Default Prefix ============== 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. - Macro: AC_PREFIX_DEFAULT (PREFIX) Set the default installation prefix to PREFIX instead of `/usr/local'. 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'. - Macro: AC_PREFIX_PROGRAM (PROGRAM) 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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