diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
new file mode 100644
index 0000000..bd936d2
--- /dev/null
+++ b/.github/workflows/build.yml
@@ -0,0 +1,32 @@
+name: CMake with GoogleTest on multiple platforms
+
+on:
+  pull_request:
+    branches: "*"
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Install compiler
+        id: install_cc
+        uses: rlalik/setup-cpp-compiler@master
+        with:
+          compiler: latest
+        
+      - name: Configure CMake
+        run: >
+          cmake -B build
+          -DCMAKE_CXX_COMPILER=${{ steps.install_cc.outputs.cxx }}
+          -DCMAKE_C_COMPILER=${{ steps.install_cc.outputs.cc }}
+          -DCMAKE_BUILD_TYPE=Debug
+          -S ${{ github.workspace }}
+        
+      - name: Build
+        run: cmake --build build --parallel
+
+      - name: Test
+        working-directory: build
+        run: ctest --output-on-failure
diff --git a/CMakeLists.txt b/CMakeLists.txt
index e2e1a03..b97dead 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -4,6 +4,20 @@ project (multini)
 set(CMAKE_CXX_STANDARD 23)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
 
+add_library(${PROJECT_NAME} INTERFACE
+  multini.hh
+)
+target_include_directories(${PROJECT_NAME} INTERFACE
+  ${CMAKE_CURRENT_SOURCE_DIR}
+)
+
+# Check if cmake is being used directly or via add_subdirectory
+if(NOT MULTINI_TESTS AND CMAKE_CURRENT_SOURCE_DIR STREQUAL CMAKE_SOURCE_DIR)
+    set(MULTINI_TESTS ON)
+endif()
+
+if (MULTINI_TESTS)
+
 include(FetchContent)
 FetchContent_Declare(
   googletest
@@ -21,8 +35,11 @@ add_executable (multini_tests multini_tests.cc multini.hh)
 
 target_link_libraries(
    multini_tests
+   ${PROJECT_NAME}
    GTest::gtest_main
 )
 
 include(GoogleTest)
 gtest_discover_tests(multini_tests)
+
+endif()
\ No newline at end of file
diff --git a/CMakePresets.json b/CMakePresets.json
index 73c3ee8..f5366e0 100644
--- a/CMakePresets.json
+++ b/CMakePresets.json
@@ -5,6 +5,11 @@
             "name": "windows",
             "generator": "Visual Studio 17 2022",
             "binaryDir": "${sourceDir}/build"
+        },
+        {
+            "name": "linux",
+            "generator": "Ninja",
+            "binaryDir": "${sourceDir}/build"
         }
     ]
 }
diff --git a/multini.hh b/multini.hh
index 589ce77..83df67a 100644
--- a/multini.hh
+++ b/multini.hh
@@ -33,6 +33,19 @@ public:
     }
 
 private:
+    static auto countPrefix(const std::string_view& sv, char ch)
+    {
+        return std::ranges::distance(sv
+            | std::views::take_while([ch](char c) { return c == ch; }));
+    }
+
+    static auto countSuffix(const std::string_view& sv, char ch)
+    {
+        return std::ranges::distance(sv
+            | std::views::reverse
+            | std::views::take_while([ch](char c) { return c == ch; }));
+    }
+
     class Line {
     public:
         Line(const std::string_view& line, int lineNum = 0, ErrorBag* errors = nullptr)
@@ -121,19 +134,6 @@ private:
               });
     }
 
-    static auto countPrefix(const std::string_view& sv, char ch)
-    {
-        return std::ranges::distance(sv
-            | std::views::take_while([ch](char c) { return c == ch; }));
-    }
-
-    static auto countSuffix(const std::string_view& sv, char ch)
-    {
-        return std::ranges::distance(sv
-            | std::views::reverse
-            | std::views::take_while([ch](char c) { return c == ch; }));
-    }
-
     ErrorBag mErrors {};
     std::multimap<std::string, std::map<std::string, std::string>> mSections {};
 };