Archive old platform-specific Makefiles for reference

- Move Makefile.{android,common,osx,rpi64,unix,windows} to Makefiles/old_unified_makefile_backup/
- Create Makefile.backup.old as reference copy
- Old build configuration now available for historical reference

Makefile.backup.old

@@ -0,0 +1,105 @@
+# --- Global Variables ---
+DEBUG ?= 0
+PSS_STYLE ?= 1
+EXTERNAL_ZLIB ?= 0
+HAVE_GRIFFIN ?= 1
+STATIC_LINKING ?= 0
+CORE_DIR := .
+TARGET_NAME := supermodel
+
+# --- Platform Detection ---
+ifeq ($(platform),)
+    platform = unix
+    ifeq ($(shell uname -a),)
+        platform = win
+    else ifneq ($(findstring MINGW,$(shell uname -a)),)
+        platform = win
+    else ifneq ($(findstring Darwin,$(shell uname -a)),)
+        platform = osx
+    else ifneq ($(findstring win,$(shell uname -a)),)
+        platform = win
+    endif
+endif
+
+# --- Include Common Sources FIRST ---
+# This populates SOURCES_C, SOURCES_CXX and base INCFLAGS
+include Makefile.common
+
+# --- Include Platform Specifics SECOND ---
+# This allows Windows/Unix/OSX files to APPEND to INCFLAGS and set CC/CXX/OBJOUT
+ifneq (,$(findstring msvc,$(platform)))
+    include Makefile.windows
+else ifneq (,$(findstring win,$(platform)))
+    include Makefile.windows
+else ifneq (,$(findstring osx,$(platform)))
+    include Makefile.osx
+else ifneq (,$(findstring android,$(platform)))
+    include Makefile.android
+else ifneq (,$(findstring rpi5,$(platform)))
+    include Makefile.rpi64
+else ifneq (,$(findstring rpi4-64,$(platform)))
+    include Makefile.rpi64
+else ifneq (,$(findstring rpi64,$(platform)))
+    include Makefile.rpi64
+else
+    include Makefile.unix
+endif
+
+# --- Safety Defaults (In case platform files miss them) ---
+OBJOUT  ?= -o
+LINKOUT ?= -o
+
+# --- Flag Assembly ---
+GIT_VERSION := " $(shell git rev-parse --short HEAD || echo unknown)"
+ifneq ($(GIT_VERSION)," unknown")
+    DEFINES += -DGIT_VERSION=\"$(GIT_VERSION)\"
+endif
+
+OBJECTS := $(SOURCES_C:.c=.o) $(SOURCES_CXX:.cpp=.o)
+
+# Combine defines from common file and platform settings
+# Use += to ensure we don't wipe out GLEW_STATIC or other Windows flags
+DEFINES += $(COREDEFINES) $(PLATFORM_DEFINES) -DSUPERMODEL_OSD_LIBRETRO
+
+ifeq ($(STATIC_LINKING),1)
+    DEFINES += -DSTATIC_LINKING
+endif
+
+ifeq ($(platform), sncps3)
+    WARNING_DEFINES =
+else ifneq (,$(findstring msvc,$(platform)))
+    WARNING_DEFINES =
+    LIBM :=
+else
+    WARNING_DEFINES = -Wno-write-strings
+endif
+
+CFLAGS   += $(fpic) $(WARNING_DEFINES) $(DEFINES)
+CXXFLAGS += $(fpic) $(WARNING_DEFINES) $(DEFINES)
+LDFLAGS  += $(LIBM)
+
+# --- Build Rules ---
+all: $(TARGET)
+
+$(TARGET): $(OBJECTS)
+ifeq ($(STATIC_LINKING),1)
+ifneq (,$(findstring msvc,$(platform)))
+	$(LD) $(LINKOUT)$@ $(OBJECTS)
+else
+	$(AR) rcs $@ $(OBJECTS)
+endif
+else
+	$(LD) $(LINKOUT)$@ $(SHARED) $(OBJECTS) $(LDFLAGS) $(LIBS)
+endif
+
+# THE FIX: Note the absence of space between $(OBJOUT) and $@
+%.o: %.cpp
+	$(CXX) -c $(OBJOUT)$@ $< $(CXXFLAGS) $(INCFLAGS)
+
+%.o: %.c
+	$(CC) -c $(OBJOUT)$@ $< $(CFLAGS) $(INCFLAGS)
+
+clean:
+	rm -f $(OBJECTS)
+
+.PHONY: clean

Makefiles/old_unified_makefile_backup/Makefile.osx

@@ -18,17 +18,36 @@ ifeq ($(platform), osx)
     fpic := -fPIC
     SHARED := -dynamiclib
 
-    # --- Toolchain Detection ---
+    # --- Toolchain Detection & Auto-Setup ---
     # For native macOS builds
     ifeq ($(shell uname -s),Darwin)
         CC  ?= clang
         CXX ?= clang++
         CLANG_CMD := clang
     else
-        # Cross-compile from Linux
-        CC  ?= clang
-        CXX ?= clang++
-        CLANG_CMD := clang
+        # Cross-compile from Linux using osxcross
+        # Auto-detect osxcross installation at /opt/osxcross
+        OSXCROSS_ROOT ?= /opt/osxcross
+        
+        ifeq ($(shell test -f $(OSXCROSS_ROOT)/target/bin/o64-clang && echo found),found)
+            # osxcross found at $(OSXCROSS_ROOT)
+            # Override CC/CXX to use osxcross (prevents system cc from being used)
+            override CC := $(OSXCROSS_ROOT)/target/bin/o64-clang
+            override CXX := $(OSXCROSS_ROOT)/target/bin/o64-clang++
+            CLANG_CMD := $(OSXCROSS_ROOT)/target/bin/o64-clang
+            override LD := $(OSXCROSS_ROOT)/target/bin/o64-clang++
+            
+            # Ensure osxcross tools are in PATH for the build process
+            export PATH := $(OSXCROSS_ROOT)/target/bin:$(PATH)
+            
+            # Auto-set MACOSX_SDK if not already set
+            ifeq ($(MACOSX_SDK),)
+                MACOSX_SDK := $(OSXCROSS_ROOT)/target/SDK/MacOSX12.0.sdk
+            endif
+        else
+            # osxcross not found - give helpful error message
+            $(error osxcross not found at $(OSXCROSS_ROOT). Please install osxcross there, or override with: make platform=osx OSXCROSS_ROOT=/path/to/osxcross)
+        endif
     endif
 
     LD  := $(CXX)
@@ -63,7 +82,7 @@ ifeq ($(platform), osx)
     LIBS := -framework OpenGL -framework CoreFoundation -lz
 
     # --- FileSystem Path Implementation ---
-    SOURCES_CXX += $(CORE_DIR)/Src/OSD/Unix/FileSystemPath.cpp
+    SOURCES_CXX += $(CORE_DIR)/Src/OSD/OSX/FileSystemPath.cpp
     
     # macOS doesn't support Legacy3D (old fixed-pipeline OpenGL)
     # Modern macOS requires at least OpenGL 3.2 which doesn't have fixed-pipeline functions

Makefiles/old_unified_makefile_backup/Makefile.rpi64

@@ -3,7 +3,7 @@ CC  = aarch64-linux-gnu-gcc
 CXX = aarch64-linux-gnu-g++
 LD  = aarch64-linux-gnu-g++
 
-TARGET := $(TARGET_NAME)_libretro.so
+TARGET := $(TARGET_NAME)_libretro_aarch64.so
 fpic   := -fPIC
 SHARED := -shared -Wl,--version-script=$(CORE_DIR)/link.T -Wl,-no-undefined