Merge pull request #56 from boschglobal/feature/cross_compile

Added crosscompile toolchain file for aarch64.

.devcontainer/Dockerfile

@@ -16,4 +16,5 @@ RUN if [ "${REINSTALL_CMAKE_VERSION_FROM_SOURCE}" != "none" ]; then \
 # [Optional] Uncomment this section to install additional packages.
 RUN apt-get update && export DEBIAN_FRONTEND=noninteractive \
      && apt-get -y install --no-install-recommends meson libcmocka0 \
-                      libcmocka-dev lcov gcovr gcc-aarch64-linux-gnu
+                      libcmocka-dev lcov gcovr gcc-aarch64-linux-gnu \
+                      libc6-dev-arm64-cross binutils-aarch64-linux-gnu

README.md

@@ -84,6 +84,13 @@ To install Open1722 on your system run:
 $ sudo make install
 ```
 
+To cross-compile for aarch64 (e.g. Raspberry Pi), you can use the [toolchain file](./aarch64.toolchain) we provided. Note that this requires a fresh build process with a new ```build``` folder.
+```
+$ sudo apt install gcc-aarch64-linux-gnu libc6-dev-arm64-cross binutils-aarch64-linux-gnu
+$ cmake .. -DCMAKE_TOOLCHAIN_FILE=../aarch64.toolchain
+$ make
+```
+
 ## AVTP Formats Support
 
 AVTP protocol defines several AVTPDU type formats (see Table 6 from IEEE 1722-2016 spec).

aarch64.toolchain

@@ -0,0 +1,8 @@
+set(CMAKE_SYSTEM_NAME Linux)
+set(CMAKE_SYSTEM_PROCESSOR arm64)
+
+set(triple aarch64-linux-gnu)
+
+set(CMAKE_C_COMPILER aarch64-linux-gnu-gcc)
+set(CMAKE_C_COMPILER_TARGET ${triple})
+