RG350
build fcalc
步驟如下：
$ cd $ wget https://github.com/steward-fu/rg350/releases/download/v1.0/gcw0-toolchain.tar.gz $ tar xvf gcw0-toolchain.tar.gz $ sudo mv gcw0-toolchain /opt $ export PATH=$PATH:/opt/gcw0-toolchain/usr/bin $ wget https://github.com/steward-fu/rg350/releases/download/v1.1/fcalc.tar.gz $ tar xvf fcalc.tar.gz $ cd fcalc $ make