Properly disable NetSIO on Windows per official atari800 limitations

- NetSIO is officially not supported on Windows in atari800 emulator
- Windows users should use Altirra emulator + FujiNet-PC instead
- Removed NetSIO from Windows minimal build configuration
- Added explanation comments about platform limitation

This fixes pthread.h missing error since NetSIO requires Unix threading
that isn't available/supported on Windows builds.

Author: pedgarcia

scripts/create-minimal-makefile.sh

@@ -28,7 +28,7 @@ cat > Makefile << 'EOF'
 
 CC = gcc
 AR = ar
-CFLAGS = -O2 -DHAVE_CONFIG_H -I. -Isrc -DTARGET_LIBATARI800 -DNETSIO
+CFLAGS = -O2 -DHAVE_CONFIG_H -I. -Isrc -DTARGET_LIBATARI800
 ARFLAGS = rcs
 
 LIBATARI800_OBJS = \
@@ -118,7 +118,8 @@ cat > src/config.h << 'EOF'
 #define SOUND 1
 
 /* NetSIO support */
-#define NETSIO 1
+/* NETSIO officially not supported on Windows platform */
+#undef NETSIO
 
 /* Screenshot support */
 #define HAVE_LIBPNG 1

src/windows_compat.h

@@ -3,6 +3,12 @@
 
 #ifdef _WIN32
 
+// Disable NETSIO on Windows - officially not supported on Windows platform
+// NetSIO only works with Linux/macOS. Windows users should use Altirra + FujiNet-PC instead
+#ifdef NETSIO
+#undef NETSIO
+#endif
+
 // Prevent common macro conflicts
 #define WIN32_LEAN_AND_MEAN
 #define NOMINMAX