diff --git a/audio/gvolwheel/gvolwheel.SlackBuild b/audio/gvolwheel/gvolwheel.SlackBuild
index bebb9e08eb..df4e5a9cda 100644
--- a/audio/gvolwheel/gvolwheel.SlackBuild
+++ b/audio/gvolwheel/gvolwheel.SlackBuild
@@ -22,25 +22,26 @@
 # OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 # ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
+# 20220218 bkw: Modified by SlackBuilds.org, BUILD=2:
+# - fix build for Slackware 15.0.
+# - remove useless/redundant files from doc dir.
+
 cd $(dirname $0) ; CWD=$(pwd)
 
 PRGNAM=gvolwheel
 VERSION=${VERSION:-1.0}
-BUILD=${BUILD:-1}
+BUILD=${BUILD:-2}
 TAG=${TAG:-_SBo}
 PKGTYPE=${PKGTYPE:-tgz}
 
 if [ -z "$ARCH" ]; then
   case "$( uname -m )" in
-    i?86) ARCH=i486 ;;
+    i?86) ARCH=i586 ;;
     arm*) ARCH=arm ;;
        *) ARCH=$( uname -m ) ;;
   esac
 fi
 
-# If the variable PRINT_PACKAGE_NAME is set, then this script will report what
-# the name of the created package would be, and then exit. This information
-# could be useful to other scripts.
 if [ ! -z "${PRINT_PACKAGE_NAME}" ]; then
   echo "$PRGNAM-$VERSION-$ARCH-$BUILD$TAG.$PKGTYPE"
   exit 0
@@ -50,8 +51,8 @@ TMP=${TMP:-/tmp/SBo}
 PKG=$TMP/package-$PRGNAM
 OUTPUT=${OUTPUT:-/tmp}
 
-if [ "$ARCH" = "i486" ]; then
-  SLKCFLAGS="-O2 -march=i486 -mtune=i686"
+if [ "$ARCH" = "i586" ]; then
+  SLKCFLAGS="-O2 -march=i586 -mtune=i686"
   LIBDIRSUFFIX=""
 elif [ "$ARCH" = "i686" ]; then
   SLKCFLAGS="-O2 -march=i686 -mtune=i686"
@@ -80,9 +81,11 @@ cd $PRGNAM-$VERSION
 chown -R root:root .
 find -L . \
  \( -perm 777 -o -perm 775 -o -perm 750 -o -perm 711 -o -perm 555 -o -perm 511 \) \
- -exec chmod 755 {} \; -o \
+ -exec chmod 755 {} \+ -o \
  \( -perm 666 -o -perm 664 -o -perm 600 -o -perm 444 -o -perm 440 -o -perm 400 \) \
- -exec chmod 644 {} \;
+ -exec chmod 644 {} \+
+
+SLKCFLAGS+=" -fcommon"
 
 CFLAGS="$SLKCFLAGS" \
 CXXFLAGS="$SLKCFLAGS" \
@@ -96,14 +99,14 @@ CXXFLAGS="$SLKCFLAGS" \
   --build=$ARCH-slackware-linux
 
 make
-make install DESTDIR=$PKG
-
-find $PKG -print0 | xargs -0 file | grep -e "executable" -e "shared object" | grep ELF \
-  | cut -f 1 -d : | xargs strip --strip-unneeded 2> /dev/null || true
+make install-strip DESTDIR=$PKG
 
 # Configure will ignore passed --docdir option, so correct docdir manually.
 mv $PKG/usr/doc/$PRGNAM $PKG/usr/doc/$PRGNAM-$VERSION
 
+# INSTALL is useless, NEWS is 0 bytes.
+rm -f $PKG/usr/doc/$PRGNAM-$VERSION/{INSTALL,NEWS}
+
 cat $CWD/$PRGNAM.SlackBuild > $PKG/usr/doc/$PRGNAM-$VERSION/$PRGNAM.SlackBuild
 
 mkdir -p $PKG/install