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https://git.archive.openwrt.org/15.05/openwrt.git
https://github.com/MediaTek-Labs/linkit-smart-7688-feed
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マニュアル：
https://github.com/MediaTek-Labs/linkit-smart-7688-feed
Develop Evn make step:
1. sudo git clone git://git.archive.openwrt.org/15.05/openwrt.git
2. sudo apt-get install git g++ make libncurses5-dev subversion libssl-dev gawk libxml-parser-perl unzip wget python xz-utils
3. git checkout c170d84bbe08e0f049c99d3f376aae170a36458e -b pre_3_18_84
4. cp feeds.conf.default feeds.conf
5. echo src-git linkit https://github.com/MediaTek-Labs/linkit-smart-7688-feed.git >> feeds.conf
6. ./scripts/feeds update
7. ./scripts/feeds install -a
8. make prereq
9. make menuconfig
Target System: Ralink RT288x/RT3xxx
Subtarget: MT7688 based boards
Target Profile: LinkIt7688
＊ 禁止設定：
Global build settings->Compile with support for patented functionality
Libraries->IoT->libupm
Libraries->libmraa
It compiles fine then
10. make V=99
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SDK download and compile source:
マニュアル：
https://docs.labs.mediatek.com/resource/linkit-smart-7688/en/tutorials/c-c++-programming/using-openwrt-sdk-to-build-c-c++-programs
＊ 先ずはsudo apt-get install ccacheコマンドを実行する。
＊ コマンド変更：
「make package/helloworld/compile」 ＝＞ 「make -j1 V=s」
SSID: jlabs-smart-office_5G
プロトコル: 802.11ac
セキュリティの種類: WPA2-パーソナル
ネットワーク帯域: 5 GHz
ネットワーク チャネル: 36
IPv4 アドレス: 192.168.2.110
IPv4 DNS サーバー: 192.168.2.1
製造元: Qualcomm Atheros Communications Inc.
説明: Qualcomm Atheros QCA9377 Wireless Network Adapter
ドライバーのバージョン: 12.0.0.307
物理アドレス (MAC): 40-9F-38-AB-BA-A5
Compile:
cmake: --> BeagleBone
1. mkdir buildBB
2./home/test/OpenWrt-SDK/ ..... あり
3. ./CMakeList.txt ..... 修正
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -I/home/test/OpenWrt-SDK/staging_dir/target-mipsel_24kec+dsp_uClibc-0.9.33.2/usr/include/")
set(OPENSSL_LIBRARIES "-L/home/test/OpenWrt-SDK/staging_dir/target-mipsel_24kec+dsp_uClibc-0.9.33.2/usr/lib/ -lssl -lcrypto -lusb-1.0")
4.cmake command:
/home/test/OpenWrt-SDK/staging_dir/host/bin/cmake -DCMAKE_C_COMPILER=/home/test/OpenWrt-SDK/staging_dir/toolchain-mipsel_24kec+dsp_gcc-4.8-linaro_uClibc-0.9.33.2/bin/mipsel-openwrt-linux-gcc ..
5. make
/home/test/openwrt/OpenWrt-SDK/staging_dir/toolchain-mipsel_24kec+dsp_gcc-4.8-linaro_uClibc-0.9.33.2/bin/mipsel-openwrt-linux-gcc
SET(CMAKE_C_COMPILER "/home/test/openwrt/Toolchain/toolchain/bin/mipsel-openwrt-linux-uclibc-gcc")
SET(CMAKE_CXX_COMPILER "/home/test/openwrt/Toolchain/toolchain/bin/mipsel-openwrt-linux-uclibc-g++")
SET(CMAKE_AR "/home/test/openwrt/Toolchain/toolchain/bin/mipsel-openwrt-linux-uclibc-ar")
SET(CMAKE_LINKER "/home/test/openwrt/Toolchain/toolchain/bin/mipsel-openwrt-linux-uclibc-ld")
SET(CMAKE_RANLIB "/home/test/openwrt/Toolchain/toolchain/bin/mipsel-openwrt-linux-ranlib")
SET(CMAKE_NM "/home/test/openwrt/Toolchain/toolchain/bin/mipsel-openwrt-linux-nm")
SET(CMAKE_OBJDUMP "/home/test/openwrt/Toolchain/toolchain/bin/mipsel-openwrt-linux-objdump")
SET(CMAKE_OBJCOPY "/home/test/openwrt/Toolchain/toolchain/bin/mipsel-openwrt-linux-objcopy")
SET(CMAKE_STRIP "/home/test/openwrt/Toolchain/toolchain/bin/mipsel-openwrt-linux-strip")
mipsel-openwrt-linux-uclibc-g++
解决警告，打开终端
sudo vim /etc/profile
在最后面加上
"export PATH=/home/test/openwrt/OpenWrt-SDK/staging_dir/toolchain-mipsel_24kec+dsp_gcc-4.8-linaro_uClibc-0.9.33.2/bin:$PATH
"
生成文件前，加上
export STAGING_DIR=/home/test/openwrt/OpenWrt-SDK/staging_dir
/home/test/openwrt/openwrt/staging_dir/host/bin/cmake -DCMAKE_C_COMPILER=/home/test/openwrt/openwrt/staging_dir/toolchain-mipsel_24kec+dsp_gcc-5.3.0_musl-1.1.14/bin/mipsel-openwrt-linux-musl-gcc .