I try to migrate an application from VMS to Red Hat Linux

When I try to recompile my pro*c files, I get the following errors :
"undefined reference to `sqlcx2t'",

although, sqlcx2t is not present in the file. i have checked.
I have checked the includes of sqlca.h in my files, it seems OK.

I use the makefile makefile.mk like that :
make -f makefile.mk my_file

please provide a little insight on sqlcx2t..

Thanks a lot...