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

SDL2_ttf/cmake/test/CMakeLists.txt

@@ -0,0 +1,49 @@
+# This cmake build script is meant for verifying the various CMake configuration script.
+
+cmake_minimum_required(VERSION 3.12)
+project(sdl_test LANGUAGES C)
+
+cmake_policy(SET CMP0074 NEW)
+
+# Override CMAKE_FIND_ROOT_PATH_MODE to allow search for SDL2_ttf outside of sysroot
+set(CMAKE_FIND_ROOT_PATH_MODE_PACKAGE NEVER)
+
+include(FeatureSummary)
+
+option(TEST_SHARED "Test linking to shared SDL2_ttf library" ON)
+add_feature_info("TEST_SHARED" TEST_SHARED "Test linking with shared library")
+
+option(TEST_STATIC "Test linking to static SDL2_ttf libary" ON)
+add_feature_info("TEST_STATIC" TEST_STATIC "Test linking with static library")
+
+if(TEST_SHARED)
+    # FIXME: in the distant future, must become REQUIRED
+    find_package(SDL2 CONFIG COMPONENTS SDL2)
+    # FIXME: and the following should be removed
+    if(NOT TARGET SDL2::SDL2)
+        list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_LIST_DIR}/..")
+        include(PrivateSdlFunctions)
+        sdl_find_sdl2(SDL2::SDL2 2.0)
+    endif()
+    find_package(SDL2_ttf REQUIRED CONFIG)
+    add_executable(main_shared main.c)
+    target_link_libraries(main_shared PRIVATE SDL2::SDL2 SDL2_ttf::SDL2_ttf)
+endif()
+
+if(TEST_STATIC)
+    # FIXME: in the distant future, must become REQUIRED
+    find_package(SDL2 CONFIG COMPONENTS SDL2-static)
+    # FIXME: and the following should be removed
+    if(NOT TARGET SDL2::SDL2-static)
+        list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_LIST_DIR}/..")
+        include(PrivateSdlFunctions)
+        sdl_find_sdl2(SDL2::SDL2-static 2.0)
+    endif()
+    # some static vendored libraries use c++ (enable CXX after `find_package` might show a warning)
+    enable_language(CXX)
+    find_package(SDL2_ttf REQUIRED CONFIG)
+    add_executable(main_static main.c)
+    target_link_libraries(main_static PRIVATE SDL2::SDL2-static SDL2_ttf::SDL2_ttf-static)
+endif()
+
+feature_summary(WHAT ALL)

SDL2_ttf/cmake/test/main.c

@@ -0,0 +1,18 @@
+#define SDL_MAIN_HANDLED
+#include "SDL.h"
+#include "SDL_ttf.h"
+#include <stdio.h>
+
+int main(int argc, char *argv[]) {
+    SDL_SetMainReady();
+    if (SDL_Init(0) < 0) {
+        fprintf(stderr, "could not initialize sdl2: %s\n", SDL_GetError());
+        return 1;
+    }
+    if (TTF_Init() == -1) {
+        fprintf(stderr, "TTF_Init: %s\n", TTF_GetError());
+    }
+    TTF_Quit();
+    SDL_Quit();
+    return 0;
+}