The libme (libm for enhanced core pic14 devices) is built for non-enhanced devices, which causes a processor mismatch linker error.
see original report by Daniel Michalik on 2013-02-25 as "[Sdcc-user] linking library for cosf/math - processor mismatch"
Fixed in r8443. A typo in the build system (Makefile.am) made Automake use the wrong compilation flags for the enhanced cores (well, it reused the flags from the non-enhanced devices, including the device family ...).
Thanks for reporting it.