an issue with parsing $$

Kati does not seem to handle below case.

func = lib$(1)$(2)
bar := -lc -lm
$(eval foo := $(bar:-l%=$$(call func,%,.so)))
mylib:
@echo $(foo)

Expected output is
libc.so libm.so

Kati fails with following error.
makefile:3: *** unterminated call to function 'call': missing ')'.