You need to convert the .spec file from dos (CRLF) to unix (LF). The 'command not found' above is the CR (listed as "$'\r'").
I also had to change the 'make' lines to 'make -f LINUX/Makefile', add a 'UDEV_RULES=$RPM_BUILD_ROOT%{_sysconfdir}/udev/rules.d \' line after the 'INCDIR=' line (under %install), and delete 'CABLE' from the '%doc' line (in addition to changing 'Copyright' to 'License.
2009-01-30 03:54:12 UTC in OpenCBM