Hi, >I have downloaded libmad-0.15.1b.tar.gz from ftp://ftp.mars.org/pub/mpeg/ >then I execute ./configure --prefix=/usr >It says>>>>> configure: error: C++ preprocessor "/lib/cpp" fails sanity check > >then i downloaded libmad-0.15.0b.tar.gz In this configure step >was fine but after that when i did make it gives following error: >cc1: error: unrecognized command line option "-fforce-mem" > >how can i get rid of this and install libmad on my ubuntu pc. But where is the "Memory leak on filesrc" mentioned in the Subject? Please do not hijack the thread in the future. It is misleading for the reader and reduce your chances to get the answer to your question. Thanks, Andrey.