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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 $(NDK_ROOT)/build/core/init.mk
     41 
     42 # ====================================================================
     43 #
     44 # If NDK_PROJECT_PATH is not defined, find the application's project
     45 # path by looking at the manifest file in the current directory or
     46 # any of its parents. If none is found, try again with 'jni/Android.mk'
     47 #
     48 # Note that we first look at the current directory to avoid using
     49 # absolute NDK_PROJECT_PATH values. This reduces the length of all
     50 # source, object and binary paths that are passed to build commands.
     51 #
     52 # It turns out that some people use ndk-build to generate static
     53 # libraries without a full Android project tree.
     54 #
     55 # If NDK_PROJECT_PATH=null, ndk-build make no attempt to look for it, but does
     56 # need the following variables depending on NDK_PROJECT_PATH to be explicitly
     57 # specified (from the default, if any):
     58 #
     59 #   NDK_OUT
     60 #   NDK_LIBS_OUT
     61 #   APP_BUILD_SCRIPT
     62 #   NDK_DEBUG (optional, default to 0)
     63 #   Other APP_* used to be in Application.mk
     64 #
     65 # This behavior may be useful in an integrated build system.
     66 #
     67 # ====================================================================
     68 
     69 ifeq ($(HOST_OS),windows)
     70 # On Windows, defining host-dir-parent is a bit more tricky because the
     71 # GNU Make $(dir ...) function doesn't return an empty string when it
     72 # reaches the top of the directory tree, and we want to enforce this to
     73 # avoid infinite loops.
     74 #
     75 #   $(dir C:)     -> C:       (empty expected)
     76 #   $(dir C:/)    -> C:/      (empty expected)
     77 #   $(dir C:\)    -> C:\      (empty expected)
     78 #   $(dir C:/foo) -> C:/      (correct)
     79 #   $(dir C:\foo) -> C:\      (correct)
     80 #
     81 host-dir-parent = $(strip \
     82     $(eval __host_dir_node := $(patsubst %/,%,$(subst \,/,$1)))\
     83     $(eval __host_dir_parent := $(dir $(__host_dir_node)))\
     84     $(filter-out $1,$(__host_dir_parent))\
     85     )
     86 else
     87 host-dir-parent = $(patsubst %/,%,$(dir $1))
     88 endif
     89 
     90 find-project-dir = $(strip $(call find-project-dir-inner,$(abspath $1),$2))
     91 
     92 find-project-dir-inner = \
     93     $(eval __found_project_path := )\
     94     $(eval __find_project_path := $1)\
     95     $(eval __find_project_file := $2)\
     96     $(call find-project-dir-inner-2)\
     97     $(__found_project_path)
     98 
     99 find-project-dir-inner-2 = \
    100     $(call ndk_log,Looking for $(__find_project_file) in $(__find_project_path))\
    101     $(eval __find_project_manifest := $(strip $(wildcard $(__find_project_path)/$(__find_project_file))))\
    102     $(if $(__find_project_manifest),\
    103         $(call ndk_log,    Found it !)\
    104         $(eval __found_project_path := $(__find_project_path))\
    105         ,\
    106         $(eval __find_project_parent := $(call host-dir-parent,$(__find_project_path)))\
    107         $(if $(__find_project_parent),\
    108             $(eval __find_project_path := $(__find_project_parent))\
    109             $(call find-project-dir-inner-2)\
    110         )\
    111     )
    112 
    113 NDK_PROJECT_PATH := $(strip $(NDK_PROJECT_PATH))
    114 
    115 ifeq (null,$(NDK_PROJECT_PATH))
    116 
    117 $(call ndk_log,Make no attempt to look for NDK_PROJECT_PATH.)
    118 
    119 else
    120 
    121 # To keep paths as short as possible during the build, we first look if the
    122 # current directory is the top of our project path. If this is the case, we
    123 # will define NDK_PROJECT_PATH to simply '.'
    124 #
    125 # Otherwise, we will use find-project-dir which will first get the absolute
    126 # path of the current directory the climb back the hierarchy until we find
    127 # something. The result will always be a much longer definition for
    128 # NDK_PROJECT_PATH
    129 #
    130 ifndef NDK_PROJECT_PATH
    131     ifneq (,$(strip $(wildcard AndroidManifest.xml)))
    132         NDK_PROJECT_PATH := .
    133     else
    134         ifneq (,$(strip $(wildcard jni/Android.mk)))
    135             NDK_PROJECT_PATH := .
    136         endif
    137     endif
    138 endif
    139 ifndef NDK_PROJECT_PATH
    140     NDK_PROJECT_PATH := $(call find-project-dir,.,jni/Android.mk)
    141 endif
    142 ifndef NDK_PROJECT_PATH
    143     NDK_PROJECT_PATH := $(call find-project-dir,.,AndroidManifest.xml)
    144 endif
    145 ifndef NDK_PROJECT_PATH
    146     $(call __ndk_info,Could not find application project directory !)
    147     $(call __ndk_info,Please define the NDK_PROJECT_PATH variable to point to it.)
    148     $(call __ndk_error,Aborting)
    149 endif
    150 
    151 # Check that there are no spaces in the project path, or bad things will happen
    152 ifneq ($(words $(NDK_PROJECT_PATH)),1)
    153     $(call __ndk_info,Your Android application project path contains spaces: '$(NDK_PROJECT_PATH)')
    154     $(call __ndk_info,The Android NDK build cannot work here. Please move your project to a different location.)
    155     $(call __ndk_error,Aborting.)
    156 endif
    157 
    158 $(call ndk_log,Found project path: $(NDK_PROJECT_PATH))
    159 
    160 NDK_APPLICATION_MK := $(strip $(wildcard $(NDK_PROJECT_PATH)/jni/Application.mk))
    161 
    162 endif # NDK_PROJECT_PATH == null
    163 
    164 ifndef NDK_APPLICATION_MK
    165     NDK_APPLICATION_MK := $(NDK_ROOT)/build/core/default-application.mk
    166 endif
    167 
    168 
    169 # Place all generated intermediate files here
    170 NDK_APP_OUT := $(strip $(NDK_OUT))
    171 ifndef NDK_APP_OUT
    172   ifeq (null,$(NDK_PROJECT_PATH))
    173     $(call __ndk_info,NDK_PROJECT_PATH==null.  Please explicitly set NDK_OUT to directory for all generated intermediate files.)
    174     $(call __ndk_error,Aborting.)
    175   endif
    176   NDK_APP_OUT := $(NDK_PROJECT_PATH)/obj
    177 endif
    178 $(call ndk_log,Ouput path for intermediate files: $(NDK_APP_OUT))
    179 
    180 # Place all generated library files here.  This is rarely changed since aapt expects the default libs/
    181 NDK_APP_LIBS_OUT := $(strip $(NDK_LIBS_OUT))
    182 ifndef NDK_APP_LIBS_OUT
    183   ifeq (null,$(NDK_PROJECT_PATH))
    184     $(call __ndk_info,NDK_PROJECT_PATH==null.  Please explicitly set NDK_LIBS_OUT to directory for generated library files.)
    185     $(call __ndk_error,Aborting.)
    186   endif
    187   NDK_APP_LIBS_OUT := $(NDK_PROJECT_PATH)/libs
    188 endif
    189 $(call ndk_log,Ouput path for generated library files: $(NDK_APP_LIBS_OUT))
    190 
    191 # Fake an application named 'local'
    192 _app            := local
    193 _application_mk := $(NDK_APPLICATION_MK)
    194 NDK_APPS        := $(_app)
    195 
    196 include $(BUILD_SYSTEM)/add-application.mk
    197 
    198 # For cygwin, put generated dependency conversion script here
    199 # Do not define this variable for other host platforms
    200 #
    201 ifeq ($(HOST_OS),cygwin)
    202 NDK_DEPENDENCIES_CONVERTER := $(NDK_APP_OUT)/convert-dependencies.sh
    203 endif
    204 
    205 # If a goal is DUMP_xxx then we dump a variable xxx instead
    206 # of building anything
    207 #
    208 DUMP_VAR     := $(patsubst DUMP_%,%,$(filter DUMP_%,$(MAKECMDGOALS)))
    209 MAKECMDGOALS := $(filter-out DUMP_$(DUMP_VAR),$(MAKECMDGOALS))
    210 
    211 include $(BUILD_SYSTEM)/setup-imports.mk
    212 
    213 ifneq (,$(DUMP_VAR))
    214 
    215 # We only support a single DUMP_XXX goal at a time for now.
    216 ifneq ($(words $(DUMP_VAR)),1)
    217     $(call __ndk_error,!!TOO-MANY-DUMP-VARIABLES!!)
    218 endif
    219 
    220 $(foreach _app,$(NDK_APPS),\
    221   $(eval include $(BUILD_SYSTEM)/setup-app.mk)\
    222 )
    223 
    224 DUMP_$(DUMP_VAR):
    225 	@echo $($(DUMP_VAR))
    226 else
    227     # Build it
    228     include $(BUILD_SYSTEM)/build-all.mk
    229 endif
    230