add a lib for rendering text in sdl2 and rules to make in makefile

SDL2_ttf/cmake/Findharfbuzz.cmake

@@ -0,0 +1,36 @@
+# Create our own Findharfbuzz.cmake module because harfbuzz-config.cmake,
+# distributed along e.g. msys2-mingw64 does not support anything other then APPLE and UNIX.
+
+include(FindPackageHandleStandardArgs)
+
+find_library(harfbuzz_LIBRARY
+    NAMES harfbuzz
+)
+
+find_path(harfbuzz_INCLUDE_PATH
+    NAMES hb.h
+    PATH_SUFFIXES harfbuzz
+)
+
+set(harfbuzz_COMPILE_FLAGS "" CACHE STRING "Extra compile flags of harfbuzz")
+
+set(harfbuzz_LINK_LIBRARIES "" CACHE STRING "Extra link libraries of harfbuzz")
+
+set(harfbuzz_LINK_FLAGS "" CACHE STRING "Extra link flags of harfbuzz")
+
+find_package_handle_standard_args(harfbuzz
+    REQUIRED_VARS harfbuzz_LIBRARY harfbuzz_INCLUDE_PATH
+)
+
+if (harfbuzz_FOUND)
+    if (NOT TARGET harfbuzz::harfbuzz)
+        add_library(harfbuzz::harfbuzz UNKNOWN IMPORTED)
+        set_target_properties(harfbuzz::harfbuzz PROPERTIES
+            IMPORTED_LOCATION "${harfbuzz_LIBRARY}"
+            INTERFACE_INCLUDE_DIRECTORIES "${harfbuzz_INCLUDE_PATH}"
+            COMPILE_FLAGS "${harfbuzz_COMPILE_FLAGS}"
+            INTERFACE_LINK_LIBRARIES "${harfbuzz_LINK_LIBRARIES}"
+            INTERFACE_LINK_FLAGS "${harfbuzz_LINK_FLAGS}"
+        )
+    endif()
+endif()