How-to-install-openFPGALoader.md

+# for Ubuntu Linux on Intel x86 CPU
+
+the installation methed on ubuntu linux is listed below:
+
+### prepair dependency libs
+
+```shell
+sudo apt install \
+  libftdi1-2 \
+  libftdi1-dev \
+  libhidapi-hidraw0 \
+  libhidapi-dev \
+  libudev-dev \
+  zlib1g-dev \
+  cmake \
+  pkg-config \
+  make \
+  g++
+```
+
+### Then download source code and compile
+
+```shell
+git clone https://github.com/trabucayre/openFPGALoader
+cd openFPGALoader
+mkdir build
+cd build
+cmake .. # add -DBUILD_STATIC=ON to build a static version
+         # add -DENABLE_UDEV=OFF to disable udev support and -d /dev/xxx
+         # add -DENABLE_CMSISDAP=OFF to disable CMSIS DAP support
+make -j16
+
+```
+
+# for MacOS on Intel x86 or Apple Silicon M1/M2
+
+## First install "Homebrew" for MacOS
+
+open Terminal and input following commands.
+
+```shell
+/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"
+```
+
+## Then using homebrew to install openfpgaloader, still in terminal:
+
+```shell
+brew install openfpgaloader
+```
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