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GNU Info (gdb.info)Separate ObjdirCompiling GDB in another directory ================================== If you want to run GDB versions for several host or target machines, you need a different `gdb' compiled for each combination of host and target. `configure' is designed to make this easy by allowing you to generate each configuration in a separate subdirectory, rather than in the source directory. If your `make' program handles the `VPATH' feature (GNU `make' does), running `make' in each of these directories builds the `gdb' program specified there. To build `gdb' in a separate directory, run `configure' with the `--srcdir' option to specify where to find the source. (You also need to specify a path to find `configure' itself from your working directory. If the path to `configure' would be the same as the argument to `--srcdir', you can leave out the `--srcdir' option; it is assumed.) For example, with version 2002-04-01-cvs, you can build GDB in a separate directory for a Sun 4 like this: cd gdb-2002-04-01-cvs mkdir ../gdb-sun4 cd ../gdb-sun4 ../gdb-2002-04-01-cvs/configure sun4 make When `configure' builds a configuration using a remote source directory, it creates a tree for the binaries with the same structure (and using the same names) as the tree under the source directory. In the example, you'd find the Sun 4 library `libiberty.a' in the directory `gdb-sun4/libiberty', and GDB itself in `gdb-sun4/gdb'. One popular reason to build several GDB configurations in separate directories is to configure GDB for cross-compiling (where GDB runs on one machine--the "host"--while debugging programs that run on another machine--the "target"). You specify a cross-debugging target by giving the `--target=TARGET' option to `configure'. When you run `make' to build a program or library, you must run it in a configured directory--whatever directory you were in when you called `configure' (or one of its subdirectories). The `Makefile' that `configure' generates in each source directory also runs recursively. If you type `make' in a source directory such as `gdb-2002-04-01-cvs' (or in a separate configured directory configured with `--srcdir=DIRNAME/gdb-2002-04-01-cvs'), you will build all the required libraries, and then build GDB. When you have multiple hosts or targets configured in separate directories, you can run `make' on them in parallel (for example, if they are NFS-mounted on each of the hosts); they will not interfere with each other. automatically generated by info2www version 1.2.2.9 |