feat(3psw): Add cross-compilation script of library.

1. Add 3 part software packages and its build script . 2. Add toolchain.

packages/build_packages.sh

@@ -0,0 +1,87 @@
+#!/bin/bash
+
+##CROSS_COMPILE=/opt/gcc-arm-10.3-2021.07-x86_64-arm-none-linux-gnueabihf/bin/arm-none-linux-gnueabihf-
+TOOLCHAIN_DIR="/opt/gcc-arm-10.3-2021.07-x86_64-arm-none-linux-gnueabihf/bin"
+CROSS_PREFIX="arm-none-linux-gnueabihf"
+
+readonly PKG_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+
+tar -zxvf cJSON-v1.7.18.tar.gz
+tar -zxvf freetype-2.13.2.tar.gz
+tar -zxvf glew-2.1.0.tgz
+tar -zxvf jpegsrc.v9c.tar.gz
+tar -zxvf libpng-1.6.34.tar.gz
+tar -zxvf zlib-1.2.11.tar.gz
+
+mkdir -p install
+
+export CC=${TOOLCHAIN_DIR}/${CROSS_PREFIX}-gcc
+export CXX=${TOOLCHAIN_DIR}/${CROSS_PREFIX}-g++
+export LD=${TOOLCHAIN_DIR}/${CROSS_PREFIX}-ld
+export AR=${TOOLCHAIN_DIR}/${CROSS_PREFIX}-ar
+export RANLIB=${TOOLCHAIN_DIR}/${CROSS_PREFIX}-ranlib
+
+export CFLAGS="-I${PKG_DIR}/install/include"
+export CPPFLAGS="-I${PKG_DIR}/install/include"
+export LDFLAGS="-L${PKG_DIR}/install/lib"
+
+# 1. zlib
+cd zlib-1.2.11
+./configure \
+    --prefix=${PKG_DIR}/install \
+    --host=${CROSS_PREFIX} \
+    --enable-shared \
+    --enable-static
+make
+make install
+cd ..
+
+# 2. libpng
+cd libpng-1.6.34
+./configure \
+    --prefix=${PKG_DIR}/install \
+    --host=${CROSS_PREFIX} \
+    --enable-shared \
+    --enable-static
+make
+make install
+cd ..
+
+# 3. JPEG
+cd jpeg-9c
+./configure \
+    --prefix=${PKG_DIR}/install \
+    --host=${CROSS_PREFIX} \
+    --enable-shared \
+    --enable-static
+make
+make install
+cd ..
+
+#4.Freetype
+cd freetype-2.13.2
+./configure \
+    --prefix=${PKG_DIR}/install \
+    --host=${CROSS_PREFIX} \
+    --enable-shared \
+    --enable-static \
+    --without-brotli
+make
+make install
+cd ..
+
+# 5. GLEW(DRM) 
+cd glew-2.1.0
+make
+make install GLEW_DEST=${PKG_DIR}/install
+cd ..
+
+#6. CJson 
+cd cJSON-v1.7.18
+mkdir -P build
+cd build
+cmake .. -DCMAKE_INSTALL_PREFIX=${PKG_DIR}/install -DBUILD_SHARED_LIBS=OFF #static complie
+make
+make install
+cd ../../
+

toolchain/README.txt

@@ -0,0 +1 @@
+Suggest: please decompress this toolchain to "/opt/" on your Ubuntu.