add ESP32 build system with xtensa-esp-elf toolchain

build/esp32/Makefile

@@ -22,11 +22,11 @@ EXCLUDE     := $(SRCDIR)/spider/runtime/util/Terminal.cpp \
                $(SRCDIR)/spider/runtime/debug/LiveDebug.cpp \
                $(SRCDIR)/spider/SpiderRuntime.cpp
 
-# ESP32 specific entry point
+# ESP32 specific entry point (local to this build folder)
-EXTRA       := $(SRCDIR)/spider/main_esp32.cpp
+EXTRA       := ./main_esp32.cpp
 
 SOURCES     := $(filter-out $(EXCLUDE), $(shell find $(SRCDIR) -type f -name "*.$(SRCEXT)" 2>/dev/null)) $(EXTRA)
-OBJECTS     := $(patsubst $(SRCDIR)/%,$(BUILDDIR)/%,$(SOURCES:.$(SRCEXT)=.$(OBJEXT)))
+OBJECTS     := $(patsubst ./%,$(BUILDDIR)/%,$(patsubst $(SRCDIR)/%,$(BUILDDIR)/%,$(SOURCES:.$(SRCEXT)=.$(OBJEXT))))
 
 all: directories $(TARGET)
 	@echo "Build complete: $(TARGETDIR)/$(TARGET)"
@@ -53,4 +53,9 @@ $(BUILDDIR)/%.$(OBJEXT): $(SRCDIR)/%.$(SRCEXT)
 	@echo "Compiling $<..."
 	$(CC) $(CFLAGS) $(INC) -c -o $@ $<
 
+$(BUILDDIR)/%.$(OBJEXT): ./%.$(SRCEXT)
+	@mkdir -p $(dir $@)
+	@echo "Compiling $<..."
+	$(CC) $(CFLAGS) $(INC) -c -o $@ $<
+
 .PHONY: all remake clean cleaner

build/esp32/gen_makefile.py

@@ -25,11 +25,11 @@ EXCLUDE     := {dollar}(SRCDIR)/spider/runtime/util/Terminal.cpp \\
                {dollar}(SRCDIR)/spider/runtime/debug/LiveDebug.cpp \\
                {dollar}(SRCDIR)/spider/SpiderRuntime.cpp
 
-# ESP32 specific entry point
+# ESP32 specific entry point (local to this build folder)
-EXTRA       := {dollar}(SRCDIR)/spider/main_esp32.cpp
+EXTRA       := ./main_esp32.cpp
 
 SOURCES     := {dollar}(filter-out {dollar}(EXCLUDE), {dollar}(shell find {dollar}(SRCDIR) -type f -name "*.{dollar}(SRCEXT)" 2>/dev/null)) {dollar}(EXTRA)
-OBJECTS     := {dollar}(patsubst {dollar}(SRCDIR)/%,{dollar}(BUILDDIR)/%,{dollar}(SOURCES:.{dollar}(SRCEXT)=.{dollar}(OBJEXT)))
+OBJECTS     := {dollar}(patsubst ./%,{dollar}(BUILDDIR)/%,{dollar}(patsubst {dollar}(SRCDIR)/%,{dollar}(BUILDDIR)/%,{dollar}(SOURCES:.{dollar}(SRCEXT)=.{dollar}(OBJEXT))))
 
 all: directories {dollar}(TARGET)
 {tab}@echo "Build complete: {dollar}(TARGETDIR)/{dollar}(TARGET)"
@@ -56,6 +56,11 @@ cleaner: clean
 {tab}@echo "Compiling {dollar}<..."
 {tab}{dollar}(CC) {dollar}(CFLAGS) {dollar}(INC) -c -o {dollar}@ {dollar}<
 
+{dollar}(BUILDDIR)/%.{dollar}(OBJEXT): ./%.{dollar}(SRCEXT)
+{tab}@mkdir -p {dollar}(dir {dollar}@)
+{tab}@echo "Compiling {dollar}<..."
+{tab}{dollar}(CC) {dollar}(CFLAGS) {dollar}(INC) -c -o {dollar}@ {dollar}<
+
 .PHONY: all remake clean cleaner
 """
 

build/esp32/main_esp32.cpp

@@ -1,6 +1,6 @@
 // ESP32 entry point for Spider Runtime
 // This replaces SpiderRuntime.cpp for microcontroller builds
-#include "SpiderRuntime.hpp"
+#include <spider/SpiderRuntime.hpp>
 
 int main() {
     // TODO: initialize Spider runtime for ESP32