Add minimal Makefile fallback for Windows when autotools fail

- Create create-minimal-makefile.sh to generate basic libatari800 build
- Includes essential source files and minimal config.h
- Fallback activates when no autotools are available in Windows CI
- Bypasses autotools entirely with direct GCC compilation
- Should allow Windows build to proceed even without working autotools

Author: pedgarcia

scripts/configure-atari800.sh

@@ -3,6 +3,7 @@
 
 set -e
 
+SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
 ATARI800_SRC_PATH="$1"
 
 if [ -z "$ATARI800_SRC_PATH" ]; then
@@ -71,10 +72,14 @@ if [ ! -f "configure" ]; then
                 echo "Using autoconf/aclocal manually..."
                 aclocal && autoheader && autoconf && automake --add-missing --copy || true
             else
-                echo "ERROR: No autotools available and no pre-built configure script found"
-                echo "Available files:"
-                ls -la
-                exit 1
+                echo "ERROR: No autotools available - using minimal Makefile fallback"
+                echo "Creating minimal build system for libatari800..."
+                "$SCRIPT_DIR/create-minimal-makefile.sh" "$ATARI800_SRC_PATH"
+                
+                # Skip the ./configure step since we're using direct Makefile
+                echo "Skipping configure step - using minimal Makefile approach"
+                echo "atari800 configuration completed (minimal build)"
+                exit 0
             fi
         else
             echo "ERROR: No configure.ac or configure.in found"

scripts/create-minimal-makefile.sh

@@ -0,0 +1,116 @@
+#!/bin/bash
+# create-minimal-makefile.sh - Create a minimal Makefile for libatari800 when autotools fail
+
+set -e
+
+ATARI800_SRC_PATH="$1"
+
+if [ -z "$ATARI800_SRC_PATH" ]; then
+    echo "Error: ATARI800_SRC_PATH not provided"
+    exit 1
+fi
+
+cd "$ATARI800_SRC_PATH"
+
+echo "Creating minimal Makefile for libatari800..."
+
+# Create a basic Makefile that compiles the essential files for libatari800
+cat > Makefile << 'EOF'
+# Minimal Makefile for libatari800
+# Generated when autotools are not available
+
+CC = gcc
+AR = ar
+CFLAGS = -O2 -DHAVE_CONFIG_H -I. -Isrc -DTARGET_LIBATARI800 -DNETSIO
+ARFLAGS = rcs
+
+LIBATARI800_OBJS = \
+	src/afile.o \
+	src/antic.o \
+	src/atari.o \
+	src/cartridge.o \
+	src/cpu.o \
+	src/esc.o \
+	src/gtia.o \
+	src/memory.o \
+	src/monitor.o \
+	src/pbi.o \
+	src/pia.o \
+	src/pokey.o \
+	src/sio.o \
+	src/statesav.o \
+	src/pbi_mio.o \
+	src/pbi_bb.o \
+	src/pbi_xld.o \
+	src/libatari800/api.o \
+	src/libatari800/main.o \
+	src/libatari800/init.o \
+	src/libatari800/input.o \
+	src/libatari800/statesav.o
+
+all: src/libatari800.a
+
+src/libatari800.a: $(LIBATARI800_OBJS)
+	$(AR) $(ARFLAGS) $@ $^
+
+%.o: %.c
+	$(CC) $(CFLAGS) -c $< -o $@
+
+clean:
+	rm -f $(LIBATARI800_OBJS) src/libatari800.a
+
+.PHONY: all clean
+EOF
+
+# Create a minimal config.h
+cat > src/config.h << 'EOF'
+/* Minimal config.h for libatari800 */
+#ifndef CONFIG_H
+#define CONFIG_H
+
+#define PACKAGE_STRING "atari800 4.2.0"
+#define HAVE_STDINT_H 1
+#define HAVE_STDLIB_H 1
+#define HAVE_STRING_H 1
+#define HAVE_UNISTD_H 1
+
+#ifdef _WIN32
+#define HAVE_WINDOWS_H 1
+#define HAVE_WINSOCK2_H 1
+#endif
+
+#define SUPPORTS_PLATFORM_CONFIGINIT 1
+#define SUPPORTS_PLATFORM_CONFIGURE 1
+#define SUPPORTS_PLATFORM_INITIALISE 1
+#define SUPPORTS_PLATFORM_EXIT 1
+#define SUPPORTS_SOUND_REINIT 1
+#define SOUND_GAIN 4
+#define STEREO_SOUND 1
+#define CONSOLE_SOUND 1
+#define SERIO_SOUND 1
+#define CLIP_SOUND 1
+#define SYNCHRONIZED_SOUND 1
+#define SOUND_INTERPOLATION 1
+#define NONLINEAR_MIXING 1
+
+/* NetSIO support */
+#define NETSIO 1
+
+/* Screenshot support */
+#define HAVE_LIBPNG 1
+
+/* Enable various features */
+#define PBI_MIO 1
+#define PBI_BB 1
+#define PBI_XLD 1
+#define IDE 1
+#define R_IO_DEVICE 1
+#define BUFFERED_LOG 1
+#define CYCLE_EXACT 1
+#define PAGED_ATTRIB 1
+
+#endif /* CONFIG_H */
+EOF
+
+echo "Created minimal Makefile and config.h for libatari800"
+echo "You can now run 'make' to build libatari800.a"