Hello world initilized

src/Makefile

@@ -0,0 +1,27 @@
+OBJECTS = main.o
+TARGET = hello
+
+all: $(TARGET)
+
+$(TARGET): $(OBJECTS)
+	$(CC) -o $@ $^
+
+main.o: | new_header
+main.o: version.h
+
+new_header:
+	@sed -e "s/<version>/$$(git describe)/g" \
+		<version.h.in> version.h.tmp
+	@if diff -q version.h.tmp version.h > /dev/null 2>&1; \
+		then \
+			rm version.h.tmp; \
+		else \
+			echo "version.h.in => version.h" ; \
+			mv version.h.tmp version.h;\
+		fi
+
+clean:
+	rm -f $(TARGET) $(OBJECTS) version.h
+
+.PHONY: all clean
+

src/main.c

@@ -0,0 +1,8 @@
+#include "version.h"
+#include <stdio.h>
+
+int main(){
+	printf("Hello, world. \n");
+	printf("version: %s. \n", _VERSION);
+	return 0;
+}

src/version.h

@@ -0,0 +1,6 @@
+#ifndef HELLO_WORLD_VERSION_H
+#define HELLO_WORLD_VERSION_H
+
+#define _VERSION "old_practise"
+
+#endif