Node:Default Prefix, Previous:Subdirectories, Up:Setup
By default, configure sets the prefix for files it installs to
/usr/local. The user of configure can select a different
prefix using the --prefix and --exec-prefix options.
There are two ways to change the default: when creating
configure, and when running it.
Some software packages might want to install in a directory besides
/usr/local by default. To accomplish that, use the
AC_PREFIX_DEFAULT macro.
| AC_PREFIX_DEFAULT (prefix) | Macro |
Set the default installation prefix to prefix instead of
/usr/local.
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It may be convenient for users to have configure guess the
installation prefix from the location of a related program that they
have already installed. If you wish to do that, you can call
AC_PREFIX_PROGRAM.
| AC_PREFIX_PROGRAM (program) | Macro |
If the user did not specify an installation prefix (using the
--prefix option), guess a value for it by looking for
program in PATH, the way the shell does. If program
is found, set the prefix to the parent of the directory containing
program; otherwise leave the prefix specified in
Makefile.in unchanged. For example, if program is
gcc and the PATH contains /usr/local/gnu/bin/gcc,
set the prefix to /usr/local/gnu.
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