diff src/vamp-plugin-sdk-2.4/build/README.linux @ 12:b7bda433d832

Add Vamp SDK source

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/vamp-plugin-sdk-2.4/build/README.linux	Wed Mar 20 15:58:35 2013 +0000
@@ -0,0 +1,74 @@
+
+The Vamp Plugin SDK -- Platform Notes for Linux and other GNU platforms
+=======================================================================
+
+Building at the command line
+----------------------------
+
+To build the SDK, example plugins, and command-line host:
+
+$ ./configure
+$ make
+
+To install after a successful make, run "make install" as root (or via
+sudo).
+
+
+Installing the Example Plugins
+------------------------------
+
+To install the example plugins so you can load them in Vamp hosts,
+copy the files
+
+   examples/vamp-example-plugins.so
+and
+   examples/vamp-example-plugins.cat
+
+to
+   /usr/local/lib/vamp/
+or 
+   $HOME/vamp/
+
+
+Plugin Linkage
+--------------
+
+Vamp plugins are distributed as dynamic libraries (.so files).  A
+properly packaged Vamp plugin library should export exactly one public
+symbol, namely the Vamp API entry point vampGetPluginDescriptor.
+
+The default for the GNU linker is to export all of the symbols in the
+library.  This will work (the host will be able to load the plugin),
+but it unnecessarily pollutes the host's symbol namespace, it may
+cause symbol collisions in some esoteric circumstances, and it
+increases the amount of time the plugin takes to load.
+
+To improve this behaviour, you can instruct the linker to export only
+the one required symbol using a linker script.  To do this, place the
+text
+
+{
+	global: vampGetPluginDescriptor;
+	local: *;
+};
+
+into a text file, and then use the --version-script option to the
+linker to tell it to refer to this file.  All other symbols will then
+be properly hidden.
+
+The Makefile included in this SDK uses this method to manage symbol
+visibility for the included example plugins, using the file
+build/vamp-plugin.map.  There are other methods that will work too,
+but this one is simple and has the advantage of requiring no changes
+to the code.
+
+
+Test Your Plugins
+-----------------
+
+The Vamp Plugin Tester is a vital utility which you can use to test
+your plugins for common problems.  It can help you if you're having
+problems getting your plugin to work at all, and you're strongly
+advised to use it before you release anything.  Download it from the
+Vamp plugins site now!
+