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- This directory contains drivers for the DBMI library.
- The driver functions are for internal usage.
- The DBMI API to be used for module programming is available in:
- lib/db/
- NOTE:
- db__driver_* functions are implemented in a driver. If some of them
- are not used or defined, the driver will use stub functions in
- lib/db/stubs/
- For some platforms like Cygwin, multiply defined symbols are not
- resolved in a way that UNIX does. Even worse is that it is impossible
- to build shared libraries with undefined symbols. For example,
- libgrass_dbmidriver.so cannot be built without any implementations
- of db__driver_* functions which should be specific to a db driver.
- To work around this problem, function pointers are defined to use
- driver's implementations instead of those of the db stubs library.
- To do this automatically, run '../mk_dbdriver_h.sh' in driver's
- directory, #include "dbdriver.h" from main.c, and execute init_dbdriver().
- Function pointers are defined in grass6/lib/db/dbmi_driver/dbstubs.h
- This header file can be generated with
- lib/db/dbmi_driver/mk_dbstubs_h.sh
- Please read lib/db/README
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