diff --git a/d/libgccjit/SlackBuild b/d/libgccjit/SlackBuild
new file mode 100755
index 00000000..3fbb27b0
--- /dev/null
+++ b/d/libgccjit/SlackBuild
@@ -0,0 +1,187 @@
+#!/bin/bash
+# "gwh-ified" based on http://slackware.uk/slint/x86_64/slint-15.0/source/libgccjit/
+
+cd $(dirname $0) ; CWD=$(pwd)
+
+PKGNAM=$(basename "$CWD")
+BUILD=${BUILD:-2}
+TAG=${TAG:-gwh}
+
+OFFICIAL_GCC_SRC_PATH=${OFFICIAL_GCC_SRC_PATH:-/home/installs/mirrors/slackware64-current/source/d/gcc/}
+SRCNAM=gcc
+SRCVER=${VERSION:-$(echo $OFFICIAL_GCC_SRC_PATH/$SRCNAM-*.tar.?z | rev | cut -f 3- -d . | cut -f 1 -d - | rev)}
+VERSION=$(echo $SRCVER | cut -f 1 -d _)
+
+TMP=${TMP:-/tmp/$TAG}
+OUTPUT=${OUTPUT:-/tmp}
+
+# This is the main DESTDIR target:
+PKG=$TMP/pkg-$PKGNAM
+
+# How many jobs to run in parallel:
+NUMJOBS=${NUMJOBS:-" -j$(expr $(nproc) + 1) "}
+
+# Automatically determine the architecture we're building on:
+if [ -z "$ARCH" ]; then
+  case "$(uname -m)" in
+    i?86) ARCH=i586 ;;
+    arm*) readelf /usr/bin/file -A | egrep -q "Tag_CPU.*[4,5]" && ARCH=arm || ARCH=armv7hl ;;
+    # Unless $ARCH is already set, use uname -m for all other archs:
+    *) ARCH=$(uname -m) ;;
+  esac
+  export ARCH
+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 "${PRINT_PACKAGE_NAME}" ]; then
+  echo "$PKGNAM-$VERSION-$ARCH-$BUILD.txz"
+  exit 0
+fi
+
+if [ "$ARCH" = "i386" ]; then
+  SLKCFLAGS="-O2 -march=i386 -mcpu=i686"
+  LIBDIRSUFFIX=""
+  LIB_ARCH=i386
+elif [ "$ARCH" = "i486" ]; then
+  SLKCFLAGS="-O2 -march=i486 -mtune=i686"
+  LIBDIRSUFFIX=""
+  LIB_ARCH=i386
+elif [ "$ARCH" = "i586" ]; then
+  SLKCFLAGS="-O2 -march=i586 -mtune=i686"
+  LIBDIRSUFFIX=""
+  LIB_ARCH=i386
+elif [ "$ARCH" = "i686" ]; then
+  SLKCFLAGS="-O2 -march=i686"
+  LIBDIRSUFFIX=""
+  LIB_ARCH=i386
+elif [ "$ARCH" = "s390" ]; then
+  SLKCFLAGS="-O2"
+  LIBDIRSUFFIX=""
+  LIB_ARCH=s390
+elif [ "$ARCH" = "x86_64" ]; then
+  SLKCFLAGS="-O2 -fPIC"
+  LIBDIRSUFFIX="64"
+  LIB_ARCH=amd64
+elif [ "$ARCH" = "armv7hl" ]; then
+  SLKCFLAGS="-O3 -march=armv7-a -mfpu=vfpv3-d16"
+  LIBDIRSUFFIX=""
+  LIB_ARCH=armv7hl
+else
+  SLKCFLAGS="-O2"
+  LIBDIRSUFFIX=""
+  LIB_ARCH=$ARCH
+fi
+
+case "$ARCH" in
+    arm*) TARGET=$ARCH-slackware-linux-gnueabi ;;
+    *)    TARGET=$ARCH-slackware-linux ;;
+esac
+
+# Extract the source code:
+mkdir -p $TMP
+cd $TMP || exit 1
+rm -rf gcc-$SRCVER
+tar xf $OFFICIAL_GCC_SRC_PATH/gcc-$SRCVER.tar.?z || exit 1
+
+# Clear the build locations:
+rm -rf $PKG
+mkdir $PKG
+
+cd gcc-$SRCVER || exit 1
+
+# Fix perms/owners:
+chown -R root:root .
+find . \
+  \( -perm 777 -o -perm 775 -o -perm 754 \) \
+  -exec chmod 755 {} \+ -o \
+  \( -perm 664 \) \
+  -exec chmod 644 {} \+
+
+mkdir -p $PKG/usr/doc/$PKGNAM
+cp -a \
+   COPYING* gcc/ONEWS README INSTALL LAST_UPDATED \
+   $PKG/usr/doc/$PKGNAM
+
+mkdir gcc.build.lnx
+cd gcc.build.lnx
+
+if [ "$ARCH" != "x86_64" ]; then
+  GCC_ARCHOPTS="--with-arch=$ARCH"
+else
+  GCC_ARCHOPTS="--disable-multilib"
+fi
+
+CFLAGS="$SLKCFLAGS" \
+      CXXFLAGS="$SLKCFLAGS" \
+      ../configure --prefix=/usr \
+      --libdir=/usr/lib$LIBDIRSUFFIX \
+      --mandir=/usr/man \
+      --infodir=/usr/info \
+      --enable-shared \
+      --enable-host-shared \
+      --enable-bootstrap \
+      --enable-languages=jit \
+      --enable-threads=posix \
+      --enable-checking=release \
+      --enable-objc-gc \
+      --with-system-zlib \
+      --enable-libstdcxx-dual-abi \
+      --with-default-libstdcxx-abi=new \
+      --disable-libstdcxx-pch \
+      --disable-libunwind-exceptions \
+      --enable-__cxa_atexit \
+      --disable-libssp \
+      --enable-gnu-unique-object \
+      --enable-plugin \
+      --enable-lto \
+      --disable-install-libiberty \
+      --disable-werror \
+      --with-gnu-ld \
+      --with-isl \
+      --verbose \
+      --with-arch-directory=$LIB_ARCH \
+      --disable-gtktest \
+      --enable-clocale=gnu \
+      $GCC_ARCHOPTS \
+      --target=${TARGET} \
+      --build=${TARGET} \
+      --host=${TARGET} || exit 1
+
+make $NUMJOBS bootstrap || exit 1
+make -C gcc DESTDIR="$PKG" jit.install-common jit.install-info
+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
+
+cd $PKG || exit 1
+rm -rf usr/bin usrlib64/gcc usr/libexec usr/man usr/info/dir
+cd usr/info
+gzip -9 *
+
+cd $PKG || exit 1
+mkdir -p install/
+cat <<EOF > install/slack-desc
+# HOW TO EDIT THIS FILE:
+# The "handy ruler" below makes it easier to edit a package description. Line
+# up the first '|' above the ':' following the base package name, and the '|' on
+# the right side marks the last column you can put a character in. You must make
+# exactly 11 lines for the formatting to be correct. It's also customary to
+# leave one space after the ':'.
+
+         |-----handy-ruler------------------------------------------------------|
+libgccjit: libgccit (Just In Time Compilation: shared library and header files.)
+libgccjit:
+libgccjit: GCC can be built as a shared library "libgccjit.so", for generating
+libgccjit: machine code from API calls, using GCC as the backend.
+libgccjit: This shared library can then be dynamically-linked into bytecode
+libgccjit: interpreters and other such programs that want to generate machine
+libgccjit: code "on the fly" at run-time. It can also be used for ahead-of-time
+libgccjit: code generation, for building standalone compilers (so the "jit"
+libgccjit: part of the name is now something of a misnomer).
+libgccjit: The library provides a C API, along with a C++ wrapper API, with
+libgccjit: bindings for languages available from 3rd parties
+libgccjit:
+EOF
+
+makepkg -l y -c n $OUTPUT/$PKGNAM-$VERSION-$ARCH-$BUILD$TAG.txz