Ts75xx cross compiling

From Technologic Systems Manuals

While the onboard tools are recommended for development, some applications can reach a size where the compile time is not feasible. An example of this is the Linux Kernel which will take 5-10 minutes to compile on a typical X86 workstation, but it can take 7-15 hours to compile on the SBC depending on several factors. A hello world application in comparison will take only a couple seconds on the board.

Cross compiling has a complication in that the onboard libraries do not exactly match the cross compiler environment. Debian has around 15,000 to 20,000 packages available in the apt repositories, and there is no way to feasibly build a cross compiler to account for all of these libraries. If you are cross compiling you will need to have your application entirely self contained and linking to any third party libraries in your build system.

There are two toolchains that can be used depending on your application. Most applications should use this toolchain which compiles applications to use Debian's glibc 2.7 libraries. You can compile using this toolchain by calling the version of gcc in the archive:

 usr/local/opt/crosstool/arm-linux/gcc-3.3.4-glibc-2.3.2/bin/arm-linux-gcc

The second toolchain is using the uClibc compiler here. uClibc has some limitations in order to reduce the binary size, but will also work for many simple C applications. All of our included ctl applications are built using this toolchain. Using this compiler also allows you to compile binaries that do not rely on the Debian filesystem. While this does have a g++ compiler, we do not include any c++ support in the initrd. You can compile with this toolchain by calling this version of gcc in the archive:

 arm-uclibc-3.4.6/bin/arm-linux-uclibc-gcc
Note: We do not support third party cross compilers.
Note: The provided cross compilers are only for C development.