libraries/exiftool: Miscellaneous cleanups

libraries/exiftool/exiftool.SlackBuild

@@ -6,10 +6,19 @@
 
 PRGNAM=exiftool
 VERSION=8.00
-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
@@ -33,14 +42,12 @@ make install DESTDIR=$PKG
 mv $PKG/usr/share/man $PKG/usr/man
 rmdir $PKG/usr/share
 
-( cd $PKG/usr/man ; find . -type f -exec gzip -9 {} \; )
+find $PKG/usr/man -type f -exec gzip -9 {} \; )
 
-( cd $PKG
-  find . -name perllocal.pod \
-    -o -name ".packlist" \
-    -o -name "*.bs" \
-    | xargs rm -f
-)
+find $PKG -name perllocal.pod \
+  -o -name ".packlist" \
+  -o -name "*.bs" \
+  | xargs rm -f
 
 # Kill some empty directories
 eval $(perl '-V:archlib')