How to Compile MP3Gain on DD-WRT or other UNSLUG devices

It is a simple procedure, with one caveat. It requires you to have Optware, and because of space requirements it is HIGHLY recommended to have optware on a seperate disk, NOT JFFS.

1. Install the build toolchain:

   ipkg install buildroot
   

   or

   ipkg install optware-devel
   

   and

   ipkg install unzip
   

2. Download the MP3 Gain sources, pick the latest from http://sourceforge.net/projects/mp3gain/files/mp3gain/.

   wget http://sourceforge.com/...
   

3. CD to the directory and unzip the source code

4. Make the program

   make
   

   if you run into the error:

   cc -Wall -DHAVE_MEMCPY   -c -o mp3gain.o mp3gain.c
   cc: can't resolve symbol '__fsetlocking'
   make: *** [mp3gain.o] Error 1
   

   you need to point the LD_LIBRARY_PATH to your optware lib:

   export LD_LIBRARY_PATH=/opt/lib:$LD_LIBRARY_PATH
   

5. I have not gotten make install working, but it should be enough to copy mp3gain into /opt/bin