Cross Compilation

---

CImg

Add the following code in CImg.h from https://github.com/dtschump/CImg.git to NOT use Xlib.h:

C++

#undef cimg_display
#define cimg_display 0

OpenCV

• Android: https://blog.csdn.net/u011178262/article/details/78209791#for_Android_127

Suitsparse

• Android: https://github.com/cggos/suitesparse_for_android

Google Ceres-Solver

ceres-solver-1.14.0 for Android

ref: How to Compile Ceres Android Library with NDK under Mac

替换 ceres-solver-1.14.0/jni 下 Application.mk 中的内容为

Makefile

APP_BUILD_SCRIPT := $(call my-dir)/Android.mk
APP_PROJECT_PATH := $(call my-dir)

APP_CPPFLAGS := -frtti -fexceptions -std=c++0x
APP_OPTIM := release

APP_STL := gnustl_static
APP_ABI := armeabi-v7a

在 ceres-solver-1.14.0/jni 下

Bash

EIGEN_PATH=/home/cg/projects/3rdparty/eigen-3.3.7 ndk-build -j1

编译完后，在 ceres-solver-1.14.0/obj/local/armeabi-v7a 下生成 libceres.a 文件。

FFTW

It is best to download official tarballs from http://fftw.org/, other than using its github repository!!!

for Android

Build Reference: fftw_android( from he-kai github )

Bash

#!/bin/sh
set -o errexit

# Compiles fftw3 for Android
# Make sure you have ANDROID_NDK defined in .bashrc or .bash_profile

PROJECT_ROOT="`pwd`/../"
INSTALL_DIR="$PROJECT_ROOT/jni/ndk-modules/fftw3"
mkdir -p $INSTALL_DIR

NDK_DIR=${ANDROID_NDK}

export PATH="$NDK_DIR/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin/:$PATH"
export SYS_ROOT="$NDK_DIR/platforms/android-9/arch-arm/"
export CC="arm-linux-androideabi-gcc --sysroot=$SYS_ROOT"
export CXX="arm-linux-androideabi-g++"
export LD="arm-linux-androideabi-ld"
export AR="arm-linux-androideabi-ar"
export RANLIB="arm-linux-androideabi-ranlib"
export STRIP="arm-linux-androideabi-strip"
export CFLAGS="-mfpu=neon -march=armv7-a -mfloat-abi=softfp" #use Thumb-2 instructs
export CXXFLAGS="-lstdc++"
export LDFLAGS="-lc -lgcc"

SRC_DIR="./fftw-3.3.3"
cd $SRC_DIR

##### configure & make & make install #####

./configure --host=arm-eabi --prefix=$INSTALL_DIR --enable-float --enable-neon

make -j$(nproc)
make install -j$(nproc)

exit 0