问题
I am currently trying to build a native module using Android's NDK. My project consists of several source files (e.g.: FILENAME.c) and for each of them I need to declare a define in their CFLAGS (-DOPERATION_FILENAME).
In order to do that I need to dynamically fetch the name of the current target file of the Android NDK's cross-compiler and use it to for the define value.
I could not find any information about how to do this and the Makefile way (CFLAGS += -DOPERATION_echo $* | sed 's/_$$//') does not apply/work here.
My current Android.mk looks like this:
LOCAL_PATH:=$(call my-dir)
include $(CLEAR_VARS)
LOCAL_ARM_MODE := arm
LOCAL_MODULE := libmpn
LOCAL_SRC_FILES := \
<cut>
LOCAL_CFLAGS := \
-std=gnu99 \
-DHAVE_CONFIG_H \
-D__GMP_WITHIN_GMP \
-O2 \
-pedantic \
-fomit-frame-pointer \
-mfloat-abi=softfp \
-DOPERATION_`echo $* | sed 's/_$$//'`
include $(BUILD_SHARED_LIBRARY)
Does anyone know of a working way to get the file name of the current cross-compiler target in Android.mk? Thanks!
回答1:
In the beginning of your Android.mk, add the line that redefines get-src-file-target-cflags, like here:
get-src-file-target-cflags = $(LOCAL_SRC_FILES_TARGET_CFLAGS.$1) -DOPERATION_$(basename $1)
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_SRC_FILES := t.cpp qq.c
LOCAL_MODULE := tm
LOCAL_LDLIBS := -latomic
include $(BUILD_SHARED_LIBRARY)
You can put this line in Application.mk, if you choose.
来源：https://stackoverflow.com/questions/36721648/how-to-dynamically-get-the-current-compiler-target-file-name-in-android-mks-loc