4.12 Examples of gnatbind Usage

This section contains a number of examples of using the GNAT binding utility gnatbind.

gnatbind hello

The main program Hello (source program in hello.adb) is bound using the standard switch settings. The generated main program is b~hello.adb. This is the normal, default use of the binder.

gnatbind hello -o mainprog.adb

The main program Hello (source program in hello.adb) is bound using the standard switch settings. The generated main program is mainprog.adb with the associated spec in mainprog.ads. Note that you must specify the body here not the spec, in the case where the output is in Ada. Note that if this option is used, then linking must be done manually, since gnatlink will not be able to find the generated file.

gnatbind main -C -o mainprog.c -x

The main program Main (source program in main.adb) is bound, excluding source files from the consistency checking, generating the file mainprog.c.

gnatbind -x main_program -C -o mainprog.c

This command is exactly the same as the previous example. Switches may appear anywhere in the command line, and single letter switches may be combined into a single switch.

gnatbind -n math dbase -C -o ada-control.c

The main program is in a language other than Ada, but calls to subprograms in packages Math and Dbase appear. This call to gnatbind generates the file ada-control.c containing the adainit and adafinal routines to be called before and after accessing the Ada units.