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