diff --git a/libraries/gnatcoll-core/README b/libraries/gnatcoll-core/README
new file mode 100644
index 00000000000..0e7982f81e8
--- /dev/null
+++ b/libraries/gnatcoll-core/README
@@ -0,0 +1,3 @@
+GNAT Components Collection - Core packages
+
+This is the core module of the GNAT Components Collection.
diff --git a/libraries/gnatcoll-core/compiler-error.patch b/libraries/gnatcoll-core/compiler-error.patch
new file mode 100644
index 00000000000..8930ce75856
--- /dev/null
+++ b/libraries/gnatcoll-core/compiler-error.patch
@@ -0,0 +1,28 @@
+commit 4a037b06e349a3ec0c6ad5e1dcf0814c4b44e6de
+Author: Zhu Qun-Ying <zhu.qunying@gmail.com>
+Date:   Thu Dec 5 21:09:56 2024 -0800
+
+    fix compile error
+
+diff --git a/core/src/gnatcoll-json.adb b/core/src/gnatcoll-json.adb
+index 64b4217c..e4753312 100644
+--- a/core/src/gnatcoll-json.adb
++++ b/core/src/gnatcoll-json.adb
+@@ -666,7 +666,7 @@ package body GNATCOLL.JSON is
+ 
+       Deallocate (Current_Key);
+       Free (Read_States);
+-      return (Success => True, Value => Result);
++      return R_Result : constant Read_Result := (Success => True, Value => Result);
+    exception
+       when E : Invalid_JSON_Stream =>
+          Free (Read_States);
+@@ -675,7 +675,7 @@ package body GNATCOLL.JSON is
+          begin
+             Data.Current_Text_Position (Line, Column);
+ 
+-            return (Success => False,
++            return R_Result : constant Read_Result:= (Success => False,
+                     Error => (Line, Column,
+                     To_Unbounded_String
+                        (Ada.Exceptions.Exception_Message (E))));
diff --git a/libraries/gnatcoll-core/gnatcoll-core.SlackBuild b/libraries/gnatcoll-core/gnatcoll-core.SlackBuild
new file mode 100644
index 00000000000..9c01c6a0319
--- /dev/null
+++ b/libraries/gnatcoll-core/gnatcoll-core.SlackBuild
@@ -0,0 +1,137 @@
+#!/bin/bash
+# gnatcoll-core package build script (written by zhu.qunying@gmail.com)
+# Copyright 2012-2024, Zhu Qun-Ying
+# All rights reserved.
+#
+# Redistribution and use of this script, with or without modification, is
+# permitted provided that the following conditions are met:
+#
+# 1. Redistributions of this script must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+#
+#  THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+#  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+#  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO
+#  EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+#  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+#  PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+#  OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+#  WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+#  OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+#  ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+cd $(dirname $0) ; CWD=$(pwd)
+
+PRGNAM=gnatcoll-core
+VERSION=${VERSION:-25.0.0}
+BUILD=${BUILD:-1}
+TAG=${TAG:-_SBo}
+PKGTYPE=${PKGTYPE:-tgz}
+
+if [ -z "$ARCH" ]; then
+  case "$(uname -m)" in
+    i?86) ARCH=i586 ;;
+    arm*) ARCH=arm ;;
+    *) ARCH=$(uname -m) ;;
+  esac
+  export ARCH
+fi
+
+if [ ! -z "${PRINT_PACKAGE_NAME}" ]; then
+  echo "$PRGNAM-$VERSION-$ARCH-$BUILD$TAG.$PKGTYPE"
+  exit 0
+fi
+
+TMP=${TMP:-"/tmp/SBo"}
+PKG=${TMP}/package-$PRGNAM
+OUTPUT=${OUTPUT:-/tmp}
+
+if [ "$ARCH" = "i586" ]; then
+  SLKCFLAGS="-O2 -march=i586 -mtune=i686"
+elif [ "$ARCH" = "i686" ]; then
+  SLKCFLAGS="-O2 -march=i686"
+elif [ "$ARCH" = "x86_64" ]; then
+  SLKCFLAGS="-O2 -fPIC"
+else
+  SLKCFLAGS="-O2"
+fi
+
+set -e
+
+rm -rf $PKG
+mkdir -p $TMP $PKG $OUTPUT
+cd $TMP
+rm -rf $PRGNAM-$VERSION
+mkdir $PRGNAM-$VERSION
+tar xvf $CWD/$PRGNAM-$VERSION.tar.gz -C $PRGNAM-$VERSION --strip-components=1
+
+cd $PRGNAM-$VERSION
+chown -R root:root .
+find . \
+ \( -perm 777 -o -perm 775 -o -perm 711 -o -perm 555 -o -perm 511 \) \
+ -exec chmod 755 {} \; -o \
+ \( -perm 666 -o -perm 664 -o -perm 600 -o -perm 444 -o -perm 440 -o -perm 400 \) \
+ -exec chmod 644 {} \; || exit 1
+
+ADA_FLAGS="$SLKCFLAGS"
+ADA_FLAGS="${ADA_FLAGS//-Wformat}"
+ADA_FLAGS="${ADA_FLAGS//-Werror=format-security}"
+
+patch -p1 < $CWD/compiler-error.patch
+
+COMMON_OPTIONS="-XGNATCOLL_BUILD_MODE=PROD \
+-XGNATCOLL_VERSION=$VERSION -XGNATCOLL_OS=unix "
+
+GPRINSTALL_OPTIONS="$COMMON_OPTIONS -p -f --prefix=$PKG/usr"
+GPRBUILD_OPTIONS="-R $COMMON_OPTIONS \
+-cargs $ADA_FLAGS -largs -s $LDFLAGS -gargs"
+
+sed -i 's/0.0/25.0.0/' core/config/gnatcoll_core_constants.gpr
+
+# upstream's build system too complicated to modified
+# build options. Use gprbuild directly and closely follow how upstream is built
+mkdir -p $PKG/usr/share/gpr
+export GPR_PROJECT_PATH="/usr/share/gpr:$PKG/usr/share/gpr"
+lib_types=(static relocatable static-pic)
+for lib in ${lib_types[@]} ; do
+    gprbuild -j0 $GPRBUILD_OPTIONS -XLIBRARY_TYPE=$lib \
+	    -P minimal/gnatcoll_minimal.gpr
+    gprinstall $GPRINSTALL_OPTIONS -XLIBRARY_TYPE=$lib \
+	    --sources-subdir=include/gnatcoll_minimal \
+	    --build-name=$lib --build-var=LIBRARY_TYPE \
+	    -P minimal/gnatcoll_minimal.gpr
+    gprbuild -j0 $GPRBUILD_OPTIONS -XLIBRARY_TYPE=$lib \
+	     -XGNATCOLL_BLAKE3_ARCH="$ARCH-linux" \
+	     -XGNATCOLL_XXHASH_ARCH="$ARCH" \
+	     -XGNATCOLL_MMAP="yes" -XGNATCOLL_MADVISE="yes" \
+	     -P core/gnatcoll_core.gpr
+    gprinstall $GPRINSTALL_OPTIONS -XLIBRARY_TYPE=$lib \
+	    --sources-subdir=include/gnatcoll_core \
+	    --build-name=$lib --build-var=LIBRARY_TYPE \
+	     -XGNATCOLL_BLAKE3_ARCH="$ARCH-linux" \
+	     -XGNATCOLL_XXHASH_ARCH="$ARCH" \
+	     -XGNATCOLL_MMAP="yes" -XGNATCOLL_MADVISE="yes" \
+	     -P core/gnatcoll_core.gpr
+    gprbuild -j0 $GPRBUILD_OPTIONS -XLIBRARY_TYPE=$lib \
+	    -P projects/gnatcoll_projects.gpr
+    gprinstall $GPRINSTALL_OPTIONS -XLIBRARY_TYPE=$lib \
+	    --sources-subdir=include/gnatcoll_projects \
+	    --build-name=$lib --build-var=LIBRARY_TYPE \
+	    -P projects/gnatcoll_projects.gpr
+done
+
+sed -e 's/^--  with "gnatcoll_projects"/with "gnatcoll_projects"/g' gnatcoll.gpr > $PKG/usr/share/gpr/gnatcoll.gpr
+
+make -C docs html
+mkdir -p $PKG/usr/doc/$PRGNAM-$VERSION
+cp -a ./docs/_build/html $PKG/usr/doc/$PRGNAM-$VERSION
+rm -rf $PKG/usr/doc/$PRGNAM-$VERSION/html/_sources
+
+cp README.md COPYING* $PKG/usr/doc/$PRGNAM-$VERSION
+cp $CWD/$PRGNAM.SlackBuild $PKG/usr/doc/$PRGNAM-$VERSION
+
+mkdir -p $PKG/install
+cp $CWD/slack-desc $PKG/install
+
+cd $PKG
+/sbin/makepkg -l y -c n $OUTPUT/$PRGNAM-${VERSION}-$ARCH-$BUILD$TAG.$PKGTYPE
diff --git a/libraries/gnatcoll-core/gnatcoll-core.info b/libraries/gnatcoll-core/gnatcoll-core.info
new file mode 100644
index 00000000000..f725e8515da
--- /dev/null
+++ b/libraries/gnatcoll-core/gnatcoll-core.info
@@ -0,0 +1,10 @@
+PRGNAM="gnatcoll-core"
+VERSION="25.0.0"
+HOMEPAGE="https://github.com/AdaCore/gnatcoll-core"
+DOWNLOAD="https://github.com/AdaCore/gnatcoll-core/archive/v25.0.0/gnatcoll-core-25.0.0.tar.gz"
+MD5SUM="606c9b2c6b8fe025f366b01a0fc3369a"
+DOWNLOAD_x86_64=""
+MD5SUM_x86_64=""
+REQUIRES="gprbuild libgpr Sphinx sphinx-rtd-theme"
+MAINTAINER="Zhu Qun-Ying"
+EMAIL="zhu.qunying@gmail.com"
diff --git a/libraries/gnatcoll-core/slack-desc b/libraries/gnatcoll-core/slack-desc
new file mode 100644
index 00000000000..79379f86f22
--- /dev/null
+++ b/libraries/gnatcoll-core/slack-desc
@@ -0,0 +1,19 @@
+# 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 ':' except on otherwise blank lines.
+
+             |-----handy-ruler------------------------------------------------------|
+gnatcoll-core: gnatcoll-core (GNAT Components Collection - Core packages)
+gnatcoll-core:
+gnatcoll-core: This is the core module of the GNAT Components Collection.
+gnatcoll-core:
+gnatcoll-core:
+gnatcoll-core:
+gnatcoll-core: Homepage: https://github.com/AdaCore/gnatcoll-core/
+gnatcoll-core:
+gnatcoll-core:
+gnatcoll-core:
+gnatcoll-core: