I used the info from here. But instead doing
svn co http://svn.berlios.de/svnroot/repos/wsjt/branches/wspr
you have to do
svn co http://svn.berlios.de/svnroot/repos/wsjt/branches/wspr -r2840
The latest version of WSPR creates a bug and you cannot build it on RPi. Thank you to Jean-michel of WSPRnet forum.
My setup is:
- RPi in 900MHz mode.
- Inexpensive USB soundcard stick
- WSPR_r2840
- USB hub with four ports
- WiFi stick
- Yaesu FRG-100