Stashed some testing files used to make sure that the library can also be used from pure C projects (better compatibility). These changes will never go to master as-is.

ctest/CMakeLists.txt

@@ -0,0 +1,3 @@
+include_directories(${CMAKE_SOURCE_DIR}/include)
+add_executable(ctest main.c)
+target_link_libraries(ctest astaroth_core)

ctest/main.c

@@ -0,0 +1,17 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "astaroth.h"
+
+int
+main(void)
+{
+    AcMeshInfo info = {
+        .int_params[AC_mx] = 128,
+        .int_params[AC_my] = 64,
+        .int_params[AC_mz] = 32,
+    };
+    acInit(info);
+    acQuit();
+    return EXIT_SUCCESS;
+}