the maximum platform number of the form android-<number>
 # ignore others, which could correspond to special and experimental cases
 NDK_ALL_PLATFORM_LEVELS := $(filter android-%,$(NDK_ALL_PLATFORMS))
 NDK_ALL_PLATFORM_LEVELS := $(patsubst android-%,%,$(NDK_ALL_PLATFORM_LEVELS))
 $(call ndk_log,Found stable platform levels: $(NDK_ALL_PLATFORM_LEVELS))

 NDK_MAX_PLATFORM_LEVEL := 3
 $(foreach level,$(NDK_ALL_PLATFORM_LEVELS),\
   $(eval NDK_MAX_PLATFORM_LEVEL := $$(call max,$$(NDK_MAX_PLATFORM_LEVEL),$$(level)))\
 )
 $(call ndk_log,Found max platform level: $(NDK_MAX_PLATFORM_LEVEL))
	# Copyright (C) 2009-2010 The Android Open Source Project
	#
	# Licensed under the Apache License, Version 2.0 (the "License");
	# you may not use this file except in compliance with the License.
	# You may obtain a copy of the License at
	#
	# http://www.apache.org/licenses/LICENSE-2.0
	#
	# Unless required by applicable law or agreed to in writing, software
	# distributed under the License is distributed on an "AS IS" BASIS,
	# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	# See the License for the specific language governing permissions and
	# limitations under the License.
	#

	# Initialization of the NDK build system. This file is included by
	# several build scripts.
	#

	# Define NDK_LOG in your environment to display log traces when
	# using the build scripts. See also the definition of ndk_log below.
	#
	NDK_LOG := $(strip $(NDK_LOG))

	# Check that we have at least GNU Make 3.81
	# We do this by detecting whether 'lastword' is supported
	#
	MAKE_TEST := $(lastword a b c d e f)
	ifneq ($(MAKE_TEST),f)
	$(error Android NDK: GNU Make version $(MAKE_VERSION) is too low (should be >= 3.81)
	endif
	ifdef NDK_LOG
	$(info Android NDK: GNU Make version $(MAKE_VERSION) detected)
	endif

	# NDK_ROOT must be defined and point to the root of the NDK installation
	NDK_ROOT := $(strip $(NDK_ROOT))
	ifndef NDK_ROOT
	$(error ERROR while including init.mk: NDK_ROOT must be defined !)
	endif
	ifneq ($(words $(NDK_ROOT)),1)
	$(info,The Android NDK installation path contains spaces: '$(NDK_ROOT)')
	$(error,Please fix the problem by reinstalling to a different location.)
	endif

	# ====================================================================
	#
	# Define a few useful variables and functions.
	# More stuff will follow in definitions.mk.
	#
	# ====================================================================

	# Used to output warnings and error from the library, it's possible to
	# disable any warnings or errors by overriding these definitions
	# manually or by setting NDK_NO_WARNINGS or NDK_NO_ERRORS

	__ndk_name := Android NDK
	__ndk_info = $(info $(__ndk_name): $1 $2 $3 $4 $5)
	__ndk_warning = $(warning $(__ndk_name): $1 $2 $3 $4 $5)
	__ndk_error = $(error $(__ndk_name): $1 $2 $3 $4 $5)

	ifdef NDK_NO_WARNINGS
	__ndk_warning :=
	endif
	ifdef NDK_NO_ERRORS
	__ndk_error :=
	endif

	# -----------------------------------------------------------------------------
	# Function : ndk_log
	# Arguments: 1: text to print when NDK_LOG is defined
	# Returns : None
	# Usage : $(call ndk_log,<some text>)
	# -----------------------------------------------------------------------------
	ifdef NDK_LOG
	ndk_log = $(info $(__ndk_name): $1)
	else
	ndk_log :=
	endif

	# ====================================================================
	#
	# Host system auto-detection.
	#
	# ====================================================================

	#
	# Determine host system and architecture from the environment
	#
	HOST_OS := $(strip $(HOST_OS))
	ifndef HOST_OS
	# On all modern variants of Windows (including Cygwin and Wine)
	# the OS environment variable is defined to 'Windows_NT'
	#
	# The value of PROCESSOR_ARCHITECTURE will be x86 or AMD64
	#
	ifeq ($(OS),Windows_NT)
	HOST_OS := windows
	else
	# For other systems, use the `uname` output
	UNAME := $(shell uname -s)
	ifneq (,$(findstring Linux,$(UNAME)))
	HOST_OS := linux
	endif
	ifneq (,$(findstring Darwin,$(UNAME)))
	HOST_OS := darwin
	endif
	# We should not be there, but just in case !
	ifneq (,$(findstring CYGWIN,$(UNAME)))
	HOST_OS := windows
	endif
	ifeq ($(HOST_OS),)
	$(call __ndk_info,Unable to determine HOST_OS from uname -s: $(UNAME))
	$(call __ndk_info,Please define HOST_OS in your environment.)
	$(call __ndk_error,Aborting.)
	endif
	endif
	$(call ndk_log,Host OS was auto-detected: $(HOST_OS))
	else
	$(call ndk_log,Host OS from environment: $(HOST_OS))
	endif

	HOST_ARCH := $(strip $(HOST_ARCH))
	ifndef HOST_ARCH
	ifeq ($(HOST_OS),windows)
	HOST_ARCH := $(PROCESSOR_ARCHITECTURE)
	ifeq ($(HOST_ARCH),AMD64)
	HOST_ARCH := x86
	endif
	else # HOST_OS != windows
	UNAME := $(shell uname -m)
	ifneq (,$(findstring 86,$(UNAME)))
	HOST_ARCH := x86
	endif
	# We should probably should not care at all
	ifneq (,$(findstring Power,$(UNAME)))
	HOST_ARCH := ppc
	endif
	ifeq ($(HOST_ARCH),)
	$(call __ndk_info,Unsupported host architecture: $(UNAME))
	$(call __ndk_error,Aborting)
	endif
	endif # HOST_OS != windows
	$(call ndk_log,Host CPU was auto-detected: $(HOST_ARCH))
	else
	$(call ndk_log,Host CPU from environment: $(HOST_ARCH))
	endif

	HOST_TAG := $(HOST_OS)-$(HOST_ARCH)

	# If we are on Windows, we need to check that we are not running
	# Cygwin 1.5, which is deprecated and won't run our toolchain
	# binaries properly.
	#
	ifeq ($(HOST_TAG),windows-x86)
	# On cygwin, 'uname -r' returns something like 1.5.23(0.225/5/3)
	# We recognize 1.5. as the prefix to look for then.
	CYGWIN_VERSION := $(shell uname -r)
	ifneq ($(filter XX1.5.%,XX$(CYGWIN_VERSION)),)
	$(call __ndk_info,You seem to be running Cygwin 1.5, which is not supported.)
	$(call __ndk_info,Please upgrade to Cygwin 1.7 or higher.)
	$(call __ndk_error,Aborting.)
	endif
	# special-case the host-tag
	HOST_TAG := windows
	endif
	$(call ndk_log,HOST_TAG set to $(HOST_TAG))

	#
	# Verify that the 'awk' tool has the features we need.
	# Both Nawk and Gawk do.
	#
	HOST_AWK := $(strip $(HOST_AWK))
	ifndef HOST_AWK
	HOST_AWK := awk
	$(call ndk_log,Host awk tool was auto-detected: $(HOST_AWK))
	else
	$(call ndk_log,Host awk tool from environment: $(HOST_AWK))
	endif

	# Location of all awk scripts we use
	BUILD_AWK := $(NDK_ROOT)/build/awk

	AWK_TEST := $(shell $(HOST_AWK) -f $(BUILD_AWK)/check-awk.awk)
	$(call ndk_log,Host awk test returned: $(AWK_TEST))
	ifneq ($(AWK_TEST),Pass)
	$(call __ndk_info,Host awk tool is outdated. Please define HOST_AWK to point to Gawk or Nawk !)
	$(call __ndk_error,Aborting.)
	endif

	# The location of the build system files
	BUILD_SYSTEM := $(NDK_ROOT)/build/core

	# Include common definitions
	include $(BUILD_SYSTEM)/definitions.mk

	# Location where all prebuilt binaries for a given host architectures
	# will be stored.
	HOST_PREBUILT := $(NDK_ROOT)/build/prebuilt/$(HOST_TAG)

	# ====================================================================
	#
	# Read all toolchain-specific configuration files.
	#
	# Each toolchain must have a corresponding config.mk file located
	# in build/toolchains/<name>/ that will be included here.
	#
	# Each one of these files should define the following variables:
	# TOOLCHAIN_NAME toolchain name (e.g. arm-eabi-4.2.1)
	# TOOLCHAIN_ABIS list of target ABIs supported by the toolchain.
	#
	# Then, it should include $(ADD_TOOLCHAIN) which will perform
	# book-keeping for the build system.
	#
	# ====================================================================

	# the build script to include in each toolchain config.mk
	ADD_TOOLCHAIN := $(BUILD_SYSTEM)/add-toolchain.mk

	# the list of all toolchains in this NDK
	NDK_ALL_TOOLCHAINS :=
	NDK_ALL_ABIS :=

	TOOLCHAIN_CONFIGS := $(wildcard $(NDK_ROOT)/build/toolchains/*/config.mk)
	$(foreach _config_mk,$(TOOLCHAIN_CONFIGS),\
	$(eval include $(BUILD_SYSTEM)/add-toolchain.mk)\
	)

	NDK_ALL_TOOLCHAINS := $(call uniq,$(NDK_ALL_TOOLCHAINS))
	NDK_ALL_ABIS := $(call uniq,$(NDK_ALL_ABIS))

	# The default toolchain is now arm-eabi-4.4.0, however its
	# C++ compiler is a tad bit more pedantic with certain
	# constructs (e.g. templates) so allow users to switch back
	# to the old 4.2.1 instead if they really want to.
	#
	# NOTE: you won't get armeabi-v7a support though !
	#
	NDK_TOOLCHAIN := $(strip $(NDK_TOOLCHAIN))
	ifdef NDK_TOOLCHAIN
	# check that the toolchain name is supported
	$(if $(filter-out $(NDK_ALL_TOOLCHAINS),$(NDK_TOOLCHAIN)),\
	$(call __ndk_info,NDK_TOOLCHAIN is defined to the unsupported value $(NDK_TOOLCHAIN)) \
	$(call __ndk_info,Please use one of the following values: $(NDK_ALL_TOOLCHAINS))\
	$(call __ndk_error,Aborting)\
	,)
	$(call ndk_log, Using specific toolchain $(NDK_TOOLCHAIN))
	endif

	$(call ndk_log, This NDK supports the following toolchains and target ABIs:)
	$(foreach tc,$(NDK_ALL_TOOLCHAINS),\
	$(call ndk_log, $(space)$(space)$(tc): $(NDK_TOOLCHAIN.$(tc).abis))\
	)

	# ====================================================================
	#
	# Read all platform-specific configuration files.
	#
	# Each platform must be located in build/platforms/android-<apilevel>
	# where <apilevel> corresponds to an API level number, with:
	# 3 -> Android 1.5
	# 4 -> next platform release
	#
	# ====================================================================

	# The platform files were moved in the Android source tree from
	# $TOP/ndk/build/platforms to $TOP/development/ndk/platforms. However,
	# the official NDK release packages still place them under the old
	# location for now, so deal with this here
	#
	NDK_PLATFORMS_ROOT := $(strip $(NDK_PLATFORMS_ROOT))
	ifndef NDK_PLATFORMS_ROOT
	NDK_PLATFORMS_ROOT := $(strip $(wildcard $(NDK_ROOT)/build/platforms))
	ifndef NDK_PLATFORMS_ROOT
	NDK_PLATFORMS_ROOT := $(strip $(wildcard $(call parent-dir,$(NDK_ROOT))/development/ndk/platforms))
	endif

	ifndef NDK_PLATFORMS_ROOT
	$(call __ndk_info,Could not find platform files (headers and libraries))
	$(call __ndk_info,Please define NDK_PLATFORMS_ROOT to point to a valid)
	$(call __ndk_info,root directory for these.)
	$(call __ndk_error,Aborting)
	endif

	$(call ndk_log,Found platform root directory: $(NDK_PLATFORMS_ROOT))
	else
	ifeq ($(strip $(wildcard $(NDK_PLATFORMS_ROOT)/android-*)),)
	$(call __ndk_info,Your NDK_PLATFORMS_ROOT points to an invalid directory)
	$(call __ndk_info,Current value: $(NDK_PLATFORMS_ROOT))
	$(call __ndk_error,Aborting)
	endif
	endif

	NDK_ALL_PLATFORMS := $(strip $(notdir $(wildcard $(NDK_PLATFORMS_ROOT)/android-*)))
	$(call ndk_log,Found supported platforms: $(NDK_ALL_PLATFORMS))

	$(foreach _platform,$(NDK_ALL_PLATFORMS),\
	$(eval include $(BUILD_SYSTEM)/add-platform.mk)\
	)

	# we're going to find the maximum platform number of the form android-<number>
	# ignore others, which could correspond to special and experimental cases
	NDK_ALL_PLATFORM_LEVELS := $(filter android-%,$(NDK_ALL_PLATFORMS))
	NDK_ALL_PLATFORM_LEVELS := $(patsubst android-%,%,$(NDK_ALL_PLATFORM_LEVELS))
	$(call ndk_log,Found stable platform levels: $(NDK_ALL_PLATFORM_LEVELS))

	NDK_MAX_PLATFORM_LEVEL := 3
	$(foreach level,$(NDK_ALL_PLATFORM_LEVELS),\
	$(eval NDK_MAX_PLATFORM_LEVEL := $$(call max,$$(NDK_MAX_PLATFORM_LEVEL),$$(level)))\
	)
	$(call ndk_log,Found max platform level: $(NDK_MAX_PLATFORM_LEVEL))