no external dependencies

.github/workflows/config.yml

@@ -18,11 +18,11 @@ jobs:
       - name: Install prerequisites
         run: |
           sudo apt-get update && sudo apt-get install -y --no-install-recommends \
-          gcc g++ cmake libzip-dev libpugixml-dev
+          gcc g++ cmake libpugixml-dev
 
       - name: Configure and build
         run: |
-          cmake . -B build -DFMI4CPP_BUILD_TESTS=ON -DFMI4CPP_BUILD_EXAMPLES=ON -DCMAKE_BUILD_TYPE=Release
+          cmake . -B build -DFMI4CPP_BUILD_TESTS=ON -DFMI4CPP_USE_EXTERNAL_PUGIXML=ON -DFMI4CPP_BUILD_EXAMPLES=ON -DCMAKE_BUILD_TYPE=Release
           cmake --build build
 
       - name: Test
@@ -45,18 +45,9 @@ jobs:
     steps:
       - uses: actions/checkout@v3
 
-      - name: Restore artifacts, or run vcpkg, build (and cache artifacts as post step)
-        uses: lukka/run-vcpkg@v10
-        id: runvcpkg
-        with:
-          vcpkgDirectory: '${{ github.workspace }}/vcpkg'
-          vcpkgGitCommitId: '4cac260c4b7331538d31886f57739fea0bffa27e'
-          vcpkgJsonGlob: 'vcpkg.json'
-          appendedCacheKey: vcpkginstall
-
       - name: Configure and build
         run: |
-          cmake . -B build -DCMAKE_TOOLCHAIN_FILE="${{ github.workspace }}/vcpkg/scripts/buildsystems/vcpkg.cmake" -DFMI4CPP_BUILD_TESTS=ON -DFMI4CPP_BUILD_EXAMPLES=ON -DCMAKE_BUILD_TYPE=Release
+          cmake . -B build -DFMI4CPP_BUILD_TESTS=ON -DFMI4CPP_BUILD_EXAMPLES=ON -DCMAKE_BUILD_TYPE=Release
           cmake --build build
 
       - name: Test
@@ -75,18 +66,9 @@ jobs:
     steps:
       - uses: actions/checkout@v3
 
-      - name: Restore artifacts, or run vcpkg, build (and cache artifacts as post step)
-        uses: lukka/run-vcpkg@v10
-        id: runvcpkg
-        with:
-          vcpkgDirectory: '${{ github.workspace }}/vcpkg'
-          vcpkgGitCommitId: '4cac260c4b7331538d31886f57739fea0bffa27e'
-          vcpkgJsonGlob: 'vcpkg.json'
-          appendedCacheKey: vcpkginstall
-
       - name: Configure and build
         run: |
-          cmake . -B build -A x64 -DCMAKE_TOOLCHAIN_FILE="${{ github.workspace }}/vcpkg/scripts/buildsystems/vcpkg.cmake" -DFMI4CPP_BUILD_TESTS=ON -DFMI4CPP_BUILD_EXAMPLES=ON -DCMAKE_BUILD_TYPE=Release
+          cmake . -B build -A x64 -DFMI4CPP_BUILD_TESTS=ON -DFMI4CPP_BUILD_EXAMPLES=ON -DCMAKE_BUILD_TYPE=Release
           cmake --build build --config Release
         shell: bash
 

BUILDING.md

@@ -1,15 +1,22 @@
 ### BUILDING
 
-For building FMI4cpp, you can use either `vcpkg` or `apt-get` for getting the required dependencies.
+FMI4cpp does not need any additional dependencies. For unzipping in depends on system tools.
+This should be available on Windows, on linux you might need to install `unzip``.
 
-##### vcpkg
+```bash
+Linux:~/$ sudo apt-get install unzip
+``` 
+
+For XML handling, it ships with a version of pugiXML. If you want to use an external version then pass
+`-DFMI4CPP_USE_EXTERNAL_PUGIXML=ON` to CMake.
 
-Call CMake with `-DCMAKE_TOOLCHAIN_FILE=[path to vcpkg]/scripts/buildsystems/vcpkg.cmake`
+#### External pgiXML (Optional) 
+To get an external pugiXML version you may use `vcpkg` or `apt-get`.
 
 ##### apt-get
 
 ```bash
-Linux:~/$ sudo apt-get install libzip-dev libpugixml-dev
+Linux:~/$ sudo apt-get install libpugixml-dev
 ``` 
 
 ### Running examples/tests

CMakeLists.txt

@@ -10,6 +10,7 @@ message("Current fmi4cpp version: ${projectVersion}\n")
 
 option(FMI4CPP_BUILD_TESTS "Build tests" OFF)
 option(FMI4CPP_BUILD_EXAMPLES "Build examples" OFF)
+option(FMI4CPP_USE_EXTERNAL_PUGIXML "Use external pugiXML" OFF)
 option(BUILD_SHARED_LIBS "Build shared libraries instead of static libraries" ON)
 
 set(FMI4CPP_LOG_LEVEL "DEFAULT" CACHE STRING "FMI4cpp logging level")
@@ -54,8 +55,9 @@ set(FMI4CPP_EXPORT_TARGET "${PROJECT_NAME}-targets")
 # Dependencies
 # ==============================================================================
 
-find_package(LIBZIP REQUIRED)
-find_package(PugiXML REQUIRED)
+if (FMI4CPP_USE_EXTERNAL_PUGIXML)
+    find_package(PugiXML REQUIRED)
+endif ()
 
 if (FMI4CPP_BUILD_TESTS)
 
@@ -124,7 +126,6 @@ install(FILES "${versionFile}" DESTINATION "${FMI4CPP_CMAKE_INSTALL_DIR}")
 
 # Install custom find modules
 install(FILES
-        ${PROJECT_SOURCE_DIR}/cmake/FindLIBZIP.cmake
         ${PROJECT_SOURCE_DIR}/cmake/FindPugiXML.cmake
         DESTINATION
         ${FMI4CPP_CMAKE_INSTALL_DIR}