diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
new file mode 100644
index 00000000..a54b0628
--- /dev/null
+++ b/.github/workflows/build.yml
@@ -0,0 +1,276 @@
+name: C/C++ CI
+
+on:
+  push:
+    branches: [master]
+    paths-ignore:
+      - '**.md'
+
+  pull_request:
+    types: [opened, reopened, synchronize]
+  release:
+    types: [published]
+
+jobs:
+  windows:
+    name: 'Windows'
+    runs-on: windows-latest
+
+    env:
+      solution: 'msvc/ReGameDLL.sln'
+      buildPlatform: 'Win32'
+      buildRelease: 'Release'
+      buildReleasePlay: 'Release Play'
+      buildTests: 'Tests'
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+
+      - name: Setup Nuget
+        uses: nuget/setup-nuget@v1
+        with:
+          nuget-api-key: ${{ secrets.NuGetAPIKey }}
+          nuget-version: '5.x'
+
+      - run: nuget restore '${{ env.solution }}'
+
+      - name: Setup MSBuild
+        uses: microsoft/setup-msbuild@v1.0.2
+        with:
+          vs-version: '16.8'
+
+      - name: Build and Run unittests
+        run: |
+          msbuild ${{ env.solution }} -p:Configuration="${{ env.buildTests }}" /t:Clean,Build /p:Platform=${{ env.buildPlatform }} /p:PlatformToolset=v140_xp /p:XPDeprecationWarning=false
+          .\"msvc\Tests\mp.exe"
+          If ($LASTEXITCODE -ne 0 -And
+          $LASTEXITCODE -ne 3)
+          {[Environment]::Exit(1)}
+        shell: "pwsh"
+
+      - name: Build
+        run: |
+          msbuild ${{ env.solution }} -p:Configuration="${{ env.buildRelease }}" /t:Clean,Build /p:Platform=${{ env.buildPlatform }} /p:PlatformToolset=v140_xp /p:XPDeprecationWarning=false
+          msbuild ${{ env.solution }} -p:Configuration="${{ env.buildReleasePlay }}" /t:Clean,Build /p:Platform=${{ env.buildPlatform }} /p:PlatformToolset=v140_xp /p:XPDeprecationWarning=false
+
+      - name: Move files
+        run: |
+          mkdir publish\debug
+          mkdir publish\tests
+          mkdir publish\bin\win32\cstrike\dlls
+          move "msvc\${{ env.buildReleasePlay }}\mp.dll" publish\tests\mp.dll
+          move msvc\${{ env.buildRelease }}\mp.dll publish\bin\win32\cstrike\dlls\mp.dll
+          move msvc\${{ env.buildRelease }}\mp.pdb publish\debug\mp.pdb
+
+      - name: Deploy artifacts
+        uses: actions/upload-artifact@v2
+        with:
+          name: win32
+          path: publish/*
+
+  testdemos:
+    name: 'Test demos'
+    runs-on: ubuntu-latest
+    container: s1lentq/testdemos:latest
+    needs: [windows]
+
+    env:
+      WINEDEBUG: -all
+      WINEDLLOVERRIDES: mshtml=
+
+    defaults:
+      run:
+        shell: bash
+        working-directory: ../../../opt/HLDS
+
+    steps:
+      - name: Deploying windows artifacts
+        uses: actions/download-artifact@v2
+        with:
+          name: win32
+
+      - name: Play demos
+        run: |
+          chown root ~
+          cp -r deps/regamedll/* .
+          mv $GITHUB_WORKSPACE/tests/mp.dll cstrike/dlls/mp.dll
+
+          descs=(
+            "CS: Testing jumping, scenarios, shooting etc"
+          )
+
+          demos=(
+            "cstrike-basic-1"
+          )
+
+          retVal=0
+          for i in "${!demos[@]}"; do
+            params=$(cat "testdemos/${demos[i]}.params")
+
+            echo -e "\e[1m[$((i + 1))/${#demos[@]}] \e[1;36m${descs[i]} testing...\e[0m"
+            echo -e "    - \e[0;33mParameters $params\e[0m"
+
+            wine hlds.exe --rehlds-enable-all-hooks --rehlds-test-play "testdemos/${demos[i]}.bin" $params &> result.log || retVal=$?
+
+            if [ $retVal -ne 777 ] && [ $retVal -ne 9 ]; then
+              # Print with catchy messages
+              while read line; do
+                echo -e "      \e[0;33m$line"
+              done <<< $(cat result.log | sed '0,/demo failed/I!d;/wine:/d;/./,$!d')
+
+              echo "      🔸  🔸  🔸  🔸  🔸  🔸  🔸  🔸  🔸  🔸"
+              while read line; do
+                echo -e "      \e[1;31m$line";
+              done < rehlds_demo_error.txt
+              echo -e "      \e[30;41mExit code: $retVal\e[0m"
+              echo -e "\e[1m[$((i + 1))/${#demos[@]}] \e[1;36m${descs[i]} testing...\e[1;31m Failed ❌"
+              exit 6 # Test demo failed
+            else
+              # Print result HLDS console
+              while read line; do
+                echo -e "      \e[0;33m$line"
+              done <<< $(cat result.log | sed '/wine:/d;/./,$!d')
+              echo -e "      \e[30;43mExit code: $retVal\e[0m"
+              echo -e "\e[1m[$((i + 1))/${#demos[@]}] \e[1;36m${descs[i]} testing...\e[1;32m Succeed ✔"
+            fi
+          done
+
+  linux:
+    name: 'Linux'
+    runs-on: ubuntu-latest
+    container: s1lentq/linux86buildtools:latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+          submodules: true
+
+      - name: Build and Run unittests
+        run: |
+          rm -rf build && CC=icc CXX=icpc cmake -DCMAKE_BUILD_TYPE=Unittests -B build && cmake --build build -j8
+          retVal=0
+          ./build/regamedll/cs 2> /dev/null > result.log || retVal=$?
+          while read line; do
+            if [[ ${line} == *"Warning in test"* ]] ; then
+              echo -e "\e[2;38m$line"
+            elif [[ ${line} == *"Failure in test"* ]] ; then
+              echo -e "\e[1;31m$line"
+            else
+              echo -e "\e[0;33m$line"
+            fi
+          done <<< $(cat result.log)
+
+          if [ $retVal -ne 0 ] && [ $retVal -ne 3 ]; then
+            echo -e "\e[30;41mExit code: $retVal\e[0m"
+            exit 1 # Unittest failed
+          else
+            echo -e "\e[30;43mExit code: $retVal\e[0m"
+          fi
+        shell: bash
+
+      - name: Build using Intel C++ Compiler 19.0
+        run: |
+          rm -rf build-icc && CC=icc CXX=icpc cmake -B build-icc && cmake --build build-icc -j8
+
+      - name: Build using GCC Compiler 9.3
+        run: |
+          rm -rf build-gcc && CC=gcc CXX=g++ cmake -B build-gcc && cmake --build build-gcc -j8
+
+      - name: Prepare CSSDK
+        run: |
+          mkdir -p publish/cssdk
+          rsync -a regamedll/extra/cssdk/ publish/cssdk/ --exclude=.git --exclude=LICENSE --exclude=README.md
+
+      - name: Move files
+        run: |
+          mkdir -p publish/bin/linux32/cstrike/dlls
+          mv build-icc/regamedll/cs.so publish/bin/linux32/cstrike/dlls/cs.so
+          mv build-gcc/regamedll/cs.so publish/cs-gcc.so
+          mv regamedll/version/appversion.h publish/appversion.h
+
+      - name: Run GLIBC/ABI version compat test
+        run: |
+          binaries=(
+            "publish/bin/linux32/cstrike/dlls/cs.so"
+            "publish/cs-gcc.so"
+          )
+          bash ./regamedll/version/glibc_test.sh ${binaries[@]}
+          if [[ $? -ne 0 ]]; then
+            exit 1 # Assertion failed
+          fi
+        shell: bash
+
+      - name: Deploy artifacts
+        uses: actions/upload-artifact@v2
+        id: upload-job
+        with:
+          name: linux32
+          path: publish/*
+
+      - name: Cleanup temporary artifacts
+        if: success() && steps.upload-job.outcome == 'success'
+        run: |
+          rm -rf cssdk
+          rm -f appversion.h
+
+  publish:
+    name: 'Publish'
+    runs-on: ubuntu-latest
+    needs: [windows, testdemos, linux]
+
+    steps:
+      - name: Deploying linux artifacts
+        uses: actions/download-artifact@v2
+        with:
+          name: linux32
+
+      - name: Deploying windows artifacts
+        uses: actions/download-artifact@v2
+        with:
+          name: win32
+
+      - name: Reading appversion.h
+        run: |
+          if [ -e appversion.h ]; then
+            APP_VERSION=$(cat appversion.h | grep -wi '#define APP_VERSION_STRD' | sed -e 's/#define APP_VERSION_STRD[ \t\r\n\v\f]\+\(.*\)/\1/i' -e 's/\r//g')
+            if [ $? -ne 0 ]; then
+              APP_VERSION=""
+            else
+              # Remove quotes
+              APP_VERSION=$(echo $APP_VERSION | xargs)
+              echo "APP_VERSION=${APP_VERSION}" >> $GITHUB_ENV
+            fi
+          fi
+          rm -f appversion.h
+
+      - name: Packaging bin/dbg
+        id: packaging-job
+        if: |
+          github.event_name == 'release' &&
+          github.event.action == 'published' &&
+          startsWith(github.ref, 'refs/tags/')
+        run: |
+          7z a -tzip regamedll-bin-${{ env.APP_VERSION }}.zip bin/ cssdk/
+
+      - name: Publish artifacts
+        uses: softprops/action-gh-release@v1
+        id: publish-job
+        if: |
+          startsWith(github.ref, 'refs/tags/') &&
+          steps.packaging-job.outcome == 'success'
+        with:
+          files: |
+            *.zip
+        env:
+          GITHUB_TOKEN: ${{ secrets.API_TOKEN }}
+
+      - name: Cleanup temporary artifacts
+        if: success() && steps.publish-job.outcome == 'success'
+        run: |
+          rm -rf bin debug cssdk
+          rm -f *.zip appversion.h
diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 00000000..5fe6d887
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "regamedll/extra/cssdk"]
+	path = regamedll/extra/cssdk
+	url = https://github.com/s1lentq/CSSDK.git
\ No newline at end of file
diff --git a/CMakeLists.txt b/CMakeLists.txt
new file mode 100644
index 00000000..e8bfc73d
--- /dev/null
+++ b/CMakeLists.txt
@@ -0,0 +1,12 @@
+cmake_minimum_required(VERSION 3.1)
+project(regamedll CXX)
+
+if (WIN32)
+	message(FATAL_ERROR "CMakeLists.txt Windows platform isn't supported yet. Use msvc/ReGameDLL.sln instead it!")
+endif()
+
+add_custom_target(appversion DEPENDS
+	COMMAND "${PROJECT_SOURCE_DIR}/regamedll/version/appversion.sh" "${PROJECT_SOURCE_DIR}"
+)
+
+add_subdirectory(regamedll)
diff --git a/README.md b/README.md
index 37f44c15..11f3b0a1 100644
--- a/README.md
+++ b/README.md
@@ -105,72 +105,81 @@ Archive's bin directory contains 2 subdirectories, 'bugfixed' and 'pure'
 * Enter `-bots` option at the command line HLDS
 
 ## Build instructions
-There are several software requirements for building Regamedll_CS:
-<ol>
-<li>Java Development Kit (JDK) 7+ (http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html)</li>
-<li>For Windows: Visual Studio 2015 and later</li>
-<li>For Linux: GCC/Clang/Intel C++ Compiler 15 and later</li>
-</ol>
-
 ### Checking requirements
-#### JDK version
-Windows<pre>&gt; %JAVA_HOME%\bin\javac -version
-javac 1.8.0_25
+There are several software requirements for building ReGameDLL_CS:
+
+#### Windows
+<pre>
+Visual Studio 2013 and later
 </pre>
 
-Linux
-<pre>$ javac -version
-javac 1.7.0_65
+#### Linux
+<pre>
+git >= 1.8.5
+cmake >= 3.10
+GCC >= 4.9.2 (Optional)
+ICC >= 15.0.1 20141023 (Optional)
+LLVM (Clang) >= 6.0 (Optional)
 </pre>
 
-#### Visual Studio
-Help -> About
+### Building
 
-#### ICC
-<pre>$ icc --version
-icc (ICC) 15.0.1 20141023
+#### Windows
+Use `Visual Studio` to build, open `msvc/ReGameDLL.sln` and just select from the solution configurations list `Release` or `Debug`
+
+#### Linux
+
+* Optional options using `build.sh --compiler=[gcc] --jobs=[4]` (without square brackets)
+<pre>
+-c=|--compiler=[icc|gcc|clang]  - Select preferred C/C++ compiler to build
+-j=|--jobs=[N]                  - Specifies the number of jobs (commands) to run simultaneously (For faster building)
 </pre>
 
-### Building and run unit tests using gradle
-#### On Windows:
-<pre>gradlew --max-workers=1 clean buildRelease</pre>
-* For faster building without unit tests use this:exclamation:
-<pre>gradlew --max-workers=1 clean buildFixes</pre>
-
-#### On Linux (ICC):
-<pre>./gradlew --max-workers=1 clean buildRelease</pre>
-
-* For faster building without unit tests use this:exclamation:
-<pre>./gradlew --max-workers=1 clean buildFixes</pre>
-
-#### On Linux (Clang):
-<pre>./gradlew --max-workers=1 clean -PuseClang buildRelease</pre>
-
-* For faster building without unit tests use this:exclamation:
-<pre>./gradlew --max-workers=1 clean -PuseClang buildFixes</pre>
-
-#### On Linux (GCC):
-<pre>./gradlew --max-workers=1 clean -PuseGcc buildRelease</pre>
-
-* For faster building without unit tests use this:exclamation:
-<pre>./gradlew --max-workers=1 clean -PuseGcc buildFixes</pre>
-
-Compiled binaries will be placed in the build/binaries/ directory
-
-### Simplified building using CMake 3.1 and later
-#### On Windows:
-<pre>Open solution msvc\ReGameDLL.sln and build it</pre>
-
-#### On Linux:
-* Run script `regamedll/compile.sh`
-* Options using `regamedll/compile.sh -D[option]=[ON or OFF]` (without square brackets)
+* Optional definitions using `build.sh -D[option]=[ON or OFF]` (without square brackets)
 <pre>
 DEBUG              - Enables debugging mode
-USE_INTEL_COMPILER - Switch main compiler to ICC
-USE_CLANG_COMPILER - Switch main compiler to Clang
 USE_STATIC_LIBSTDC - Enables static linking library libstdc++
 </pre>
 
+<ul>
+<li>
+ICC:
+<pre>./build.sh --compiler=intel</pre>
+</li>
+
+<li>
+LLVM (Clang):
+<pre>./build.sh --compiler=clang</pre>
+</li>
+
+<li>
+GCC:
+<pre>./build.sh --compiler=gcc</pre>
+</li>
+</ul>
+
+##### Checking build environment (Debian / Ubuntu)
+
+<details>
+<summary>Click to expand</summary>
+
+* Installing required packages
+<pre>
+sudo dpkg --add-architecture i386
+sudo apt-get update
+sudo apt-get install -y gcc-multilib g++-multilib
+sudo apt-get install -y build-essential
+sudo apt-get install -y libc6-dev libc6-dev-i386
+</pre>
+
+* Select the preferred C/C++ Compiler installation
+<pre>
+1) sudo apt-get install -y gcc g++
+2) sudo apt-get install -y clang
+</pre>
+
+</details>
+
 ### Credits
 Thanks to the project [ReHLDS](https://github.com/dreamstalker/rehlds) ( ReGameDLL_CS was created on the basis of ReHLDS )
 
diff --git a/build.sh b/build.sh
new file mode 100755
index 00000000..9b49a8da
--- /dev/null
+++ b/build.sh
@@ -0,0 +1,39 @@
+#!/bin/bash
+
+CC=gcc
+CXX=g++
+
+n=0
+args=()
+for i in "$@"
+do
+case $i in
+	-j=*|--jobs=*)
+		jobs="-j${i#*=}"
+		shift
+	;;
+	-c=*|--compiler=*)
+		C="${i#*=}"
+		shift
+	;;
+	*)
+	args[$n]="$i"
+	((++n))
+	;;
+esac
+done
+
+case "$C" in
+	("intel"|"icc")	CC=icc CXX=icpc ;;
+	("gcc"|"g++")	CC=gcc CXX=g++ ;;
+	("clang|llvm")	CC=clang CXX=clang++ ;;
+	*)
+	;;
+esac
+
+rm -rf build
+mkdir build
+pushd build &> /dev/null
+CC=$CC CXX=$CXX cmake ${args[@]} ..
+make ${jobs}
+popd > /dev/null
diff --git a/dep/cppunitlite/CMakeLists.txt b/dep/cppunitlite/CMakeLists.txt
new file mode 100644
index 00000000..10047e7e
--- /dev/null
+++ b/dep/cppunitlite/CMakeLists.txt
@@ -0,0 +1,25 @@
+cmake_minimum_required(VERSION 3.1)
+project(cppunitlite CXX)
+
+add_library(cppunitlite STATIC)
+
+target_sources(cppunitlite PRIVATE
+	src/Test.cpp
+	src/TestResult.cpp
+	src/TestRegistry.cpp
+	src/Assertions.cpp
+	src/MainAdapter.cpp
+)
+
+target_include_directories(cppunitlite PRIVATE
+	"${PROJECT_SOURCE_DIR}/src"
+	"${PROJECT_SOURCE_DIR}/include"
+)
+
+target_compile_definitions(cppunitlite PRIVATE
+	_GLIBCXX_USE_CXX11_ABI=0
+)
+
+target_compile_options(cppunitlite PRIVATE
+	-m32
+)
diff --git a/regamedll/CMakeLists.txt b/regamedll/CMakeLists.txt
index c357185b..3bee1575 100644
--- a/regamedll/CMakeLists.txt
+++ b/regamedll/CMakeLists.txt
@@ -1,70 +1,105 @@
+#----------------------------------------
+# 1. Preparing build:
+#    rm -rf build
+#    mkdir build && cd build
+#
+# 2. Select compiler and build it
+# - Compile with Clang:
+#    CC="clang" CXX="clang++" cmake ..
+#    make
+#
+# - Compile with Intel C++ Compiler:
+#    CC="icc" CXX="icpc" cmake ..
+#    make
+#
+# - Compile with GCC Compiler:
+#    cmake ..
+#    make
+#----------------------------------------
+
 cmake_minimum_required(VERSION 3.1)
 project(regamedll CXX)
 
-option(DEBUG "Build debug application." OFF)
-option(USE_INTEL_COMPILER "Use the Intel compiler." OFF)
-option(USE_CLANG_COMPILER "Use the Clang compiler." OFF)
+option(DEBUG "Build with debug information." OFF)
 option(USE_STATIC_LIBSTDC "Enables static linking libstdc++." OFF)
 
 set(CMAKE_CXX_STANDARD 14)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
 
-if (USE_INTEL_COMPILER)
-	set(CMAKE_C_COMPILER	"/opt/intel/bin/icc")
-	set(CMAKE_CXX_COMPILER	"/opt/intel/bin/icpc")
-elseif (USE_CLANG_COMPILER)
-	set(CMAKE_C_COMPILER	"/usr/bin/clang")
-	set(CMAKE_CXX_COMPILER	"/usr/bin/clang++")
-endif()
+# Avoid -rdynamic -fPIC options
+set(CMAKE_SHARED_LIBRARY_CXX_FLAGS "")
+set(CMAKE_SHARED_LIBRARY_LINK_CXX_FLAGS "")
 
-set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fno-exceptions")
+set(COMPILE_FLAGS "-m32 -U_FORTIFY_SOURCE")
+set(LINK_FLAGS "-m32 -s")
 
-if (USE_INTEL_COMPILER OR USE_CLANG_COMPILER)
-	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fasm-blocks")
-endif()
+set(COMPILE_FLAGS "${COMPILE_FLAGS} -Wall -fno-exceptions -fno-builtin -Wno-unknown-pragmas")
+
+# Remove noxref code and data
+set(COMPILE_FLAGS "${COMPILE_FLAGS} -ffunction-sections -fdata-sections")
 
 if (DEBUG)
-	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -g3 -ggdb -O3 -Wall -ffunction-sections -fdata-sections")
+	set(COMPILE_FLAGS "${COMPILE_FLAGS} -g3 -O3 -ggdb")
 else()
-	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -g0 -O3 -fno-rtti -ffunction-sections -fdata-sections")
+	set(COMPILE_FLAGS "${COMPILE_FLAGS} -g0 -O3 -fno-stack-protector")
 endif()
 
-if (USE_INTEL_COMPILER)
-	set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -static-intel -no-intel-extensions")
-else()
-	## Produce code optimized for the most common IA32/AMD64/EM64T processors.
-	## As new processors are deployed in the marketplace, the behavior of this option will change.
-	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}\
-		-mtune=generic -msse3\
-		-Wno-write-strings -Wno-invalid-offsetof\
-		-Wno-unused-variable -Wno-unused-function\
-		-Wno-unused-result -Wno-invalid-offsetof\
-		-fpermissive -Wno-switch -Wno-enum-compare\
-		-Wno-unknown-pragmas -Wno-unused-value")
+# Check Intel C++ compiler
+if ("$ENV{CXX}" MATCHES "icpc")
+	# -fp-model=precise
+	# ICC uses -fp-model fast=1 by default for more aggressive optimizations on floating-point calculations
+	# https://software.intel.com/content/www/us/en/develop/documentation/cpp-compiler-developer-guide-and-reference/top/compiler-reference/compiler-options/compiler-option-details/floating-point-options/fp-model-fp.html#fp-model-fp_GUID-99936BBA-1508-4E9F-AC09-FA98613CE2F5
+	set(COMPILE_FLAGS "${COMPILE_FLAGS} \
+		-fp-model=precise\
+		-fasm-blocks\
+		-Qoption,cpp,--treat_func_as_string_literal_cpp")
 
-	if (USE_CLANG_COMPILER)
-		set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}\
+	set(LINK_FLAGS "${LINK_FLAGS} -static-intel -no-intel-extensions")
+
+	if (NOT DEBUG)
+		set(COMPILE_FLAGS "${COMPILE_FLAGS} -ipo")
+		set(LINK_FLAGS "${LINK_FLAGS} -ipo")
+	endif()
+else()
+	# Produce code optimized for the most common IA32/AMD64/EM64T processors.
+	# As new processors are deployed in the marketplace, the behavior of this option will change.
+	set(COMPILE_FLAGS "${COMPILE_FLAGS} \
+		-mtune=generic -msse3\
+		-fpermissive -fno-sized-deallocation\
+		-Wno-delete-non-virtual-dtor -Wno-invalid-offsetof\
+		-Wno-unused-variable -Wno-unused-value -Wno-unused-result -Wno-unused-function\
+		-Wno-write-strings -Wno-switch -Wno-enum-compare\
+		-Wno-sign-compare -Wno-format -Wno-ignored-attributes -Wno-strict-aliasing")
+
+	# Check Clang compiler
+	if ("$ENV{CXX}" MATCHES "clang")
+		set(COMPILE_FLAGS "${COMPILE_FLAGS} \
 			-Wno-unused-local-typedef\
 			-Wno-unused-private-field\
 			-fno-strict-vtable-pointers\
 			-Wno-overloaded-virtual")
 	else()
-		set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}\
+		set(COMPILE_FLAGS "${COMPILE_FLAGS} \
+			-fno-plt\
+			-fno-devirtualize\
 			-Wno-unused-local-typedefs\
-			-Wno-sign-compare\
-			-Wno-strict-aliasing\
-			-Wno-unused-but-set-variable\
-			-fno-devirtualize")
+			-Wno-unused-but-set-variable")
+
+		# GCC >= 8.3
+		if (CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL 8.0)
+			set(COMPILE_FLAGS "${COMPILE_FLAGS} -Wno-stringop-truncation -Wno-format-truncation -Wno-class-memaccess")
+		endif()
 	endif()
 endif()
 
-if (NOT DEBUG AND USE_STATIC_LIBSTDC)
-	set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -Wl,-gc-sections -Wl,--version-script=\"${PROJECT_SOURCE_DIR}/../version_script.lds\"")
+# GCC >= 8.3
+if (CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL 8.0)
+	set(COMPILE_FLAGS "${COMPILE_FLAGS} -fcf-protection=none")
 endif()
 
-if (USE_STATIC_LIBSTDC)
-	add_definitions(-DBUILD_STATIC_LIBSTDC)
-	set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -static-libgcc -static-libstdc++")
+if (NOT DEBUG)
+	set(LINK_FLAGS "${LINK_FLAGS} \
+		-Wl,-gc-sections -Wl,--version-script=\"${PROJECT_SOURCE_DIR}/../version_script.lds\"")
 endif()
 
 set(PROJECT_SRC_DIR
@@ -75,6 +110,11 @@ set(PROJECT_SRC_DIR
 	"${PROJECT_SOURCE_DIR}/game_shared"
 	"${PROJECT_SOURCE_DIR}/pm_shared"
 	"${PROJECT_SOURCE_DIR}/regamedll"
+	"${PROJECT_SOURCE_DIR}/unittests"
+)
+
+set(PROJECT_CPPUNITLITE_DIR
+	"${PROJECT_SOURCE_DIR}/../dep/cppunitlite/include"
 )
 
 set(PROJECT_PUBLIC_DIR
@@ -86,63 +126,244 @@ set(ENGINE_SRCS
 	"engine/unicode_strtools.cpp"
 )
 
-file(GLOB SHARED_SRCS
-	"game_shared/bot/*.cpp"
-	"game_shared/*.cpp"
-	"pm_shared/*.cpp"
-	"regamedll/*.cpp"
+set(SHARED_SRCS
+	"game_shared/shared_util.cpp"
+	"game_shared/voice_gamemgr.cpp"
+	"game_shared/bot/bot.cpp"
+	"game_shared/bot/bot_manager.cpp"
+	"game_shared/bot/bot_profile.cpp"
+	"game_shared/bot/bot_util.cpp"
+	"game_shared/bot/nav_area.cpp"
+	"game_shared/bot/nav_file.cpp"
+	"game_shared/bot/nav_node.cpp"
+	"game_shared/bot/nav_path.cpp"
+	"pm_shared/pm_debug.cpp"
+	"pm_shared/pm_math.cpp"
+	"pm_shared/pm_shared.cpp"
+	"regamedll/regamedll.cpp"
+	"regamedll/precompiled.cpp"
+	"regamedll/public_amalgamation.cpp"
+	"regamedll/hookchains_impl.cpp"
+	"regamedll/sse_mathfun.cpp"
 	"public/FileSystem.cpp"
 	"public/interface.cpp"
 	"public/MemPool.cpp"
-	"version/version.cpp"
 )
 
-list(REMOVE_ITEM SHARED_SRCS EXCLUDE "${PROJECT_SOURCE_DIR}/regamedll/classes_dummy.cpp")
-
-file(GLOB GAMEDLL_SRCS
-	"dlls/*.cpp"
-	"dlls/API/*.cpp"
-	"dlls/addons/*.cpp"
-	"dlls/wpn_shared/*.cpp"
-	"dlls/bot/*.cpp"
-	"dlls/bot/states/*.cpp"
-	"dlls/hostage/*.cpp"
-	"dlls/hostage/states/*.cpp"
+set(GAMEDLL_SRCS
+	"dlls/airtank.cpp"
+	"dlls/ammo.cpp"
+	"dlls/animating.cpp"
+	"dlls/animation.cpp"
+	"dlls/basemonster.cpp"
+	"dlls/bmodels.cpp"
+	"dlls/buttons.cpp"
+	"dlls/career_tasks.cpp"
+	"dlls/cbase.cpp"
+	"dlls/client.cpp"
+	"dlls/cmdhandler.cpp"
+	"dlls/combat.cpp"
+	"dlls/debug.cpp"
+	"dlls/doors.cpp"
+	"dlls/effects.cpp"
+	"dlls/explode.cpp"
+	"dlls/func_break.cpp"
+	"dlls/func_tank.cpp"
+	"dlls/game.cpp"
+	"dlls/gamerules.cpp"
+	"dlls/ggrenade.cpp"
+	"dlls/gib.cpp"
+	"dlls/globals.cpp"
+	"dlls/h_battery.cpp"
+	"dlls/h_cycler.cpp"
+	"dlls/h_export.cpp"
+	"dlls/healthkit.cpp"
+	"dlls/hintmessage.cpp"
+	"dlls/items.cpp"
+	"dlls/lights.cpp"
+	"dlls/mapinfo.cpp"
+	"dlls/maprules.cpp"
+	"dlls/mortar.cpp"
+	"dlls/multiplay_gamerules.cpp"
+	"dlls/observer.cpp"
+	"dlls/pathcorner.cpp"
+	"dlls/plats.cpp"
+	"dlls/player.cpp"
+	"dlls/revert_saved.cpp"
+	"dlls/saverestore.cpp"
+	"dlls/singleplay_gamerules.cpp"
+	"dlls/skill.cpp"
+	"dlls/sound.cpp"
+	"dlls/soundent.cpp"
+	"dlls/spectator.cpp"
+	"dlls/subs.cpp"
+	"dlls/training_gamerules.cpp"
+	"dlls/triggers.cpp"
+	"dlls/tutor.cpp"
+	"dlls/tutor_base_states.cpp"
+	"dlls/tutor_base_tutor.cpp"
+	"dlls/tutor_cs_states.cpp"
+	"dlls/tutor_cs_tutor.cpp"
+	"dlls/util.cpp"
+	"dlls/vehicle.cpp"
+	"dlls/weapons.cpp"
+	"dlls/weapontype.cpp"
+	"dlls/world.cpp"
+	"dlls/API/CAPI_Impl.cpp"
+	"dlls/API/CSEntity.cpp"
+	"dlls/API/CSPlayer.cpp"
+	"dlls/API/CSPlayerItem.cpp"
+	"dlls/addons/item_airbox.cpp"
+	"dlls/addons/point_command.cpp"
+	"dlls/addons/trigger_random.cpp"
+	"dlls/addons/trigger_setorigin.cpp"
+	"dlls/wpn_shared/wpn_ak47.cpp"
+	"dlls/wpn_shared/wpn_aug.cpp"
+	"dlls/wpn_shared/wpn_awp.cpp"
+	"dlls/wpn_shared/wpn_c4.cpp"
+	"dlls/wpn_shared/wpn_deagle.cpp"
+	"dlls/wpn_shared/wpn_elite.cpp"
+	"dlls/wpn_shared/wpn_famas.cpp"
+	"dlls/wpn_shared/wpn_fiveseven.cpp"
+	"dlls/wpn_shared/wpn_flashbang.cpp"
+	"dlls/wpn_shared/wpn_g3sg1.cpp"
+	"dlls/wpn_shared/wpn_galil.cpp"
+	"dlls/wpn_shared/wpn_glock18.cpp"
+	"dlls/wpn_shared/wpn_hegrenade.cpp"
+	"dlls/wpn_shared/wpn_knife.cpp"
+	"dlls/wpn_shared/wpn_m3.cpp"
+	"dlls/wpn_shared/wpn_m4a1.cpp"
+	"dlls/wpn_shared/wpn_m249.cpp"
+	"dlls/wpn_shared/wpn_mac10.cpp"
+	"dlls/wpn_shared/wpn_mp5navy.cpp"
+	"dlls/wpn_shared/wpn_p90.cpp"
+	"dlls/wpn_shared/wpn_p228.cpp"
+	"dlls/wpn_shared/wpn_scout.cpp"
+	"dlls/wpn_shared/wpn_sg550.cpp"
+	"dlls/wpn_shared/wpn_sg552.cpp"
+	"dlls/wpn_shared/wpn_smokegrenade.cpp"
+	"dlls/wpn_shared/wpn_tmp.cpp"
+	"dlls/wpn_shared/wpn_ump45.cpp"
+	"dlls/wpn_shared/wpn_usp.cpp"
+	"dlls/wpn_shared/wpn_xm1014.cpp"
+	"dlls/bot/cs_bot.cpp"
+	"dlls/bot/cs_bot_chatter.cpp"
+	"dlls/bot/cs_bot_event.cpp"
+	"dlls/bot/cs_bot_init.cpp"
+	"dlls/bot/cs_bot_learn.cpp"
+	"dlls/bot/cs_bot_listen.cpp"
+	"dlls/bot/cs_bot_manager.cpp"
+	"dlls/bot/cs_bot_nav.cpp"
+	"dlls/bot/cs_bot_pathfind.cpp"
+	"dlls/bot/cs_bot_radio.cpp"
+	"dlls/bot/cs_bot_statemachine.cpp"
+	"dlls/bot/cs_bot_update.cpp"
+	"dlls/bot/cs_bot_vision.cpp"
+	"dlls/bot/cs_bot_weapon.cpp"
+	"dlls/bot/cs_gamestate.cpp"
+	"dlls/bot/states/cs_bot_attack.cpp"
+	"dlls/bot/states/cs_bot_buy.cpp"
+	"dlls/bot/states/cs_bot_defuse_bomb.cpp"
+	"dlls/bot/states/cs_bot_escape_from_bomb.cpp"
+	"dlls/bot/states/cs_bot_fetch_bomb.cpp"
+	"dlls/bot/states/cs_bot_follow.cpp"
+	"dlls/bot/states/cs_bot_hide.cpp"
+	"dlls/bot/states/cs_bot_hunt.cpp"
+	"dlls/bot/states/cs_bot_idle.cpp"
+	"dlls/bot/states/cs_bot_investigate_noise.cpp"
+	"dlls/bot/states/cs_bot_move_to.cpp"
+	"dlls/bot/states/cs_bot_plant_bomb.cpp"
+	"dlls/bot/states/cs_bot_use_entity.cpp"
+	"dlls/hostage/hostage.cpp"
+	"dlls/hostage/hostage_improv.cpp"
+	"dlls/hostage/hostage_localnav.cpp"
+	"dlls/hostage/states/hostage_animate.cpp"
+	"dlls/hostage/states/hostage_escape.cpp"
+	"dlls/hostage/states/hostage_follow.cpp"
+	"dlls/hostage/states/hostage_idle.cpp"
+	"dlls/hostage/states/hostage_retreat.cpp"
 )
 
-include_directories(
+set(UNITTESTS_SRCS
+	"unittests/animation_tests.cpp"
+	"unittests/struct_offsets_tests.cpp"
+	"unittests/TestRunner.cpp"
+)
+
+if (CMAKE_BUILD_TYPE MATCHES Unittests)
+	if (NOT TARGET cppunitlite)
+		add_subdirectory(../dep/cppunitlite cppunitlite)
+	endif()
+
+	set(LINK_FLAGS "${LINK_FLAGS} -no-pie -Wl,--no-export-dynamic")
+	add_executable(regamedll ${appversion.sh})
+	target_link_libraries(regamedll PRIVATE cppunitlite)
+else()
+	add_library(regamedll SHARED ${appversion.sh})
+endif()
+
+if (NOT TARGET appversion)
+	add_custom_target(appversion DEPENDS COMMAND "${PROJECT_SOURCE_DIR}/version/appversion.sh" "${PROJECT_SOURCE_DIR}/..")
+endif()
+
+add_dependencies(regamedll appversion)
+
+target_include_directories(regamedll PRIVATE
 	${PROJECT_SRC_DIR}
+	${PROJECT_CPPUNITLITE_DIR}
 	${PROJECT_PUBLIC_DIR}
 )
 
-link_directories(${PROJECT_SOURCE_DIR}/lib/linux32)
-
-add_definitions(
-	-DREGAMEDLL_FIXES
-	-DBUILD_LATEST
-	-DREGAMEDLL_ADD
-	-DREGAMEDLL_API
-	-DUNICODE_FIXES
-	-DCLIENT_WEAPONS
-	-DUSE_QSTRING
-	-DGNUC
-	-DPOSIX
-	-D_LINUX
-	-DLINUX
-	-D_stricmp=strcasecmp
-	-D_strnicmp=strncasecmp
-	-D_strdup=strdup
-	-D_unlink=unlink
-	-D_vsnprintf=vsnprintf
-	-D_write=write
-	-D_close=close
-	-D_access=access
-	-D_vsnwprintf=vswprintf
+target_compile_definitions(regamedll PRIVATE
+	REGAMEDLL_FIXES
+	REGAMEDLL_API
+	REGAMEDLL_ADD
+	UNICODE_FIXES
+	BUILD_LATEST
+	CLIENT_WEAPONS
+	USE_QSTRING
+	_LINUX
+	LINUX
+	NDEBUG
+	_GLIBCXX_USE_CXX11_ABI=0
+	_stricmp=strcasecmp
+	_strnicmp=strncasecmp
+	_strdup=strdup
+	_unlink=unlink
+	_vsnprintf=vsnprintf
+	_write=write
+	_close=close
+	_access=access
+	_vsnwprintf=vswprintf
 )
 
-add_library(regamedll SHARED ${appversion.sh} ${GAMEDLL_SRCS} ${ENGINE_SRCS} ${SHARED_SRCS})
-set_property(TARGET regamedll PROPERTY LIBRARY_OUTPUT_NAME cs)
-add_custom_target(appversion DEPENDS COMMAND "${PROJECT_SOURCE_DIR}/version/appversion.sh" "${PROJECT_SOURCE_DIR}")
-set_target_properties(regamedll PROPERTIES PREFIX "" COMPILE_FLAGS "-m32" LINK_FLAGS "-m32" POSITION_INDEPENDENT_CODE ON)
-target_link_libraries(regamedll dl aelf32)
-add_dependencies(regamedll appversion)
+target_sources(regamedll PRIVATE
+	${GAMEDLL_SRCS}
+	${ENGINE_SRCS}
+	${SHARED_SRCS}
+
+	$<$<CONFIG:Unittests>:
+	${UNITTESTS_SRCS}>
+)
+
+target_link_libraries(regamedll PRIVATE
+	dl
+	aelf32
+)
+
+if (USE_STATIC_LIBSTDC)
+	target_compile_definitions(regamedll PRIVATE BUILD_STATIC_LIBSTDC)
+	set(LINK_FLAGS "${LINK_FLAGS} -static-libgcc -static-libstdc++")
+endif()
+
+set(LINK_FLAGS "${LINK_FLAGS} \
+	-Wl,-rpath,'$ORIGIN/.' \
+	-L${PROJECT_SOURCE_DIR}/lib/linux32")
+
+set_target_properties(regamedll PROPERTIES
+	OUTPUT_NAME cs
+	PREFIX ""
+	COMPILE_FLAGS ${COMPILE_FLAGS}
+	LINK_FLAGS ${LINK_FLAGS}
+	POSITION_INDEPENDENT_CODE OFF
+)
diff --git a/regamedll/common/stdc++compat.cpp b/regamedll/common/stdc++compat.cpp
index 27dc579e..1937b9b3 100644
--- a/regamedll/common/stdc++compat.cpp
+++ b/regamedll/common/stdc++compat.cpp
@@ -1,15 +1,23 @@
 #include <stdio.h>
+#include <stdlib.h>
 
-#if !defined(_WIN32)
-void NORETURN Sys_Error(const char *error, ...);
+#if !defined(_WIN32) && !defined(BUILD_STATIC_LIBSTDC) // if build with static libstdc++ then ignore
 
 // This file adds the necessary compatibility tricks to avoid symbols with
 // version GLIBCXX_3.4.16 and bigger, keeping binary compatibility with libstdc++ 4.6.1.
 namespace std
 {
+
+#if __cpp_exceptions
+	logic_error::logic_error(const char *__arg) : exception(), _M_msg(__arg) {}
+	out_of_range::out_of_range(const char *__arg) : logic_error(__arg) {}
+	out_of_range::~out_of_range() _GLIBCXX_USE_NOEXCEPT {}
+#endif // #if __cpp_exceptions
+
 	// We shouldn't be throwing exceptions at all, but it sadly turns out we call STL (inline) functions that do.
 	void __throw_out_of_range_fmt(const char *fmt, ...)
 	{
+	#if __cpp_exceptions
 		va_list ap;
 		char buf[1024]; // That should be big enough.
 
@@ -18,34 +26,42 @@ namespace std
 		buf[sizeof(buf) - 1] = '\0';
 		va_end(ap);
 
-		Sys_Error(buf);
+		throw std::out_of_range(buf);
+	#else
+		abort();
+	#endif
 	}
 }; // namespace std
 
-// Technically, this symbol is not in GLIBCXX_3.4.20, but in CXXABI_1.3.8,
-// but that's equivalent, version-wise. Those calls are added by the compiler
+// Was added in GCC 4.9
+// Technically, this symbol is not in GLIBCXX_3.4.20, but in CXXABI_1.3.8, but that's equivalent, version-wise.
+// Those calls are added by the compiler
 // itself on `new Class[n]` calls.
 extern "C"
 void __cxa_throw_bad_array_new_length()
 {
-	Sys_Error("Bad array new length.");
+#if __cpp_exceptions
+	throw std::bad_array_new_length();
+#else
+	abort();
+#endif
 }
 
-#if __cplusplus >= 201402L
+#if defined(__INTEL_COMPILER) && __cplusplus >= 201402L
 // This operator delete sized deallocations was added in c++14
 // and required at least not less than CXXABI_1.3.9
 // we should to keep CXXABI_1.3.8 for binary compatibility with oldest libstdc++.
-// G++ and clang allow to compile C++14 code with -fno-sized-deallocation to disable the new feature,
+// GCC and Clang allow to compile C++14 code with -fno-sized-deallocation to disable the new feature, but ICC isn't allow
 // so that our C++14 library code would never call that version of operator delete,
-// for other compilers we must override those operators for static linking to the library.
+// for ICC compiler we must override those operators for static linking to the library.
 void operator delete[](void *ptr, std::size_t size) noexcept
 {
-    ::operator delete(ptr);
+	::operator delete(ptr);
 }
 
 void operator delete(void *ptr, std::size_t size) noexcept
 {
-    ::operator delete(ptr);
+	::operator delete(ptr);
 }
 #endif
 
diff --git a/regamedll/compile.sh b/regamedll/compile.sh
deleted file mode 100755
index c75a2eed..00000000
--- a/regamedll/compile.sh
+++ /dev/null
@@ -1,7 +0,0 @@
-#!/bin/bash
-
-rm -rf build
-mkdir build
-cd build
-cmake ../ $*
-make
diff --git a/regamedll/dlls/bot/cs_bot_learn.cpp b/regamedll/dlls/bot/cs_bot_learn.cpp
index 63e6db28..bb6df51d 100644
--- a/regamedll/dlls/bot/cs_bot_learn.cpp
+++ b/regamedll/dlls/bot/cs_bot_learn.cpp
@@ -489,14 +489,14 @@ void CCSBot::UpdateSaveProcess()
 	HintMessageToAllPlayers("Saving...");
 	SaveNavigationMap(filename);
 
-	Q_sprintf(msg, "Navigation file '%s' saved.", filename);
+	Q_snprintf(msg, sizeof(msg), "Navigation file '%s' saved.", filename);
 	HintMessageToAllPlayers(msg);
 
 	hideProgressMeter();
 	StartNormalProcess();
 
 #ifndef REGAMEDLL_FIXES
-	Q_sprintf(cmd, "map %s\n", STRING(gpGlobals->mapname));
+	Q_snprintf(cmd, sizeof(cmd), "map %s\n", STRING(gpGlobals->mapname));
 #else
 	Q_snprintf(cmd, sizeof(cmd), "changelevel %s\n", STRING(gpGlobals->mapname));
 #endif
diff --git a/regamedll/engine/unicode_strtools.cpp b/regamedll/engine/unicode_strtools.cpp
index d19c92f0..e7e113ba 100644
--- a/regamedll/engine/unicode_strtools.cpp
+++ b/regamedll/engine/unicode_strtools.cpp
@@ -748,7 +748,7 @@ int Q_UnicodeConvertT(const SrcType *pIn, int nInChars, DstType *pOut, int nOutB
 	{
 		while (bStopAtNull ? (*pIn) : (nInChars-- > 0))
 		{
-			uchar32 uVal;
+			uchar32 uVal = '?';
 			bool bErr = false; // Initialize in order to avoid /analyze warnings.
 
 			pIn += DecodeSrc(pIn, uVal, bErr);
@@ -782,7 +782,7 @@ int Q_UnicodeConvertT(const SrcType *pIn, int nInChars, DstType *pOut, int nOutB
 		int nMaxOut = nOutElems - 1; // print symbols count
 		while (bStopAtNull ? (*pIn) : (nInChars-- > 0))
 		{
-			uchar32 uVal;
+			uchar32 uVal = '?';
 			bool bErr = false; // Initialize in order to avoid /analyze warnings.
 
 			pIn += DecodeSrc(pIn, uVal, bErr);
diff --git a/regamedll/lib/linux32/libm.so b/regamedll/lib/linux32/libm.so
new file mode 100644
index 00000000..b0430eb9
Binary files /dev/null and b/regamedll/lib/linux32/libm.so differ
diff --git a/regamedll/lib/linux32/librt.so b/regamedll/lib/linux32/librt.so
new file mode 100644
index 00000000..4b39fa4a
Binary files /dev/null and b/regamedll/lib/linux32/librt.so differ
diff --git a/regamedll/pm_shared/pm_shared.cpp b/regamedll/pm_shared/pm_shared.cpp
index bbe213e5..b50fde66 100644
--- a/regamedll/pm_shared/pm_shared.cpp
+++ b/regamedll/pm_shared/pm_shared.cpp
@@ -23,13 +23,13 @@ void PM_SwapTextures(int i, int j)
 	char chTemp;
 	char szTemp[MAX_TEXTURENAME_LENGHT];
 
-	Q_strcpy(szTemp, pm_grgszTextureName[i]);
+	Q_strlcpy(szTemp, pm_grgszTextureName[i]);
 	chTemp = pm_grgchTextureType[i];
 
-	Q_strcpy(pm_grgszTextureName[i], pm_grgszTextureName[j]);
+	Q_strcpy_s(pm_grgszTextureName[i], pm_grgszTextureName[j]);
 	pm_grgchTextureType[i] = pm_grgchTextureType[j];
 
-	Q_strcpy(pm_grgszTextureName[j], szTemp);
+	Q_strlcpy(pm_grgszTextureName[j], szTemp);
 	pm_grgchTextureType[j] = chTemp;
 }
 
diff --git a/regamedll/version/glibc_test.sh b/regamedll/version/glibc_test.sh
new file mode 100755
index 00000000..74d41d2c
--- /dev/null
+++ b/regamedll/version/glibc_test.sh
@@ -0,0 +1,83 @@
+#!/bin/bash
+
+main()
+{
+	files=($@)
+
+	declare -A threshold_version
+	threshold_version[CXXABI]="1.3.5"
+	threshold_version[GLIBCXX]="3.4.15"
+	threshold_version[GLIBC]="2.11"
+
+	for k in "${!threshold_version[@]}"; do
+		for f in "${files[@]}"
+		do
+			:
+			version=$(readelf -sV $f | sed -n 's/.*@'$k'_//p' | sort -u -V | tail -1 | cut -d ' ' -f 1)
+
+			# version no present - skipped
+			if [[ -z "$version" ]]; then
+				version="UND"
+			# version is private - skipped
+			elif [ "$version" = "PRIVATE" ]; then
+				version="PRV"
+			# ensure numeric
+			elif [[ $version =~ ^([0-9]+\.){0,2}(\*|[0-9]+)$ ]]; then
+				check_version_greater $version ${threshold_version[$k]}
+				if [[ $? -eq 1 ]]; then
+					echo -e "\033[0;31mAssertion failed:\033[0m Binary \033[0;32m${f}\033[0m has ${k}_\033[0;33m$version\033[0m greater than max version ${k}_\033[0;33m${threshold_version[$k]}\033[0m"
+					exit -1
+				fi
+			fi
+		done
+
+		if [[ "$version" = "PRV" || "$version" = "UND" ]]; then
+			echo -e "[\033[0;90mSKIP\033[0m] \033[0;33m${version}\033[0m < ${k}_\033[0;33m${threshold_version[$k]}\033[0m"
+		else
+			echo -e "[\033[0;32mOK\033[0m] \033[0;33m${version}\033[0m < ${k}_\033[0;33m${threshold_version[$k]}\033[0m"
+		fi
+	done
+}
+
+check_version_greater()
+{
+	if [[ -z "$1" || $1 == $2 ]]; then
+		return 0
+	fi
+
+	local IFS=.
+	local i ver1=($1) ver2=($2)
+
+	# fill empty fields in ver1 with zeros
+	for ((i = ${#ver1[@]}; i < ${#ver2[@]}; i++))
+	do
+		ver1[i]=0
+	done
+
+	for ((i = 0; i < ${#ver1[@]}; i++))
+	do
+		if [[ -z ${ver2[i]} ]]
+		then
+			# fill empty fields in ver2 with zeros
+			ver2[i]=0
+		fi
+
+		if ((10#${ver1[i]} > 10#${ver2[i]}))
+		then
+			return 1
+		fi
+
+		if ((10#${ver1[i]} < 10#${ver2[i]}))
+		then
+			break
+		fi
+	done
+
+	return 0
+}
+
+# Initialize
+main $*
+
+# Exit normally
+exit 0