1# Copyright (C) 2009 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# Handle local variable expor/import during the build 16# 17 18$(call assert-defined,LOCAL_MODULE) 19 20# For LOCAL_CFLAGS, LOCAL_CPPFLAGS and LOCAL_C_INCLUDES, we need 21# to use the exported definitions of the closure of all modules 22# we depend on. 23# 24# I.e. If module 'foo' depends on 'bar' which depends on 'zoo', 25# then 'foo' will get the CFLAGS/CPPFLAGS/C_INCLUDES of both 'bar' 26# and 'zoo' 27# 28 29all_depends := $(call module-get-all-dependencies,$(LOCAL_MODULE)) 30all_depends := $(filter-out $(LOCAL_MODULE),$(all_depends)) 31 32imported_CFLAGS := $(call module-get-listed-export,$(all_depends),CFLAGS) 33imported_CPPFLAGS := $(call module-get-listed-export,$(all_depends),CPPFLAGS) 34imported_C_INCLUDES := $(call module-get-listed-export,$(all_depends),C_INCLUDES) 35 36ifdef NDK_DEBUG_IMPORTS 37 $(info Imports for module $(LOCAL_MODULE):) 38 $(info CFLAGS='$(imported_CFLAGS)') 39 $(info CPPFLAGS='$(imported_CPPFLAGS)') 40 $(info C_INCLUDES='$(imported_C_INCLUDES)') 41 $(info All depends='$(all_depends)') 42endif 43 44# 45# The imported compiler flags are prepended to their LOCAL_XXXX value 46# (this allows the module to override them). 47# 48LOCAL_CFLAGS := $(strip $(imported_CFLAGS) $(LOCAL_CFLAGS)) 49LOCAL_CPPFLAGS := $(strip $(imported_CPPFLAGS) $(LOCAL_CPPFLAGS)) 50 51# 52# The imported include directories are appended to their LOCAL_XXX value 53# (this allows the module to override them) 54# 55LOCAL_C_INCLUDES := $(strip $(LOCAL_C_INCLUDES) $(imported_C_INCLUDES)) 56 57# Similarly, you want the imported flags to appear _after_ the LOCAL_LDLIBS 58# due to the way Unix linkers work (depending libraries must appear before 59# dependees on final link command). 60# 61imported_LDLIBS := $(call module-get-listed-export,$(all_depends),LDLIBS) 62 63LOCAL_LDLIBS := $(strip $(LOCAL_LDLIBS) $(imported_LDLIBS)) 64 65# We're done here 66