Mates, I am having a issue when trying to compile a simple code that should work without problems. I have it running in other machines, but I can't figure out what it might be. This is the output: bash-3.1# gcc -Wall $(pkg-config --cflags --libs gstreamer-0.10) spectrum.c /tmp/cccrQH9p.o: In function `bus_call': spectrum.c:(.text+0xd): undefined reference to `gst_message_get_type' spectrum.c:(.text+0x64): undefined reference to `gst_message_parse_error' /tmp/cccrQH9p.o: In function `on_pad_added': spectrum.c:(.text+0xdd): undefined reference to `gst_element_get_static_pad' spectrum.c:(.text+0xf1): undefined reference to `gst_pad_link' spectrum.c:(.text+0xff): undefined reference to `gst_object_unref' /tmp/cccrQH9p.o: In function `main': spectrum.c:(.text+0x12b): undefined reference to `gst_init' spectrum.c:(.text+0x17c): undefined reference to `gst_pipeline_new' spectrum.c:(.text+0x194): undefined reference to `gst_element_factory_make' spectrum.c:(.text+0x1ac): undefined reference to `gst_element_factory_make' spectrum.c:(.text+0x1c4): undefined reference to `gst_element_factory_make' spectrum.c:(.text+0x1dc): undefined reference to `gst_element_factory_make' spectrum.c:(.text+0x1f4): undefined reference to `gst_element_factory_make' spectrum.c:(.text+0x26c): undefined reference to `gst_pipeline_get_type' spectrum.c:(.text+0x285): undefined reference to `gst_pipeline_get_bus' spectrum.c:(.text+0x29e): undefined reference to `gst_bus_add_watch' spectrum.c:(.text+0x2ac): undefined reference to `gst_object_unref' spectrum.c:(.text+0x2b4): undefined reference to `gst_bin_get_type' spectrum.c:(.text+0x2de): undefined reference to `gst_bin_add_many' spectrum.c:(.text+0x2ef): undefined reference to `gst_element_link' spectrum.c:(.text+0x302): undefined reference to `gst_element_link_many' spectrum.c:(.text+0x34e): undefined reference to `gst_element_set_state' spectrum.c:(.text+0x38c): undefined reference to `gst_element_set_state' spectrum.c:(.text+0x3a4): undefined reference to `gst_object_get_type' spectrum.c:(.text+0x3bd): undefined reference to `gst_object_unref' collect2: ld returned 1 exit status I have the PKG_CONFIG_PATH duly configured and gstreamer-0.10 libraries are installed. What am I missing here?????? This is the code: #include <gst/gst.h> #include <glib.h> static gboolean bus_call (GstBus *bus, GstMessage *msg, gpointer data) { GMainLoop *loop = (GMainLoop *) data; switch (GST_MESSAGE_TYPE (msg)) { case GST_MESSAGE_EOS: g_print ("End of stream\n"); g_main_loop_quit (loop); break; case GST_MESSAGE_ERROR: { gchar *debug; GError *error; gst_message_parse_error (msg, &error, &debug); g_free (debug); g_printerr ("Error: %s\n", error->message); g_error_free (error); g_main_loop_quit (loop); break; } default: break; } return TRUE; } static void on_pad_added (GstElement *element, GstPad *pad, gpointer data) { GstPad *sinkpad; GstElement *decoder = (GstElement *) data; /* We can now link this pad with the vorbis-decoder sink pad */ g_print ("Dynamic pad created, linking demuxer/decoder\n"); sinkpad = gst_element_get_static_pad (decoder, "sink"); gst_pad_link (pad, sinkpad); gst_object_unref (sinkpad); } int main (int argc, char *argv[]) { GMainLoop *loop; GstElement *pipeline, *source, *demuxer, *decoder, *conv, *sink; GstBus *bus; /* Initialisation */ gst_init (&argc, &argv); loop = g_main_loop_new (NULL, FALSE); /* Check input arguments */ if (argc != 2) { g_printerr ("Usage: %s <Ogg/Vorbis filename>\n", argv[0]); return -1; } /* Create gstreamer elements */ pipeline = gst_pipeline_new ("audio-player"); source = gst_element_factory_make ("filesrc", "file-source"); demuxer = gst_element_factory_make ("oggdemux", "ogg-demuxer"); decoder = gst_element_factory_make ("vorbisdec", "vorbis-decoder"); conv = gst_element_factory_make ("audioconvert", "converter"); sink = gst_element_factory_make ("autoaudiosink", "audio-output"); if (!pipeline || !source || !demuxer || !decoder || !conv || !sink) { g_printerr ("One element could not be created. Exiting.\n"); return -1; } /* Set up the pipeline */ /* we set the input filename to the source element */ g_object_set (G_OBJECT (source), "location", argv[1], NULL); /* we add a message handler */ bus = gst_pipeline_get_bus (GST_PIPELINE (pipeline)); gst_bus_add_watch (bus, bus_call, loop); gst_object_unref (bus); /* we add all elements into the pipeline */ /* file-source | ogg-demuxer | vorbis-decoder | converter | alsa-output */ gst_bin_add_many (GST_BIN (pipeline), source, demuxer, decoder, conv, sink, NULL); /* we link the elements together */ /* file-source -> ogg-demuxer ~> vorbis-decoder -> converter -> alsa-output */ gst_element_link (source, demuxer); gst_element_link_many (decoder, conv, sink, NULL); g_signal_connect (demuxer, "pad-added", G_CALLBACK (on_pad_added), decoder); /* note that the demuxer will be linked to the decoder dynamically. The reason is that Ogg may contain various streams (for example audio and video). The source pad(s) will be created at run time, by the demuxer when it detects the amount and nature of streams. Therefore we connect a callback function which will be executed when the "pad-added" is emitted.*/ /* Set the pipeline to "playing" state*/ g_print ("Now playing: %s\n", argv[1]); gst_element_set_state (pipeline, GST_STATE_PLAYING); /* Iterate */ g_print ("Running...\n"); g_main_loop_run (loop); /* Out of the main loop, clean up nicely */ g_print ("Returned, stopping playback\n"); gst_element_set_state (pipeline, GST_STATE_NULL); g_print ("Deleting pipeline\n"); gst_object_unref (GST_OBJECT (pipeline)); return 0; } Tks so much!