Added --with-configdir and --with-plugindir options to configure which specify the directories for config files and plugin objects respectively. The default paths when these options are not specified are unchanged.
From: Bernard Leak <bernard@brenda-arkle.demon.co.uk> Allow separate build and source trees. Modified for the latest CVS tree by tiwai.
Compile dynamic modules outside the alsa-lib tree to allow linking them against libasound.so - proper versions of dynamic symbols.
