By default, all file access is handled by the ACUCOBOL-GT native file handler. For those file types you want to access using an EXTFH library, you need to set one (or more) of the following configuration variables to "EXTFH":
DEFAULT_FILESYSTEM
DEFAULT_IDX_FILESYSTEM
DEFAULT_REL_FILESYSTEM
DEFAULT_SEQ_FILESYSTEM
filename_FILESYSTEM
Note that when you use filename_FILESYSTEM, the file suffix is not included in the configuration variable definition. If the filename is "outputfile.tmp", for example, set this variable as:
outputfile_FILESYSTEM
To use the DB2 library to access indexed files and the ACUCOBOL-GT native file handler for sequential and relative files, set the following two configuration variables:
A_EXTFH_LIB=/pathname/libraryname.o DEFAULT_IDX_FILESYSTEM=EXTFH
For more information on these configuration variables, see Configuration Variables.