add makefile for ci

Makefile

@@ -0,0 +1,49 @@
+#!/usr/bin/make -f
+
+LINCC?=gcc
+LINCXX?=g++
+
+WINCC?=x86_64-w64-mingw32-gcc
+WINCXX?=x86_64-w64-mingw32-g++
+
+CFLAGS?=-O3 -flto
+LDFLAGS?=-static
+
+BUILDROOT?=build
+
+VERSION?=$(shell git describe)
+
+all: $(BUILDROOT)/maptool-linux-amd64-$(VERSION) $(BUILDROOT)/maptool-windows-amd64-$(VERSION).exe
+
+$(BUILDROOT)/linux-amd64/maptool/maptool:
+	mkdir -p $(BUILDROOT)/linux-amd64
+	cmake \
+		-B $(BUILDROOT)/linux-amd64 \
+		-G "Unix Makefiles" \
+		-DCMAKE_C_COMPILER=$(LINCC) \
+		-DCMAKE_CXX_COMPILER=$(LINCXX) \
+		-DCMAKE_C_FLAGS="$(CFLAGS)" \
+		-DCMAKE_EXE_LINKER_FLAGS="$(LDFLAGS)" \
+		.
+	$(MAKE) -C $(BUILDROOT)/linux-amd64 maptool
+
+$(BUILDROOT)/windows-amd64/maptool/maptool.exe:
+	mkdir -p $(BUILDROOT)/windows-amd64
+	cmake \
+		-B $(BUILDROOT)/windows-amd64 \
+		-G "Unix Makefiles" \
+		-DCMAKE_C_COMPILER=$(WINCC) \
+		-DCMAKE_CXX_COMPILER=$(WINCXX) \
+		-DCMAKE_C_FLAGS="$(CFLAGS)" \
+		-DCMAKE_EXE_LINKER_FLAGS="$(LDFLAGS)" \
+		-DCMAKE_SYSTEM_NAME="Windows" \
+		.
+	$(MAKE) -C $(BUILDROOT)/windows-amd64 maptool
+
+$(BUILDROOT)/maptool-linux-amd64-$(VERSION): $(BUILDROOT)/linux-amd64/maptool/maptool
+	cp $< $@
+
+$(BUILDROOT)/maptool-windows-amd64-$(VERSION).exe: $(BUILDROOT)/windows-amd64/maptool/maptool.exe
+	cp $< $@
+
+.PHONY: all