Attempt to fix windows mingw build

Author: ChillerDragon

CMakeLists.txt

@@ -49,6 +49,7 @@ target_link_libraries(twbl ${TWBL_DEPS})
 include_directories(src)
 
 if(TARGET_OS STREQUAL "windows")
+    # definitions from ddnet
     # See https://learn.microsoft.com/en-us/windows/win32/winprog/using-the-windows-headers
     add_compile_definitions(${target} PRIVATE NOMINMAX) # windows.h shouldn't define min/max macros
     add_compile_definitions(${target} PRIVATE WIN32_LEAN_AND_MEAN) # windows.h shouldn't define the name IStorage
@@ -58,6 +59,10 @@ if(TARGET_OS STREQUAL "windows")
     add_compile_definitions(${target} PRIVATE _WIN32_WINNT=0x0600) # Minimum OS version (old macro, both must be defined)
     add_compile_definitions(${target} PRIVATE UNICODE) # Windows headers
     add_compile_definitions(${target} PRIVATE _UNICODE) # C-runtime
+
+    # twbl specific hack for #ifdef WIN32 checks
+    # to avoid detect.h on windows systems that dont define WIN32 like mingw
+    add_compile_definitions(${target} PRIVATE WIN32)
 endif()
 
 set(LINK_FLAGS_PLATFORM "")

src/twbl/teeworlds/base/detect.h

@@ -8,6 +8,8 @@
 /* windows Family */
 #if defined(WIN64) || defined(_WIN64)
 #define CONF_FAMILY_WINDOWS 1
+#elif defined(WIN32) || defined(_WIN32) || defined(__CYGWIN32__) || defined(__MINGW32__)
+#define CONF_FAMILY_WINDOWS 1
 #endif
 
 /* unix family */