diff --git a/.github/workflows/checkCI.yml b/.github/workflows/checkCI.yml
index 6d3f838..18e0e34 100644
--- a/.github/workflows/checkCI.yml
+++ b/.github/workflows/checkCI.yml
@@ -10,8 +10,46 @@ defaults:
     shell: bash
 
 jobs:
+  build:
+    name: build_${{ matrix.platform }}
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        platform:
+          - linux32
+          - linux64
+        include:
+          - platform: linux32
+            cflags: "-O3 -DNDEBUG -fPIC -msse2 -m32"
+          - platform: linux64
+            cflags: "-O3 -DNDEBUG -fPIC"
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 5
+      - name: Build with gcc
+        run: |
+          docker run --rm -v ${{ github.workspace }}:/workspace -w /workspace ubuntu:16.04 bash -c "
+            apt-get update &&
+            apt-get install -y software-properties-common build-essential &&
+            add-apt-repository -y ppa:ubuntu-toolchain-r/test &&
+            apt-get update &&
+            apt-get install -y gcc-4.8 g++-4.8 &&
+            update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-4.8 10 &&
+            update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-4.8 10 &&
+            pushd ExternData/Resources/C-Sources &&
+            make CFLAGS=\"${{ matrix.cflags }}\" CXXFLAGS=\"${{ matrix.cflags }}\" TARGETDIR=\"${{ matrix.platform }}\"
+          "
+      - name: Upload artifacts
+        uses: actions/upload-artifact@v4
+        with:
+          name: ExternData_${{ matrix.platform }}
+          path: ExternData/Resources/Library/${{ matrix.platform }}/*.a
+
   test:
-    name: build_cmake_${{ matrix.toolchain }}
+    name: test_cmake_${{ matrix.toolchain }}
     runs-on: ${{ matrix.os }}
     timeout-minutes: 10
     strategy:
@@ -49,7 +87,7 @@ jobs:
           fi
         env:
           SRCDIR: ${{ github.workspace }}/ExternData/Resources
-      - name: Build with ${{ matrix.compiler }}
+      - name: Build tests with ${{ matrix.compiler }}
         run: |
           if [ "${{ matrix.compiler }}" == "msvc" ]; then
             cmake --build build --config ${{ matrix.configuration }}
diff --git a/ExternData/Resources/C-Sources/Makefile b/ExternData/Resources/C-Sources/Makefile
index 6203b4b..e10dfa4 100644
--- a/ExternData/Resources/C-Sources/Makefile
+++ b/ExternData/Resources/C-Sources/Makefile
@@ -2,7 +2,7 @@ AR = ar -ru
 RM = rm -f
 
 CFLAGS = -O3
-CPPFLAGS = -DHAVE_UNISTD_H=1 -DHAVE_STDARG_H=1 -DHAVE_HIDDEN=1 -DHAVE_MEMCPY=1 -DHAVE_MEMMOVE=1 -DHAVE_ZLIB=1 -DHAVE_HDF5=1 -DNDEBUG -DXML_POOR_ENTROPY -DHAVE_EXPAT_CONFIG_H -DLIBXML_STATIC
+CPPFLAGS = -DHAVE_UNISTD_H=1 -DHAVE_STDARG_H=1 -DHAVE_STDINT_H=1 -DHAVE_HIDDEN=1 -DHAVE_MEMCPY=1 -DHAVE_MEMMOVE=1 -DHAVE_ZLIB=1 -DHAVE_HDF5=1 -DNDEBUG -DXML_POOR_ENTROPY -DHAVE_EXPAT_CONFIG_H -DLIBXML_STATIC
 INC = -I"bsxml-json" -I"expat/lib" -I"hdf5/include" -I"inih" -I"libxls/include" -I"minizip" -I"modelica" -I"zlib" -I"parson" -I"libxml2/include"
 
 TARGETDIR = linux64
@@ -29,6 +29,52 @@ INI_OBJS = \
 JSON_OBJS = \
 	ED_JSONFile.o
 
+LIBXML2_OBJS = \
+	libxml2/buf.o \
+	libxml2/c14n.o \
+	libxml2/catalog.o \
+	libxml2/chvalid.o \
+	libxml2/debugXML.o \
+	libxml2/dict.o \
+	libxml2/encoding.o \
+	libxml2/entities.o \
+	libxml2/error.o \
+	libxml2/globals.o \
+	libxml2/hash.o \
+	libxml2/HTMLparser.o \
+	libxml2/HTMLtree.o \
+	libxml2/legacy.o \
+	libxml2/list.o \
+	libxml2/nanoftp.o \
+	libxml2/nanohttp.o \
+	libxml2/parser.o \
+	libxml2/parserInternals.o \
+	libxml2/pattern.o \
+	libxml2/relaxng.o \
+	libxml2/SAX.o \
+	libxml2/SAX2.o \
+	libxml2/schematron.o \
+	libxml2/threads.o \
+	libxml2/tree.o \
+	libxml2/uri.o \
+	libxml2/valid.o \
+	libxml2/xinclude.o \
+	libxml2/xlink.o \
+	libxml2/xmlIO.o \
+	libxml2/xmlmemory.o \
+	libxml2/xmlmodule.o \
+	libxml2/xmlreader.o \
+	libxml2/xmlregexp.o \
+	libxml2/xmlsave.o \
+	libxml2/xmlschemas.o \
+	libxml2/xmlschemastypes.o \
+	libxml2/xmlstring.o \
+	libxml2/xmlunicode.o \
+	libxml2/xmlwriter.o \
+	libxml2/xpath.o \
+	libxml2/xpointer.o \
+	libxml2/xzlib.o
+
 LIBXLS_OBJS = \
 	libxls/src/endian.o \
 	libxls/src/locale.o \
@@ -85,6 +131,7 @@ ALL_OBJS = \
 	$(INI_OBJS) \
 	$(JSON_OBJS) \
 	$(LIBXLS_OBJS) \
+	$(LIBXML2_OBJS) \
 	$(MAT_OBJS) \
 	$(MINIZIP_OBJS) \
 	$(PARSON_OBJS) \
@@ -96,7 +143,7 @@ ALL_OBJS = \
 
 all: clean libs
 
-libs: libED_CSVFile.a libED_INIFile.a libED_JSONFile.a libED_MATFile.a libED_XLSFile.a libED_XLSXFile.a libED_XMLFile.a libED_XML2File.a libbsxml-json.a libexpat.a libminizip.a libparson.a libxlsreader.a libzlib.a
+libs: libED_CSVFile.a libED_INIFile.a libED_JSONFile.a libED_MATFile.a libED_XLSFile.a libED_XLSXFile.a libED_XMLFile.a libED_XML2File.a libbsxml-json.a libexpat.a libminizip.a libparson.a libxlsreader.a libxml2.a libzlib.a
 	mkdir -p ../Library/$(TARGETDIR)
 	cp $^ ../Library/$(TARGETDIR)
 
@@ -139,6 +186,9 @@ libminizip.a: $(MINIZIP_OBJS)
 libxlsreader.a: $(LIBXLS_OBJS)
 	$(AR) $@ $(LIBXLS_OBJS)
 
+libxml2.a: $(LIBXML2_OBJS)
+	$(AR) $@ $(LIBXML2_OBJS)
+
 libzlib.a: $(ZLIB_OBJS)
 	$(AR) $@ $(ZLIB_OBJS)