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      1 # Copyright (C) 2010 The Android Open Source Project
      2 #
      3 # Licensed under the Apache License, Version 2.0 (the "License");
      4 # you may not use this file except in compliance with the License.
      5 # You may obtain a copy of the License at
      6 #
      7 #      http://www.apache.org/licenses/LICENSE-2.0
      8 #
      9 # Unless required by applicable law or agreed to in writing, software
     10 # distributed under the License is distributed on an "AS IS" BASIS,
     11 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     12 # See the License for the specific language governing permissions and
     13 # limitations under the License.
     14 #
     15 
     16 # This file is designed to be called from the 'ndk-build' script
     17 # or similar wrapper tool.
     18 #
     19 
     20 # Detect the NDK installation path by processing this Makefile's location.
     21 # This assumes we are located under $NDK_ROOT/build/core/main.mk
     22 #
     23 NDK_ROOT := $(dir $(lastword $(MAKEFILE_LIST)))
     24 NDK_ROOT := $(strip $(NDK_ROOT:%build/core/=%))
     25 NDK_ROOT := $(subst \,/,$(NDK_ROOT))
     26 NDK_ROOT := $(NDK_ROOT:%/=%)
     27 ifeq ($(NDK_ROOT),)
     28     # for the case when we're invoked from the NDK install path
     29     NDK_ROOT := .
     30 endif
     31 ifeq ($(NDK_LOG),1)
     32     $(info Android NDK: NDK installation path auto-detected: '$(NDK_ROOT)')
     33 endif
     34 ifneq ($(words $(NDK_ROOT)),1)
     35     $(info Android NDK: You NDK installation path contains spaces.)
     36     $(info Android NDK: Please re-install to a different location to fix the issue !)
     37     $(error Aborting.)
     38 endif
     39 
     40 include $(NDK_ROOT)/build/core/init.mk
     41 
     42 # ====================================================================
     43 #
     44 # If NDK_PROJECT_PATH is not defined, find the application's project
     45 # path by looking at the manifest file in the current directory or
     46 # any of its parents. If none is found, try again with 'jni/Android.mk'
     47 #
     48 # Note that we first look at the current directory to avoid using
     49 # absolute NDK_PROJECT_PATH values. This reduces the length of all
     50 # source, object and binary paths that are passed to build commands.
     51 #
     52 # It turns out that some people use ndk-build to generate static
     53 # libraries without a full Android project tree.
     54 #
     55 # ====================================================================
     56 
     57 ifeq ($(HOST_OS),windows)
     58 # On Windows, defining host-dir-parent is a bit more tricky because the
     59 # GNU Make $(dir ...) function doesn't return an empty string when it
     60 # reaches the top of the directory tree, and we want to enforce this to
     61 # avoid infinite loops.
     62 #
     63 #   $(dir C:)     -> C:       (empty expected)
     64 #   $(dir C:/)    -> C:/      (empty expected)
     65 #   $(dir C:\)    -> C:\      (empty expected)
     66 #   $(dir C:/foo) -> C:/      (correct)
     67 #   $(dir C:\foo) -> C:\      (correct)
     68 #
     69 host-dir-parent = $(strip \
     70     $(eval __host_dir_node := $(patsubst %/,%,$(subst \,/,$1)))\
     71     $(eval __host_dir_parent := $(dir $(__host_dir_node)))\
     72     $(filter-out $1,$(__host_dir_parent))\
     73     )
     74 else
     75 host-dir-parent = $(patsubst %/,%,$(dir $1))
     76 endif
     77 
     78 find-project-dir = $(strip $(call find-project-dir-inner,$(abspath $1),$2))
     79 
     80 find-project-dir-inner = \
     81     $(eval __found_project_path := )\
     82     $(eval __find_project_path := $1)\
     83     $(eval __find_project_file := $2)\
     84     $(call find-project-dir-inner-2)\
     85     $(__found_project_path)
     86 
     87 find-project-dir-inner-2 = \
     88     $(call ndk_log,Looking for $(__find_project_file) in $(__find_project_path))\
     89     $(eval __find_project_manifest := $(strip $(wildcard $(__find_project_path)/$(__find_project_file))))\
     90     $(if $(__find_project_manifest),\
     91         $(call ndk_log,    Found it !)\
     92         $(eval __found_project_path := $(__find_project_path))\
     93         ,\
     94         $(eval __find_project_parent := $(call host-dir-parent,$(__find_project_path)))\
     95         $(if $(__find_project_parent),\
     96             $(eval __find_project_path := $(__find_project_parent))\
     97             $(call find-project-dir-inner-2)\
     98         )\
     99     )
    100 
    101 NDK_PROJECT_PATH := $(strip $(NDK_PROJECT_PATH))
    102 
    103 # To keep paths as short as possible during the build, we first look if the
    104 # current directory is the top of our project path. If this is the case, we
    105 # will define NDK_PROJECT_PATH to simply '.'
    106 #
    107 # Otherwise, we will use find-project-dir which will first get the absolute
    108 # path of the current directory the climb back the hierarchy until we find
    109 # something. The result will always be a much longer definition for
    110 # NDK_PROJECT_PATH
    111 #
    112 ifndef NDK_PROJECT_PATH
    113     ifneq (,$(strip $(wildcard AndroidManifest.xml)))
    114         NDK_PROJECT_PATH := .
    115     else
    116         ifneq (,$(strip $(wildcard jni/Android.mk)))
    117             NDK_PROJECT_PATH := .
    118         endif
    119     endif
    120 endif
    121 ifndef NDK_PROJECT_PATH
    122     NDK_PROJECT_PATH := $(call find-project-dir,.,jni/Android.mk)
    123 endif
    124 ifndef NDK_PROJECT_PATH
    125     NDK_PROJECT_PATH := $(call find-project-dir,.,AndroidManifest.xml)
    126 endif
    127 ifndef NDK_PROJECT_PATH
    128     $(call __ndk_info,Could not find application project directory !)
    129     $(call __ndk_info,Please define the NDK_PROJECT_PATH variable to point to it.)
    130     $(call __ndk_error,Aborting)
    131 endif
    132 
    133 # Check that there are no spaces in the project path, or bad things will happen
    134 ifneq ($(words $(NDK_PROJECT_PATH)),1)
    135     $(call __ndk_info,Your Android application project path contains spaces: '$(NDK_PROJECT_PATH)')
    136     $(call __ndk_info,The Android NDK build cannot work here. Please move your project to a different location.)
    137     $(call __ndk_error,Aborting.)
    138 endif
    139 
    140 NDK_APPLICATION_MK := $(strip $(wildcard $(NDK_PROJECT_PATH)/jni/Application.mk))
    141 ifndef NDK_APPLICATION_MK
    142     NDK_APPLICATION_MK := $(NDK_ROOT)/build/core/default-application.mk
    143 endif
    144 
    145 $(call ndk_log,Found project path: $(NDK_PROJECT_PATH))
    146 
    147 # Place all generated files here
    148 NDK_APP_OUT := $(strip $(NDK_OUT))
    149 ifndef NDK_APP_OUT
    150   NDK_APP_OUT := $(NDK_PROJECT_PATH)/obj
    151 endif
    152 $(call ndk_log,Ouput path: $(NDK_APP_OUT))
    153 
    154 # Fake an application named 'local'
    155 _app            := local
    156 _application_mk := $(NDK_APPLICATION_MK)
    157 NDK_APPS        := $(_app)
    158 
    159 include $(BUILD_SYSTEM)/add-application.mk
    160 
    161 # For cygwin, put generated dependency conversion script here
    162 # Do not define this variable for other host platforms
    163 #
    164 ifeq ($(HOST_OS),cygwin)
    165 NDK_DEPENDENCIES_CONVERTER := $(NDK_APP_OUT)/convert-dependencies.sh
    166 endif
    167 
    168 # If a goal is DUMP_xxx then we dump a variable xxx instead
    169 # of building anything
    170 #
    171 DUMP_VAR     := $(patsubst DUMP_%,%,$(filter DUMP_%,$(MAKECMDGOALS)))
    172 MAKECMDGOALS := $(filter-out DUMP_$(DUMP_VAR),$(MAKECMDGOALS))
    173 
    174 include $(BUILD_SYSTEM)/setup-imports.mk
    175 
    176 ifneq (,$(DUMP_VAR))
    177 
    178 # We only support a single DUMP_XXX goal at a time for now.
    179 ifneq ($(words $(DUMP_VAR)),1)
    180     $(call __ndk_error,!!TOO-MANY-DUMP-VARIABLES!!)
    181 endif
    182 
    183 $(foreach _app,$(NDK_APPS),\
    184   $(eval include $(BUILD_SYSTEM)/setup-app.mk)\
    185 )
    186 
    187 DUMP_$(DUMP_VAR):
    188 	@echo $($(DUMP_VAR))
    189 else
    190     # Build it
    191     include $(BUILD_SYSTEM)/build-all.mk
    192 endif
    193