LV2 discovery by plugin class

lv2_class.c

#include <stdio.h>
#include <lilv/lilv.h>

int
main(int argc, char **argv)
{
	LilvWorld *world = lilv_world_new();
	if(world)
	{
		lilv_world_load_all(world);

		const LilvPlugins *plugins = lilv_world_get_all_plugins(world);
		if(plugins)
		{
			LILV_FOREACH(plugins, itr, plugins)
			{
				const LilvPlugin *plugin = lilv_plugins_get(plugins, itr);
				if(plugin)
				{
					const LilvPluginClass *class = lilv_plugin_get_class(plugin);
					const LilvNode *uri = lilv_plugin_get_uri(plugin);
					LilvNode *name = lilv_plugin_get_name(plugin);

					if(class && uri && name)
					{
						const LilvNode *label = lilv_plugin_class_get_label(class);
						printf("%s,%s,%s\n",
							lilv_node_as_string(label),
							lilv_node_as_string(name),
							lilv_node_as_uri(uri));
						lilv_node_free(name);
					}
				}
			}
		}

		lilv_world_free(world);
	}

	return 0;
}

Makefile

all: list

lv2_class: lv2_class.c
	gcc -std=gnu99 -O3 -o $@ $< $(shell pkg-config --cflags --libs lilv-0)

list: lv2_class
	./$< \
	| sort \
	| sed 's/,/\n/g' \
	| zenity \
			--list --hide-column=3 --print-column=ALL \
			--title='LV2 Plugins' \
			--column=Type --column=Name --column=URI

Hi, thanks a lot!

I must be missing some libraries, I get this error but I installed everything lilv-related..?

⚡ make                       
gcc -O3 -o lv2_class lv2_class.c -I/usr/include/serd-0 -I/usr/include/sord-0 -I/usr/include/sratom-0 -I/usr/include/lilv-0  -llilv-0 -ldl -lsratom-0 -lsord-0 -lserd-0  
In file included from lv2_class.c:2:0:
lv2_class.c: In function ‘main’:
/usr/include/lilv-0/lilv/lilv.h:327:2: error: ‘for’ loop initial declarations are only allowed in C99 mode
  for (LilvIter* (iter) = lilv_ ## colltype ## _begin(collection); \
  ^
lv2_class.c:15:4: note: in expansion of macro ‘LILV_FOREACH’
    LILV_FOREACH(plugins, itr, plugins)
    ^
/usr/include/lilv-0/lilv/lilv.h:327:2: note: use option -std=c99 or -std=gnu99 to compile your code
  for (LilvIter* (iter) = lilv_ ## colltype ## _begin(collection); \
  ^
lv2_class.c:15:4: note: in expansion of macro ‘LILV_FOREACH’
    LILV_FOREACH(plugins, itr, plugins)
    ^
make: *** [lv2_class] Error 1

Your compiler defaults to C90 mode, lilv needs at least C99.

use
gcc -std=gnu99 -O3...
or
gcc -std=gnu11 -O3 ...

That did it :)

naming a variable class ? doesn't compile for me with clang because of that,