Windows build 2/2?

CMakeLists.txt

@@ -0,0 +1,62 @@
+cmake_minimum_required(VERSION 3.16)
+project(maturita C)
+
+set(CMAKE_C_STANDARD 11)
+set(CMAKE_C_STANDARD_REQUIRED ON)
+
+# GTK4 is found through pkg-config everywhere: Linux/macOS packages, MSYS2,
+# vcpkg and the native MSVC (gvsbuild) package all ship .pc files.
+if(MSVC)
+    # On MSVC the Unix-style flags pkg-config prints are not understood, so
+    # ask for the native "/I" and ".lib" form instead.
+    find_program(PKG_CONFIG_EXECUTABLE
+        NAMES pkg-config pkg-config.exe pkgconf pkgconf.exe)
+    if(NOT PKG_CONFIG_EXECUTABLE)
+        message(FATAL_ERROR
+            "pkg-config was not found. A native GTK4 install for MSVC "
+            "(e.g. gvsbuild) provides it; set PKG_CONFIG_PATH to "
+            "<GTK>/lib/pkgconfig. See README.md.")
+    endif()
+
+    execute_process(
+        COMMAND "${PKG_CONFIG_EXECUTABLE}" --cflags gtk4 --msvc-syntax
+        OUTPUT_VARIABLE GTK4_CFLAGS_RAW
+        OUTPUT_STRIP_TRAILING_WHITESPACE
+        RESULT_VARIABLE GTK4_CFLAGS_RESULT)
+    execute_process(
+        COMMAND "${PKG_CONFIG_EXECUTABLE}" --libs gtk4 --msvc-syntax
+        OUTPUT_VARIABLE GTK4_LIBS_RAW
+        OUTPUT_STRIP_TRAILING_WHITESPACE
+        RESULT_VARIABLE GTK4_LIBS_RESULT)
+
+    if(NOT GTK4_CFLAGS_RESULT EQUAL 0 OR NOT GTK4_LIBS_RESULT EQUAL 0)
+        message(FATAL_ERROR
+            "pkg-config could not find GTK4. Set PKG_CONFIG_PATH to "
+            "<GTK>/lib/pkgconfig (for example C:\\gtk\\lib\\pkgconfig).")
+    endif()
+
+    separate_arguments(GTK4_CFLAGS WINDOWS_COMMAND "${GTK4_CFLAGS_RAW}")
+    separate_arguments(GTK4_LIBS WINDOWS_COMMAND "${GTK4_LIBS_RAW}")
+else()
+    find_package(PkgConfig REQUIRED)
+    pkg_check_modules(GTK4 REQUIRED IMPORTED_TARGET gtk4)
+endif()
+
+# WIN32 suppresses the console window on Windows; the app still uses main(),
+# so MSVC needs mainCRTStartup as the entry point.
+if(WIN32)
+    add_executable(maturita WIN32 maturita.c)
+else()
+    add_executable(maturita maturita.c)
+endif()
+
+if(MSVC)
+    target_compile_options(maturita PRIVATE ${GTK4_CFLAGS})
+    target_link_options(maturita PRIVATE ${GTK4_LIBS})
+    target_link_options(maturita PRIVATE /ENTRY:mainCRTStartup)
+    target_compile_definitions(maturita PRIVATE _CRT_SECURE_NO_WARNINGS)
+else()
+    target_link_libraries(maturita PRIVATE PkgConfig::GTK4 m)
+    target_compile_options(maturita PRIVATE
+        -Wall -Wextra -Wno-deprecated-declarations)
+endif()