# vmkit: example build.
# Builds the portable example loader and its companion builder.
#
# Usage:
#   make              # build both example_loader and example_builder
#   make run-loader   # build + run the example loader
#   make run-builder  # build + run the example builder
#   make clean        # remove built artifacts
#
# Override CXX or CXXFLAGS as needed:
#   make CXX=g++
#   make CXXFLAGS="-std=c++20 -O3"

# Use = (not ?=) so we override Make's built-in default of g++.
# Override on the command line:  make CXX=g++
CXX      = clang++
CXXFLAGS = -std=c++20 -O2 -Wall -Wextra -Wpedantic
INCLUDES := -I.

# Detect MSYS2 / MinGW / Cygwin shells where MSYS-style /tmp paths leak into
# TMP/TEMP and break Microsoft's link.exe. In that case we point both at
# LOCALAPPDATA\Temp (resolved by the recipe shell at build time).
UNAME_S := $(shell uname -s 2>/dev/null)
ifneq (,$(filter MSYS% MINGW% CYGWIN%,$(UNAME_S)))
    EXE     := .exe
    RM      := rm -f
    TMP_FIX := TMP="$$LOCALAPPDATA\\Temp" TEMP="$$LOCALAPPDATA\\Temp"
else ifeq ($(OS),Windows_NT)
    EXE     := .exe
    RM      := rm -f
    TMP_FIX :=
else
    EXE     :=
    RM      := rm -f
    TMP_FIX :=
endif

EXAMPLES := example/example_loader$(EXE) example/example_builder$(EXE)

.PHONY: all clean run-loader run-builder

all: $(EXAMPLES)

# The builder reads example/payload.bin (raw shellcode) and emits the
# encrypted bytecode + payload header that the loader consumes. If you change
# payload.bin, embedded.h regenerates and the loader picks it up automatically.
example/embedded.h: example/example_builder$(EXE) example/payload.bin
	./$< example/payload.bin > $@

# Loader depends on the generated bytecode header.
example/example_loader$(EXE): example/example_loader.cpp vm_loader.hpp example/embedded.h
	$(TMP_FIX) $(CXX) $(CXXFLAGS) $(INCLUDES) $< -o $@

example/%$(EXE): example/%.cpp vm_loader.hpp
	$(TMP_FIX) $(CXX) $(CXXFLAGS) $(INCLUDES) $< -o $@

run-loader: example/example_loader$(EXE)
	./$<

run-builder: example/example_builder$(EXE)
	./$<

clean:
	-$(RM) $(EXAMPLES) example/embedded.h