RTEMS GNU Tools On-Line Library

Porting GDB

GDB Internals

Chapter 13: Porting GDB

Most of the work in making GDB compile on a new machine is in specifying the configuration of the machine. This is done in a dizzying variety of header files and configuration scripts, which we hope to make more sensible soon. Let's say your new host is called an xyz (e.g. `sun4'), and its full three-part configuration name is arch-xvend-xos (e.g. `sparc-sun-sunos4'). In particular:

In the top level directory, edit `config.sub' and add arch, xvend, and xos to the lists of supported architectures, vendors, and operating systems near the bottom of the file. Also, add xyz as an alias that maps to arch-xvend-xos. You can test your changes by running

./config.sub xyz

and

./config.sub arch-xvend-xos

which should both respond with arch-xvend-xos and no error messages.

You need to port BFD, if that hasn't been done already. Porting BFD is beyond the scope of this manual.

To configure GDB itself, edit `gdb/configure.host' to recognize your system and set gdb_host to xyz, and (unless your desired target is already available) also edit `gdb/configure.tgt', setting gdb_target to something appropriate (for instance, xyz).

Finally, you'll need to specify and define GDB's host-, native-, and target-dependent `.h' and `.c' files used for your configuration.

13.1: Configuring GDB for Release

From the top level directory (containing `gdb', `bfd', `libiberty', and so on):

make -f Makefile.in gdb.tar.gz

This will properly configure, clean, rebuild any files that are distributed pre-built (e.g. `c-exp.tab.c' or `refcard.ps'), and will then make a tarfile. (If the top level directory has already been configured, you can just do make gdb.tar.gz instead.)

This procedure requires:

symbolic links
makeinfo (texinfo2 level)
TeX
dvips
yacc or bison

... and the usual slew of utilities (sed, tar, etc.).

TEMPORARY RELEASE PROCEDURE FOR DOCUMENTATION

`gdb.texinfo' is currently marked up using the texinfo-2 macros, which are not yet a default for anything (but we have to start using them sometime).

For making paper, the only thing this implies is the right generation of `texinfo.tex' needs to be included in the distribution.

For making info files, however, rather than duplicating the texinfo2 distribution, generate `gdb-all.texinfo' locally, and include the files `gdb.info*' in the distribution. Note the plural; makeinfo will split the document into one overall file and five or so included files.

GDB Internals