Build instructions

Regular build

To be able to build the library on a Raspberry Pi itself, you need to do the following:

• Install the packages tcl-dev, libi2c-dev, and autoconf, if necessary: sudo apt install tcl-dev libi2c-dev autoconf
• Download the piio sources.
• Unpack the tarball: tar xvf piio.tar.gz
• Go to the source directory: cd piio
• Get the standard tclconfig files: wget -qO- http://core.tcl.tk/tclconfig/tarball/tclconfig.tar.gz | tar xzv
• Create the configure script from configure.in: autoconf
• I prefer to build in a separate directory: mkdir build;cd build
• Run configure: ../configure
• Build the library: make
• Optionally install it: sudo make install

Cross compiling

Compiling on the Raspberry Pi itself is slow. Since the code of the piio library isn't very big, it's not a big problem. But of course, it's also possible to cross compile the library on a more powerful linux system. To do that, you need a cross compile environment. One way to create that is using the build-cc script. Make sure you have installed all necessary development packages before running the script.

You'll also need a stubs library compiled for a Raspberry Pi. You can generate that by cross compiling Tcl first.

Next, run the following commands:

wget -qO- http://core.tcl.tk/tclconfig/tarball/tclconfig.tar.gz | tar xzv
autoconf
mkdir build
cd build
eval $(~/root/cross-compilers/setup-cc armv6-hardfloat-linux-gnueabi)
../configure -host=armv6-hardfloat-linux-gnueabi --with-tcl=~/rpi/tcl8.5.15/build
make