Configuring Other Packages in Subdirectories ============================================ In most situations, calling `AC_OUTPUT' is sufficient to produce `Makefile's in subdirectories. However, `configure' scripts that control more than one independent package can use `AC_CONFIG_SUBDIRS' to run `configure' scripts for other packages in subdirectories. - Macro: AC_CONFIG_SUBDIRS (DIR ...) Make `AC_OUTPUT' run `configure' in each subdirectory DIR in the given whitespace-separated list. If a given DIR is not found, no error is reported, so a `configure' script can configure whichever parts of a large source tree are present. If a given DIR contains `configure.in' but no `configure', the Cygnus `configure' script found by `AC_CONFIG_AUXDIR' is used. The subdirectory `configure' scripts are given the same command line options that were given to this `configure' script, with minor changes if needed (e.g., to adjust a relative path for the cache file or source directory). This macro also sets the output variable `subdirs' to the list of directories `DIR ...'. `Makefile' rules can use this variable to determine which subdirectories to recurse into. This macro may be called multiple times.
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