Skip to content

Latest commit

 

History

History
67 lines (50 loc) · 2.1 KB

BUILD_CROSS.md

File metadata and controls

67 lines (50 loc) · 2.1 KB
Raw

Cross compiling SSF

Toolchain

First you need to obtain the toolchain for the target architecture. Choosing or building the right toolchain is outside of the scope of this document.

In the rest of this document we will use the arm-linux-gnueabihf toolchain which can be used to cross-compile applications for the Raspberry Pi 2/3 platform. On Debian/Ubuntu you can install it using the package manager.

# apt-get install g++-arm-linux-gnueabihf

Building dependencies

SSF depends on Boost and OpenSSL, these need to be cross-compiled separately. To make your life easier, use the scripts provided in builddeps/.

$ CROSS_PREFIX=arm-linux-gnueabihf- /path/to/ssf/source/builddeps/build_openssl.sh /path/to/openssl-1.0.2m.tar.gz 1.0.2m /path/to/openssl/prefix/
$ CROSS_PREFIX=arm-linux-gnueabihf- /path/to/ssf/source/builddeps/build_boost.sh /path/to/boost_1_65_1.tar.bz2 1_65_1 /path/to/boost/prefix

Building SSF

To cross-compile SSF, you need to tell CMake how to cross-compile. Use the cmake/arm-linux-gnueabihf.cmake configuration file, or customize it according to your needs.

The toolchain configuration file needs to look like this (adjust the toolchain tuple arm-linux-gnueabihf):

include(CMakeForceCompiler)
set(CMAKE_SYSTEM_NAME Linux)
CMAKE_FORCE_C_COMPILER(arm-linux-gnueabihf-gcc GNU)
CMAKE_FORCE_CXX_COMPILER(arm-linux-gnueabihf-g++ GNU)
set(CMAKE_SIZEOF_VOID_P 4)

NOTE: Due to an apparent bug in CMake depending on which version of GCC the toolchain is using, CMake can choose to ignore the CMAKE_CXX_STANDARD variable. You might want to add the following line to the toolchain configuration file:

set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=gnu++14")

Then, from the build directory, invoke cmake specifying your toolchain configuration file using the -DCMAKE_TOOLCHAIN_FILE parameter:

$ cmake /path/to/ssf/source -DUSE_STATIC_LIBS=ON -DCMAKE_TOOLCHAIN_FILE=arm-linux-gnueabihf.cmake -DBOOST_ROOT=/path/to/boost/prefix -DOPENSSL_ROOT_DIR=/path/to/openssl/prefix

Then proceed to build SSF:

$ make