Using and Porting GNU CC
If you wish to build the object files and executables in a directory other than the one containing the source files, here is what you must do differently:
VPATHfeature. (GNU Make supports it, as do Make versions on most BSD systems.)
configure' in the source directory, you must undo the configuration. Do this by running:
mkdir gcc-sun3 cd gcc-sun3
On systems that do not support symbolic links, this directory must be on the same file system as the source code directory.
configure' when you run it:
This also tells
configure where to find the compiler sources;
configure takes the directory from the file name that was used to
invoke it. But if you want to be sure, you can specify the source
directory with the `
--srcdir' option, like this:
../gcc/configure --srcdir=../gcc sun3
The directory you specify with `
--srcdir' need not be the same
as the one that
configure is found in.
Now, you can run
make in that directory. You need not repeat the
configuration steps shown above, when ordinary source files change. You
must, however, run
configure again when the configuration files
change, if your system does not support symbolic links.