audio/jamin: Miscellaneous cleanups.

audio/jamin/README

@@ -3,5 +3,4 @@ interface. JAMin is an open source application designed to perform
 professional audio mastering of stereo input streams. It uses ladspa
 for digital signal processing (DSP).
 
-This requires jack-audio-connection-kit, fftw, liblo, 
-and libsndfile from SlackBuilds.org.
+This requires jack-audio-connection-kit, liblo, and libsndfile.

audio/jamin/jamin.SlackBuild

@@ -24,10 +24,19 @@
 
 PRGNAM=jamin
 VERSION=0.95.0
-ARCH=${ARCH:-i486}
 BUILD=${BUILD:-1}
 TAG=${TAG:-_SBo}
 
+# Automatically determine the architecture we're building on:
+if [ -z "$ARCH" ]; then
+  case "$( uname -m )" in
+    i?86) export ARCH=i486 ;;
+    arm*) export ARCH=arm ;;
+    # Unless $ARCH is already set, use uname -m for all other archs:
+       *) export ARCH=$( uname -m ) ;;
+  esac
+fi
+
 CWD=$(pwd)
 TMP=${TMP:-/tmp/SBo}
 PKG=$TMP/package-$PRGNAM
@@ -42,6 +51,9 @@ elif [ "$ARCH" = "i686" ]; then
 elif [ "$ARCH" = "x86_64" ]; then
   SLKCFLAGS="-O2 -fPIC"
   LIBDIRSUFFIX="64"
+else
+  SLKCFLAGS="-O2"
+  LIBDIRSUFFIX=""
 fi
 
 set -eu