yeputons · March 25, 2014 18:28
diff --git a/a.cpp b/a.cpp
 #include <cstdio>
 #include "message.h"

 void foo();

 int main() {
  printf("main: %s\n", MESSAGE);
  foo();
  return 0;
 }
diff --git a/b.cpp b/b.cpp
 #include <cstdio>
 #include "message.h"

 void foo() {
  printf("foo: %s\n", MESSAGE);
 }
diff --git a/Makefile b/Makefile
 all: main.exe
 	main.exe

 main.exe: a.o b.o
 	g++ -o $@ $^

 %.o: %.cpp
 	g++ -o $@ -c $<

 a.cpp: message.h
 b.cpp: message.h
diff --git a/message.h b/message.h
 namespace {
  const char* MESSAGE = "WORLD";
 }