Fix tests & examples on shared build on Windows

On Windows DLLs are created which must be in the same folder as the
executables.
Do that in the main CML and add a matching CI job

.github/workflows/build.yml

@@ -7,13 +7,6 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        name: [
-        linux-cmake,
-        linux-autotools,
-        macos-cmake,
-        macos-autotools,
-        windows-cmake
-        ]
         include:
           - name: linux-cmake
             os: ubuntu-latest
@@ -38,6 +31,11 @@ jobs:
             build-system: cmake
             configure-options: -DCMAKE_TOOLCHAIN_FILE=c:/vcpkg/scripts/buildsystems/vcpkg.cmake -DVCPKG_TARGET_TRIPLET=x64-windows
 
+          - name: windows-cmake-shared
+            os: windows-latest
+            build-system: cmake
+            configure-options: -DCMAKE_TOOLCHAIN_FILE=c:/vcpkg/scripts/buildsystems/vcpkg.cmake -DVCPKG_TARGET_TRIPLET=x64-windows -DBUILD_SHARED_LIBS=ON
+
     runs-on: ${{ matrix.os }}
     steps:
     - uses: actions/checkout@v2

CMakeLists.txt

@@ -113,6 +113,12 @@ if(LIBSAMPLERATE_EXAMPLES OR BUILD_TESTING)
   endif()
 
   set(HAVE_SNDFILE ${SndFile_FOUND})
+
+  # Windows DLLs need to be in the same folder as the executable to be found
+  if(WIN32 AND NOT DEFINED CMAKE_RUNTIME_OUTPUT_DIRECTORY)
+    set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${PROJECT_BINARY_DIR})
+  endif()
+
 endif()
 
 # SampleRate library