A build script that I've found to be useful for building the linux snapshot as well as including with the source snapshots which makes it easy to build with static ffmpeg libs (which it will download, patch, configure, and build for you).

stepmania/Utils/build.sh

@@ -0,0 +1,61 @@
+#!/bin/sh
+
+# Usage: ./build options
+# where options are passed to stepmania's configure script
+
+url=http://stepmania.sf.net
+ffmpeg=ffmpeg-0.4.9-pre1
+patchfile=ffmpeg-0.4.9-pre1-sm.patch
+if test ! -d $ffmpeg; then
+	if test ! -f $ffmpeg.tar.gz; then
+		echo -n 'Downloading ffmpeg...'
+		if which wget &>/dev/null; then
+			dl=wget
+		elif which curl &>/dev/null; then
+			dl="curl -O -O"
+		else
+			echo 'failed.'
+			exit 1
+		fi
+		$dl $url/$ffmpeg.tar.gz $url/$patchfile &>/dev/null  \
+			|| { echo 'failed.'; exit; }
+		echo 'okay.'
+	fi
+	echo -n 'Decompressing ffmpeg...'
+	tar zxf $ffmpeg.tar.gz &>/dev/null || { echo 'failed.'; exit 1; }
+	echo 'okay.'
+	echo -n 'Patching ffmpeg...'
+	patch -p0 < $patchfile &>/dev/null || { echo 'failed.'; exit 1; }
+	echo 'okay.'
+fi
+if test ! -f $ffmpeg/_inst/lib/libavcodec.a; then
+	cd $ffmpeg
+	echo -n 'Configuring ffmpeg...'
+	./configure --prefix="`pwd`/_inst" &>/dev/null \
+		|| { echo 'failed.'; exit 1; }
+	echo 'okay.'
+	echo -n 'Building ffmpeg...'
+	# Hack around broken configure script
+	mkdir -p _inst/lib
+	make installlib &>/dev/null || { echo 'failed.'; exit 1; }
+	echo 'okay.'
+	cd ..
+fi
+if test ! -f _build/src/stepmania; then
+	echo -n 'Configuring StepMania...'
+	mkdir -p _build
+	cd _build
+	../configure --with-static-ffmpeg-prefix=../$ffmpeg/_inst \
+		$@ &>/dev/null || { echo 'failed.'; exit 1; }
+	echo 'okay.'
+	echo -n 'Building StepMania...'
+	make &>/dev/null || { echo 'failed.'; exit 1; }
+	echo 'okay.'
+	cd ..
+fi
+if test ! -f stepmania -o ! -f GtkModule.so; then
+	echo -n 'Copying StepMania binaries...'
+	cp _build/src/stepmania _build/src/GtkModule.so . &>/dev/null \
+		|| { echo 'failed.'; exit 1; }
+	echo 'okay.'
+fi