B.2 Invoking the gdb configure Script
The gdb distribution includes all the source code you need for gdb in a single directory, whose name is usually composed by appending the version number to gdb.
For example, the gdb version 7.2 distribution is in the gdb-7.2 directory. That directory contains:
gdb-7.2/configure(and supporting files)
- script for configuring gdb and all its supporting libraries
- the source specific to gdb itself
- source for the Binary File Descriptor library
- gnu include files
- source for the -liberty free software library
- source for the library of opcode tables and disassemblers
- source for the gnu command-line interface
- source for the gnu filename pattern-matching subroutine
- source for the gnu memory-mapped malloc package
The simplest way to configure and build gdb is to run configure from the gdb-version-number source directory, which in this example is the gdb-7.2 directory.
First switch to the gdb-version-number source directory if you are not already in it; then run configure. Pass the identifier for the platform on which gdb will run as an argument.
cd gdb-7.2 ./configure host make
where host is an identifier such as sun4 or decstation, that identifies the platform where gdb will run. (You can often leave off host; configure tries to guess the correct value by examining your system.)
Running configure host and then running
make builds the
bfd, readline, mmalloc, and libiberty
gdb itself. The configured source files, and the
binaries, are left in the corresponding source directories.
configure is a Bourne-shell (
/bin/sh) script; if your
system does not recognize this automatically when you run a different
shell, you may need to run
sh on it explicitly:
sh configure host
If you run configure from a directory that contains source directories for multiple libraries or programs, such as the gdb-7.2 source directory for version 7.2, configure creates configuration files for every directory level underneath (unless you tell it not to, with the --norecursion option).
You should run the configure script from the top directory in the source tree, the gdb-version-number directory. If you run configure from one of the subdirectories, you will configure only that subdirectory. That is usually not what you want. In particular, if you run the first configure from the gdb subdirectory of the gdb-version-number directory, you will omit the configuration of bfd, readline, and other sibling directories of the gdb subdirectory. This leads to build errors about missing include files such as bfd/bfd.h.
You can install
gdb anywhere; it has no hardwired paths.
However, you should make sure that the shell on your path (named by
the SHELL environment variable) is publicly readable. Remember
that gdb uses the shell to start your program—some systems refuse to
let gdb debug child processes whose programs are not readable.